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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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Owens B, Hall C. Application of End-Tidal CO2 Monitoring to ICU Management. Crit Care Nurs Q 2024; 47:157-162. [PMID: 38419179 DOI: 10.1097/cnq.0000000000000506] [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: 03/02/2024]
Abstract
Waveform capnography is a noninvasive measurement of ventilation and perfusion commonly employed in the prehospital setting. It is easy to apply, and modern cardiac monitors are equipped with the necessary ports and capability to display results. Despite its ease of use, end-tidal CO2 monitoring has not yet achieved widespread adoption within the hospital setting. It is routinely used in the emergency department and by anesthesiologists, but its application could support ICU management in critically ill patients. Its use is routinely supported by multiple professional societies, and it has been recommended as a requirement in all cardiac arrests. Careful analysis of the waveform and expired carbon dioxide can guide therapy for patients experiencing respiratory emergencies, hemodynamic compromise, metabolic acidosis, and shock due to trauma, hypovolemia, or sepsis. Use of capnography throughout the hospital could improve patient outcomes and prevent unidentified deterioration.
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Affiliation(s)
- Bradley Owens
- Allegheny General Hospital, Pittsburgh, Pennsylvania
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Richards JE, Stein DM, Scalea TM. Damage Control Resuscitation in Traumatic Hemorrhage: It Is More Than Fixing the Holes and Filling the Tank. Anesthesiology 2024; 140:586-598. [PMID: 37982159 DOI: 10.1097/aln.0000000000004750] [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: 11/21/2023]
Abstract
Damage control resuscitation is the foundation of hemorrhagic shock management and includes early administration of plasma, tranexamic acid, and limited crystalloid-containing products.
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Affiliation(s)
- Justin E Richards
- Department of Anesthesiology, University of Maryland School of Medicine; Program in Trauma, R Adams Cowley Shock Trauma Center, Baltimore, Maryland
| | - Deborah M Stein
- Department of Surgery, University of Maryland School of Medicine; Program in Trauma, R Adams Cowley Shock Trauma Center, Baltimore, Maryland
| | - Thomas M Scalea
- Department of Surgery, University of Maryland School of Medicine; Program in Trauma, R Adams Cowley Shock Trauma Center, Baltimore, Maryland
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Lobo SM, Junior JMDS, Malbouisson LM. Improving perioperative care in low-resource settings with goal-directed therapy: a narrative review. BRAZILIAN JOURNAL OF ANESTHESIOLOGY (ELSEVIER) 2024; 74:744460. [PMID: 37648078 DOI: 10.1016/j.bjane.2023.08.004] [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: 04/17/2023] [Revised: 08/04/2023] [Accepted: 08/20/2023] [Indexed: 09/01/2023]
Abstract
Perioperative Goal-Directed Therapy (PGDT) has significantly showed to decrease complications and risk of death in high-risk patients according to numerous meta-analyses. The main goal of PGDT is to individualize the therapy with fluids, inotropes, and vasopressors, during and after surgery, according to patients' needs in order to prevent organic dysfunction development. In this opinion paper we aimed to focus a discussion on possible alternatives to invasive hemodynamic monitoring in low resource settings.
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Affiliation(s)
- Suzana Margareth Lobo
- Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, SP, Brazil.
| | - João Manoel da Silva Junior
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP, Brazil
| | - Luiz Marcelo Malbouisson
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP, Brazil
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Aslanlar E, Alharach CK, Kara İ, Onal O, Aslanlar DA. The Use of End-Tidal CO 2 and Integrated Pulmonary Index to Predict Postspinal Hypotension in Cesarean Section. J Clin Med 2023; 13:85. [PMID: 38202092 PMCID: PMC10779670 DOI: 10.3390/jcm13010085] [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: 11/21/2023] [Revised: 12/11/2023] [Accepted: 12/19/2023] [Indexed: 01/12/2024] Open
Abstract
Early diagnosis and treatment of postspinal hypotension (PSH) in obstetric anaesthesia reduces the risk of maternofetal complications. In this study, the effect of EtCO2 and the integrated pulmonary index (IPI) in predicting PSH was investigated. Patients scheduled for cesarean section under spinal anaesthesia were included. The Capnostream 35 respiratory monitor (Medtronic, Inc., Dublin, Ireland) was used for EtCO2 and IPI. PSH developed in 52 (63.4%) of the 82 patients. EtCO2 and IPI values decreased significantly compared with baseline values in patients who developed PSH. There were statistically significant differences in EtCO2 (p = 0.001) and the IPI change (p = 0.045) in patients who developed PSH compared with those who did not. It was found that the EtCO2 difference had an independent effect on predicting PSH (p < 0.05), whereas the IPI difference did not (p > 0.05). One unit decrease in EtCO2 from the baseline increased the risk of PSH by 3.3 times. ROC curve analysis showed that the magnitude of change in EtCO2 was diagnostic for predicting PSH (AUC: 0.90 (0.83-0.97; p < 0.001)). IPI showed no predictive value for postspinal hypotension in cesarean section. However, EtCO2 monitoring, which is non-invasive and real-time monitoring, can be used to predict postspinal hypotension.
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Affiliation(s)
- Emine Aslanlar
- Department of Anesthesiology, Medicine Faculty, Selcuk University, Ardıçlı, Akademi, Celal Bayar St. No. 313, Konya 42250, Turkey; (İ.K.); (O.O.)
| | - Camille Kamel Alharach
- Department of Anesthesiology, Medicine Faculty, Başkent University, Hocacihan Mahallesi Saray Caddesi No. 1, Konya 42080, Turkey;
| | - İnci Kara
- Department of Anesthesiology, Medicine Faculty, Selcuk University, Ardıçlı, Akademi, Celal Bayar St. No. 313, Konya 42250, Turkey; (İ.K.); (O.O.)
| | - Ozkan Onal
- Department of Anesthesiology, Medicine Faculty, Selcuk University, Ardıçlı, Akademi, Celal Bayar St. No. 313, Konya 42250, Turkey; (İ.K.); (O.O.)
| | - Durmuş Ali Aslanlar
- Meram State Hospital, Hacışaban, Yeni Meram St. No. 97, Konya 42090, Turkey;
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Elnakera AM, Abdullah RM, Matar HM. End-tidal carbon dioxide's change to fluid challenge versus internal jugular vein dispensability index for predicting fluid responsiveness in septic patients: A prospective, observational study. Indian J Anaesth 2023; 67:537-543. [PMID: 37476446 PMCID: PMC10355349 DOI: 10.4103/ija.ija_52_23] [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: 01/21/2023] [Revised: 03/28/2023] [Accepted: 04/29/2023] [Indexed: 07/22/2023] Open
Abstract
Background and Aims The prediction of fluid responsiveness is crucial for the fluid management of septic shock patients. This prospective, observational study was conducted to compare end-tidal carbon dioxide (ETCO2) change due to fluid challenge (FC-induced ΔETCO2) versus internal jugular vein distensibility index (IJVDI) as predictors of fluid responsiveness in such patients. Methods Septic hypoperfused mechanically ventilated patients were classified as fluid responders (Rs) and non-responders (NRs) according to the improvement of left ventricular outflow tract-velocity time integral (ΔLVOT-VTI) after fluid challenge (FC). The receiver operating characteristic (ROC) curves of FC-induced ΔETCO2, pre-(FC) IJVDI and their combination for prediction of fluid responsiveness were compared to that of ΔLVOT-VTI% as a gold standard. Results Of 140 patients who completed the study, 51 (36.4%) patients were classified as Rs and 89 (63.6%) patients as NRs. With regard to the prediction of fluid responsiveness, no significant difference (P. 0. 384) was found between the diagnostic accuracy of FC-induced ΔETCO2 >2 mmHg (area under the ROC curve [AUC] 0.908, P < 0.001) and that of pre-(FC) IJVDI >18% (AUC 0.938, P < 0.001), but a prediction model combining both markers, ΔETCO2 ≥3 mmHg and IJVDI ≥16%, achieved significantly higher accuracy (AUC 0.982, P < 0.001) than each independent one (P < 0.05). Conclusion Under stable ventilatory and metabolic conditions, the predictivity of FC-induced ΔETCO2 >2 mmHg can be comparable to that of pre-(FC) IJVDI >18%. A predictive model combining both FC-induced ΔETCO2 ≥3 mmHg and IJVDI ≥16% can provide higher accuracy than that recorded for each one independently.
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Affiliation(s)
- Abeer M. Elnakera
- Department of Anesthesia and Surgical Intensive Care, Zagazig University, Egypt
| | - Radwa M. Abdullah
- Department of Cardiology, Faculty of Medicine, Zagazig University, Egypt
| | - Heba M. Matar
- Department of Anesthesia and Surgical Intensive Care, Zagazig University, Egypt
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Paranjape VV, Henao-Guerrero N, Menciotti G, Saksena S. Volumetric evaluation of fluid responsiveness using a modified passive leg raise maneuver during experimental induction and correction of hypovolemia in anesthetized dogs. Vet Anaesth Analg 2023; 50:211-219. [PMID: 36967326 DOI: 10.1016/j.vaa.2023.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 02/10/2023] [Accepted: 02/11/2023] [Indexed: 02/22/2023]
Abstract
OBJECTIVE To demonstrate if modified passive leg raise (PLRM) maneuver can be used for volumetric evaluation of fluid responsiveness (FR) by inducing cardiac output (CO) changes during experimental induction and correction of hypovolemia in healthy anesthetized dogs. The effects of PLRM on plethysmographic variability index (PVI) and pulse pressure variation (PPV) were also investigated. STUDY DESIGN Prospective, crossover study. ANIMALS A total of six healthy anesthetized Beagle dogs. METHODS Dogs were anesthetized with propofol and isoflurane. They were mechanically ventilated under neuromuscular blockade, and normothermia was maintained. After instrumentation, all dogs were subjected to four stages: 1, baseline; 2, removal of 27 mL kg-1 circulating blood volume; 3, after blood re-transfusion; and 4, after 20 mL kg-1 hetastarch infusion over 20 minutes. A 10 minute stabilization period was allowed after induction of each stage and before data collection. At each stage, CO via pulmonary artery thermodilution, PVI, PPV and cardiopulmonary variables were measured before, during and after the PLRM maneuver. Stages were sequential, not randomized. Statistical analysis included repeated measures anova and Tukey's post hoc test, considering p < 0.05 as significant. RESULTS During stage 2, PLRM at a 30° angle significantly increased CO (mean ± standard deviation, 1.0 ± 0.1 to 1.3 ± 0.1 L minute-1; p < 0.001), with a simultaneous significant reduction in PVI (38 ± 4% to 21 ± 4%; p < 0.001) and PPV (27 ± 2% to 18 ± 2%; p < 0.001). The PLRM did not affect CO, PPV and PVI during stages 1, 3 and 4. CONCLUSIONS AND CLINICAL RELEVANCE In anesthetized dogs, PLRM at a 30° angle successfully detected FR during hypovolemia, and identified fluid nonresponsiveness during normovolemia and hypervolemia. Also, in hypovolemic dogs, significant decreases in PVI and PPV occurred in response to PLRM maneuver.
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De Backer D, Aissaoui N, Cecconi M, Chew MS, Denault A, Hajjar L, Hernandez G, Messina A, Myatra SN, Ostermann M, Pinsky MR, Teboul JL, Vignon P, Vincent JL, Monnet X. How can assessing hemodynamics help to assess volume status? Intensive Care Med 2022; 48:1482-1494. [PMID: 35945344 PMCID: PMC9363272 DOI: 10.1007/s00134-022-06808-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/25/2022] [Indexed: 02/04/2023]
Abstract
In critically ill patients, fluid infusion is aimed at increasing cardiac output and tissue perfusion. However, it may contribute to fluid overload which may be harmful. Thus, volume status, risks and potential efficacy of fluid administration and/or removal should be carefully evaluated, and monitoring techniques help for this purpose. Central venous pressure is a marker of right ventricular preload. Very low values indicate hypovolemia, while extremely high values suggest fluid harmfulness. The pulmonary artery catheter enables a comprehensive assessment of the hemodynamic profile and is particularly useful for indicating the risk of pulmonary oedema through the pulmonary artery occlusion pressure. Besides cardiac output and preload, transpulmonary thermodilution measures extravascular lung water, which reflects the extent of lung flooding and assesses the risk of fluid infusion. Echocardiography estimates the volume status through intravascular volumes and pressures. Finally, lung ultrasound estimates lung edema. Guided by these variables, the decision to infuse fluid should first consider specific triggers, such as signs of tissue hypoperfusion. Second, benefits and risks of fluid infusion should be weighted. Thereafter, fluid responsiveness should be assessed. Monitoring techniques help for this purpose, especially by providing real time and precise measurements of cardiac output. When decided, fluid resuscitation should be performed through fluid challenges, the effects of which should be assessed through critical endpoints including cardiac output. This comprehensive evaluation of the risk, benefits and efficacy of fluid infusion helps to individualize fluid management, which should be preferred over a fixed restrictive or liberal strategy.
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Affiliation(s)
- Daniel De Backer
- Department of Intensive Care, CHIREC Hospitals, Université Libre de Bruxelles, Boulevard du Triomphe 201, 1160, Brussels, Belgium.
| | - Nadia Aissaoui
- Assistance publique des hôpitaux de Paris (APHP), Cochin Hospital, Intensive Care Medicine, médecine interne reanimation, Université de Paris and Paris Cardiovascular Research Center, INSERM U970, 25 rue Leblanc, 75015, Paris, France
| | - Maurizio Cecconi
- Humanitas Clinical and Research Center-IRCCS, Rozzano, MI, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, MI, Italy
| | - Michelle S Chew
- Department of Anaesthesia and Intensive Care, Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - André Denault
- Department of Anesthesiology, Montreal Heart Institute, Université de Montréal, Montreal, QC, Canada.,Critical Care Division, Montreal Heart Institute, Université de Montréal, Montreal, QC, Canada
| | - Ludhmila Hajjar
- Departamento de Cardiopneumologia, InCor, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Glenn Hernandez
- Departamento de Medicina Intensiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Antonio Messina
- Humanitas Clinical and Research Center-IRCCS, Rozzano, MI, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, MI, Italy
| | - Sheila Nainan Myatra
- Department of Anaesthesiology, Critical Care and Pain, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, India
| | - Marlies Ostermann
- Department of Intensive Care, King's College London, Guy's & St Thomas' Hospital, London, UK
| | - Michael R Pinsky
- Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jean-Louis Teboul
- AP-HP, Service de médecine intensive-réanimation, Hôpital de Bicêtre, DMU 4 CORREVE, Inserm UMR S_999, FHU SEPSIS, CARMAS, Université Paris-Saclay, 78 rue du Général Leclerc, 94270, Le Kremlin-Bicêtre, France
| | - Philippe Vignon
- Medical-surgical ICU and Inserm CIC 1435, Dupuytren Teaching Hospital, 87000, Limoges, France
| | - Jean-Louis Vincent
- Department of Intensive Care, Erasme Univ Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Xavier Monnet
- AP-HP, Service de médecine intensive-réanimation, Hôpital de Bicêtre, DMU 4 CORREVE, Inserm UMR S_999, FHU SEPSIS, CARMAS, Université Paris-Saclay, 78 rue du Général Leclerc, 94270, Le Kremlin-Bicêtre, France
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Capnography for Monitoring of the Critically Ill Patient. Clin Chest Med 2022; 43:393-400. [PMID: 36116809 DOI: 10.1016/j.ccm.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Capnography has been widely adopted in multiple clinical areas. The capnogram and end-tidal carbon dioxide offer a wealth of information, in the right clinical setting, and when properly interpreted. In this article, the authors aim to review the most common clinical scenarios during which capnography has been shown to be of benefit. This includes the areas of fluid responsiveness, cardiopulmonary resuscitation, and conscious sedation. They review the published literature, highlighting its pitfalls and identifying its limitations.
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Monnet X, Shi R, Teboul JL. Prediction of fluid responsiveness. What’s new? Ann Intensive Care 2022; 12:46. [PMID: 35633423 PMCID: PMC9148319 DOI: 10.1186/s13613-022-01022-8] [Citation(s) in RCA: 71] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 05/09/2022] [Indexed: 02/07/2023] Open
Abstract
AbstractAlthough the administration of fluid is the first treatment considered in almost all cases of circulatory failure, this therapeutic option poses two essential problems: the increase in cardiac output induced by a bolus of fluid is inconstant, and the deleterious effects of fluid overload are now clearly demonstrated. This is why many tests and indices have been developed to detect preload dependence and predict fluid responsiveness. In this review, we take stock of the data published in the field over the past three years. Regarding the passive leg raising test, we detail the different stroke volume surrogates that have recently been described to measure its effects using minimally invasive and easily accessible methods. We review the limits of the test, especially in patients with intra-abdominal hypertension. Regarding the end-expiratory occlusion test, we also present recent investigations that have sought to measure its effects without an invasive measurement of cardiac output. Although the limits of interpretation of the respiratory variation of pulse pressure and of the diameter of the vena cava during mechanical ventilation are now well known, several recent studies have shown how changes in pulse pressure variation itself during other tests reflect simultaneous changes in cardiac output, allowing these tests to be carried out without its direct measurement. This is particularly the case during the tidal volume challenge, a relatively recent test whose reliability is increasingly well established. The mini-fluid challenge has the advantage of being easy to perform, but it requires direct measurement of cardiac output, like the classic fluid challenge. Initially described with echocardiography, recent studies have investigated other means of judging its effects. We highlight the problem of their precision, which is necessary to evidence small changes in cardiac output. Finally, we point out other tests that have appeared more recently, such as the Trendelenburg manoeuvre, a potentially interesting alternative for patients in the prone position.
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Huang H, Wu C, Shen Q, Fang Y, Xu H. Value of variation of end-tidal carbon dioxide for predicting fluid responsiveness during the passive leg raising test in patients with mechanical ventilation: a systematic review and meta-analysis. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2022; 26:20. [PMID: 35031070 PMCID: PMC8760720 DOI: 10.1186/s13054-022-03890-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/08/2022] [Indexed: 01/06/2023]
Abstract
Background The ability of end-tidal carbon dioxide (ΔEtCO2) for predicting fluid responsiveness has been extensively studied with conflicting results. This meta-analysis aimed to explore the value of ΔEtCO2 for predicting fluid responsiveness during the passive leg raising (PLR) test in patients with mechanical ventilation. Methods PubMed, Embase, and Cochrane Central Register of Controlled Trials were searched up to November 2021. The diagnostic odds ratio (DOR), sensitivity, and specificity were calculated. The summary receiver operating characteristic curve was estimated, and the area under the curve (AUROC) was calculated. Q test and I2 statistics were used for study heterogeneity and publication bias was assessed by Deeks’ funnel plot asymmetry test. We performed meta-regression analysis for heterogeneity exploration and sensitivity analysis for the publication bias. Results Overall, six studies including 298 patients were included in this review, of whom 149 (50%) were fluid responsive. The cutoff values of ΔEtCO2 in four studies was 5%, one was 5.8% and the other one was an absolute increase 2 mmHg. Heterogeneity between studies was assessed with an overall Q = 4.098, I2 = 51%, and P = 0.064. The pooled sensitivity and specificity for the overall population were 0.79 (95% CI 0.72–0.85) and 0.90 (95% CI 0.77–0.96), respectively. The DOR was 35 (95% CI 12–107). The pooled AUROC was 0.81 (95% CI 0.77–0.84). On meta-regression analysis, the number of patients was sources of heterogeneity. The sensitivity analysis showed that the pooled DOR ranged from 21 to 140 and the pooled AUC ranged from 0.92 to 0.96 when one study was omitted. Conclusions Though the limited number of studies included and study heterogeneity, our meta-analysis confirmed that the ΔEtCO2 performed moderately in predicting fluid responsiveness during the PLR test in patients with mechanical ventilation.
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Affiliation(s)
- Haijun Huang
- Department of Emergency, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310018, Zhejiang, China
| | - Chenxia Wu
- Department of Emergency, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310018, Zhejiang, China
| | - Qinkang Shen
- Department of Emergency, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310018, Zhejiang, China
| | - Yixin Fang
- Department of Emergency, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310018, Zhejiang, China
| | - Hua Xu
- Department of Emergency, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310018, Zhejiang, China.
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Ma GG, Xu LY, Luo JC, Hou JY, Hao GW, Su Y, Liu K, Yu SJ, Tu GW, Luo Z. Change in left ventricular velocity time integral during Trendelenburg maneuver predicts fluid responsiveness in cardiac surgical patients in the operating room. Quant Imaging Med Surg 2021; 11:3133-3145. [PMID: 34249640 PMCID: PMC8250022 DOI: 10.21037/qims-20-700] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 03/03/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND Fluid responsiveness is an important topic for clinicians. We investigated whether changes in left ventricular outflow tract (LVOT) velocity time integral (VTI) during a Trendelenburg position (TP) maneuver can predict fluid responsiveness as a non-invasive marker in coronary artery bypass graft (CABG) surgery patients in the operating room. METHODS This prospective, single-center observational study, performed in the operating room, enrolled 65 elective CABG patients. Hemodynamic data coupled with transesophageal echocardiography monitoring of the LVOT VTI and the peak velocity were collected at each step [baseline 1, TP, baseline 2 and fluid challenge (FC)]. Patients whose VTI increased ≥15% after FC (500 mL of Gelofusine infusion within 30 min) were considered responders. RESULTS Twenty-eight (43.1%) patients were responders to fluid administration. VTI changes during the TP maneuver predicted fluid responsiveness with an area under the receiver operating characteristic curve (AUC) of 0.90 (95% CI, 0.79-0.96), with a sensitivity of 100%, and a specificity of 70% at a threshold of 10% (gray zone, 8-15%). The increase in VTI during the TP was correlated with the VTI changes induced by FC (r=0.61, P<0.0001). Changes in peak velocity and pulse pressure during the TP were poorly predictive of fluid responsiveness, with an AUC of 0.72 (95% CI: 0.60-0.82) and 0.66 (95% CI: 0.53-0.77), respectively. CONCLUSIONS An increase in VTI induced by the TP could predict fluid responsiveness in CABG patients in the operating room. However, changes in peak velocity and pulse pressure stimulated by the TP could not reliably predict fluid responsiveness.
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Affiliation(s)
- Guo-Guang Ma
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
- Center of Critical Care Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Li-Ying Xu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jing-Chao Luo
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jun-Yi Hou
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Guang-Wei Hao
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ying Su
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Kai Liu
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Shen-Ji Yu
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Guo-Wei Tu
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhe Luo
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
- Department of Critical Care Medicine, Xiamen Branch, Zhongshan Hospital, Fudan University, Xiamen, China
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Baloch K, Rehman Memon A, Ikhlaq U, Umair M, Ansari MI, Abubaker J, Salahuddin N. Assessing the Utility of End-Tidal Carbon Dioxide as a Marker for Fluid Responsiveness in Cardiogenic Shock. Cureus 2021; 13:e13164. [PMID: 33692926 PMCID: PMC7938016 DOI: 10.7759/cureus.13164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background Preventing end-organ failure in patients with shock requires rapid and easily accessible measurements of fluid responsiveness. Unlike septic shock, not all patients in cardiogenic shock are preload responsive. We conducted this study to determine the discriminant power of changes in end-tidal carbon dioxide (ETCO2), systolic blood pressure (SBP), inferior vena cava (IVC) collapsibility index (IVC-CI), and venous to arterial carbon dioxide (Pv-aCO2) gap after a fluid challenge and compared it to increases in cardiac output. Methodology In a prospective, quasi-experimental design, mechanically ventilated patients in cardiogenic shock were assessed for fluid responsiveness by comparing improvement in cardiac output (velocity time integral) with changes in ETCO2, heart rate, SBP, Pv-aCO2 gap, IVC-CI after a fluid challenge (a crystalloid bolus or passive leg raise). Results Out of 60 patients, with mean age 61.3 ± 14.8 years, mean acute physiology and chronic health evaluation (APACHE) score 14.82 ± 7.49, and median ejection fraction (EF) 25% (25-35), 36.7% (22) had non ST-segment elevation myocardial infarction (NSTEMI) and 60% (36) were ST-segment elevation myocardial infarction (STEMI). ETCO2 was the best predictor of fluid responsiveness; area under the curve (AUC) 0.705 (95% confidence interval (CI) 0.57-0.83), p=0.007, followed by reduction in Pv-aCO2 gap; AUC 0.598 (95% CI; 0.45-0.74), p= 0.202. Changes in SBP, mean arterial pressure (MAP), IVC-CI weren’t significant; 0.431 (p=0.367), 0.437 (p=0.410), 0.569 (p=0.367) respectively. The discriminant value identified for ETCO2 was more than equal to 2 mmHg, with sensitivity 58.6%, specificity 80.7%, positive predictive value 73.9% [95% CI; 56.5% to 86.1%], negative predictive value 69.7% [95% CI; 56.7% to 76.9%]. Conclusions Change in ETCO2 is a useful bedside test to predict fluid responsiveness in cardiogenic shock.
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Affiliation(s)
- Komal Baloch
- Critical Care Medicine, National Institute of Cardiovascular Diseases (NICVD), Karachi, PAK
| | - Aziz Rehman Memon
- Critical Care Medicine, National Institute of Cardiovascular Diseases (NICVD), Karachi, PAK
| | - Urwah Ikhlaq
- Critical Care Medicine, National Institute of Cardiovascular Diseases (NICVD), Karachi, PAK
| | - Madiha Umair
- Critical Care Medicine, National Institute of Cardiovascular Diseases (NICVD), Karachi, PAK
| | - Muhammad Imran Ansari
- Critical Care Medicine, National Institute of Cardiovascular Diseases (NICVD), Karachi, PAK
| | - Jawed Abubaker
- Internal Medicine, National Institute of Cardiovascular Diseases (NICVD), Karachi, PAK
| | - Nawal Salahuddin
- Critical Care Medicine, National Institute of Cardiovascular Diseases (NICVD), Karachi, PAK
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de Courson H, Chauvet J, Le Gall L, Georges D, Boyer P, Verchère E, Nouette-Gaulain K, Biais M. Utility of changes in end-tidal carbon dioxide after volume expansion to assess fluid responsiveness in the operating room: a prospective observational study. Br J Anaesth 2020; 125:672-679. [DOI: 10.1016/j.bja.2020.07.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 07/09/2020] [Accepted: 07/11/2020] [Indexed: 12/12/2022] Open
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Güney Pınar S, Pekdemir M, Özturan İU, Doğan NÖ, Yaka E, Yılmaz S, Karadaş A, Ferek Emir D. Assessment of end-tidal carbon dioxide and vena cava collapsibility in volume responsiveness in spontaneously breathing patients. Med Klin Intensivmed Notfmed 2020; 117:34-40. [PMID: 33103218 DOI: 10.1007/s00063-020-00749-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/06/2020] [Accepted: 09/16/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND The benefit of end-tidal carbon dioxide (ETCO2) and inferior vena cava collapsibility index (IVCCI) in predicting fluid responsiveness in mechanically ventilated patients has been demonstrated. However, the data on spontaneously breathing patients is controversial. This study aims to investigate the accuracy of variations in the ETCO2 (∆ETCO2) and IVCCI (∆IVCCI) gradient in predicting volume responsiveness in spontaneously breathing patients with hypovolemia. METHODS This was a prospective observational study conducted in an academic emergency department (ED). Spontaneously breathing patients who required fluid resuscitation due to hypovolemia were included in the study. Cardiac output (CO), IVCCI and ETCO2 were measured before and after the passive leg raise (PRL). A change in the CO of ≥15% after the PLR were considered volume responsive. The difference in the ∆ETCO2 and ∆IVCCI were compared between the volume responsive and nonresponsive groups. RESULTS A total of 31 patients were included in the study, of whom 15 patients were volume responsive. The difference in the ∆ETCO2 was 4 mm Hg in the volume responsive and 2 mm Hg in the nonresponsive group (p = 0.02). There was no significant difference in ∆IVCCI between the groups. A moderate correlation was detected between the difference in ∆ETCO2 and CO (0.585; p = 0.001). CONCLUSION ∆ETCO2 can be an alternative method in predicting volume responsiveness in spontaneously breathing patients with hypovolemia.
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Affiliation(s)
- S Güney Pınar
- Faculty of Medicine, Department of Emergency Medicine, Kocaeli University, 41700, Kocaeli, Turkey
| | - M Pekdemir
- Faculty of Medicine, Department of Emergency Medicine, Kocaeli University, 41700, Kocaeli, Turkey
| | - İ U Özturan
- Faculty of Medicine, Department of Emergency Medicine, Kocaeli University, 41700, Kocaeli, Turkey.
| | - N Ö Doğan
- Faculty of Medicine, Department of Emergency Medicine, Kocaeli University, 41700, Kocaeli, Turkey
| | - E Yaka
- Faculty of Medicine, Department of Emergency Medicine, Kocaeli University, 41700, Kocaeli, Turkey
| | - S Yılmaz
- Faculty of Medicine, Department of Emergency Medicine, Kocaeli University, 41700, Kocaeli, Turkey
| | - A Karadaş
- Faculty of Medicine, Department of Emergency Medicine, Kocaeli University, 41700, Kocaeli, Turkey
| | - D Ferek Emir
- Faculty of Medicine, Department of Emergency Medicine, Kocaeli University, 41700, Kocaeli, Turkey
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Ünlüer EE, Karagöz A, Bayata S, Çatalkaya S, Bozdemir H. A novel prediction of simulated fluid responsiveness by echocardiography assessment of tricuspid annulus tissue velocity with passive leg raising. HONG KONG J EMERG ME 2020. [DOI: 10.1177/1024907919844064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Fluid responsiveness can be predicted by the effect of passive leg raising on cardiac output. Objectives: This research aimed to compare the changes in cardiac output and the peak systolic velocity values of Tricuspid annulus velocity at the free wall (S’) before and after passive leg raising in healthy volunteers. Methods: The study was approved by ethical commission. The desired sample size was 28, and 57 volunteers were included after they signed informed consent. The first measurements, including vital signs, S’, and cardiac output, were taken with the participants lying supine and were performed in the morning after 12 h fast. The participants were then asked to lie in a semirecumbent position for 3 min. After 3 min, the head of the bed was lowered to the supine position and the participants’ legs were elevated at 45°. Secondary measurements were repeated in this position. The differences between vital signs, cardiac output, and S’ measurements before and after passive leg raising were statistically compared. The level of significance was set as p < 0.05. Results: The mean values of cardiac output and S’ before passive leg raising was 9.59 L/min and 11.57 cm/s, respectively; however, those increased to 11.44 L/min and 13.72 cm/s after passive leg raising. The average increases were 16.17% for cardiac output and 15.67% for S’. The changes of cardiac output and S’ were statistically significant. The changes of vital signs before and after passive leg raising were statistically insignificant. Conclusion: This study has demonstrated the concordance of rise in cardiac output with S’ change by passive leg raising in healthy subjects. Further studies are needed to validate the use of S’ values in critically ill subjects.
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Affiliation(s)
- Erden Erol Ünlüer
- Department of Emergency Medicine, Faculty of Medicine, Uşak University, Uşak, Turkey
| | - Arif Karagöz
- Department of Emergency Medicine, İzmir Ciğli Training Hospital, İzmir, Turkey
| | - Serdar Bayata
- Department of Cardiology, Atatürk Training and Research Hospital, İzmir Katip Çelebi University, İzmir, Turkey
| | - Sibel Çatalkaya
- Department of Cardiology, Faculty of Medicine, Uşak University, Uşak, Turkey
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Falempin AS, Pereira B, Binakdane F, Bazin JE, Smirdec M. Investigator-initiated, multicentre, open-label, two-arm, randomised controlled trial comparing intubating conditions in 25° head-up position and supine: the InSize25 study protocol. BMJ Open 2019; 9:e029761. [PMID: 31685496 PMCID: PMC6858095 DOI: 10.1136/bmjopen-2019-029761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION Difficult airway management during tracheal intubation can lead to severe hypoxic sequelae. Routine intubation practice is to use a strict supine position, whereas a 25° head-up or reverse Trendelenburg position increases efficacy of preoxygenation, seems more comfortable for the anaesthetist and may also provide better intubation conditions in direct laryngoscopy. The 25° head-up position could be used for the whole population rather than only for obese patients, but there is no prospective randomised controlled trial with a robust design and large number of patients comparing strict supine against 25° intubation in operating room. The objective of the InSize25 study is to test the effect of these two patient positions on intubation conditions during laryngoscopy in scheduled surgery on non-obese patients. METHODS AND ANALYSIS InSize25 is an investigator-initiated, multicentre, open-label, two-arm, randomised controlled trial. The InSize25 study will randomise 1000 adult patients scheduled for surgery under general anaesthesia requiring intubation with neuromuscular-blocking drugs, candidates for direct laryngoscopy. The primary outcome variable is the view obtained during the first laryngoscopy without any external manipulation assessed using percentage of glottic opening. Important secondary outcomes are: Cormack-Lehane classification, number of attempts at laryngoscopy and at tracheal intubation, use of ancillary equipment (eg, bougies, alternative laryngoscope blades, videolaryngoscope) and manoeuvres (eg, laryngeal manipulation), comfort score for the anaesthetist, episodes of postinduction hypotension or desaturation and mechanical complications of intubation. ETHICS AND DISSEMINATION The trial received appropriate approval from the 'CPP Sud-Est II' ethical review board. Informed consent is required. If the 25° head-up position proves superior for tracheal intubation without more complications, it may become the routine-standard intubation position rather than only for use with obese patients. The final results will be published in a peer-reviewed journal. TRIAL REGISTRATION NUMBER Clinicaltrials.gov identifier (NCT03339141).
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Affiliation(s)
- Anne-Sophie Falempin
- Department of Perioperative Medicine, University Hospital-Clermont-Ferrand, Clermont-Ferrand Cedex 1, France
| | - Bruno Pereira
- Biostatistics Unit of the Department of Clinical Research and Innovation (DRCI), University Hospital CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Fatima Binakdane
- Department of Anaesthesia and Surgery Critical Care, Saint-Louis Hospital, Assistance Publique-Hopitaux de Paris, Paris, France
| | - Jean-Etienne Bazin
- Department of Perioperative Medicine, Centre Hospitalier Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - Margot Smirdec
- University Hospital-Clermont-Ferrand, Clermont-Ferrand Cedex 1, France
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Korkut S, Ünlüer EE, Karagöz A, Mnif KB, Kadioğlu E. Comparison of end-tidal carbon dioxide and point-of-care echocardiography for fluid response at the bedside. HONG KONG J EMERG ME 2019. [DOI: 10.1177/1024907919870929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Purpose: In this study, we aimed to compare cardiac output, echocardiographic pulmonary velocity-time integral, and end-tidal carbon dioxide values before and after the passive leg raising maneuver in healthy volunteers. Methods: The Ethical Commission approved the study. A total of 36 volunteers were included after signed informed consent in our study. After 12 h of fasting, vital signs, cardiac output, pulmonary velocity-time integral, and end-tidal carbon dioxide were measured when the participants were lying supine. Then, participants’ legs were elevated to 45° passively, and all measurements were repeated. Pulmonary velocity-time integral was obtained in parasternal short-axis view with the aid of pulse Doppler. Pulmonary root measurements were recorded. Echocardiographic stroke volume and cardiac output were calculated. The differences between values of cardiac output, pulmonary velocity-time integral, and end-tidal carbon dioxide before and after passive leg raising were statistically compared. The level of significance was accepted as p < 0.05. Results: Significant differences were found between pre- and post-passive leg raising values of these three measurements. The effect of passive leg raising on pulmonary velocity-time integral measurements was greater. The change in end-tidal carbon dioxide was not correlated with either cardiac output or pulmonary velocity-time integral alteration. Conclusion: Our results showed that measurement of pulmonary velocity-time integral changes after passive leg raising is a more useful bedside method to predict fluid responsiveness than measurement of end-tidal carbon dioxide and cardiac output alteration.
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Affiliation(s)
- Semih Korkut
- Emergency Health Services, Turkish Ministry of Health, Ankara, Turkey
| | - Erden Erol Ünlüer
- Department of Emergency Medicine, University of Health Sciences, Bozyaka Training and Research Hospital, İzmir, Turkey
- Department of Emergency Medicine, Faculty of Medicine, Uşak University, Uşak, Turkey
| | - Arif Karagöz
- Department of Emergency Medicine, İzmir Çiğli Training Hospital, İzmir, Turkey
| | | | - Emine Kadioğlu
- Department of Emergency Medicine, Faculty of Medicine, Kütahya University of Health Sciences, Kütahya, Turkey
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Denault A, Shaaban Ali M, Couture EJ, Beaubien-Souligny W, Bouabdallaoui N, Brassard P, Mailhot T, Jacquet-Lagrèze M, Lamarche Y, Deschamps A. A Practical Approach to Cerebro-Somatic Near-Infrared Spectroscopy and Whole-Body Ultrasound. J Cardiothorac Vasc Anesth 2019; 33 Suppl 1:S11-S37. [DOI: 10.1053/j.jvca.2019.03.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Predicting fluid responsiveness: A review of literature and a guide for the clinician. Am J Emerg Med 2018; 36:2093-2102. [DOI: 10.1016/j.ajem.2018.08.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 07/27/2018] [Accepted: 08/13/2018] [Indexed: 01/04/2023] Open
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22
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Pybus DA. Real-time, spectral analysis of the arterial pressure waveform using a wirelessly-connected, tablet computer: a pilot study. J Clin Monit Comput 2018; 33:53-63. [PMID: 29705865 PMCID: PMC6314984 DOI: 10.1007/s10877-018-0145-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 04/23/2018] [Indexed: 11/26/2022]
Abstract
Spectral analysis of the arterial pressure waveform, using specialized hardware, has been used for the retrospective calculation of the 'Spectral Peak Ratio' (SPeR) of the respiratory and cardiac arterial spectral peaks. The metric can quantify the cardiovascular response to volume loading by analysing the effect of changing tidal volume (indexed to body weight) (VTI) on pulse pressure variability. In this pilot study, the feasibility of real-time SPeR calculation, using a mobile computer which was wirelessly connected to the patient monitor, was evaluated by examining the determinants of SPeR in 60 cardiac-surgical patients. In 30 patients undergoing aortic valve replacement (AVR), graded cyclical changes in ventricular loading were induced by increasing VTI over 2 min, while performing spectral analysis at 1 Hz, before and after AVR. A strong, linear correlation between SPeR and VTI was found and the slope of the regression line (β) changed significantly after AVR. The change in β correlated with the width of the preoperative vena contracta. In another 30 patients, SPeR at constant VTI was calculated at 1 Hz during passive leg raising. β fell significantly on leg raising. The mean arterial pressure change during the manoeuvre was linearly related to the change in β. Real-time spectral analysis of the arterial waveform was easily accomplished. The regression of SPeR on VTI was linear. β appeared to represent the slope of the cardiac response curve at the venous return curve equilibrium point. Measurements were possible at a significantly lower VTI than the equivalent time domain metrics.
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Affiliation(s)
- David Andrew Pybus
- St. George Private Hospital, 1 South St., Kogarah, NSW, 2217, Australia.
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Long B, Koyfman A, Vivirito MA. Capnography in the Emergency Department: A Review of Uses, Waveforms, and Limitations. J Emerg Med 2017; 53:829-842. [PMID: 28993038 DOI: 10.1016/j.jemermed.2017.08.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 08/11/2017] [Indexed: 01/12/2023]
Abstract
BACKGROUND Capnography has many uses in the emergency department (ED) and critical care setting, most commonly cardiac arrest and procedural sedation. OBJECTIVE OF THE REVIEW This review evaluates several indications concerning capnography beyond cardiac arrest and procedural sedation in the ED, as well as limitations and specific waveforms. DISCUSSION Capnography includes the noninvasive measurement of CO2, providing information on ventilation, perfusion, and metabolism in intubated and spontaneously breathing patients. Since the 1990s, capnography has been utilized extensively for cardiac arrest and procedural sedation. Qualitative capnography includes a colorimetric device, changing color on the amount of CO2 present. Quantitative capnography provides a numeric value (end-tidal CO2), and capnography most commonly includes a waveform as a function of time. Conditions in which capnography is informative include cardiac arrest, procedural sedation, mechanically ventilated patients, and patients with metabolic acidemia. Patients with seizure, trauma, and respiratory conditions, such as pulmonary embolism and obstructive airway disease, can benefit from capnography, but further study is needed. Limitations include use of capnography in conditions with mixed pathophysiology, patients with low tidal volumes, and equipment malfunction. Capnography should be used in conjunction with clinical assessment. CONCLUSIONS Capnography demonstrates benefit in cardiac arrest, procedural sedation, mechanically ventilated patients, and patients with metabolic acidemia. Further study is required in patients with seizure, trauma, and respiratory conditions. It should only be used in conjunction with other patient factors and clinical assessment.
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Affiliation(s)
- Brit Long
- Department of Emergency Medicine, San Antonio Military Medical Center, Fort Sam Houston, Texas
| | - Alex Koyfman
- Department of Emergency Medicine, The University of Texas Southwestern Medical Center, Dallas, Texas
| | - Michael A Vivirito
- Department of Emergency Medicine, Joint Base Elmendorf-Richardson Medical Center, Joint Base Elmendorf-Richardson, Alaska
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Assessment of fluid responsiveness with end-tidal carbon dioxide using a simplified passive leg-raising maneuver: a prospective observational study. Can J Anaesth 2017; 64:546. [DOI: 10.1007/s12630-017-0847-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 12/27/2016] [Accepted: 02/13/2017] [Indexed: 11/25/2022] Open
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