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Nakai K, Hirate Y, Nakajima T, Doi A, Hiramatsu T, Higaki T, Nakai A. Reliability and benefit of estimated continuous cardiac output measurement using shunt-side SpO 2 monitor in hemodialysis. Ther Apher Dial 2024. [PMID: 39129383 DOI: 10.1111/1744-9987.14193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 07/18/2024] [Accepted: 07/30/2024] [Indexed: 08/13/2024]
Abstract
INTRODUCTION Estimated continuous cardiac output (esCCO) is a novel technology that enables non-invasive and continuous monitoring of cardiac output. We compared the concordance in accuracies among esCCO measurements in the shunt limb and non-shunt limb. METHODS In this single-center prospective observational study, we include Japanese patients who underwent dialysis at our center between April 27, 2021, and February 28, 2023. Clinical accuracy of esCCO was evaluated in the shunted and non-shunted bilateral digits. Agreement between the measurements was analyzed using Lin's congruent correlation and Bland-Altman analysis. RESULTS For 43 individuals, Lin's concordance correlation coefficient was 0.9887 (95% confidence interval of 0.9886-0.9887) indicating good agreement. The values of esCCO measured in the shunt and non-shunt limbs were compatible. The percentage errors for the 43 patients with arterio-venous fistula (AVF) or arterio-venous graft (AVG), 32 with AVF, and 11 with AVG were 9.3%, 9.3%, and 8.9%, respectively. CONCLUSION esCCO could be used in shunt as well as non-shunt limbs during dialysis, allowing continuous and non-invasive hemodynamic monitoring.
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Affiliation(s)
- Koji Nakai
- College of Life and Health Sciences, Department of Clinical Engineering, Chubu University, Kasugai, Japan
| | - Yuichi Hirate
- College of Life and Health Sciences, Department of Clinical Engineering, Chubu University, Kasugai, Japan
| | - Takashi Nakajima
- Department of Nephrology, Nagoya Ekisaikai Hospital, Nagoya, Japan
| | - Atsushi Doi
- Department of Clinical Engineering, Nagoya Ekisaikai Hospital, Nagoya, Japan
| | - Takeyuki Hiramatsu
- College of Life and Health Sciences, Department of Clinical Engineering, Chubu University, Kasugai, Japan
| | - Toshie Higaki
- Department of Clinical Engineering, Nagoya Ekisaikai Hospital, Nagoya, Japan
| | - Aiko Nakai
- Department of Anesthesiology, Aichi Cancer Center, Nagoya, Japan
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Vetrugno L, Maggiore SM, Deana C, Bellini V, Bignami EG. Cardiac output wireless wearable devices are maybe not interchangeable with Swan-Ganz catheters yet, but the question is… have they reached mininvasive tools? J Clin Monit Comput 2024; 38:869-871. [PMID: 38700742 DOI: 10.1007/s10877-024-01167-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 08/04/2024]
Affiliation(s)
- Luigi Vetrugno
- Department of Medical, Oral and Biotecnological Science, "G. d'Annunzio" Chieti-Pescara University, Via dei Vestini n 33, Chieti, 66100, Italy.
- Department of Anesthesiology, Critical Care Medicine and Emergency, SS. Annunziata Hospital, Chieti, Italy.
| | - Salvatore Maurizio Maggiore
- Department of Anesthesiology, Critical Care Medicine and Emergency, SS. Annunziata Hospital, Chieti, Italy
- Department of Innovative Technologies in Medicine and Dentistry, Gabriele d'Annunzio University of Chieti- Pescara, Chieti, Italy
| | - Cristian Deana
- Department of Anesthesia and Intensive Care, Health Integrated Agency of Friuli Centrale, Udine, Italy
| | - Valentina Bellini
- Anesthesiology, Critical Care and Pain Medicine Division, Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Elena Giovanna Bignami
- Anesthesiology, Critical Care and Pain Medicine Division, Department of Medicine and Surgery, University of Parma, Parma, Italy
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Linden K, Schmandt M, Muders T, Theuerkauf N, Schewe JC, Herberg U, Putensen C, Ehrentraut SF, Kreyer S. Estimation of Cardiac Output Under Veno-Venous Extracorporeal Membrane Oxygenation: Comparing Thermodilution Methods to 3D Echocardiography. ASAIO J 2024:00002480-990000000-00533. [PMID: 39074443 DOI: 10.1097/mat.0000000000002283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024] Open
Abstract
Thermodilution methods to determine cardiac output (CO) may be affected by veno-venous extracorporeal membrane oxygenation (ECMO). We compared CO estimations by pulmonary arterial thermodilution using a pulmonary arterial catheter (COPAC), transpulmonary thermodilution (COTPTD), and three-dimensional echocardiography (3DEcho) (CO3DEcho) in 18 patients under veno-venous ECMO. Comparisons between CO3DEcho and COPAC, and COTPTD were performed using correlation statistics and Bland-Altman analysis. Blood flow on ECMO support ranged from 4.3 to 5.8 L/min (median 4.9 L/min). Cardiac output measured with three-dimensional echocardiography was 5.2 L/min (3.8/5.9), COPAC was 7.3 L/min (5.9/7.9), and COTPTD was 7.3 L/min (6/8.2) (median [25%/75% percentile]). Bland-Altman analysis of CO3DEcho and COPAC revealed a mean bias of -2.06 L/min, with limits of agreement from -4.16 to 0.04 L/min. Bland-Altman analysis of CO3DEcho and COTPTD revealed a mean bias of -2.22 L/min, with limits of agreement from -4.18 to -0.25 L/min. We found a negative mean bias and negative limits of agreement between CO3DEcho and COPAC/COTPTD. We concluded an influence on the estimation of CO by thermodilution under ECMO most likely due to loss of indicator resulting in an overestimation of CO. Clinicians should consider this when monitoring thermodilution-based CO under ECMO.
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Affiliation(s)
- Katharina Linden
- From the Department of Pediatric Cardiology, University Hospital Bonn, Bonn, Germany
- Department of Pediatric Cardiology, University Hospital Aachen, Aachen, Germany
| | - Mathias Schmandt
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Thomas Muders
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Nils Theuerkauf
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Jens-Christian Schewe
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre Rostock, Rostock, Germany
| | - Ulrike Herberg
- From the Department of Pediatric Cardiology, University Hospital Bonn, Bonn, Germany
- Department of Pediatric Cardiology, University Hospital Aachen, Aachen, Germany
| | - Christian Putensen
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Stefan Felix Ehrentraut
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Stefan Kreyer
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
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Yoshinaga K, Iizuka Y, Chiba Y, Sasabuchi Y, Sanui M. In vitro protamine addition for coagulation assessment using TEG 6s system during cardiopulmonary bypass: a pilot study. Gen Thorac Cardiovasc Surg 2024:10.1007/s11748-024-02061-7. [PMID: 39017825 DOI: 10.1007/s11748-024-02061-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 07/08/2024] [Indexed: 07/18/2024]
Abstract
OBJECTIVE Systemic heparinization during cardiopulmonary bypass (CPB) can significantly affect thromboelastography (TEG). This study investigated the feasibility of adding protamine in vitro to allow assessment of coagulation status using the TEG 6s system during CPB. METHODS In this prospective observational study, 21 patients undergoing elective cardiac valve surgery were evaluated. During CPB, protamine was added in vitro to the heparinized blood of these patients at a concentration of 0.05 mg/mL and analyzed with the TEG 6s (Pre). The TEG parameters were compared to those analyzed after CPB withdrawal and systemic protamine administration (Post). RESULTS The citrated kaolin maximal amplitude (CK-MA) and the citrated functional fibrinogen maximal amplitude (CFF-MA) exhibited strong correlations between Pre and Post measurements (r = 0.790 and 0.974, respectively, P < 0.001 for both), despite significant mean differences (-2.23 mm for CK-MA and -0.68 mm for CFF-MA). Bland-Altman analysis showed a clinically acceptable agreement between Pre and Post measurement of CK-MA and CFF-MA (the percentage error was 10.6% and 12.2%, respectively). In contrast, the citrated kaolin reaction time (CK-R) showed no significant correlation between Pre and Post measurements (r = 0.328, P = 0.146), with a mean difference of 1.42 min (95% CI: -0.45 to 3.29). CONCLUSIONS In vitro protamine addition allows assessment of coagulation status during CPB using the TEG 6s system. CK-MA and CFF-MA measured during CPB using this method revealed a strong correlation and agreement with post-CPB measurements, suggesting that our method potentially facilitates early prediction of post-CPB coagulation status and decision-making on transfusion strategies. CLINICAL TRIAL REGISTRATION The study was registered in the University Hospital Medical Information Network Clinical Trials Registry (UMIN-CTR, registration number: UMIN000041097, date of registration: July 13, 2020, https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000046925 ) before the recruitment of participants.
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Affiliation(s)
- Koichi Yoshinaga
- Department of Anesthesiology and Critical Care Medicine, Jichi Medical University Saitama Medical Center, 1-847, Amanuma-Cho, Omiya-Ku, Saitama-Shi, Saitama, 330-8503, Japan
| | - Yusuke Iizuka
- Department of Anesthesiology and Critical Care Medicine, Jichi Medical University Saitama Medical Center, 1-847, Amanuma-Cho, Omiya-Ku, Saitama-Shi, Saitama, 330-8503, Japan.
| | - Yoshihiko Chiba
- Department of Anesthesiology and Critical Care Medicine, Jichi Medical University Saitama Medical Center, 1-847, Amanuma-Cho, Omiya-Ku, Saitama-Shi, Saitama, 330-8503, Japan
| | - Yusuke Sasabuchi
- Department of Real-World Evidence, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Masamitsu Sanui
- Department of Anesthesiology and Critical Care Medicine, Jichi Medical University Saitama Medical Center, 1-847, Amanuma-Cho, Omiya-Ku, Saitama-Shi, Saitama, 330-8503, Japan
- Division of Critical Care, Department of Anesthesiology and Critical Care Medicine, Jichi Medical University, 3311-1, Yakushiji, Shimotsuke-Shi, Tochigi, 329-0498, Japan
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van Wyk L, Austin T, Barzilay B, Bravo MC, Breindahl M, Czernik C, Dempsey E, de Boode WP, de Vries W, Eriksen BH, Fauchére JC, Kooi EMW, Levy PT, McNamara PJ, Mitra S, Nestaas E, Rabe H, Rabi Y, Rogerson SR, Savoia M, Schena F, Seghal A, Schwarz CE, Thome U, van Laere D, Zaharie GC, Gupta S. A recommendation for the use of electrical biosensing technology in neonatology. Pediatr Res 2024:10.1038/s41390-024-03369-z. [PMID: 38977797 DOI: 10.1038/s41390-024-03369-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 05/17/2024] [Accepted: 06/07/2024] [Indexed: 07/10/2024]
Abstract
Non-invasive cardiac output monitoring, via electrical biosensing technology (EBT), provides continuous, multi-parameter hemodynamic variable monitoring which may allow for timely identification of hemodynamic instability in some neonates, providing an opportunity for early intervention that may improve neonatal outcomes. EBT encompasses thoracic (TEBT) and whole body (WBEBT) methods. Despite the lack of relative accuracy of these technologies, as compared to transthoracic echocardiography, the use of these technologies in neonatology, both in the research and clinical arena, have increased dramatically over the last 30 years. The European Society of Pediatric Research Special Interest Group in Non-Invasive Cardiac Output Monitoring, a group of experienced neonatologists in the field of EBT, deemed it appropriate to provide recommendations for the use of TEBT and WBEBT in the field of neonatology. Although TEBT is not an accurate determinant of cardiac output or stroke volume, it may be useful for monitoring longitudinal changes of hemodynamic parameters. Few recommendations can be made for the use of TEBT in common neonatal clinical conditions. It is recommended not to use WBEBT to monitor cardiac output. The differences in technologies, study methodologies and data reporting should be addressed in ongoing research prior to introducing EBT into routine practice. IMPACT STATEMENT: TEBT is not recommended as an accurate determinant of cardiac output (CO) (or stroke volume (SV)). TEBT may be useful for monitoring longitudinal changes from baseline of hemodynamic parameters on an individual patient basis. TEBT-derived thoracic fluid content (TFC) longitudinal changes from baseline may be useful in monitoring progress in respiratory disorders and circulatory conditions affecting intrathoracic fluid volume. Currently there is insufficient evidence to make any recommendations regarding the use of WBEBT for CO monitoring in neonates. Further research is required in all areas prior to the implementation of these monitors into routine clinical practice.
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Affiliation(s)
- Lizelle van Wyk
- Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa.
| | - Topun Austin
- Neonatal Intensive Care Unit, Rosie Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge Biomedical Campus, Cambridge, UK
| | - Bernard Barzilay
- Neonatal Intensive Care Unit, Assaf Harofeh Medical Center, Tzrifin, Israel
| | - Maria Carmen Bravo
- Department of Neonatology, La Paz University Hospital and IdiPaz, Madrid, Spain
| | - Morten Breindahl
- Department of Neonatology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Christoph Czernik
- Department of Neonatology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Eugene Dempsey
- Department of Paediatrics and Child Health, University College Cork, Cork, Ireland
| | - Willem-Pieter de Boode
- Department of Neonatology, Radboud University Medical Center, Radboud Institute for Health Sciences, Amalia Children's Hospital, Nijmegen, The Netherlands
| | - Willem de Vries
- Division of Woman and Baby, Department of Neonatology, University Medical Centre Utrecht, Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands
| | - Beate Horsberg Eriksen
- Department of Paediatrics, Møre and Romsdal Hospital Trust, Ålesund, Norway
- Clinical Research Unit, Norwegian University of Science and Technology, Trondheim, Norway
| | - Jean-Claude Fauchére
- Department of Neonatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Elisabeth M W Kooi
- Division of Neonatology, Department of Pediatrics, Beatrix Children's Hospital, University of Groningen, University Medical Centre, Groningen, The Netherlands
| | - Philip T Levy
- Department of Newborn Medicine, Boston Children's Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | | | - Subhabrata Mitra
- Institute for Women's Health, University College London, London, UK
| | - Eirik Nestaas
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Clinic of Paediatrics and Adolescence, Akershus University Hospital, Lørenskog, Norway
| | - Heike Rabe
- Brighton and Sussex Medical School, University of Sussex, Brighton, UK
| | | | - Sheryle R Rogerson
- Newborn Research Centre, The Royal Women's Hospital, Melbourne, VIC, Australia
- Department of Obstetrics and Gynaecology, The University of Melbourne, Melbourne, VIC, Australia
| | - Marilena Savoia
- Neonatal Intensive Care Unit, S Maria Della Misericordia Hospital, Udine, Italy
| | | | - Arvind Seghal
- Monash Newborn, Monash Children's Hospital, Melbourne, VIC, Australia
- Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Christop E Schwarz
- Department of Neonatology, Center for Pediatric and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany
| | - Ulrich Thome
- Division of Neonatology, Department of Pediatrics, University of Leipzig Medical Centre, Leipzig, Germany
| | - David van Laere
- Neonatal Intensive Care Unit, Universitair Ziekenhuis, Antwerp, Belgium
| | - Gabriela C Zaharie
- Neonatology Department, University of Medicine and Pharmacy, Iuliu Hatieganu, Cluj -Napoca, Romania
| | - Samir Gupta
- Department of Engineering, Durham University, Durham, UK
- Division of Neonatology, Department of Pediatrics, Sidra Medicine, Doha, Qatar
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García-Sanz V, Canfrán S, Gómez de Segura IA, Aguado D. Effect of end-inspiratory pause duration on respiratory system compliance calculation in mechanically ventilated dogs with healthy lungs. Vet Anaesth Analg 2024; 51:333-342. [PMID: 38772855 DOI: 10.1016/j.vaa.2024.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/01/2024] [Accepted: 03/20/2024] [Indexed: 05/23/2024]
Abstract
OBJECTIVE To compare respiratory system compliance (CRS), expressed per kilogram of bodyweight (CRSBW), calculated without end-inspiratory pause (EIP) and after three EIP times (0.2, 0.5 and 1 seconds) with that after 3 second EIP (considered the reference EIP for static CRS) and to determine the EIP times that provided CRSBW values in acceptable agreement with static CRSBW during controlled mechanical ventilation (CMV) in anaesthetized dogs. STUDY DESIGN Prospective, randomized, nonblinded, crossover clinical study. ANIMALS A group of 24 client-owned dogs with healthy lungs undergoing surgery in lateral recumbency. METHODS During CMV in dogs undergoing general anaesthesia, five EIPs [0 (no EIP), 0.2, 0.5, 1 and 3 seconds] were consecutively applied in random order. Tidal volume (Vt) was set at 10 mL kg-1 and positive end-expiratory pressure (PEEP) was not applied. Respiratory rate and inspiratory time were established according to each EIP time, setting EIP between 0 and 50% of the inspiratory time. The CRSBW was calculated as [expired Vt/(plateau pressure - PEEP)]/bodyweight and recorded every 15 seconds for 2 minutes after a 5 minute equilibration period with each EIP. One-way anova for repeated measures and the Bland-Altman analysis were used to compare CRSBW and evaluate agreement between EIP times, respectively. RESULTS The CRSBW was significantly greater as the EIP time increased up to 1 second (p < 0.05). In the Bland-Altman analysis, none of the tested EIPs (0, 0.2, 0.5 and 1 seconds) provided 95% confidence intervals for limits of agreement within the maximum allowed difference considered for acceptable agreement with 3 second EIP. CONCLUSIONS and clinical relevance An EIP ≤ to 1 second does not provide a CRSBW value in acceptable agreement with static CRSBW in healthy dogs. Besides, the application of an EIP ≤ to 0.5 seconds underestimates the static CRSBW to an increasing extent as the EIP time decreases.
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Affiliation(s)
- Virginia García-Sanz
- Department of Animal Medicine and Surgery, Veterinary Teaching Hospital, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain
| | - Susana Canfrán
- Department of Animal Medicine and Surgery, Veterinary Teaching Hospital, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain.
| | - Ignacio A Gómez de Segura
- Department of Animal Medicine and Surgery, Veterinary Teaching Hospital, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain
| | - Delia Aguado
- Department of Animal Medicine and Surgery, Veterinary Teaching Hospital, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain
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Sharma S, Ramachandran R, Rewari V, Trikha A. Evaluation of Electrical Cardiometry to Assess Fluid Responsiveness in Patients with Acute Circulatory Failure: A Comparative Study with Transthoracic Echocardiography. Indian J Crit Care Med 2024; 28:650-656. [PMID: 38994256 PMCID: PMC11234120 DOI: 10.5005/jp-journals-10071-24753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 06/03/2024] [Indexed: 07/13/2024] Open
Abstract
Aim Acute circulatory failure is commonly encountered in critically ill patients, that requires fluid administration as the first line of treatment. However, only 50% of patients are fluid-responsive. Identification of fluid responders is essential to avoid the harmful effects of overzealous fluid therapy. Electrical cardiometry (EC) is a non-invasive bedside tool and has proven to be as good as transthoracic echocardiography (TTE) to track changes in cardiac output. We aimed to look for an agreement between EC and TTE for tracking changes in cardiac output in adult patients with acute circulatory failure before and after the passive leg-raising maneuver. Materials and methods Prospective comparative study, conducted at a Tertiary Care Teaching Hospital. Results We recruited 125 patients with acute circulatory failure and found 42.4% (53 out of 125) to be fluid-responsive. The Bland-Altman plot analysis showed a mean difference of 2.08 L/min between EC and TTE, with a precision of 3.8 L/min. The limits of agreement (defined as bias ± 1.96SD), were -1.7 L/min and 5.8 L/min, respectively. The percentage of error between EC and TTE was 56% with acceptable limits of 30%. Conclusion The percentage error beyond the acceptable limit suggests the non-interchangeability of the two techniques. More studies with larger sample sizes are required to establish the interchangeability of EC with TTE for tracking changes in cardiac output in critically ill patients with acute circulatory failure. How to cite this article Sharma S, Ramachandran R, Rewari V, Trikha A. Evaluation of Electrical Cardiometry to Assess Fluid Responsiveness in Patients with Acute Circulatory Failure: A Comparative Study with Transthoracic Echocardiography. Indian J Crit Care Med 2024;28(7):650-656.
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Affiliation(s)
- Shashikant Sharma
- Department of Critical Care Medicine, Jay Prabha Medanta Hospital, Patna, Bihar, India
| | - Rashmi Ramachandran
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Vimi Rewari
- Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
| | - Anjan Trikha
- Department of Anesthesiology and Perioperative Medicine, Penn State College of Medicine, Hershey, Pennsylvania, United States
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Sato H, Miyata K, Yoshikawa K, Mizukami M. A comparison between the shoulder shifting test and seated reaching test by bland-altman plot: A pilot study. J Spinal Cord Med 2024; 47:522-529. [PMID: 36102743 PMCID: PMC11218575 DOI: 10.1080/10790268.2022.2122337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
BACKGROUND The Seated Reach Test (SRT) is an assessment tool for evaluating the sitting balance of individuals with a spinal cord injury (SCI). We developed the Shoulder Shifting Test (SST), which is a tool for measuring the reaching distance of individuals with difficulty in raising their arms, such as individuals with tetraplegia. OBJECTIVE To investigate the agreement between the SST and the SRT and the usefulness of the SST. SUBJECTS AND METHODS Sixteen subjects with SCI (age 52.9 ± 13.0 yrs; four with tetraplegia) performed the SST and the SRT. We determined the correlation coefficient to determine the relationship between the two tests. A Bland-Altman analysis was performed to confirm the systematic error, and the relative error (RE) was used to determine the compatibility of the two tests in three directions (front, right, left). We assessed the SST's usefulness by determining how many of 47 subjects (age 59.6 ± 13.6 yrs; 23 with tetraplegia) could not perform the SRT and how many could perform the SST. RESULTS The tests were strongly correlated. No systematic errors between the tests were observed. In all three directions, >75% of the subjects had an RE <20%. Eleven of the 47 subjects with SCI were unable to perform either test. Four to ten of the 36 subjects performed the SST due to the difficulty in raising their arms. CONCLUSION The SST was compatible with the SRT, and the sitting balance of more individuals with SCI could be assessed by the combination of these tests.
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Affiliation(s)
- Hiroki Sato
- Graduate School of Health Sciences, Ibaraki Prefectural University of Health Sciences, Ibaraki, Japan
- Iwate Prefectural Central Hospital, Iwate, Japan
| | - Kazuhiro Miyata
- Ibaraki Prefectural University of Health Sciences, Ibaraki, Japan
| | - Kenichi Yoshikawa
- Ibaraki Prefectural University of Health Sciences Hospital, Ibaraki, Japan
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Ronkainen HPO, Ylikauma LA, Pohjola MJ, Ohtonen PP, Erkinaro TM, Vakkala MA, Liisanantti JH, Juvonen TS, Kaakinen TI. Reliability of Bioreactance and Pulse-Power Analysis in Measuring Cardiac Index During Open Abdominal Aortic Surgery. J Cardiothorac Vasc Anesth 2024; 38:1484-1491. [PMID: 38631929 DOI: 10.1053/j.jvca.2024.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/30/2024] [Accepted: 02/05/2024] [Indexed: 04/19/2024]
Abstract
OBJECTIVE To investigate the accuracy, precision, and trending ability of noninvasive bioreactance-based Starling SV and the mini invasive pulse-power device LiDCOrapid as compared to thermodilution cardiac output (TDCO) as measured by pulmonary artery catheter when assessing cardiac index (CIx) in the setting of elective open abdominal aortic (AA) surgery. DESIGN A prospective method-comparison study. SETTING Oulu University Hospital, Finland. PARTICIPANTS Forty patients undergoing elective open abdominal aortic surgery. INTERVENTIONS Intraoperative CI measurements were obtained simultaneously with TDCO and the study monitors, resulting in 627 measurement pairs with Starling SV and 497 with LiDCOrapid. MEASUREMENTS AND MAIN RESULTS The Bland-Altman method was used to investigate the agreement among the devices, and four-quadrant plots with error grids were used to assess trending ability. The agreement between TDCO and Starling SV was associated with a bias of 0.18 L/min/m2 (95% confidence interval [CI] = 0.13 to 0.23), wide limits of agreement (LOA = -1.12 to 1.47 L/min/m2), and a percentage error (PE) of 63.7 (95% CI = 52.4-71.0). The agreement between TDCO and LiDCOrapid was associated with a bias of -0.15 L/min/m2 (95% CI = -0.21 to -0.09), wide LOA (-1.56 to 1.37), and a PE of 68.7 (95% CI = 54.9-79.6). The trending ability of neither device was sufficient. CONCLUSION The CI measurements achieved with Starling SV and LiDCOrapid were not interchangeable with TDCO, and the ability to track changes in CI was poor. These results do not support the use of either study device in monitoring CI during open AA surgery.
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Affiliation(s)
- Heikki Pekka Oskari Ronkainen
- Research Group of Surgery, Anesthesiology and Intensive Care Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.
| | - Laura Anneli Ylikauma
- Research Group of Surgery, Anesthesiology and Intensive Care Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Mari Johanna Pohjola
- Research Group of Surgery, Anesthesiology and Intensive Care Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Pasi Petteri Ohtonen
- Research Group of Surgery, Anesthesiology and Intensive Care Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland; Division of Operative Care, Oulu University Hospital, Oulu,Finland
| | - Tiina Maria Erkinaro
- Research Group of Surgery, Anesthesiology and Intensive Care Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Merja Annika Vakkala
- Research Group of Surgery, Anesthesiology and Intensive Care Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Janne Henrik Liisanantti
- Research Group of Surgery, Anesthesiology and Intensive Care Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Tatu Sakari Juvonen
- Department of Cardiac Surgery, Heart, and Lung Center, Helsinki University Central Hospital, Helsinki University Hospital, Helsinki, Finland
| | - Timo Ilari Kaakinen
- Research Group of Surgery, Anesthesiology and Intensive Care Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
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10
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Yim IHW, Drury NE, Lim HS. Derivation of Stroke Volume from Pulmonary Artery Pressures. Cardiol Ther 2024; 13:401-413. [PMID: 38664318 PMCID: PMC11093925 DOI: 10.1007/s40119-024-00360-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/13/2024] [Indexed: 05/15/2024] Open
Abstract
INTRODUCTION Intermittent cardiac output (CO) studies using thermodilution are considered the gold standard. We have developed a stroke volume (SV) calculator from pulmonary pulse pressure (PP) to allow continuous monitoring of SV and CO from PP. METHODS Hemodynamic data on 169 patients following orthotopic heart transplantation were used to compare our calculator-derived SV (and SV index, or SVi) against thermodilution-derived SV on admission into intensive care unit immediately following heart transplantation (T0) and 6 h after admission (T6). RESULTS The calculated SV correlated with thermodilution-derived SV T0 (r = 0.920, p < 0.001, coefficient of 0.539 and the constant of 2.06). The median calculator SV, adjusted for coefficient and constant, was 48.4 ml (37.7, 60.7), comparable to the median thermodilution-derived SV 47.9 ml (37.5, 61.0), p = 0.737 with acceptable agreement on Bland-Altman plots. The thermodilution-derived SVi was 28.1 ml (19.7, 38.7) and adjusted calculator-derived SVi 28.9 ml (19.7, 39.9), p = 0.781. At T6, median thermodilution-derived SVi was 27.7 ml (19.5, 35.9) compared to the calculator-derived SVi median of 26.1 ml (17.7, 37.7), p = 0.203. CONCLUSIONS Changes in PP can be used to track changes in SV using this calculator. Changes in PP may be used to assess response to treatment in the early post-operative period.
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Affiliation(s)
- Ivan H W Yim
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Nigel E Drury
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Hoong Sern Lim
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK.
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11
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Hirooka M, Ogawa S, Koizumi Y, Yoshida Y, Goto T, Yasuda S, Yamahira M, Tamai T, Kuromatsu R, Matsuzaki T, Suehiro T, Kamada Y, Sumida Y, Hiasa Y, Toyoda H, Kumada T. iATT liver fat quantification for steatosis grading by referring to MRI proton density fat fraction: a multicenter study. J Gastroenterol 2024; 59:504-514. [PMID: 38553657 PMCID: PMC11128405 DOI: 10.1007/s00535-024-02096-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 03/03/2024] [Indexed: 05/27/2024]
Abstract
BACKGROUND Several preliminary reports have suggested the utility of ultrasound attenuation coefficient measurements based on B-mode ultrasound, such as iATT, for diagnosing steatotic liver disease. Nonetheless, evidence supporting such utility is lacking. This prospective study aimed to investigate whether iATT is highly concordant with magnetic resonance imaging (MRI)-based proton density fat fraction (MRI-PDFF) and could well distinguish between steatosis grades. METHODS A cohort of 846 individuals underwent both iATT and MRI-PDFF assessments. Steatosis grade was defined as grade 0 with MRI-PDFF < 5.2%, grade 1 with 5.2% MRI-PDFF < 11.3%, grade 2 with 11.3% MRI-PDFF < 17.1%, and grade 3 with MRI-PDFF of 17.1%. The reproducibility of iATT and MRI-PDFF was evaluated using the Bland-Altman analysis and intraclass correlation coefficients, whereas the diagnostic performance of each steatosis grade was examined using receiver operating characteristic analysis. RESULTS The Bland-Altman analysis indicated excellent reproducibility with minimal fixed bias between iATT and MRI-PDFF. The area under the curve for distinguishing steatosis grades 1, 2, and 3 were 0.887, 0.882, and 0.867, respectively. A skin-to-capsula distance of ≥ 25 mm was identified as the only significant factor causing the discrepancy. No interaction between MRI-logPDFF and MRE-LSM on iATT values was observed. CONCLUSIONS Compared to MRI-PDFF, iATT showed excellent diagnostic accuracy in grading steatosis. iATT could be used as a diagnostic tool instead of MRI in clinical practice and trials. Trial registration This study was registered in the UMIN Clinical Trials Registry (UMIN000047411).
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Affiliation(s)
- Masashi Hirooka
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Toon, Ehime, 791-0295, Japan.
| | - Sadanobu Ogawa
- Department of Imaging Diagnosis, Ogaki Municipal Hospital, Ogaki, Japan
| | - Yohei Koizumi
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Toon, Ehime, 791-0295, Japan
| | - Yuichi Yoshida
- Department of Gastroenterology and Hepatology, Suita Municipal Hospital, Suita, Japan
| | - Tatsuya Goto
- Department of Imaging Diagnosis, Ogaki Municipal Hospital, Ogaki, Japan
| | - Satoshi Yasuda
- Department of Gastroenterology, Ogaki Municipal Hospital, Ogaki, Japan
| | - Masahiro Yamahira
- Department of Clinical Laboratory Medicine, Suita Municipal Hospital, Suita, Japan
| | - Tsutomu Tamai
- Department of Gastroenterology, Kagoshima City Hospital, Kagoshima, Japan
| | - Ryoko Kuromatsu
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Toshihisa Matsuzaki
- Department of Gastroenterology, Sasebo City General Hospital, Sasebo, Nagasaki, Japan
| | - Tomoyuki Suehiro
- Clinical Research Center, National Hospital Organization Nagasaki Medical Center, Omura, Nagasaki, Japan
| | - Yoshihiro Kamada
- Department of Advanced Metabolic Hepatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yoshio Sumida
- Graduate School of Healthcare Management, International University of Healthcare and Welfare, Tokyo, Japan
| | - Yoichi Hiasa
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Toon, Ehime, 791-0295, Japan
| | - Hidenori Toyoda
- Department of Gastroenterology, Ogaki Municipal Hospital, Ogaki, Japan
| | - Takashi Kumada
- Department of Nursing, Faculty of Nursing, Gifu Kyoritsu University, Ogaki, Japan
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12
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Bitker L, Noirot I, Chauvelot L, Mezidi M, Dhelft F, Gaillet M, Yonis H, Deniel G, Richard JC. Bias, trending ability and diagnostic performance of a non-calibrated multi-beat analysis continuous cardiac output monitor to identify fluid responsiveness in critically ill patients. CRIT CARE RESUSC 2024; 26:108-115. [PMID: 39072233 PMCID: PMC11282375 DOI: 10.1016/j.ccrj.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/26/2024] [Accepted: 04/28/2024] [Indexed: 07/30/2024]
Abstract
Objective To evaluate the accuracy of non-calibrated multi-beat analysis continuous cardiac output (CCOMBA), against calibrated pulse-contour analysis continuous cardiac output (CCOPCA) during a passive leg raise (PLR) and/or a fluid challenge (FC). Design Observational, single-centre, prospective study. Setting Tertiary academic medical intensive care unit, Lyon, France. Participants Adult patients receiving norepinephrine, monitored by CCOPCA, and in which a PLR and/or a FC was indicated. Main outcome measures CCOMBA and CCOPCA were recorded prior to and during the PLR/FC to evaluate bias and evaluate changes in CCOMBA and CCOPCA (∆%CCOMBA and ∆%CCOPCA). Fluid responsiveness was identified by an increase >15% in calibrated cardiac output after FC, to identify the optimal ∆%CCOMBA threshold during PLR to predict fluid responsiveness. Results 29 patients (median age 68 [IQR: 57-74]) performed 28 PLR and 16 FC. The bias between methods increased with higher CCOPCA values, with a percentage error of 64% (95%confidence interval: 52%-77%). ∆%CCOMBA adequately tracked changes in ∆%CCOPCA with an angular bias of 2 ± 29°. ∆%CCOMBA during PLR had an AUROC of 0.92 (P < 0.05), with an optimal threshold >14% to predict fluid responsiveness (sensitivity: 0.99, specificity: 0.87). Conclusions CCOMBA showed a non-constant bias and a percentage error >30% against calibrated CCOPCA, but an adequate ability to track changes in CCOPCA and to predict fluid responsiveness.
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Affiliation(s)
- Laurent Bitker
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
- Univ Lyon, Université Claude Bernard Lyon 1, INSA-Lyon, CNRS, INSERM, CREATIS UMR 5220, U1294, Villeurbanne, France
- Université de Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
| | - Inès Noirot
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Louis Chauvelot
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Mehdi Mezidi
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - François Dhelft
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Maxime Gaillet
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
| | - Hodane Yonis
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Guillaume Deniel
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
- Univ Lyon, Université Claude Bernard Lyon 1, INSA-Lyon, CNRS, INSERM, CREATIS UMR 5220, U1294, Villeurbanne, France
- Université de Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
| | - Jean-Christophe Richard
- Service de Médecine Intensive – Réanimation, Hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
- Univ Lyon, Université Claude Bernard Lyon 1, INSA-Lyon, CNRS, INSERM, CREATIS UMR 5220, U1294, Villeurbanne, France
- Université de Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
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13
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Shiraishi T, Matsuki Y, Yamazaki Y, Shigemi K. Comparison of Left Ventricular End-Diastolic Volume Approximated from Mean Blood Pressure and Stroke Volume and End-Diastolic Volume Calculated from Left Ventricular-Aortic Coupling. J Clin Med 2024; 13:3204. [PMID: 38892915 PMCID: PMC11172842 DOI: 10.3390/jcm13113204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/23/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024] Open
Abstract
Objectives: The purpose of this study was to compare left ventricular end-diastolic volume (EDV), derived from left ventricular arterial coupling (Ees/Ea), and mean arterial blood pressure. Both of these methods of measuring EDV require some invasive procedure. However, the method of measuring EDV approximate is less invasive than the EDV coupling measuring method. This is because EDV approximate only requires arterial pressure waveform as an invasive procedure. Methods: This study included 14 patients with normal cardiac function who underwent general anesthesia. The point when blood pressure stabilized after the induction of anesthesia was taken as a baseline according to the study protocol. At the point when systolic arterial blood pressure fell 10% or more from the baseline blood pressure, 300 mL of colloid solution was administered over 15 min. EDV approximate and EDV coupling were calculated for each of the 14 patients at three points during the course of anesthetic. Each value was obtained by calculating a 5 min average. The timing of these three points was 5 min before, 5 min during, and 5 min after infusion loading. Results: The total number of comparable points was 42; 3 points were taken from each of the 14 participants. Both EDV approximate and EDV coupling increased through the infusion load testing. Scatter plots were prepared, and regression lines were calculated from the obtained values. A high correlation was shown between EDV approximate and EDV coupling (R2 = 0.96, p < 0.05). Conclusions: In patients with good cardiac function, EDV approximate can be substituted for EDV coupling, suggesting the possibility that EDV can be continuously and less invasively calculated under the situation of general anesthesia.
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Affiliation(s)
| | - Yuka Matsuki
- Department of Anesthesiology and Reanimatology, University of Fukui Hospital, Fukui 910-1193, Japan; (T.S.)
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14
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Stäuber A, Hoppe MW, Lapp H, Richter S, Ohlow MA, Dörr M, Piper C, Eckert S, Coll- Barroso MT, Stäuber F, Abanador-Kamper N, Baulmann J. Comparison of cardiac output estimates obtained from the Antares oscillometric pulse wave analysis algorithm and from Doppler transthoracic echocardiography. PLoS One 2024; 19:e0302793. [PMID: 38739601 PMCID: PMC11090340 DOI: 10.1371/journal.pone.0302793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 04/12/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND In cardiology, cardiac output (CO) is an important parameter for assessing cardiac function. While invasive thermodilution procedures are the gold standard for CO assessment, transthoracic Doppler echocardiography (TTE) has become the established method for routine CO assessment in daily clinical practice. However, a demand persists for non-invasive approaches, including oscillometric pulse wave analysis (PWA), to enhance the accuracy of CO estimation, reduce complications associated with invasive procedures, and facilitate its application in non-intensive care settings. Here, we aimed to compare the TTE and oscillometric PWA algorithm Antares for a non-invasive estimation of CO. METHODS Non-invasive CO data obtained by two-dimensional TTE were compared with those from an oscillometric blood pressure device (custo med GmbH, Ottobrunn, Germany) using the integrated algorithm Antares (Redwave Medical GmbH, Jena, Germany). In total, 59 patients undergoing elective cardiac catheterization for clinical reasons (71±10 years old, 76% males) were included. Agreement between both CO measures were assessed by Bland-Altman analysis, Student's t-test, and Pearson correlations. RESULTS The mean difference in CO was 0.04 ± 1.03 l/min (95% confidence interval for the mean difference: -0.23 to 0.30 l/min) for the overall group, with lower and upper limits of agreement at -1.98 and 2.05 l/min, respectively. There was no statistically significant difference in means between both CO measures (P = 0.785). Statistically significant correlations between TTE and Antares CO were observed in the entire cohort (r = 0.705, P<0.001) as well as in female (r = 0.802, P<0.001) and male patients (r = 0.669, P<0.001). CONCLUSIONS The oscillometric PWA algorithm Antares and established TTE for a non-invasive estimation of CO are highly correlated in male and female patients, with no statistically significant difference between both approaches. Future validation studies of the Antares CO are necessary before a clinical application can be considered.
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Affiliation(s)
- Alexander Stäuber
- Department of Movement and Training Science, Leipzig University, Leipzig, Germany
| | | | - Harald Lapp
- Department of Cardiology, Zentralklinik Bad Berka GmbH, Bad Berka, Germany
| | - Stefan Richter
- Department of Cardiology, SRH Klinikum Burgenlandkreis GmbH, Naumburg, Germany
| | | | - Marcus Dörr
- Department of Internal Medicine B, University Medicine Greifswald, Greifswald, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Greifswald, Greifswald, Germany
| | - Cornelia Piper
- Clinic for General and Interventional Cardiology/Angiology, Heart and Diabetes Center North Rhine-Westphalia, Bad Oeynhausen, Germany
| | - Siegfried Eckert
- Clinic for General and Interventional Cardiology/Angiology, Heart and Diabetes Center North Rhine-Westphalia, Bad Oeynhausen, Germany
| | | | - Franziska Stäuber
- Department of Sports Medicine, Chemnitz University of Technology, Chemnitz, Germany
| | - Nadine Abanador-Kamper
- Department of Cardiology, HELIOS University Hospital Witten/Herdecke, Wuppertal, Germany
- Center for Clinical Medicine, Witten/Herdecke University, Wuppertal, Germany
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15
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Berger D, Stanger EJ, Jenni H, Fried PD, Bachmann KF. Modified Thermodilution for Simultaneous Cardiac Output and Recirculation Assessment in Veno-venous Extracorporeal Membrane Oxygenation: A Prospective Diagnostic Accuracy Study. Anesthesiology 2024; 140:1002-1015. [PMID: 38157435 DOI: 10.1097/aln.0000000000004895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
BACKGROUND Thermodilution is unreliable in veno-venous extracorporeal membrane oxygenation (VV-ECMO). Systemic oxygenation depends on recirculation fractions and ratios of extracorporeal membrane oxygenation (ECMO) flow to cardiac output. In a prospective in vitro simulation, this study assessed the diagnostic accuracy of a modified thermodilution technique for recirculation and cardiac output. The hypothesis was that this method provided clinically acceptable precision and accuracy for cardiac output and recirculation. METHODS Two ECMO circuits ran in parallel: one representing a VV-ECMO and the second representing native heart, lung, and circulation. Both circuits shared the right atrium. Extra limbs for recirculation and pulmonary shunt were added. This study simulated ECMO flows from 1 to 2.5 l/min and cardiac outputs from 2.5 to 3.5 l/min with recirculation fractions (0 to 80%) and pulmonary shunts. Thermistors in both ECMO limbs and the pulmonary artery measured the temperature changes induced by cold bolus injections into the arterial ECMO limb. Recirculation fractions were calculated from the ratio of the areas under the temperature curve (AUCs) in the ECMO limbs and from partitioning of the bolus volume (flow based). With known partitioning of bolus volumes between ECMO and pulmonary artery, cardiac output was calculated. High-precision ultrasonic flow probes served as reference for Bland-Altman plots and linear mixed-effect models. RESULTS Accuracy and precision for both the recirculation fraction based on AUC (bias, -5.4%; limits of agreement, -18.6 to 7.9%) and flow based (bias, -5.9%; limits of agreement, -18.8 to 7.0%) are clinically acceptable. Calculated cardiac output for all recirculation fractions was accurate but imprecise (RecirculationAUC: bias 0.56 l/min; limits of agreement, -2.27 to 3.4 l/min; and RecirculationFLOW: bias 0.48 l/min; limits of agreement, -2.22 to 3.19 l/min). Recirculation fraction increased bias and decreased precision. CONCLUSIONS Adapted thermodilution for VV-ECMO allows simultaneous measurement of recirculation fraction and cardiac output and may help optimize patient management with severe respiratory failure. EDITOR’S PERSPECTIVE
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Affiliation(s)
- David Berger
- Department of Intensive Care Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Elia J Stanger
- Department of Intensive Care Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Hansjörg Jenni
- Department of Cardiovascular Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Philipp D Fried
- Department of Intensive Care Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Kaspar F Bachmann
- Department of Intensive Care Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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16
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Seymore KD, Corrigan P, Sigurðsson HB, Pohlig RT, Grävare Silbernagel K. Asymmetric running is associated with pain during outdoor running in individuals with Achilles tendinopathy in the return-to-sport phase. Phys Ther Sport 2024; 67:25-30. [PMID: 38460486 PMCID: PMC11162939 DOI: 10.1016/j.ptsp.2024.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 03/11/2024]
Abstract
OBJECTIVES To determine the relationships between (1) Achilles tendon pain and loading symmetry, and (2) number of running bouts and symptom severity, during two weeks of outdoor running in individuals with Achilles tendinopathy. DESIGN Prospective, observational study. SETTING Biomechanics laboratory and outdoors. PARTICIPANTS Seventeen runners with Achilles tendinopathy in the return-to-sport phase of rehabilitation. MAIN OUTCOME MEASURES Symptom severity was recorded with the Victorian Institute of Sports Assessment-Achilles (VISA-A) questionnaire. Running bouts and Achilles tendon pain during runs were recorded with daily training logs. Ground contact time was collected during runs with wearable sensors. Linear mixed modeling determined if the relationship between Achilles tendon pain and ground contact time symmetry during running was moderated by consecutive run days. Multiple regression determined the relationship between number of running bouts and change in VISA-A scores over two weeks, adjusted for run distance. RESULTS Greater ground contact time on the contralateral leg corresponded to increased ipsilateral tendon pain for each consecutive run day (b = -0.028, p < 0.001). Number of running bouts was not associated with 2-week changes in VISA-A scores (p = 0.672). CONCLUSIONS Pain during running is associated with injured leg off-loading patterns, and this relationship strengthened with greater number of consecutive run days. Number of running bouts was not related to short-term symptom severity.
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Affiliation(s)
- Kayla D Seymore
- Department of Physical Therapy, University of Delaware, Newark, DE, USA
| | - Patrick Corrigan
- Department of Physical Therapy and Athletic Training, Saint Louis University, St. Louis, MO, USA
| | | | - Ryan T Pohlig
- Department of Epidemiology, University of Delaware, Newark, DE, USA
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17
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Tholén M, Lannemyr L, Møller-Sørensen H, Ricksten SE. Serum creatinine is an unreliable marker of renal function in patients undergoing heart transplantation. Acta Anaesthesiol Scand 2024; 68:619-625. [PMID: 38411237 DOI: 10.1111/aas.14397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 02/02/2024] [Accepted: 02/12/2024] [Indexed: 02/28/2024]
Abstract
BACKGROUND Renal dysfunction is a common complication after heart transplantation (Htx). Glomerular filtration rate (GFR) can be assessed by various estimating equations (eGFR). We evaluated the correlation, agreement, and accuracy between eGFR and mGFR and the ability of eGFR to track changes in mGFR early after Htx. METHODS A single-center prospective observational study on 55 patients undergoing Htx. Serum creatinine and mGFR (plasma clearance of Cr51-EDTA or iohexol) were measured preoperatively and on the fourth postoperative day. The accuracy of eGFR to predict true mGFR was calculated as the percentage of patients with an eGFR within 30% of mGFR (P30). The agreement between eGFR and mGFR was assessed according to Bland and Altman. A four-quadrant plot was made to evaluate the ability of eGFR to track changes in mGFR. RESULTS The accuracy of eGFR to assess mGFR was 52%. The bias was 11.2 ± 17.4 mL/min/1.72 m2. The limits of agreement were -23.0 to 45.4 mL/min/1.72 m2 and the error 58%. The concordance rate between eGFR and mGFR was 72%. CONCLUSIONS eGFR underestimated mGFR and the agreement between eGFR and mGFR was low with an unacceptably large between-group error and low accuracy. Furthermore, the ability of eGFR to assess changes in mGFR, postoperatively, was poor. Thus, the use of estimating equations from serum creatinine will not adequately assess renal function early after major heart surgery. To gain adequate information on renal function early after Htx, GFR needs to be measured, not estimated.
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Affiliation(s)
- Maria Tholén
- Department of Anesthesiology and Intensive Care Medicine, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Lukas Lannemyr
- Department of Anesthesiology and Intensive Care Medicine, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Hasse Møller-Sørensen
- Department of Cardiothoracic Anesthesiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Sven-Erik Ricksten
- Department of Anesthesiology and Intensive Care Medicine, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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18
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Kwon HJ, Heo J, Park SH, Park SW, Byon I. Accuracy of generative deep learning model for macular anatomy prediction from optical coherence tomography images in macular hole surgery. Sci Rep 2024; 14:6913. [PMID: 38519532 PMCID: PMC10959933 DOI: 10.1038/s41598-024-57562-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 03/19/2024] [Indexed: 03/25/2024] Open
Abstract
This study aims to propose a generative deep learning model (GDLM) based on a variational autoencoder that predicts macular optical coherence tomography (OCT) images following full-thickness macular hole (FTMH) surgery and evaluate its clinical accuracy. Preoperative and 6-month postoperative swept-source OCT data were collected from 150 patients with successfully closed FTMH using 6 × 6 mm2 macular volume scan datasets. Randomly selected and augmented 120,000 training and 5000 validation pairs of OCT images were used to train the GDLM. We assessed the accuracy and F1 score of concordance for neurosensory retinal areas, performed Bland-Altman analysis of foveolar height (FH) and mean foveal thickness (MFT), and predicted postoperative external limiting membrane (ELM) and ellipsoid zone (EZ) restoration accuracy between artificial intelligence (AI)-OCT and ground truth (GT)-OCT images. Accuracy and F1 scores were 94.7% and 0.891, respectively. Average FH (228.2 vs. 233.4 μm, P = 0.587) and MFT (271.4 vs. 273.3 μm, P = 0.819) were similar between AI- and GT-OCT images, within 30.0% differences of 95% limits of agreement. ELM and EZ recovery prediction accuracy was 88.0% and 92.0%, respectively. The proposed GDLM accurately predicted macular OCT images following FTMH surgery, aiding patient and surgeon understanding of postoperative macular features.
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Affiliation(s)
- Han Jo Kwon
- Department of Ophthalmology, Biomedical Research Institute, Pusan National University Hospital, Pusan National University School of Medicine, Gudeok-ro 179, Seo-gu, Busan, 49241, South Korea
| | - Jun Heo
- Department of Ophthalmology, Biomedical Research Institute, Pusan National University Hospital, Pusan National University School of Medicine, Gudeok-ro 179, Seo-gu, Busan, 49241, South Korea
| | - Su Hwan Park
- Department of Ophthalmology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Geumo-ro 20, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do, 50612, South Korea
| | - Sung Who Park
- Department of Ophthalmology, Biomedical Research Institute, Pusan National University Hospital, Pusan National University School of Medicine, Gudeok-ro 179, Seo-gu, Busan, 49241, South Korea
| | - Iksoo Byon
- Department of Ophthalmology, Biomedical Research Institute, Pusan National University Hospital, Pusan National University School of Medicine, Gudeok-ro 179, Seo-gu, Busan, 49241, South Korea.
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Wu NH, Hsieh TH, Chang CY, Lin HY. Impact of the intra-aortic balloon pump on the reliability of the fourth-generation FloTrac/EV1000 system in patients undergoing robotic-assisted off-pump coronary artery bypass surgery. Heart Vessels 2024; 39:275-276. [PMID: 38085332 DOI: 10.1007/s00380-023-02347-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Accepted: 11/29/2023] [Indexed: 02/10/2024]
Affiliation(s)
- Nien-Hsun Wu
- Department of Anesthesiology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan
| | - Tsung-Han Hsieh
- Department of Research, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan
| | - Chun-Yu Chang
- Department of Anesthesiology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan
| | - Han-Yu Lin
- Department of Anesthesiology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan.
- School of Medicine, Tzu Chi University, Hualien, Taiwan.
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20
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Yoon SB, Jung CW, Kim T, Lee HC. Effect of hyperbilirubinemia on the accuracy of continuous non-invasive hemoglobin measurements in liver transplantation recipients. Sci Rep 2024; 14:5072. [PMID: 38429444 PMCID: PMC10907682 DOI: 10.1038/s41598-024-55837-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 02/28/2024] [Indexed: 03/03/2024] Open
Abstract
This study evaluated the effect of hyperbilirubinemia on the accuracy of continuous non-invasive hemoglobin (SpHb) measurements in liver transplantation recipients. Overall, 1465 SpHb and laboratory hemoglobin (Hb) measurement pairs (n = 296 patients) were analyzed. Patients were grouped into normal (< 1.2 mg/dL), mild-to-moderate (1.2-3.0 mg/dL), and severe (> 3.0 mg/dL) hyperbilirubinemia groups based on the preoperative serum total bilirubin levels. Bland-Altman analysis showed a bias of 0.20 (95% limit of agreement, LoA: - 2.59 to 3.00) g/dL, 0.98 (95% LoA: - 1.38 to 3.35) g/dL, and 1.23 (95% LoA: - 1.16 to 3.63) g/dL for the normal, mild-to-moderate, and severe groups, respectively. The four-quadrant plot showed reliable trending ability in all groups (concordance rate > 92%). The rates of possible missed transfusion (SpHb > 7.0 g/dL for Hb < 7.0 g/dL) were higher in the hyperbilirubinemia groups (2%, 7%, and 12% for the normal, mild-to-moderate, and severe group, respectively. all P < 0.001). The possible over-transfusion rate was less than 1% in all groups. In conclusion, the use of SpHb in liver transplantation recipients with preoperative hyperbilirubinemia requires caution due to the positive bias and high risk of missed transfusion. However, the reliable trending ability indicated its potential use in clinical settings.
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Affiliation(s)
- Soo Bin Yoon
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Chul-Woo Jung
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Taeyup Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Hyung-Chul Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
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21
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Vetrugno L, Deana C, Barbariol F. Can arterial shape change with IABP play a role in comparing FlowTrac/EV 1000 vs. pulmonary cardiac output? Heart Vessels 2024; 39:273-274. [PMID: 38085331 DOI: 10.1007/s00380-023-02346-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 11/29/2023] [Indexed: 02/10/2024]
Affiliation(s)
- Luigi Vetrugno
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy.
- Department of Anesthesiology, Critical Care Medicine and Emergency, SS. Annunziata Hospital, Via Dei Vestini 33, 66100, Chieti, Italy.
| | - Cristian Deana
- Anesthesia and Intensive Care 1, Department of Anesthesia and Intensive Care, Health Integrated Agency of Friuli Centrale, Udine, Italy
| | - Federico Barbariol
- Anesthesia and Intensive Care 1, Department of Anesthesia and Intensive Care, Health Integrated Agency of Friuli Centrale, Udine, Italy
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22
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Florio KL, Williams EM, White D, Daming T, Hostetter S, Schrufer-Poland T, Gray R, Schmidt L, Grodzinsky A, Lee J, Rader V, Swearingen K, Nelson L, Patel N, Magalski A, Gosch K, Jones P, Fu Z, Spertus JA. Validation of a noninvasive cardiac output monitor in maternal cardiac disease: comparison of NICOM and transthoracic echocardiogram. Am J Obstet Gynecol MFM 2024; 6:101312. [PMID: 38342307 DOI: 10.1016/j.ajogmf.2024.101312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/01/2024] [Accepted: 02/05/2024] [Indexed: 02/13/2024]
Abstract
BACKGROUND The physiological changes to the cardiovascular system during pregnancy are considerable and are more pronounced in those with cardiac disease. In the general population, noninvasive hemodynamic monitoring is a valid alternative to pulmonary artery catheterization, which poses risk in the pregnant population. There is limited data on noninvasive cardiac output monitoring in pregnancy as an alternative to pulmonary artery catheterization. OBJECTIVE We sought to compare transthoracic echocardiography with a noninvasive cardiac output monitor (NICOM, Cheetah Medical) in pregnant patients with and without cardiac disease. STUDY DESIGN This was a prospective, open-label validation study that compared 2-dimensional transthoracic echocardiography with NICOM estimations of cardiac output in each trimester of pregnancy and the postpartum period. Participants with and without cardiac disease with a singleton gestation were included. NICOM estimations of cardiac output were derived from thoracic bioreactance and compared with 2-dimensional transthoracic echocardiography for both precision and accuracy. A mean percentage difference of ±30% between the 2 devices was considered acceptable agreement between the 2 measurement techniques. RESULTS A total of 58 subjects were enrolled; 36 did not have cardiac disease and 22 had cardiac disease. Heart rate measurements between the 2 devices were strongly correlated in both groups, whereas stroke volume and cardiac output measurements showed weak correlation. When comparing the techniques, the NICOM device overestimated cardiac output in the control group in all trimesters and the postpartum period (mean percentage differences were 50.3%, 52.7%, 48.1%, and 51.0% in the first, second, and third trimesters and the postpartum period, respectively). In the group with cardiac disease, the mean percentage differences were 31.9%, 29.7%, 19.6%, and 35.2% for the respective timepoints. CONCLUSION The NICOM device consistently overestimated cardiac output when compared with 2-dimensional transthoracic echocardiography at all timepoints in the control group and in the first trimester and postpartum period for the cardiovascular disease group. The physiological changes of pregnancy, specifically the mean chest circumference and total body water, may alter the accuracy of the cardiac output measurement by the NICOM device as they are currently estimated. Although NICOM has been validated for use in the critical care setting, there is insufficient data to support its use in pregnancy.
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Affiliation(s)
- Karen L Florio
- Department of Obstetrics and Gynecology, University of Missouri, Columbia MO (Dr Florio); Department of Obstetrics and Gynecology, University of Missouri-Kansas City, Kansas City, MO (Drs Florio, Williams, Daming, Hostetter, Schrufer-Poland, and Patel); Division of Women's and Children's, Saint Luke's Hospital of Kansas City, Kansas City, MO (Dr Florio, Ms White, Ms Gray, Ms Swearingen, and Ms Nelson).
| | - Emily M Williams
- Department of Obstetrics and Gynecology, University of Missouri-Kansas City, Kansas City, MO (Drs Florio, Williams, Daming, Hostetter, Schrufer-Poland, and Patel)
| | - Darcy White
- Division of Women's and Children's, Saint Luke's Hospital of Kansas City, Kansas City, MO (Dr Florio, Ms White, Ms Gray, Ms Swearingen, and Ms Nelson)
| | - Tara Daming
- Department of Obstetrics and Gynecology, University of Missouri-Kansas City, Kansas City, MO (Drs Florio, Williams, Daming, Hostetter, Schrufer-Poland, and Patel); Department of Maternal-Fetal Medicine, Mercy Hospital of Saint Louis, Saint Louis, MO (Dr Daming)
| | - Sarah Hostetter
- Department of Obstetrics and Gynecology, University of Missouri-Kansas City, Kansas City, MO (Drs Florio, Williams, Daming, Hostetter, Schrufer-Poland, and Patel); Department of Maternal Fetal Medicine, Mercy Hospital of Springfield, Springfield, MO (Dr Hostetter)
| | - Tabitha Schrufer-Poland
- Department of Obstetrics and Gynecology, University of Missouri-Kansas City, Kansas City, MO (Drs Florio, Williams, Daming, Hostetter, Schrufer-Poland, and Patel); AdventHealth High Risk Pregnancy Consultants, Orlando, FL (Dr Schrufer-Poland)
| | - Rebecca Gray
- Division of Women's and Children's, Saint Luke's Hospital of Kansas City, Kansas City, MO (Dr Florio, Ms White, Ms Gray, Ms Swearingen, and Ms Nelson)
| | - Laura Schmidt
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus); Department of Cardiology, University of Missouri-Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, Magalski, and Spertus)
| | - Anna Grodzinsky
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus); Department of Cardiology, University of Missouri-Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, Magalski, and Spertus)
| | - John Lee
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus); Department of Cardiology, University of Missouri-Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, Magalski, and Spertus)
| | - Valerie Rader
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus); Department of Cardiology, University of Missouri-Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, Magalski, and Spertus)
| | - Kathleen Swearingen
- Division of Women's and Children's, Saint Luke's Hospital of Kansas City, Kansas City, MO (Dr Florio, Ms White, Ms Gray, Ms Swearingen, and Ms Nelson)
| | - Lynne Nelson
- Division of Women's and Children's, Saint Luke's Hospital of Kansas City, Kansas City, MO (Dr Florio, Ms White, Ms Gray, Ms Swearingen, and Ms Nelson)
| | - Neil Patel
- Department of Obstetrics and Gynecology, University of Missouri-Kansas City, Kansas City, MO (Drs Florio, Williams, Daming, Hostetter, Schrufer-Poland, and Patel); Department of Obstetrics and Gynecology, University of Kentucky, Lexington KY (Dr Patel)
| | - Anthony Magalski
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus); Department of Cardiology, University of Missouri-Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, Magalski, and Spertus)
| | - Kensey Gosch
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus)
| | - Philip Jones
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus)
| | - Zhuxuan Fu
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus)
| | - John A Spertus
- Mid-America Heart Institute, Saint Luke's Hospital of Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, and Magalski, Ms Gosch, Mr Jones, and Drs Fu and Spertus); Department of Cardiology, University of Missouri-Kansas City, Kansas City, MO (Drs Schmidt, Grodzinsky, Lee, Rader, Magalski, and Spertus)
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23
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Chung CR, Ko RE, Jang GY, Lee K, Suh GY, Kim Y, Woo EJ. Comparison of noninvasive cardiac output and stroke volume measurements using electrical impedance tomography with invasive methods in a swine model. Sci Rep 2024; 14:2962. [PMID: 38316842 PMCID: PMC10844629 DOI: 10.1038/s41598-024-53488-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 02/01/2024] [Indexed: 02/07/2024] Open
Abstract
Pulmonary artery catheterization (PAC) has been used as a clinical standard for cardiac output (CO) measurements on humans. On animals, however, an ultrasonic flow sensor (UFS) placed around the ascending aorta or pulmonary artery can measure CO and stroke volume (SV) more accurately. The objective of this paper is to compare CO and SV measurements using a noninvasive electrical impedance tomography (EIT) device and three invasive devices using UFS, PAC-CCO (continuous CO) and arterial pressure-based CO (APCO). Thirty-two pigs were anesthetized and mechanically ventilated. A UFS was placed around the pulmonary artery through thoracotomy in 11 of them, while the EIT, PAC-CCO and APCO devices were used on all of them. Afterload and contractility were changed pharmacologically, while preload was changed through bleeding and injection of fluid or blood. Twenty-three pigs completed the experiment. Among 23, the UFS was used on 7 pigs around the pulmonary artery. The percentage error (PE) between COUFS and COEIT was 26.1%, and the 10-min concordance was 92.5%. Between SVUFS and SVEIT, the PE was 24.8%, and the 10-min concordance was 94.2%. On analyzing the data from all 23 pigs, the PE between time-delay-adjusted COPAC-CCO and COEIT was 34.6%, and the 10-min concordance was 81.1%. Our results suggest that the performance of the EIT device in measuring dynamic changes of CO and SV on mechanically-ventilated pigs under different cardiac preload, afterload and contractility conditions is at least comparable to that of the PAC-CCO device. Clinical studies are needed to evaluate the utility of the EIT device as a noninvasive hemodynamic monitoring tool.
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Affiliation(s)
- Chi Ryang Chung
- Department of Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Ryoung Eun Ko
- Department of Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Geuk Young Jang
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Korea
| | - Kyounghun Lee
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Korea
| | - Gee Young Suh
- Department of Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yongmin Kim
- Department of Convergence IT Engineering, POSTECH, Pohang, Korea
| | - Eung Je Woo
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Korea.
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24
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Oh C, Lee HC, Lee S, Shim MS, Yoon SB, Jung J, Yoon SH, Kim YH, Ko Y, Hong B, Ku Y. Continuous cardiac output estimation using a new modified Fick method during off-pump coronary artery bypass graft surgery: a retrospective observational study. J Anesth 2024; 38:1-9. [PMID: 37740733 DOI: 10.1007/s00540-023-03260-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 09/07/2023] [Indexed: 09/25/2023]
Abstract
PURPOSE Several technical aspects of the Fick method limit its use intraoperatively. A data-driven modification of the Fick method may enable its use in intraoperative settings. METHODS This two-center retrospective observational study included 57 (28 and 29 in each center) patients who underwent off-pump coronary artery bypass graft (OPCAB) surgery. Intraoperative recordings of physiological data were obtained and divided into training and test datasets. The Fick equation was used to calculate cardiac output (CO-Fick) using ventilator-determined variables, intraoperative hemoglobin level, and SvO2, with continuous thermodilution cardiac output (CCO) used as a reference. A modification CO-Fick was derived and validated: CO-Fick-AD, which adjusts the denominator of the original equation. RESULTS Increased deviation between CO-Fick and CCO was observed when oxygen extraction was low. The root mean square error of CO-Fick was decreased from 6.07 L/min to 0.70 L/min after the modification. CO-Fick-AD showed a mean bias of 0.17 (95% CI 0.00-0.34) L/min, with a 36.4% (95% CI 30.6-44.4%) error. The concordance rates of CO-Fick-AD ranged from 73.3 to 87.1% depending on the time interval and exclusion zone. CONCLUSIONS The original Fick method is not reliable when oxygen extraction is low, but a modification using data-driven approach could enable continuous estimation of cardiac output during the dynamic intraoperative period with minimal bias. However, further improvements in precision and trending ability are needed.
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Affiliation(s)
- Chahyun Oh
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Korea
- Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Hyung-Chul Lee
- Department of Anesthesiology and Pain Medicine Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea
| | - Soomin Lee
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Korea
- Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Man-Shik Shim
- Department of Thoracic & Cardiovascular Surgery, Chungnam National University Hospital, Daejeon, Korea
| | - Soo Bin Yoon
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea
| | - Jinsik Jung
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Korea
| | - Seok-Hwa Yoon
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Korea
- Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Yoon-Hee Kim
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Korea
- Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Youngkwon Ko
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Korea
- Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Boohwi Hong
- Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon, Korea
- Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Korea
- Big Data Center, Biomedical Research Institute, Chungnam National University Hospital, Daejeon, Korea
| | - Yunseo Ku
- Department of Biomedical Engineering, Chungnam National University College of Medicine, 266 Munhwa-Ro(St), Jung-Gu, Daejeon, 35015, Korea.
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25
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Kandil S, Sedra A. Hemodynamic monitoring in liver transplantation 'the hemodynamic system'. Curr Opin Organ Transplant 2024; 29:72-81. [PMID: 38032246 DOI: 10.1097/mot.0000000000001125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
PURPOSE OF REVIEW The purpose of this article is to provide a comprehensive review of hemodynamic monitoring in liver transplantation. RECENT FINDINGS Radial arterial blood pressure monitoring underestimates the aortic root arterial blood pressure and causes excessive vasopressor and worse outcomes. Brachial and femoral artery monitoring is well tolerated and should be considered in critically ill patients expected to be on high dose pressors. The pulmonary artery catheter is the gold standard of hemodynamic monitoring and is still widely used in liver transplantation; however, it is a highly invasive monitor with potential for serious complications and most of its data can be obtained by other less invasive monitors. Rescue transesophageal echocardiography relies on few simple views and should be available as a standby to manage sudden hemodynamic instability. Risk of esophageal bleeding from transesophageal echocardiography in liver transplantation is the same as in other patient populations. The arterial pulse waveform analysis based cardiac output devices are minimally invasive and have the advantage of real-time beat to beat monitoring of cardiac output. No hemodynamic monitor can improve clinical outcomes unless integrated into a goal-directed hemodynamic therapy. The hemodynamic monitoring technique should be tailored to the patient's medical status, surgical technique, and the anesthesiologist's level of expertise. SUMMARY The current article provides a review of the current hemodynamic monitoring systems and their integration in goal-directed hemodynamic therapy.
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Affiliation(s)
- Sherif Kandil
- Department of Anesthesiology, Keck Medical School of USC, Los Angeles, California, USA
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26
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Khanna AK, Garcia JO, Saha AK, Harris L, Baruch M, Martin RS. Agreement between cardiac output estimation with a wireless, wearable pulse decomposition analysis device and continuous thermodilution in post cardiac surgery intensive care unit patients. J Clin Monit Comput 2024; 38:139-146. [PMID: 37458916 DOI: 10.1007/s10877-023-01059-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 07/07/2023] [Indexed: 02/21/2024]
Abstract
PURPOSE Pulse Decomposition Analysis (PDA) uses integration of the systolic area of a distally transmitted aortic pulse as well as arterial stiffness estimates to compute cardiac output. We sought to assess agreement of cardiac output (CO) estimation between continuous pulmonary artery catheter (PAC) guided thermodilution (CO-CCO) and a wireless, wearable noninvasive device, (Vitalstream, Caretaker Medical, Charlottesville, VA), that utilizes the Pulse Decomposition Analysis (CO-PDA) method in postoperative cardiac surgery patients in the intensive care unit. METHODS CO-CCO measurements were compared with post processed CO-PDA measurements in prospectively enrolled adult cardiac surgical intensive care unit patients. Uncalibrated CO-PDA values were compared for accuracy with CO-CCO via a Bland-Altman analysis considering repeated measurements and a concordance analysis with a 10% exclusion zone. RESULTS 259.7 h of monitoring data from 41 patients matching 15,583 data points were analyzed. Mean CO-CCO was 5.55 L/min, while mean values for the CO-PDA were 5.73 L/min (mean of differences +- SD 0.79 ± 1.11 L/min; limits of agreement - 1.43 to 3.01 L/min), with a percentage error of 37.5%. CO-CCO correlation with CO-PDA was moderate (0.54) and concordance was 0.83. CONCLUSION Compared with the CO-CCO Swan-Ganz, cardiac output measurements obtained using the CO-PDA were not interchangeable when using a 30% threshold. These preliminary results were within the 45% limits for minimally invasive devices, and pending further robust trials, the CO-PDA offers a noninvasive, wireless solution to complement and extend hemodynamic monitoring within and outside the ICU.
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Affiliation(s)
- Ashish K Khanna
- Department of Anesthesiology, Section on Critical Care Medicine, School of Medicine, Wake Forest University, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem, NC, USA.
- Outcomes Research Consortium, Cleveland, OH, USA.
- Perioperative Outcomes and Informatics Collaborative (POIC), Winston-Salem, NC, USA.
| | - Julio O Garcia
- Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Amit K Saha
- Perioperative Outcomes and Informatics Collaborative (POIC), Winston-Salem, NC, USA
- Department of Anesthesiology, Wake Forest University School of Medicine, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem, NC, USA
| | - Lynnette Harris
- Perioperative Outcomes and Informatics Collaborative (POIC), Winston-Salem, NC, USA
- Department of Anesthesiology, Wake Forest University School of Medicine, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem, NC, USA
| | | | - R Shayn Martin
- Department of Surgery, Wake Forest University School of Medicine, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem, NC, USA
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27
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Reiter T, Kerzner J, Fette G, Frantz S, Voelker W, Ertl G, Bauer W, Morbach C, Störk S, Güder G. Accuracy of VO 2 estimation according to the widely used Krakau formula for the prediction of cardiac output. Herz 2024; 49:50-59. [PMID: 37439804 PMCID: PMC10830659 DOI: 10.1007/s00059-023-05196-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 05/21/2023] [Accepted: 06/01/2023] [Indexed: 07/14/2023]
Abstract
BACKGROUND Invasive cardiac output (CO) is measured with the thermodilution (TD) or the indirect Fick method (iFM) in right heart catheterization (RHC). The iFM estimates CO using approximation formulas for oxygen consumption ([Formula: see text]O2), but there are significant discrepancies (> 20%) between both methods. Although regularly applied, the formula proposed by Krakau has not been validated. We compared the CO discrepancies between the Krakau formula with the reference (TD) and three established formulas and investigated whether alterations assessed in cardiac magnetic resonance imaging (CMR) determined the extent of the deviations. METHODS This retrospective study included 188 patients aged 63 ± 14 years (30% women) receiving both CMR and RHC. The CO was measured with TD or with the iFM using the formulas by Krakau, LaFarge, Dehmer, and Bergstra for [Formula: see text]O2 estimation (iFM-K/-L/-D/-B). Percentage errors were calculated as twice the standard deviation of the difference between two CO methods divided by their means; a cut-off of < 30% was regarded as acceptable. The iFM and TD-derived CO ratio was built, and deviations > 20% were counted. Logistic regression analyses were performed to identify determinants of a deviation of > 20%. RESULTS The TD-derived CO (5.5 ± 1.7 L/min) was significantly different from all iFM (K: 4.8 ± 1.6, L: 4.3 ± 1.6; D: 4.8 ± 1.5 L/min; B: 5.4 ± 1.8 L/min all p < 0.05). The iFM-K-CO differed from all methods (p < 0.001) except iFM‑D (p = 0.19). Percentage errors between TD-CO and iFM-K/-L/-D/-B were all beyond the acceptance limit (44/45/44/43%), while percentage errors between iFM‑K and other iFM were all < 16%. None of the parameters measured in CMR was predictive of a discrepancy of > 20% between both methods. CONCLUSION The Krakau formula was comparable to other iFM in estimating CO levels, but none showed satisfactory agreement with the TD method. Improved derivation cohorts for [Formula: see text]O2 estimation are needed that better reflect today's patients undergoing RHC.
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Affiliation(s)
- Theresa Reiter
- Department of Internal Medicine I, Cardiology Division, University Hospital Würzburg, Oberdürrbacherstr. 6, 97080, Würzburg, Germany
| | - Julia Kerzner
- Department of Internal Medicine I, Cardiology Division, University Hospital Würzburg, Oberdürrbacherstr. 6, 97080, Würzburg, Germany
| | - Georg Fette
- Department of Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University Hospital Würzburg, Am Schwarzen Berg 26, 97078, Würzburg, Germany
- Chair of Computer Science VI, University of Würzburg, 97074, Würzburg, Germany
| | - Stefan Frantz
- Department of Internal Medicine I, Cardiology Division, University Hospital Würzburg, Oberdürrbacherstr. 6, 97080, Würzburg, Germany
- Department of Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University Hospital Würzburg, Am Schwarzen Berg 26, 97078, Würzburg, Germany
| | - Wolfram Voelker
- Department of Internal Medicine I, Cardiology Division, University Hospital Würzburg, Oberdürrbacherstr. 6, 97080, Würzburg, Germany
| | - Georg Ertl
- Department of Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University Hospital Würzburg, Am Schwarzen Berg 26, 97078, Würzburg, Germany
| | - Wolfgang Bauer
- Department of Internal Medicine I, Cardiology Division, University Hospital Würzburg, Oberdürrbacherstr. 6, 97080, Würzburg, Germany
| | - Caroline Morbach
- Department of Internal Medicine I, Cardiology Division, University Hospital Würzburg, Oberdürrbacherstr. 6, 97080, Würzburg, Germany
- Department of Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University Hospital Würzburg, Am Schwarzen Berg 26, 97078, Würzburg, Germany
| | - Stefan Störk
- Department of Internal Medicine I, Cardiology Division, University Hospital Würzburg, Oberdürrbacherstr. 6, 97080, Würzburg, Germany
- Department of Clinical Research & Epidemiology, Comprehensive Heart Failure Center, University Hospital Würzburg, Am Schwarzen Berg 26, 97078, Würzburg, Germany
| | - Gülmisal Güder
- Department of Internal Medicine I, Cardiology Division, University Hospital Würzburg, Oberdürrbacherstr. 6, 97080, Würzburg, Germany.
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Svensøy JN, Alonso E, Elola A, Bjørnerheim R, Ræder J, Aramendi E, Wik L. Cardiac output estimation using ballistocardiography: a feasibility study in healthy subjects. Sci Rep 2024; 14:1671. [PMID: 38238507 PMCID: PMC10796317 DOI: 10.1038/s41598-024-52300-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 01/16/2024] [Indexed: 01/22/2024] Open
Abstract
There is no reliable automated non-invasive solution for monitoring circulation and guiding treatment in prehospital emergency medicine. Cardiac output (CO) monitoring might provide a solution, but CO monitors are not feasible/practical in the prehospital setting. Non-invasive ballistocardiography (BCG) measures heart contractility and tracks CO changes. This study analyzed the feasibility of estimating CO using morphological features extracted from BCG signals. In 20 healthy subjects ECG, carotid/abdominal BCG, and invasive arterial blood pressure based CO were recorded. BCG signals were adaptively processed to isolate the circulatory component from carotid (CCc) and abdominal (CCa) BCG. Then, 66 features were computed on a beat-to-beat basis to characterize amplitude/duration/area/length of the fluctuation in CCc and CCa. Subjects' data were split into development set (75%) to select the best feature subset with which to build a machine learning model to estimate CO and validation set (25%) to evaluate model's performance. The model showed a mean absolute error, percentage error and 95% limits of agreement of 0.83 L/min, 30.2% and - 2.18-1.89 L/min respectively in the validation set. BCG showed potential to reliably estimate/track CO. This method is a promising first step towards an automated, non-invasive and reliable CO estimator that may be tested in prehospital emergencies.
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Affiliation(s)
- Johannes Nordsteien Svensøy
- Norwegian National Advisory Unit on Prehospital Emergency Medicine (NAKOS), Division of Prehospital Services, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Erik Alonso
- Department of Applied Mathematics, University of the Basque Country (UPV/EHU), Bilbao, Spain.
| | - Andoni Elola
- Department of Electronic Technology, University of the Basque Country (UPV/EHU), Eibar, Spain
| | - Reidar Bjørnerheim
- Division of Internal Medicine, Department of Cardiology, Ullevål Hospital, Oslo, Norway
| | - Johan Ræder
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
- Division of Emergency Medicine, Department of Anestesiology, Ullevål Hospital, Oslo, Norway
| | - Elisabete Aramendi
- Department of Communications Engineering, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Lars Wik
- Norwegian National Advisory Unit on Prehospital Emergency Medicine (NAKOS), Division of Prehospital Services, Oslo University Hospital, Oslo, Norway
- Division of Prehospital Services, Department of Air Ambulance, Ullevål Hospital, Oslo, Norway
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29
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Ullrich P, Hummel M, Hauer K, Bauer JM, Werner C. Validity, Reliability, Responsiveness, and Feasibility of the Life-Space Assessment Administered via Telephone in Community-Dwelling Older Adults. THE GERONTOLOGIST 2024; 64:gnad038. [PMID: 37014063 DOI: 10.1093/geront/gnad038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Indexed: 04/05/2023] Open
Abstract
BACKGROUND AND OBJECTIVES The life-space assessment (LSA) is the most commonly used questionnaire to assess life-space mobility (LSM) in older adults, with well-established psychometric properties for face-to-face (FF) administration. However, these properties have not yet been explicitly studied when the LSA is administered by telephone. The aim of this study was to evaluate the concurrent and construct validity, test-retest reliability, responsiveness, and feasibility of a telephone-based LSA version (TE-LSA) in older adults. RESEARCH DESIGN AND METHODS Fifty community-dwelling older adults (age = 79.3 ± 5.3 years) participated in the study. Concurrent validity was assessed against the FF-LSA construct validity by testing 15 a priori hypotheses on expected associations with LSM determinants, test-retest reliability via 2 telephone surveys 1 week apart, responsiveness after 8.5 ± 1.8 months in participants with improved, stable, and worsened mobility defined by 2 external criteria, and feasibility by the completion rate/time and ceiling/floor effects. RESULTS Good to excellent agreement between the 2 different administration methods was found (intraclass correlation coefficient [ICC2,1] = 0.73-0.98). Twelve of 15 (80%) hypotheses on construct validity were confirmed. ICCs for test-retest reliability were good to excellent (ICC2,1 = 0.62-0.94). Minimal detectable change for the TE-LSA total score was 20 points. Standardized response means were large for worsened (0.88), moderate for improved (0.68), and trivial for stable participants (0.04). Completion rate was 100% and mean completion time was 5.5 ± 3.3 min. No ceiling or floor effects were observed for the TE-LSA total score. DISCUSSION AND IMPLICATIONS Telephone administration of the LSA is valid, reliable, responsive, and feasible for assessing LSM in community-dwelling older adults.
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Affiliation(s)
- Phoebe Ullrich
- Geriatric Centre, Heidelberg University Hospital, Agaplesion Bethanien Hospital Heidelberg, Heidelberg, Germany
| | - Merit Hummel
- Geriatric Centre, Heidelberg University Hospital, Agaplesion Bethanien Hospital Heidelberg, Heidelberg, Germany
| | - Klaus Hauer
- Geriatric Centre, Heidelberg University Hospital, Agaplesion Bethanien Hospital Heidelberg, Heidelberg, Germany
| | - Jürgen M Bauer
- Geriatric Centre, Heidelberg University Hospital, Agaplesion Bethanien Hospital Heidelberg, Heidelberg, Germany
| | - Christian Werner
- Geriatric Centre, Heidelberg University Hospital, Agaplesion Bethanien Hospital Heidelberg, Heidelberg, Germany
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30
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Osovskikh VV, Kiseleva LN, Kolokolnikov IN, Vasilieva MS, Bautin AE. [Analysis of indocyanine green plasma disappearance rate in clinical practice]. Khirurgiia (Mosk) 2024:5-12. [PMID: 38380459 DOI: 10.17116/hirurgia20240225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
OBJECTIVE To justify the optimal method for determining indocyanine green plasma disappearance rate (PDRICG). MATERIAL AND METHODS We analyzed PDRICG in intensive care units. Indocyanine green was administered intravenously at a dose of 0.25 mg/kg. PDRICG was analyzed simultaneously by using of three methods: 1) PDD (PiCCO2 LiMON device), 2) SBS with analysis of plasma samples on precise spectrophotometer, 3) SBS with analysis of plasma samples on simple experimental photometer. RESULTS PDD method was used for 346 PDRICG tests in 256 patients. Of these, 14.3% of measurements were erroneous. Paired tests using PDD and SBS methods were performed in 299 cases. SBS method resulted erroneous data in 0.6% of cases. Certain correlation (r=0.79, p<0.001) was found between the reference method (SBS with spectrophotometry) and the PDD method. Bland-Altman plot for these two methods showed that proportional bias of mean difference was caused by extremely high PDRICG of the PDD method (for example, more than 30%/min). Comparison of two SBS variants (spectrophotometer and experimental photometer) revealed good correlation (r=0.91, p<0.001). CONCLUSION SBS method for measuring PDRICG ensures accurate results under mechanical interferences in patients with impaired capillary blood flow. This eliminates the need for redo measurement. Duplication of the PDD and SBS methods is recommended when repeating the test is not possible (organ donors).
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Affiliation(s)
- V V Osovskikh
- Almazov National Medical Research Center, St. Petersburg, Russia
| | - L N Kiseleva
- Granov Russian Research Center for Radiology and Surgical Technologies, St. Petersburg, Russia
| | - I N Kolokolnikov
- Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
| | - M S Vasilieva
- Almazov National Medical Research Center, St. Petersburg, Russia
| | - A E Bautin
- Almazov National Medical Research Center, St. Petersburg, Russia
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31
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Ackerman-Banks CM, Bhinder J, Eder M, Heerdt P, Sugeng L, Testani J, Alian A, Lipkind H, Velazquez E, Reddy U, Chou JC. Continuous non-invasive hemodynamic monitoring in early onset severe preeclampsia. Pregnancy Hypertens 2023; 34:27-32. [PMID: 37783090 DOI: 10.1016/j.preghy.2023.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 08/17/2023] [Accepted: 09/15/2023] [Indexed: 10/04/2023]
Abstract
OBJECTIVES Continuous hemodynamic monitoring offers the opportunity to individualize management in severe preeclampsia (PEC). We compared cardiac output (CO) and total peripheral resistance (TPR) measured by bioreactance (NICOM), Clearsite™ Fingercuff [CS), and 3D-echocardiography (3DE). STUDY DESIGN This prospective observational study included 12 pregnant patients with early PEC. CO and TPR were measured simultaneously by NICOM, CS, and 3DE antepartum and 1-2 days postpartum. Using 3DE as the standard, CS and NICOM interchangeability, precision, accuracy, and correlation were assessed. RESULTS Compared to 3DE-CO, CS-CO was highly correlated (R2 = 0.70, p = <0.0001) with low percentage error (PE 29%) which met criteria for interchangeablity. CS-TPR had strong correlation (R2 = 0.81, p = <0.0001) and low PE (29%). While CS tended to slightly overestimate CO (bias + 2.05 ±1.18 L/min, limit of agreement (LOA) -0.20 to 4.31) and underestimate TPR (bias -279 ±156 dyes/sec/cm5; LOA -580 to 18.4) these differences were unlikely to be clinically significant. Thus CS could be interchangeable with 3DE for CO and TPR. NICOM-CO had only moderate correlation with 3DE-CO (R2 = 0.29, p = 0.01) with high PE (52%) above threshold for interchangeability. NICOM-CO had low mean bias (-1.2 ±1.68 L/min) but wide 95% LOA (-4.41 to 2.14) suggesting adequate accuracy but low precision in relation to 3DE-CO. NICOM-TPR had poor correlation with 3DE-TPR (R2 = 0.32, p = 0.001) with high PE (67%), relatively low mean bias (238 ±256), and wide 95% LOA (-655 to 1131). NICOM did not meet the criteria for interchangeable with 3DE for CO and TPR. CONCLUSIONS Clearsite Fingercuff, but not NICOM, has potential to be clinically useful for CO and TPR monitoring in severe preeclampsia.
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Affiliation(s)
| | - Jasjit Bhinder
- Department of Cardiology, Northwell Health, Manhasset, NY, United States.
| | - Maxwell Eder
- Department of Cardiology, Yale School of Medicine, New Haven, CT, United States.
| | - Paul Heerdt
- Department of Anesthesiology, Yale School of Medicine, New Haven, CT, United States.
| | - Lissa Sugeng
- Department of Cardiology, Northwell Health, Manhasset, NY, United States.
| | - Jeffrey Testani
- Department of Cardiology, Yale School of Medicine, New Haven, CT, United States.
| | - Aymen Alian
- Department of Anesthesiology, Yale School of Medicine, New Haven, CT, United States.
| | - Heather Lipkind
- Department of Obstetrics and Gynecology, Weill Cornell Medical College, New York City, NY, United States.
| | - Eric Velazquez
- Department of Cardiology, Yale School of Medicine, New Haven, CT, United States.
| | - Uma Reddy
- Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York City, NY, United States.
| | - Josephine C Chou
- Department of Cardiology, University of Colorado, Aurora, CO, United States.
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Yahagi M, Sasaki M. Comparison of direct intra-arterial pressure and ClearSight finger cuff arterial pressure measurements in elderly patients undergoing transcatheter aortic valve replacement. Blood Press Monit 2023; 28:309-315. [PMID: 37889559 DOI: 10.1097/mbp.0000000000000666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
OBJECTIVE This study aimed to assess the agreement between direct intra-arterial pressure and ClearSight finger cuff arterial pressure measurements in elderly patients undergoing transcatheter aortic valve replacement (TAVR). METHODS A prospective observational study was conducted at Hitachi General Hospital, Japan, involving 30 patients aged 65 years and older who underwent TAVR under general anesthesia. Intra-arterial pressure and finger cuff arterial pressure measurements were recorded for 30 min after valve deployment. Bland-Altman analysis, four-quadrant plot analysis, and error grid analysis were used to assess the concordance between the two methods. Multiple regression analysis was performed to explore potential confounding factors affecting the agreement. RESULTS The bias and precision of ClearSight measurements were -4.88 ± 15.46 (mmHg) for SBP, 4.73 ± 8.95 (mmHg) for mean, and 9.53 ± 9.01 (mmHg) for DBP. The Bland-Altman analysis demonstrated acceptable agreement between intra-arterial pressure and finger cuff arterial pressure measurements. The four-quadrant plot analysis showed good trend-tracking ability, and the error grid analysis revealed that most of the observed values fell into the no-risk category. The mean BP match ratio and SBP match ratio were influenced by several factors such as age, BSA, ejection fraction, valve size, and gender. CONCLUSION The ClearSight finger cuff arterial pressure measurement showed good agreement with direct intra-arterial pressure in elderly patients undergoing TAVR. However, factors such as age, BSA, ejection fraction, valve size, and gender may influence the agreement between the two methods.
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Affiliation(s)
- Musashi Yahagi
- Department of Anaesthesiology, Hitachi General Hospital, Hitachi, Ibaraki, Japan
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Xu X, Tang Q, Chen Z. Improved U-Net Model to Estimate Cardiac Output Based on Photoplethysmography and Arterial Pressure Waveform. SENSORS (BASEL, SWITZERLAND) 2023; 23:9057. [PMID: 38005445 PMCID: PMC10675453 DOI: 10.3390/s23229057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/01/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023]
Abstract
We aimed to estimate cardiac output (CO) from photoplethysmography (PPG) and the arterial pressure waveform (ART) using a deep learning approach, which is minimally invasive, does not require patient demographic information, and is operator-independent, eliminating the need to artificially extract a feature of the waveform by implementing a traditional formula. We aimed to present an alternative to measuring cardiac output with greater accuracy for a wider range of patients. Using a publicly available dataset, we selected 543 eligible patients and divided them into test and training sets after preprocessing. The data consisted of PPG and ART waveforms containing 2048 points with the corresponding CO. We achieved an improvement based on the U-Net modeling framework and built a two-channel deep learning model to automatically extract the waveform features to estimate the CO in the dataset as the reference, acquired using the EV1000, a commercially available instrument. The model demonstrated strong consistency with the reference values on the test dataset. The mean CO was 5.01 ± 1.60 L/min and 4.98 ± 1.59 L/min for the reference value and the predicted value, respectively. The average bias was -0.04 L/min with a -1.025 and 0.944 L/min 95% limit of agreement (LOA). The bias was 0.79% with a 95% LOA between -20.4% and 18.8% when calculating the percentage of the difference from the reference. The normalized root-mean-squared error (RMSNE) was 10.0%. The Pearson correlation coefficient (r) was 0.951. The percentage error (PE) was 19.5%, being below 30%. These results surpassed the performance of traditional formula-based calculation methods, meeting clinical acceptability standards. We propose a dual-channel, improved U-Net deep learning model for estimating cardiac output, demonstrating excellent and consistent results. This method offers a superior reference method for assessing cardiac output in cases where it is unnecessary to employ specialized cardiac output measurement devices or when patients are not suitable for pulmonary-artery-catheter-based measurements, providing a viable alternative solution.
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Affiliation(s)
- Xichen Xu
- School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, China;
| | - Qunfeng Tang
- School of Life & Environmental Science, Guilin University of Electronic Technology, Guilin 541004, China
| | - Zhencheng Chen
- School of Life & Environmental Science, Guilin University of Electronic Technology, Guilin 541004, China
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Cho HY, Lee HJ, Hwang IE, Lee HC, Kim WH, Yang SM. Comparison of invasive and non-invasive measurements of cardiac index and systemic vascular resistance in living-donor liver transplantation: a prospective, observational study. BMC Anesthesiol 2023; 23:359. [PMID: 37924013 PMCID: PMC10625262 DOI: 10.1186/s12871-023-02302-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 09/28/2023] [Indexed: 11/06/2023] Open
Abstract
BACKGROUND Based on the controversy surrounding pulmonary artery catheterization (PAC) in surgical patients, we investigated the interchangeability of cardiac index (CI) and systemic vascular resistance (SVR) measurements between ClearSight™ and PAC during living-donor liver transplantation (LDLT). METHODS This prospective study included consecutively selected LDLT patients. ClearSight™-based CI and SVR measurements were compared with those from PAC at seven LDLT-stage time points. ClearSight™-based systolic (SAP), mean (MAP), and diastolic (DAP) arterial pressures were also compared with those from femoral arterial catheterization (FAC). For the comparison and analysis of ClearSight™ and the reference method, Bland-Altman analysis was used to analyze accuracy while polar and four-quadrant plots were used to analyze the trending ability. RESULTS From 27 patients, 189 pairs of ClearSight™ and reference values were analyzed. The CI and SVR performance errors (PEs) exhibited poor accuracy between the two methods (51.52 and 51.73%, respectively) in the Bland-Altman analysis. CI and SVR also exhibited unacceptable trending abilities in both the polar and four-quadrant plot analyses. SAP, MAP, and DAP PEs between the two methods displayed favorable accuracy (24.28, 21.18, and 26.26%, respectively). SAP and MAP exhibited acceptable trending ability in the four-quadrant plot between the two methods, but not in the polar plot analyses. CONCLUSIONS During LDLT, CI and SVR demonstrated poor interchangeability, while SAP and MAP exhibited acceptable interchangeability between ClearSight™ and FAC.
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Affiliation(s)
- Hye-Yeon Cho
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Anesthesiology and Pain Medicine, Nowon Eulji Medical Center, Eulji University, Seoul, Republic of Korea
| | - Ho-Jin Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - In Eob Hwang
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Hyung-Chul Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Won Ho Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Seong-Mi Yang
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.
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Heerdt PM, Martin-Flores M, Oakland HT, Joseph P, Singh I. Integrating Right Ventricular Pressure Waveform Analysis With Two-Point Volume Measurement for Quantification of Systolic and Diastolic Function: Experimental Validation and Clinical Application. J Cardiothorac Vasc Anesth 2023; 37:1929-1937. [PMID: 37422337 PMCID: PMC10529383 DOI: 10.1053/j.jvca.2023.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 05/20/2023] [Accepted: 06/06/2023] [Indexed: 07/10/2023]
Abstract
OBJECTIVE To define in an experimental model the variance, accuracy, precision, and concordance of single-beat measures of right ventricular (RV) contractility and diastolic capacitance relative to conventional reference standards, and apply the methods to a clinical data set. DESIGN A retrospective, observational analysis of recorded pressure waveforms and RV volume measurements. SETTING At a university laboratory. PARTICIPANTS Archived data from previous studies of anesthetized swine and awake patients undergoing clinically-indicated right-heart catheterization. INTERVENTIONS Recording of RV pressure with simultaneous measurement of RV volume by conductance (swine) or 3-dimensional (3D) echocardiography (humans) during changes in contractility and/or loading conditions. MEASUREMENTS AND MAIN RESULTS Using experimental data, single-beat measures of RV contractility quantified as end-systolic elastance, and diastolic capacitance quantified as the predicted volume at an end-diastolic pressure of 15 mmHg (V15), were compared to multi-beat, preload- variant, reference standards using correlation, Bland-Altman analysis, and 4-quadrant concordance testing. This analysis indicated that the methods were not directly interchangeable with reference standards, but were sufficiently robust to suggest potential clinical utility. Clinical application supported this potential by demonstrating enhanced assessment of the response to inhaled nitric oxide in patients undergoing diagnostic right-heart catheterization. CONCLUSIONS Study results supported the possibility of integrating automated RV pressure analysis with RV volume measured by 3D echocardiography to create a comprehensive assessment of RV systolic and diastolic function at the bedside.
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Affiliation(s)
- Paul M Heerdt
- Department of Anesthesiology, Applied Hemodynamics, Yale School of Medicine, New Haven, CT.
| | - Manuel Martin-Flores
- Department of Clinical Sciences, Cornell University College of Veterinary Medicine, Ithaca, NY
| | - Hannah T Oakland
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Yale New Haven Hospital and Yale School of Medicine, New Haven, CT
| | - Phillip Joseph
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Yale New Haven Hospital and Yale School of Medicine, New Haven, CT
| | - Inderjit Singh
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Yale New Haven Hospital and Yale School of Medicine, New Haven, CT
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Hirooka M, Koizumi Y, Nakamura Y, Yano R, Hirooka K, Morita M, Imai Y, Tokumoto Y, Abe M, Hiasa Y. B-mode shear wave elastography can be an alternative method to vibration-controlled transient elastography according to a moderate-scale population study. J Med Ultrason (2001) 2023; 50:473-483. [PMID: 37402022 DOI: 10.1007/s10396-023-01333-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 05/15/2023] [Indexed: 07/05/2023]
Abstract
PURPOSE We aimed to compare vibration-controlled transient elastography (VCTE) with shear wave elastography (SWE) without previous analysis and generate regression equations between VCTE and new point SWE using combination-elastography. METHODS Overall, 829 patients with chronic liver disease were enrolled in this study. Patients with a skin-liver capsule distance > 25 mm were excluded. The reproducibility of VCTE and SWE was confirmed in a phantom study and a clinical study. Considering that combination-elastography allows measurement based on strain elastography, a similar analysis was performed for the liver fibrosis index (LFI), which is a quantitative value for evaluation of liver fibrosis calculated using strain elastography image features. Regression equations between the VCTE and SWE values were obtained based on linear regression analysis. RESULTS In the phantom study and clinical study, there was a strong correlation between VCTE and SWE [r = 0.995 (p < 0.001) and r = 0.747 (p < 0.001), respectively). The regression equation between VCTE and SWE was VCTE (kPa) = 1.09 × point SWE (kPa) - 0.17. The Bland-Altman plots revealed no statistically significant bias. Meanwhile, there was no correlation between VCTE and LFI (r = 0.279). There was a statistically significant bias between VCTE and LFI in the Bland-Altman plots. The inter-operator reliability showed a good intraclass correlation coefficient of 0.760 (95% confidence interval: 0.720-0.779). CONCLUSION Liver stiffness measured using point SWE was comparable to that measured using VCTE.
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Affiliation(s)
- Masashi Hirooka
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan.
| | - Yohei Koizumi
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan
| | - Yoshiko Nakamura
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan
| | - Ryo Yano
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan
| | - Kana Hirooka
- Department of Gastroenterology and Metabology, National Hospital Organization Ehime Medical Center, Toon, Japan
| | - Makoto Morita
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan
| | - Yusuke Imai
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan
| | - Yoshio Tokumoto
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan
| | - Masanori Abe
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan
| | - Yoichi Hiasa
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Shitsukawa 454, Toon, Ehime, 791-0295, Japan
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Husstedt I, Spiesshoefer J, Reinecke H, Giannoni A, Kahles F, Dreher M, Boentert M, Tuleta I. Bioimpedance based determination of cardiac index does not show enough trueness for point of care use in patients with systolic heart failure. J Clin Monit Comput 2023; 37:1229-1237. [PMID: 37074524 DOI: 10.1007/s10877-023-00987-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 02/21/2023] [Indexed: 04/20/2023]
Abstract
Cardiac output (CO) is a key parameter in diagnostics and therapy of heart failure (HF). The thermodilution method (TD) as gold standard for CO determination is an invasive procedure with corresponding risks. As an alternative, thoracic bioimpedance (TBI) has gained popularity for CO estimation as it is non-invasive. However, systolic heart failure (HF) itself might worsen its validity. The present study validated TBI against TD. In patients with and without systolic HF (LVEF ≤ 50% or > 50% and NT-pro-BNP < 125 pg/ml, respectively) right heart catheterization including TD was performed. TBI (Task Force Monitor©, CNSystems, Graz, Austria) was conducted semi-simultaneously. 14 patients with and 17 patients without systolic HF were prospectively enrolled in this study. In all participants, TBI was obtainable. Bland-Altman analysis indicated a mean bias of 0.3 L/min (limits of agreement ± 2.0 L/min, percentage error or PE 43.3%) for CO and a bias of -7.3 ml (limits of agreement ± 34 ml) for cardiac stroke volume (SV). PE was markedly higher in patients with compared to patients without systolic HF (54% vs. 35% for CO). Underlying systolic HF substantially decreases the validity of TBI for estimation of CO and SV. In patients with systolic HF, TBI clearly lacks diagnostic accuracy and cannot be recommended for point-of-care decision making. Depending on the definition of an acceptable PE, TBI may be considered sufficient when systolic HF is absent.Trial registration number: DRKS00018964 (German Clinical Trial Register, retrospectively registered).
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Affiliation(s)
- Imke Husstedt
- Department of Neurology with Institute for Translational Neurology, University of Muenster, Muenster, Germany.
| | - Jens Spiesshoefer
- Department of Pneumology and Intensive Care Medicine, University Hospital RWTH Aachen, Aachen, Germany
- Institute of Life Sciences, Scuola Superiore Sant´Anna, Pisa, Italy
| | - Holger Reinecke
- Department of Cardiology I, University Hospital Muenster, Muenster, Germany
| | - Alberto Giannoni
- Institute of Life Sciences, Scuola Superiore Sant´Anna, Pisa, Italy
| | - Florian Kahles
- Cardiology and Cardiovascular Medicine Division, University Hospital RWTH Aachen, Aachen, Germany
| | - Michael Dreher
- Department of Pneumology and Intensive Care Medicine, University Hospital RWTH Aachen, Aachen, Germany
| | - Matthias Boentert
- Department of Neurology with Institute for Translational Neurology, University of Muenster, Muenster, Germany
- Department of Medicine, UKM Marienhospital Steinfurt, Steinfurt, Germany
| | - Izabela Tuleta
- Department of Cardiology I, University Hospital Muenster, Muenster, Germany
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Paranjape VV, Henao-Guerrero N, Menciotti G, Saksena S. Performance of four cardiac output monitoring techniques vs. intermittent pulmonary artery thermodilution during a modified passive leg raise maneuver in isoflurane-anesthetized dogs. Front Vet Sci 2023; 10:1238549. [PMID: 37781276 PMCID: PMC10538972 DOI: 10.3389/fvets.2023.1238549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 08/21/2023] [Indexed: 10/03/2023] Open
Abstract
Objective This study investigated the performance among four cardiac output (CO) monitoring techniques in comparison with the reference method intermittent pulmonary artery thermodilution (iPATD) and their ability to diagnose fluid responsiveness (FR) during a modified passive leg raise (PLRM) maneuver in isoflurane-anesthetized dogs undergoing acute blood volume manipulations. The study also examined the simultaneous effect of performing the PLRM on dynamic variables such as stroke distance variation (SDV), peak velocity variation (PVV), and stroke volume variation (SVV). Study design Prospective, nonrandomized, crossover design. Study animals Six healthy male Beagle dogs. Methods The dogs were anesthetized with propofol and isoflurane and mechanically ventilated under neuromuscular blockade. After instrumentation, they underwent a series of sequential, nonrandomized steps: Step 1: baseline data collection; Step 2: removal of 33 mL kg-1 of circulating blood volume; Step 3: blood re-transfusion; and Step 4: infusion of 20 mL kg-1 colloid solution. Following a 10-min stabilization period after each step, CO measurements were recorded using esophageal Doppler (EDCO), transesophageal echocardiography (TEECO), arterial pressure waveform analysis (APWACO), and electrical cardiometry (ECCO). Additionally, SDV, PVV, and SVV were recorded. Intermittent pulmonary artery thermodilution (iPATDCO) measurements were also recorded before, during, and after the PLRM maneuver. A successful FR diagnosis made using a specific test indicated that CO increased by more than 15% during the PLRM maneuver. Statistical analysis was performed using one-way analysis of variance for repeated measures with post hoc Tukey test, linear regression, Lin's concordance correlation coefficient (ρc), and Bland-Altman analysis. Statistical significance was set at p < 0.05. Results All techniques detected a reduction in CO (p < 0.001) during hemorrhage and an increase in CO after blood re-transfusion and colloid infusion (p < 0.001) compared with baseline. During hemorrhage, CO increases with the PLRM maneuver were as follows: 33% for iPATD (p < 0.001), 19% for EC (p = 0.03), 7% for APWA (p = 0.97), 39% for TEE (p < 0.001), and 17% for ED (p = 0.02). Concurrently, decreases in SVV, SDV, and PVV values (p < 0.001) were also observed. The percentage error for TEE, ED, and EC was less than 30% but exceeded 55% for APWA. While TEECO and ECCO slightly underestimated iPATDCO values, EDCO and APWACO significantly overestimated iPATDCO values. TEE and EC exhibited good and acceptable agreement with iPATD. However, CO measurements using all four techniques and iPATD did not differ before, during, and after PLRM at baseline, blood re-transfusion, and colloid infusion. Conclusion and clinical relevance iPATD, EC, TEE, and ED effectively assessed FR in hypovolemic dogs during the PLRM maneuver, while the performance of APWA was unacceptable and not recommended. SVV, SDV, and PVV could be used to monitor CO changes during PLRM and acute blood volume manipulations, suggesting their potential clinical utility.
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Affiliation(s)
- Vaidehi V. Paranjape
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Natalia Henao-Guerrero
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Giulio Menciotti
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Siddharth Saksena
- Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
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Fremuth J, Huml M, Pomahacova T, Kobr J, Kormunda S, Sykora J. Stroke Volume Measurements by Echocardiography and Ultrasonic Cardiac Output Monitor in Children: A Prospective Observational Cohort Study. Pediatr Emerg Care 2023; 39:680-684. [PMID: 37478016 PMCID: PMC10487356 DOI: 10.1097/pec.0000000000003018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/23/2023]
Abstract
OBJECTIVES Stroke volume (SV) and cardiac output monitoring is a cornerstone of hemodynamic assessment. Noninvasive technologies are increasingly used in children. This study compared SV measurements obtained by transcutaneous Doppler ultrasound techniques (ultrasonic cardiac output monitor [USCOM]), transthoracic echocardiography jugular (TTE-J), and parasternal (TTE-P) views performed by pediatric intensivists (OP-As) with limited training in cardiac sonography (20 previous examinations) and pediatric cardiologists (OP-Bs) with limited training in USCOM (30 previous examinations) in spontaneously ventilating children. METHODS A single-center study was conducted in 37 children. Each operator obtained 3 sets of USCOM SV measurements within a period of 3 to 5 minutes, followed with TTE measurements from both apical and jugular views. The investigators were blinded to each other's results to prevent visual and auditory bias. RESULTS Both USCOM and TTE methods were applicable in 89% of patients. The intraobserver variability of USCOM, TTE-J, and TTE-P were less than 10% in both investigators. The SV measurements by OP-As using USCOM, TTE-J, and TTE-P were 46.15 (25.48) mL, 39.45 (20.65) mL, and 33.42 (16.69) mL, respectively. The SV measurements by OP-Bs using USCOM, TTE-J, and TTE-P were 43.99 (25.24) mL, 38.91 (19.98) mL, and 37.58 (19.81) mL, respectively.The percentage error in SV with USCOM relative to TTE-J was 36% in OP-As and 37% in OP-Bs. The percentage error in SV with TTE-P was 33% relative to TTE-J in OP-As and 21% in OP-Bs. CONCLUSIONS Our findings show that the methods are not interchangeable because SV values by USCOM are higher in comparison with the SV values obtained by TTE. Both methods have low level of intraobserver variability. The SV measurements obtained by TTE-P were significantly lower compared with the TTE-J for the operator with limited training in echocardiography. The TTE-P requires longer practice compared with the TTE-J; therefore, we recommend to prefer TTE-J to TTE-P for inexperienced operators.
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Wang J, Fan T, Zhang H, Ge Y, Lu W, Liu F, Rong D, Guo W. Aortic hemodynamic and morphological analysis before and after repair of thoracoabdominal aortic aneurysm using a G-Branch endograft. Front Physiol 2023; 14:1234989. [PMID: 37601633 PMCID: PMC10438984 DOI: 10.3389/fphys.2023.1234989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/19/2023] [Indexed: 08/22/2023] Open
Abstract
Background and objective: The G-Branch endograft is a novel multibranched "off-the-shelf" device used to repair thoracoabdominal aortic aneurysms (TAAAs). This report describes the hemodynamic and morphological performance of the G-Branch endograft in a human patient with TAAA. Materials and methods: We retrospectively reviewed the computed tomography angiography scans and clinical data of a woman in whom TAAA was treated using a G-Branch endograft. Patient-specific three-dimensional models were reconstructed, and computational fluid dynamics and morphological and hemodynamic indicators were analyzed before and after implantation of the device. Results: From a morphological perspective, there was an increase in cross-sectional area in the G-Branch endograft and all bridging stent grafts over time. Blood flow was redistributed among the renovisceral arteries, with a decrease in flow rate in the celiac artery and an increase in the left renal artery. Laminar blood flow was smoother and more rapid after implantation of the G-Branch device and remained stable during follow-up. In the bridging stent grafts, flow recirculation zones were found in the bridging zones of the celiac artery and superior mesenteric artery as well as the distal sealing zones of both renal arteries. Furthermore, higher time-averaged wall shear stress and a lower oscillatory index and relative resident time were found in the G-Branch endograft and bridging stent grafts. Quantitative analysis showed obvious reduction in the surface area ratio of the elevated time-averaged wall shear stress area and surface area ratio of the relative resident time after G-branch implantation. Conclusion: The revascularization of branch vessels occurred following G-branch implantation, with improvements arising not only from morphological changes but also from hemodynamic alterations. The long-term performance of the G-Branch endograft needs further investigation and clinical validation.
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Affiliation(s)
- Jiabin Wang
- The First Medical Centre, Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing, China
- Medical School of Chinese PLA, Beijing, China
| | - Tingting Fan
- School of Biomedical Engineering, Capital Medical University, Beijing, China
| | - Hongpeng Zhang
- The First Medical Centre, Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing, China
| | - Yangyang Ge
- The First Medical Centre, Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing, China
| | - Weihang Lu
- The First Medical Centre, Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing, China
| | - Feng Liu
- The First Medical Centre, Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing, China
| | - Dan Rong
- The First Medical Centre, Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing, China
| | - Wei Guo
- The First Medical Centre, Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing, China
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Paranjape VV, Garcia-Pereira FL, Menciotti G, Saksena S, Henao-Guerrero N, Ricco-Pereira CH. Evaluation of Electrical Cardiometry for Measuring Cardiac Output and Derived Hemodynamic Variables in Comparison with Lithium Dilution in Anesthetized Dogs. Animals (Basel) 2023; 13:2362. [PMID: 37508139 PMCID: PMC10376001 DOI: 10.3390/ani13142362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
Numerous cardiac output (CO) technologies were developed to replace the 'gold standard' pulmonary artery thermodilution due to its invasiveness and the risks associated with it. Minimally invasive lithium dilution (LiD) shows excellent agreement with thermodilution and can be used as a reference standard in animals. This study evaluated CO via noninvasive electrical cardiometry (EC) and acquired hemodynamic variables against CO measured using LiD in six healthy, anesthetized dogs administered different treatments (dobutamine, esmolol, phenylephrine, and high-dose isoflurane) impacting CO values. These treatments were chosen to cause drastic variations in CO, so that fair comparisons between EC and LiD across a wide range of CO values (low, intermediate, and high) could be made. Statistical analysis included linear regression, Bland-Altman plots, Lin's concordance correlation coefficient (ρc), and polar plots. Values of p < 0.05 represented significance. Good agreement was observed between EC and LiD, but consistent underestimation was noted when the CO values were high. The good trending ability, ρc of 0.88, and low percentage error of ±31% signified EC's favorable performance. Other EC-acquired variables successfully tracked changes in CO measured using LiD. EC may be a pivotal hemodynamic tool for continuously monitoring circulatory changes, as well as guiding and treating cardiovascular anesthetic complications in clinical settings.
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Affiliation(s)
- Vaidehi V Paranjape
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA 24061, USA
| | | | - Giulio Menciotti
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA 24061, USA
| | - Siddharth Saksena
- Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Natalia Henao-Guerrero
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA 24061, USA
| | - Carolina H Ricco-Pereira
- Department of Veterinary Clinical Sciences, The Ohio State University-College of Veterinary Medicine, Columbus, OH 43210, USA
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Öhman T, Jalde FC, Fredby M, Björne H, Karlsson J. Effect of external dead space removal on CO 2 homeostasis in mechanically ventilated adult Covid-19 patients. Acta Anaesthesiol Scand 2023. [PMID: 37354078 DOI: 10.1111/aas.14252] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 12/29/2022] [Accepted: 03/29/2023] [Indexed: 06/26/2023]
Abstract
BACKGROUND Patients with Covid-19 respiratory failure present with hypoxemia, often in combination with hypercapnia. In this prospective, observational study we examined the effect of removing external dead space (DS) on CO2 -homeostasis in mechanically ventilated Covid-19 patients. In addition, volumetric capnography was validated for its ability to estimate external DS volume using in vitro measured DS volumes as reference. METHODS In total, 10 patients with acute respiratory distress syndrome from Covid-19 were included. Volumetric capnography, mechanical ventilation, and arterial blood gas data were analyzed before and after removal of external DS and analyzed for potentially significant changes in response to DS removal. Measurements of external DS were obtained in circuit using volumetric capnography and compared to actual measured DS volumes off the circuit. RESULTS After the removal of external DS, the alveolar minute ventilation and CO2 elimination improved, notwithstanding unchanged respiratory rate and tidal volumes. The increase in CO2 elimination was associated with a decrease in arterial CO2 partial pressure (PaCO2 ). The volumetric capnography method for assessment of external DS showed a low bias of -9 mL (lower limit of agreement -40, 95% CI -60 to -20 mL, upper limit of agreement 21 mL, 95% CI: 1-40 mL) and a percentage error of 48% compared to absolute values measured in vitro. CONCLUSION Removal of external DS increased alveolar minute ventilation and CO2 elimination in Covid-19 patients with respiratory failure in the current study. This was associated with a decrease in PaCO2 . This may indicate a decreased CO2 production due to decreased work of breathing and more effective gas-exchange in response to DS removal. In addition, volumetric capnography appears to be a clinically feasible method for continuous measurement of external DS in the current study and may be of value in optimizing ventilator treatment.
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Affiliation(s)
- Tomas Öhman
- Department of Perioperative Medicine and Intensive Care, Karolinska University Hospital, Stockholm, Sweden
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Francesca Campoccia Jalde
- Department of Thoracic Anesthesiology, Surgical Services and Intensive Care, Karolinska University Hospital, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Magnus Fredby
- Department of Thoracic Anesthesiology, Surgical Services and Intensive Care, Karolinska University Hospital, Stockholm, Sweden
| | - Håkan Björne
- Department of Perioperative Medicine and Intensive Care, Karolinska University Hospital, Stockholm, Sweden
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Jacob Karlsson
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
- Department of Pediatric Perioperative Medicine and Intensive Care, Karolinska University Hospital, Stockholm, Sweden
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Yamazaki Y, Matsuki Y, Shigemi K. A method for calculating left ventricular ejection fraction noninvasively from left ventricular arterial coupling (Ees/Ea). BMC Anesthesiol 2023; 23:200. [PMID: 37308833 DOI: 10.1186/s12871-023-02159-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 05/30/2023] [Indexed: 06/14/2023] Open
Abstract
BACKGROUND Ejection fraction (EF), which is assessed using ultrasonography, is a standard parameter for evaluating cardiac function in clinical cardiology and for cardiovascular management during general anesthesia. However, it is impossible to continuously and non-invasively assess EF using ultrasonography. The aim of our study was to develop a method for estimating EF non-invasively using the left ventricular arterial coupling ratio (Ees/Ea). METHODS Ees/Ea was estimated non-invasively using the parameters pre-ejection period (PEP), ejection time (ET), end-systolic pressure (Pes) and diastolic pressure (Pad), which were calculated from a vascular screening system, VeSera 1000/1500 (Fukuda Denshi Co., Ltd., Tokyo, Japan). Then, left ventricular efficiency (Eff) as a pump, defined as the ratio of external work (EW) to myocardial oxygen consumption, which strongly correlates with the pressure-volume area (PVA), was calculated by a new formula using Ees/Ea, and was used to approximate EF (EFeff). Simultaneously, we measured EF using transthoracic echocardiography (EFecho), and compared it with EFeff. RESULTS The study included 44 healthy adults (36 males, 8 females), in whom mean EFecho was 66 ± 5% and EFeff was 57 ± 9%. We found a positive correlation between EFecho and EFeff (R2 = 0.219, p < 0.05) on Bland-Altman analysis, with limits of agreement of - 7.5 to 24.4%, and percentage error of 24%. CONCLUSION The results suggest that EF can be measured non-invasively using left ventricular arterial coupling.
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Affiliation(s)
- Yukiko Yamazaki
- Intensive Care Medicine, University of Fukui Hospital, Fukui, Japan
| | - Yuka Matsuki
- Department of Anesthesiology and Reanimatology, Faculty of Medicine Sciences, University of Fukui Hospital, 23-3 Eiheijicho, Yoshidagun, 910-1193, Fukui, Japan.
| | - Kenji Shigemi
- Department of Anesthesiology and Reanimatology, Faculty of Medicine Sciences, University of Fukui Hospital, 23-3 Eiheijicho, Yoshidagun, 910-1193, Fukui, Japan
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Cheong I, Castro VO, Gómez RA, Merlo PM, Tamagnone FM. A modified subcostal view: a novel method for measuring the LVOT VTI. J Ultrasound 2023; 26:429-434. [PMID: 35449385 PMCID: PMC10247580 DOI: 10.1007/s40477-022-00671-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 02/21/2022] [Indexed: 01/31/2023] Open
Abstract
PURPOSE The velocity time integral (VTI) of the left ventricular outflow tract (LVOT) obtained in the apical view by echocardiography can be regarded as a surrogate for the stroke volume. In critically ill patients it is often difficult to obtain an appropriate apical view to assess the VTI. The subcostal view is more accessible, but while it allows a qualitative assessment of the heart, is not adequate for estimating a reliable LVOT VTI, given the inappropriate angle between the Doppler signal and the flow through the LVOT. We present a new modified subcostal view that allows a proper LVOT VTI measurement. METHODS This is a single-centre experimental, retrospective, and observational study using data from patients in a tertiary-care centre. We included adult patients admitted to the intensive care unit in the period from June 2020 to January 2022, who were evaluated by echocardiography and whose LVOT VTI was measured aligned with the Doppler signal in both the apical five-chamber view and the modified subcostal view. RESULTS A total of 30 patients were evaluated in the study period by ultrasonography. The Bland-Altman method analysis of the LVOT VTI measured in the apical view compared with that obtained in the subcostal view showed a bias of 0.8 (95% CI 0.39-1.21) with a 95% limit of agreement between - 1.35 (95% CI - 2.06 to - 0.64) and 2.96 (95% CI 2.25-3.67). The percentage error was calculated to be 23%. The Pearson correlation coefficient for the two forms of measurements showed an R value of 0.98 (95% CI 0.96-0.99). CONCLUSION The LVOT VTI measured in a modified subcostal view is useful for estimating the value of the LVOT VTI obtained in an apical view.
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Affiliation(s)
- Issac Cheong
- Department of Critical Care Medicine, Intensive Care Unit, CABA, Sanatorio De los Arcos, Juan B. Justo 909, Buenos Aires, Argentina.
- Argentinian Critical Care Ultrasonography Association (ASARUC), Buenos Aires, Argentina.
| | - Victoria Otero Castro
- Department of Critical Care Medicine, Intensive Care Unit, CABA, Sanatorio De los Arcos, Juan B. Justo 909, Buenos Aires, Argentina
| | - Raúl Alejandro Gómez
- Department of Critical Care Medicine, Intensive Care Unit, CABA, Sanatorio De los Arcos, Juan B. Justo 909, Buenos Aires, Argentina
| | - Pablo Martín Merlo
- Argentinian Critical Care Ultrasonography Association (ASARUC), Buenos Aires, Argentina
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Greiwe G, Flick M, Hapfelmeier A, Winkler MS, Nitzschke R, Frings D, Saugel B. Agreement between cardiac output measurements by pulse wave analysis using the Pressure Recording Analytical Method and transthoracic echocardiography in patients with veno-venous extracorporeal membrane oxygenation therapy: An observational method comparison. Eur J Anaesthesiol 2023; 40:436-441. [PMID: 37052059 DOI: 10.1097/eja.0000000000001828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
BACKGROUND Measuring cardiac output (CO) is important in patients treated with veno-venous extracorporeal membrane oxygenation (vvECMO) because vvECMO flow and CO need to be balanced. Uncalibrated pulse wave analysis with the Pressure Recording Analytical Method (PRAM) may be suitable to measure CO in patients with vvECMO therapy. OBJECTIVE To assess the agreement between CO measured by PRAM (PRAM-CO; test method) and CO measured by transthoracic echocardiography (TTE-CO; reference method). DESIGN A prospective observational method comparison study. SETTING The ICU of a German university hospital between March and December 2021. PATIENTS Thirty one adult patients with respiratory failure requiring vvECMO therapy: 29 of the 31 patients (94%) were treated for COVID-19 related respiratory failure. MAIN OUTCOME MEASURES PRAM-CO and TTE-CO were measured simultaneously at two time points in each patient with at least 20 min between measurements. A radial or femoral arterial catheter-derived blood pressure waveform was used for PRAM-CO measurements. TTE-CO measurements were conducted using the pulsed wave Doppler-derived velocity time integral of the left ventricular outflow tract (LVOT) and the corresponding LVOT diameter. PRAM-CO and TTE-CO were compared using Bland-Altman analysis and the percentage error (PE). We defined a PE of <30% as clinically acceptable. RESULTS Mean ± SD PRAM-CO was 6.86 ± 1.49 l min -1 and mean TTE-CO was 6.94 ± 1.58 l min -1 . The mean of the differences between PRAM-CO and TTE-CO was 0.09 ± 0.73 l min -1 with a lower 95% limit of agreement of -1.34 l min -1 and an upper 95% limit of agreement of 1.51 l min -1 . The PE was 21%. CONCLUSIONS The agreement between PRAM-CO and TTE-CO is clinically acceptable in adult patients with vvECMO therapy.
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Affiliation(s)
- Gillis Greiwe
- From the Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (GG, MF, RN, BS), the Institute of General Practice and Health Services Research, School of Medicine, Technical University of Munich, Munich, Germany (AH), the Institute of AI and Informatics in Medicine, School of Medicine, Technical University of Munich, Munich, Germany (AH), the Department of Anesthesiology and Intensive Care, University Medical Center Göttingen, Göttingen, Germany (MSW), the Department of Intensive Care Medicine, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (DF), the Outcomes Research Consortium, Cleveland, Ohio, USA (BS)
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Gratz I, Baruch M, Awad A, McEniry B, Allen I, Seaman J. A new continuous noninvasive finger cuff device (Vitalstream) for cardiac output that communicates wirelessly via bluetooth or Wi-Fi. BMC Anesthesiol 2023; 23:180. [PMID: 37231335 DOI: 10.1186/s12871-023-02114-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 04/27/2023] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND The new noninvasive Vitalstream (VS) continuous physiological monitor (Caretaker Medical LLC, Charlottesville, Virginia), allows continuous cardiac output by a low pump-inflated, finger cuff that pneumatically couples arterial pulsations via a pressure line to a pressure sensor for detection and analysis. Physiological data are communicated wirelessly to a tablet-based user interface via Bluetooth or Wi-Fi. We evaluated its performance against thermodilution cardiac output in patients undergoing cardiac surgery. METHODS We compared the agreement between thermodilution cardiac output to that obtained by the continuous noninvasive system during cardiac surgery pre and post-cardiac bypass. Thermodilution cardiac output was performed routinely when clinically indicated by an iced saline cold injectate system. All comparisons between VS and TD/CCO data were post-processed. In order to match the VS CO readings to the averaged discrete TD bolus data, the averaged CO readings of the ten seconds of VS CO data points prior to a sequence of TD bolus injections was matched. Time alignment was based on the medical record time and the VS time-stamped data points. The accuracy against reference TD measurements was assessed via Bland-Altman analysis of the CO values and standard concordance analysis of the ΔCO values (with a 15% exclusion zone). RESULTS Analysis of the data compared the accuracy of the matched measurement pairs of VS and TD/CCO VS absolute CO values with and without initial calibration to the discrete TD CO values, as well as the trending ability, i.e., ΔCO values of the VS physiological monitor compared to those of the reference. The results were comparable with other non-invasive as well as invasive technologies and Bland-Altman analyses showed high agreement between devices in a diverse patient population. The results are significant regarding the goal of expanding access to effective, wireless and readily implemented fluid management monitoring tools to hospital sections previously not covered because of the limitations of traditional technologies. CONCLUSION This study demonstrated that the agreement between the VS CO and TD CO was clinically acceptable with a percent error (PE) of 34.5 to 38% with and without external calibration. The threshold for an acceptable agreement between the VS and TD was considered to be below 40% which is below the threshold recommended by others.
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Affiliation(s)
- Irwin Gratz
- Cooper University Hospital, Camden, NJ, USA.
| | | | - Ahmed Awad
- Cooper University Hospital, Camden, NJ, USA
| | | | - Isabel Allen
- University of California, San Francisco, CA, USA
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Farahmand M, Bodwell E, D'Souza GA, Herbertson LH, Scully CG. Mock circulatory loop generated database for dynamic characterization of pressure-based cardiac output monitoring systems. Comput Biol Med 2023; 160:106979. [PMID: 37167657 DOI: 10.1016/j.compbiomed.2023.106979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/30/2023] [Accepted: 04/23/2023] [Indexed: 05/13/2023]
Abstract
Pulse contour cardiac output monitoring systems allow real-time and continuous estimation of hemodynamic variables such as cardiac output (CO) and stroke volume variation (SVV) by analysis of arterial blood pressure waveforms. However, evaluating the performance of CO monitoring systems to measure the small variations in these variables sometimes used to guide fluid therapy is a challenge due to limitations in clinical reference methods. We developed a non-clinical database as a tool for assessing the dynamic attributes of pressure-based CO monitoring systems, including CO response time and CO and SVV resolutions. We developed a mock circulation loop (MCL) that can simulate rapid changes in different parameters, such as CO and SVV. The MCL was configured to simulate three different states (normovolemic, cardiogenic shock, and hyperdynamic) representing a range of flow and pressure conditions. For each state, we simulated stepwise changes in the MCL flow and collected datasets for characterizing pressure-based CO systems. Nine datasets were generated that contain hours of peripheral pressure, central flow and pressure waveforms. The MCL-generated database is provided open access as a tool for evaluating dynamic characteristics of pressure-based CO algorithms and systems in detecting variations in CO and SVV indices. In an example application of the database, a CO response time of 10 s, CO and SVV resolutions with lower and upper limits of (-9.1%, 8.4%) and (-5.0%, 3.8%), respectively, were determined for a pressure-based CO benchtop system. This tool will support a more comprehensive assessment of pressure-based CO monitoring systems and algorithms.
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Affiliation(s)
- Masoud Farahmand
- Center for Devices and Radiological Health, Office of Science and Engineering Laboratories, U.S. Food and Drug Administration, Silver Spring, MD, USA.
| | | | - Gavin A D'Souza
- Center for Devices and Radiological Health, Office of Science and Engineering Laboratories, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Luke H Herbertson
- Center for Devices and Radiological Health, Office of Science and Engineering Laboratories, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Christopher G Scully
- Center for Devices and Radiological Health, Office of Science and Engineering Laboratories, U.S. Food and Drug Administration, Silver Spring, MD, USA
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Vasile CM, Bouteiller XP, Avesani M, Velly C, Chan C, Jalal Z, Thambo JB, Iriart X. Exploring the Potential of Artificial Intelligence in Pediatric Echocardiography-Preliminary Results from the First Pediatric Study Using AI Software Developed for Adults. J Clin Med 2023; 12:3209. [PMID: 37176649 PMCID: PMC10179538 DOI: 10.3390/jcm12093209] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/17/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
(1) Background: Transthoracic echocardiography is the first-line non-invasive investigation for assessing pediatric patients' cardiac anatomy, physiology, and hemodynamics, based on its accessibility and portability, but complete anatomic and hemodynamic assessment is time-consuming. (2) Aim: This study aimed to determine whether an automated software developed for adults could be effectively used for the analysis of pediatric echocardiography studies without prior training. (3) Materials and Methods: The study was conducted at the University Hospital of Bordeaux between August and September 2022 and included 45 patients with normal or near normal heart architecture who underwent a 2D TTE. We performed Spearman correlation and Bland-Altman analysis. (4) Results: The mean age of our patients at the time of evaluation was 8.2 years ± 5.7, and the main reason for referral to our service was the presence of a heart murmur. Bland-Altman analysis showed good agreement between AI and the senior physician for two parameters (aortic annulus and E wave) regardless of the age of the children included in the study. A good agreement between AI and physicians was also achieved for two other features (STJ and EF) but only for patients older than 9 years. For other features, either a good agreement was found between physicians but not with the AI, or a poor agreement was established. In the first case, maybe proper training of the AI could improve the measurement, but in the latter case, for now, it seems unrealistic to expect to reach a satisfactory accuracy. (5) Conclusion: Based on this preliminary study on a small cohort group of pediatric patients, the AI soft originally developed for the adult population, had provided promising results in the evaluation of aortic annulus, STJ, and E wave.
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Affiliation(s)
- Corina Maria Vasile
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Bordeaux, France
| | - Xavier Paul Bouteiller
- IHU Liryc—Electrophysiology and Heart Modelling Institute, Bordeaux University Foundation, 33600 Pessac, France
- Department of Cardiology, Rythmology, CHU of Bordeaux, 33600 Pessac, France
| | - Martina Avesani
- Department of Cardiac, Thoracic, Vascular and Public Health Sciences, University of Padua, 235122 Padova, Italy
| | - Camille Velly
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Bordeaux, France
| | - Camille Chan
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Bordeaux, France
| | - Zakaria Jalal
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Bordeaux, France
| | - Jean-Benoit Thambo
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Bordeaux, France
| | - Xavier Iriart
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Bordeaux, France
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Hayabuchi M, Matsuki Y, Kidoguchi S, Shigemi K. A method for calculating left ventricular end-diastolic volume as an index of left ventricular preload from the pre-ejection period, ejection time, blood pressure, and stroke volume: a prospective, observational study. BMC Anesthesiol 2023; 23:143. [PMID: 37118667 PMCID: PMC10142410 DOI: 10.1186/s12871-023-02103-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 04/21/2023] [Indexed: 04/30/2023] Open
Abstract
BACKGROUND Left ventricular end-diastolic volume (EDV) is a major determinant of cardiac preload. However, its use in fluid management is limited by the lack of a simple means to measure it noninvasively. This study presents a new noninvasive method that was validated against simultaneously measured EDV by transthoracic echocardiography (TTE). The goal of this study was to develop and validate a method to estimate EDV in humans non-invasively from left ventricular arterial coupling (Ees/Ea) and stroke volume (SV). METHODS Ees/Ea can be calculated non-invasively from the four parameters of end-systolic arterial pressure (Pes), diastolic arterial pressure (DBP), pre-ejection period (PEP), and ejection time (ET), using the approximation formula. In addition, if SV can be assessed, EDV can be calculated. Therefore, using a vascular screening system (VaSera 1000/1500, Fukuda Denshi Co., Ltd., Tokyo, Japan), blood pressure, PEP, and ET were measured noninvasively, the SV value was obtained using an ultrasound diagnostic device, EDV was calculated (EDV calc), and it was compared with EDV obtained using the ultrasound diagnostic device (EDV echo). The results are shown as mean ± standard deviation values. RESULTS There were 48 healthy subjects (40 men, 8 women), with a mean age of 24 ± 4 years, mean height of 169 ± 7 cm, and mean weight of 65 ± 12 kg. EDV echo was 91 ± 16 ml, and EDV calc was 102 ± 21 ml. There was a significant correlation between EDV echo and EDV calc (R2 = 0.81, p < 0.01). A Bland-Altman plot between EDV echo and EDV calc showed that the bias and limits of agreement were -11.2 ml (-36.6, + 14.2 ml). CONCLUSIONS The results suggest that EDV can be measured non-invasively from Ees/Ea and SV. This suggests that continuous measurements may potentially work, using equipment available in the intraoperative setting.
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Affiliation(s)
- Mitsuyo Hayabuchi
- Department of Anesthesiology and Reanimatology, University of Fukui Hospital, Fukui, Japan
| | - Yuka Matsuki
- Department of Anesthesiology and Reanimatology, University of Fukui Hospital, Fukui, Japan.
- Faculty of Medicine Sciences, Department of Anesthesiology & Reanimatology, University of Fukui, 23-3 Eiheijicho, Yoshidagun, Fukui, 910-1193, Japan.
| | - Shuhei Kidoguchi
- Department of Clinical Laboratory, University of Fukui Hospital, Fukui, Japan
| | - Kenji Shigemi
- Department of Anesthesiology and Reanimatology, University of Fukui Hospital, Fukui, Japan
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Parulekar P, Powys-Lybbe J, Bassett P, Roques S, Snazelle M, Millen G, Harris T. Comparison of cardiac index measurements in intensive care patients using continuous wave vs. pulsed wave echo-Doppler compared to pulse contour cardiac output. Intensive Care Med Exp 2023; 11:23. [PMID: 37106217 PMCID: PMC10140233 DOI: 10.1186/s40635-023-00499-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 02/10/2023] [Indexed: 04/29/2023] Open
Abstract
PURPOSE Cardiac index (CI) assessments are commonly used in critical care to define shock aetiology and guide resuscitation. Echocardiographic assessment is non-invasive and has high levels of agreement with thermodilution assessment of CI. CI assessment is derived from the velocity time integral (VTI) assessed using pulsed wave (PW) doppler at the level of the left ventricular outflow tract divided by body mass index. Continuous wave (CW) doppler through the aortic valve offers an alternative means to assess VTI and may offer better assessment at high velocities. METHODS We performed a single centre, prospective, observational study in a 15-bed intensive care unit in a busy district general hospital. Patients had simultaneous measurements of cardiac index by Pulse Contour Cardiac Output (PiCCO) (thermodilution), transthoracic echocardiographic PW-VTI and CW-VTI. Mean differences were measured with Bland-Altman limits of agreement and percentage error (PE) calculations. RESULTS Data were collected on 52 patients. 71% were supported with noradrenaline with or without additional inotropic or vasopressor agents. Mean CIs were: CW-VTI 2.7 L/min/m2 (range 0.78-5.11, SD 0.92). PW-VTI 2.33 L/min/m2 (range 0.77-5.40, SD 0.90) and PiCCO 2.86 L/min/m2 (range 1.50-5.56, SD 0.93). CW-VTI and PiCCO mean difference was - 0.16 L/min/m2 PE 43.5%. PW-VTI and PiCCO had a mean difference of - 0.54 L/min/m2 PE 38.6%. CW-VTI and PW-VTI had a mean difference of 0.38 L/min/m2 PE 46.0%. CONCLUSIONS CI derived from both CW-VTI and PW-VTI methods underestimate CI compared to PiCCO, with the CW-VTI method having closer values overall to PiCCO. CW-VTI may offer a more accurate assessment of CI. If using Critchley's PE cutoff of 30%, none of the doppler methods may accurately reflect the actual cardiac index.
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Affiliation(s)
- Prashant Parulekar
- Intensive Care and Acute Medicine, East Kent Hospitals University NHS Foundation Trust, William Harvey Hospital, London, UK.
| | | | | | - Seb Roques
- East Kent Hospitals University NHS Foundation Trust, William Harvey, London, UK
| | - Mark Snazelle
- East Kent Hospitals University NHS Foundation Trust, William Harvey, London, UK
| | - Gemma Millen
- East Kent Hospitals University NHS Foundation Trust, William Harvey, London, UK
| | - Tim Harris
- East Kent Hospitals University NHS Foundation Trust, William Harvey, London, UK
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