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Werner P, Winter M, Mahr S, Stelzmueller ME, Zimpfer D, Ehrlich M. Cerebral Protection Strategies in Aortic Arch Surgery-Past Developments, Current Evidence, and Future Innovation. Bioengineering (Basel) 2024; 11:775. [PMID: 39199732 PMCID: PMC11351742 DOI: 10.3390/bioengineering11080775] [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: 05/22/2024] [Revised: 07/18/2024] [Accepted: 07/26/2024] [Indexed: 09/01/2024] Open
Abstract
Surgery of the aortic arch remains a complex procedure, with neurological events such as stroke remaining its most dreaded complications. Changes in surgical technique and the continuous innovation in neuroprotective strategies have led to a significant decrease in cerebral and spinal events. Different modes of cerebral perfusion, varying grades of hypothermia, and a number of pharmacological strategies all aim to reduce hypoxic and ischemic cerebral injury, yet there is no evidence indicating the clear superiority of one method over another. While surgical results continue to improve, novel hybrid and interventional techniques are just entering the stage and the question of optimal neuroprotection remains up to date. Within this perspective statement, we want to shed light on the current evidence and controversies of cerebral protection in aortic arch surgery, as well as what is on the horizon in this fast-evolving field. We further present our institutional approach as a large tertiary aortic reference center.
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Affiliation(s)
- Paul Werner
- Correspondence: (P.W.); (M.W.); Tel.: +431-40400-69890 (P.W.)
| | - Martin Winter
- Correspondence: (P.W.); (M.W.); Tel.: +431-40400-69890 (P.W.)
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2
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Guo Y, Yang C, Zhu W, Zhao R, Ren K, Duan W, Liu J, Ma J, Chen X, Liu B, Xu C, Jin Z, Shi X. Electrical impedance tomography provides information of brain injury during total aortic arch replacement through its correlation with relative difference of neurological biomarkers. Sci Rep 2024; 14:14236. [PMID: 38902461 PMCID: PMC11190256 DOI: 10.1038/s41598-024-65203-0] [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: 10/17/2023] [Accepted: 06/18/2024] [Indexed: 06/22/2024] Open
Abstract
Postoperative neurological dysfunction (PND) is one of the most common complications after a total aortic arch replacement (TAAR). Electrical impedance tomography (EIT) monitoring of cerebral hypoxia injury during TAAR is a promising technique for preventing the occurrence of PND. This study aimed to explore the feasibility of electrical impedance tomography (EIT) for warning of potential brain injury during total aortic arch replacement (TAAR) through building the correlation between EIT extracted parameters and variation of neurological biomarkers in serum. Patients with Stanford type A aortic dissection and requiring TAAR who were admitted between December 2021 to March 2022 were included. A 16-electrode EIT system was adopted to monitor each patient's cerebral impedance intraoperatively. Five parameters of EIT signals regarding to the hypothermic circulatory arrest (HCA) period were extracted. Meanwhile, concentration of four neurological biomarkers in serum were measured regarding to time before and right after surgery, 12 h, 24 h and 48 h after surgery. The correlation between EIT parameters and variation of serum biomarkers were analyzed. A total of 57 TAAR patients were recruited. The correlation between EIT parameters and variation of biomarkers were stronger for patients with postoperative neurological dysfunction (PND(+)) than those without postoperative neurological dysfunction (PND(-)) in general. Particularly, variation of S100B after surgery had significantly moderate correlation with two parameters regarding to the difference of impedance between left and right brain which were MRAIabs and TRAIabs (0.500 and 0.485 with p < 0.05, respectively). In addition, significantly strong correlations were seen between variation of S100B at 24 h and the difference of average resistivity value before and after HCA phase (ΔARVHCA), the slope of electrical impedance during HCA (kHCA) and MRAIabs (0.758, 0.758 and 0.743 with p < 0.05, respectively) for patients with abnormal S100B level before surgery. Strong correlations were seen between variation of TAU after surgery and ΔARVHCA, kHCA and the time integral of electrical impedance for half flow of perfusion (TARVHP) (0.770, 0.794 and 0.818 with p < 0.01, respectively) for patients with abnormal TAU level before surgery. Another two significantly moderate correlations were found between TRAIabs and variation of GFAP at 12 h and 24 h (0.521 and 0.521 with p < 0.05, respectively) for patients with a normal GFAP serum level before surgery. The correlations between EIT parameters and serum level of neurological biomarkers were significant in patients with PND, especially for MRAIabs and TRAIabs, indicating that EIT may become a powerful assistant for providing a real-time warning of brain injury during TAAR from physiological perspective and useful guidance for intensive care units.
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Affiliation(s)
- Yitong Guo
- Shaanxi Provincial Key Laboratory of Bioelectromagnetic Detection and Intelligent Perception, Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, 710032, China
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Medical University, Xi'an, 710038, China
| | - Chen Yang
- Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Wenjing Zhu
- Shaanxi Provincial Key Laboratory of Bioelectromagnetic Detection and Intelligent Perception, Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, 710032, China
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Rong Zhao
- Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Kai Ren
- Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Weixun Duan
- Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Jincheng Liu
- Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Jing Ma
- Shaanxi Provincial Key Laboratory of Bioelectromagnetic Detection and Intelligent Perception, Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, 710032, China
| | - Xiuming Chen
- Shaanxi Provincial Key Laboratory of Bioelectromagnetic Detection and Intelligent Perception, Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, 710032, China
- UTRON Technology Co., Ltd., Hangzhou, 310051, China
| | - Benyuan Liu
- Shaanxi Provincial Key Laboratory of Bioelectromagnetic Detection and Intelligent Perception, Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, 710032, China
| | - Canhua Xu
- Shaanxi Provincial Key Laboratory of Bioelectromagnetic Detection and Intelligent Perception, Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, 710032, China
| | - Zhenxiao Jin
- Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China.
| | - Xuetao Shi
- Shaanxi Provincial Key Laboratory of Bioelectromagnetic Detection and Intelligent Perception, Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, 710032, China.
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Louvaris Z, Van Hollebeke M, Poddighe D, Meersseman P, Wauters J, Wilmer A, Gosselink R, Langer D, Hermans G. Do Cerebral Cortex Perfusion, Oxygen Delivery, and Oxygen Saturation Responses Measured by Near-Infrared Spectroscopy Differ Between Patients Who Fail or Succeed in a Spontaneous Breathing Trial? A Prospective Observational Study. Neurocrit Care 2023; 38:105-117. [PMID: 36450970 PMCID: PMC9713166 DOI: 10.1007/s12028-022-01641-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 11/07/2022] [Indexed: 12/04/2022]
Abstract
BACKGROUND Alterations in perfusion to the brain during the transition from mechanical ventilation (MV) to a spontaneous breathing trial (SBT) remain poorly understood. The aim of the study was to determine whether changes in cerebral cortex perfusion, oxygen delivery (DO2), and oxygen saturation (%StiO2) during the transition from MV to an SBT differ between patients who succeed or fail an SBT. METHODS This was a single-center prospective observational study conducted in a 16-bed medical intensive care unit of the University Hospital Leuven, Belgium. Measurements were performed in 24 patients receiving MV immediately before and at the end of a 30-min SBT. Blood flow index (BFI), DO2, and %StiO2 in the prefrontal cortex, scalene, rectus abdominis, and thenar muscle were simultaneously assessed by near-infrared spectroscopy using the tracer indocyanine green dye. Cardiac output, arterial blood gases, and systemic oxygenation were also recorded. RESULTS During the SBT, prefrontal cortex BFI and DO2 responses did not differ between SBT-failure and SBT-success groups (p > 0.05). However, prefrontal cortex %StiO2 decreased in six of eight patients (75%) in the SBT-failure group (median [interquartile range 25-75%]: MV = 57.2% [49.1-61.7] vs. SBT = 51.0% [41.5-62.5]) compared to 3 of 16 patients (19%) in the SBT-success group (median [interquartile range 25-75%]: MV = 65.0% [58.6-68.5] vs. SBT = 65.1% [59.5-71.1]), resulting in a significant differential %StiO2 response between groups (p = 0.031). Similarly, a significant differential response in thenar muscle %StiO2 (p = 0.018) was observed between groups. A receiver operating characteristic analysis identified a decrease in prefrontal cortex %StiO2 > 1.6% during the SBT as an optimal cutoff, with a sensitivity of 94% and a specificity of 75% to predict SBT failure and an area under the curve of 0.79 (95% CI: 0.55-1.00). Cardiac output, systemic oxygenation, scalene, and rectus abdominis BFI, DO2, and %StiO2 responses did not differ between groups (p > 0.05); however, during the SBT, a significant positive association in prefrontal cortex BFI and partial pressure of arterial carbon dioxide was observed only in the SBT-success group (SBT success: Spearman's ρ = 0.728, p = 0.002 vs. SBT failure: ρ = 0.048, p = 0.934). CONCLUSIONS This study demonstrated a reduced differential response in prefrontal cortex %StiO2 in the SBT-failure group compared with the SBT-success group possibly due to the insufficient increase in prefrontal cortex perfusion in SBT-failure patients. A > 1.6% drop in prefrontal cortex %StiO2 during SBT was sensitive in predicting SBT failure. Further research is needed to validate these findings in a larger population and to evaluate whether cerebral cortex %StiO2 measurements by near-infrared spectroscopy can assist in the decision-making process on liberation from MV.
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Affiliation(s)
- Zafeiris Louvaris
- Research Group for Rehabilitation in Internal Disorders, Department of Rehabilitation Sciences, Faculty of Movement and Rehabilitation Sciences, Katholieke University Leuven, Campus Gasthuisberg O&N4, Herestraat 49, Box 1510, B-3000, Leuven, Belgium.
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium.
| | - Marine Van Hollebeke
- Research Group for Rehabilitation in Internal Disorders, Department of Rehabilitation Sciences, Faculty of Movement and Rehabilitation Sciences, Katholieke University Leuven, Campus Gasthuisberg O&N4, Herestraat 49, Box 1510, B-3000, Leuven, Belgium
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Diego Poddighe
- Research Group for Rehabilitation in Internal Disorders, Department of Rehabilitation Sciences, Faculty of Movement and Rehabilitation Sciences, Katholieke University Leuven, Campus Gasthuisberg O&N4, Herestraat 49, Box 1510, B-3000, Leuven, Belgium
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Philippe Meersseman
- Research Group for Rehabilitation in Internal Disorders, Department of Rehabilitation Sciences, Faculty of Movement and Rehabilitation Sciences, Katholieke University Leuven, Campus Gasthuisberg O&N4, Herestraat 49, Box 1510, B-3000, Leuven, Belgium
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Joost Wauters
- Medical Intensive Care Unit, Department of General Internal Medicine, University Hospitals Leuven, Leuven, Belgium
- Laboratory for Clinical Infectious and Inflammatory Disorders, Department of Microbiology and Immunology, University Hospitals Leuven, Leuven, Belgium
| | - Alexander Wilmer
- Medical Intensive Care Unit, Department of General Internal Medicine, University Hospitals Leuven, Leuven, Belgium
- Laboratory for Clinical Infectious and Inflammatory Disorders, Department of Microbiology and Immunology, University Hospitals Leuven, Leuven, Belgium
| | - Rik Gosselink
- Research Group for Rehabilitation in Internal Disorders, Department of Rehabilitation Sciences, Faculty of Movement and Rehabilitation Sciences, Katholieke University Leuven, Campus Gasthuisberg O&N4, Herestraat 49, Box 1510, B-3000, Leuven, Belgium
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Daniel Langer
- Research Group for Rehabilitation in Internal Disorders, Department of Rehabilitation Sciences, Faculty of Movement and Rehabilitation Sciences, Katholieke University Leuven, Campus Gasthuisberg O&N4, Herestraat 49, Box 1510, B-3000, Leuven, Belgium
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Greet Hermans
- Medical Intensive Care Unit, Department of General Internal Medicine, University Hospitals Leuven, Leuven, Belgium
- Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, Katholieke University Leuven, Leuven, Belgium
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Mokhtari M, Amirdosara M, Goharani R, Zangi M, Tafrishinejad A, Nashibi M, Dabbagh A, Sadeghi H, Nateghinia S, Hajiesmaeili M, Yousefi-Banaem H, Sayehmiri F. The Predictive Power of Near-Infrared Spectroscopy in Improving Cognitive Problems in Patients Undergoing Brain Surgeries: A Systematic Review. Anesth Pain Med 2022; 12:e116637. [PMID: 35433374 PMCID: PMC8995777 DOI: 10.5812/aapm.116637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 12/17/2021] [Accepted: 01/07/2022] [Indexed: 12/03/2022] Open
Abstract
One of the main objectives in neurosurgical procedures is the prevention of cerebral ischemia and hypoxia leading to secondary brain injury. Different methods for early detection of intraoperative cerebral ischemia and hypoxia have been used. Near-infrared spectroscopy (NIRS) is a simple, non-invasive method for monitoring cerebral oxygenation increasingly used today. The aim of this study was to systematically review the brain monitoring with NIRS in neurosurgery. The search process resulted in the detection of 324 articles using valid keywords on the electronic databases, including Embase, PubMed, Scopus, Web of Science, and Cochrane Library. Subsequently, the full texts of 34 studies were reviewed, and finally 11 articles (seven prospective studies, three retrospective studies, and one randomized controlled trial) published from 2005 to 2020 were identified as eligible for systematic review. Meta-analysis was not possible due to high heterogeneity in neurological and neurosurgical conditions of patients, expression of different clinical outcomes, and different standard reference tests in the studies reviewed. The results showed that NIRS is a non-invasive cerebral oximetry that provides continuous and measurable cerebral oxygenation information and can be used in a variety of clinical settings.
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Affiliation(s)
- Majid Mokhtari
- Department of Internal Medicine, Pulmonary and Critical Medicine, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahdi Amirdosara
- Anesthesiology Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Goharani
- Department of Anesthesiology, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Masood Zangi
- Anesthesiology Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arash Tafrishinejad
- Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Masoud Nashibi
- Fellowship of Neuroanesthesia, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Dabbagh
- Fellowship in Cardiac Anesthesiology, Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hassan Sadeghi
- Anesthesiology Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeedeh Nateghinia
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Hajiesmaeili
- Critical Care Quality Improvement Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Corresponding Author: Critical Care Quality Improvement Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Hossein Yousefi-Banaem
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Sayehmiri
- Student Research Committee, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Choi H, Park CS, Huh J, Koo J, Jeon J, Kim E, Jung S, Kim HW, Lim JY, Hwang W. Intraoperative Glycemic Variability and Mean Glucose are Predictors for Postoperative Delirium After Cardiac Surgery: A Retrospective Cohort Study. Clin Interv Aging 2022; 17:79-95. [PMID: 35153478 PMCID: PMC8827640 DOI: 10.2147/cia.s338712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 12/20/2021] [Indexed: 12/15/2022] Open
Abstract
Purpose Postoperative delirium (POD) is a common but serious complication after cardiac surgery and is associated with various short- and long-term outcomes. In this study, we investigated the effects of intraoperative glycemic variability (GV) and other glycemic variables on POD after cardiac surgery. Patients and Methods A retrospective single-center cohort analysis was conducted using data from electronic medical record from 2018 to 2020. A total of 705 patients undergoing coronary artery bypass graft surgery and/or valve surgery, and/or aortic replacement surgery were included in the analysis. Intraoperative GV was assessed with a coefficient of variation (CV), which was defined as the standard deviation of five intraoperative blood glucose measurements divided by the mean. POD assessment was performed three times a day in the ICU and twice a day in the ward until discharge by trained medical staff. POD was diagnosed if any of the Confusion Assessment Method for the Intensive Care Unit was positive in the ICU, and the Confusion Assessment Method was positive in the ward. Multivariable logistic regression was used to identify associations between intraoperative GV and POD. Results POD occurred in 306 (43.4%) patients. When intraoperative glycemic CV was compared as a continuous variable, the delirium group had higher intraoperative glycemic CV than the non-delirium group (22.59 [17.09, 29.68] vs 18.19 [13.00, 23.35], p < 0.001), and when intraoperative glycemic CV was classified as quartiles, the incidence of POD increased as intraoperative glycemic CV quartiles increased (first quartile 29.89%; second quartile 36.67%; third quartile 44.63%; and fourth quartile 62.64%, p < 0.001). In the multivariable logistic regression model, patients in the third quartile of intraoperative glycemic CV were 1.833 times (OR 1.833, 95% CI: 1.132–2.967, p = 0.014), and patients in the fourth quartile of intraoperative glycemic CV were 3.645 times (OR 3.645, 95% CI: 2.235–5.944, p < 0.001) more likely to develop POD than those in the first quartile of intraoperative glycemic CV. Conclusion Intraoperative blood glucose fluctuation, manifested by intraoperative GV, is associated with POD after cardiac surgery. Patients with a higher intraoperative GV have an increased risk of POD.
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Affiliation(s)
- Hoon Choi
- Department of Anesthesia and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chul Soo Park
- Department of Anesthesia and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jaewon Huh
- Department of Anesthesia and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jungmin Koo
- Department of Anesthesia and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Joonpyo Jeon
- Department of Anesthesia and Pain Medicine, Eunpyeong St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Eunsung Kim
- Department of Anesthesia and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sangmin Jung
- Department of Anesthesia and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hwan Wook Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ju Yong Lim
- Department of Thoracic and Cardiovascular Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Wonjung Hwang
- Department of Anesthesia and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- Correspondence: Wonjung Hwang, Department of Anesthesia and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea, Tel +82-2-22586162, Fax +82-2-5371951, Email
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Role of Transcranial Doppler in Cardiac Surgery Patients. CURRENT ANESTHESIOLOGY REPORTS 2021. [DOI: 10.1007/s40140-021-00483-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Abstract
Purpose of Review
This review discusses applications of transcranial Doppler (TCD) in cardiac surgery, its efficacy in preventing adverse events such as postoperative cognitive decline and stroke, and its impact on clinical outcomes in these patients.
Recent Findings
TCD alone and in combination with other neuromonitoring modalities has attracted attention as a potential monitoring tool in cardiac surgery patients. TCD allows not only the detection of microemboli and measurement of cerebral blood flow velocity in cerebral arteries but also the assessment of cerebral autoregulation.
Summary
Neuromonitoring is critically important in cardiac surgery as surgical and anesthetic interventions as well as several other factors may increase the risk of cerebral embolization (gaseous and particulate) and cerebral perfusion anomalies, which may lead to adverse neurological events. As an experimental tool, TCD has revealed a possible association of poor neurological outcome with intraoperative cerebral emboli and impaired cerebral perfusion. However, to date, there is no evidence that routine use of transcranial Doppler can improve neurological outcome after cardiac surgery.
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Falasa MP, Arnaoutakis GJ, Janelle GM, Beaver TM. Neuromonitoring and neuroprotection advances for aortic arch surgery. JTCVS Tech 2021; 7:11-19. [PMID: 34318192 PMCID: PMC8312079 DOI: 10.1016/j.xjtc.2020.12.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 12/30/2020] [Indexed: 11/15/2022] Open
Affiliation(s)
- Matt P. Falasa
- Department of Surgery, University of Florida, Gainesville, Fla
| | - George J. Arnaoutakis
- Department of Surgery, University of Florida, Gainesville, Fla
- Division of Cardiovascular Surgery, Department of Surgery, University of Florida, Gainesville, Fla
| | - Greg M. Janelle
- Department of Anesthesiology, University of Florida, Gainesville, Fla
| | - Thomas M. Beaver
- Department of Surgery, University of Florida, Gainesville, Fla
- Division of Cardiovascular Surgery, Department of Surgery, University of Florida, Gainesville, Fla
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Cotae AM, Ţigliş M, Cobilinschi C, Băetu AE, Iacob DM, Grinţescu IM. The Impact of Monitoring Depth of Anesthesia and Nociception on Postoperative Cognitive Function in Adult Multiple Trauma Patients. ACTA ACUST UNITED AC 2021; 57:medicina57050408. [PMID: 33922552 PMCID: PMC8146673 DOI: 10.3390/medicina57050408] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 12/15/2022]
Abstract
Background and Objectives: Patients with traumatic injuries have often been excluded from studies that have attempted to pinpoint modifiable factors to predict the transient disturbance of the cognitive function in the postoperative settings. Anesthetists must be aware of the high risk of developing postoperative delirium and cognitive dysfunction (POCD) in patients undergoing emergency surgery. Monitoring the depth of anesthesia in order to tailor anesthetic delivery may reduce this risk. The primary aim of this study was to improve the prevention strategies for the immediate POCD by assessing anesthetic depth and nociception during emergency surgery. Material and Methods: Of 107 trauma ASA physical status II-IV patients aged over 18 years undergoing emergency noncardiac surgery, 95 patients were included in a prospective randomized study. Exclusion criteria were neurotrauma, chronic use of psychoactive substances or alcohol, impaired preoperative cognitive function, pre-existing psychopathological symptoms, or expected surgery time less than 2 h. Entropy and Surgical Pleth Index (SPI) values were constantly recorded for one group during anesthesia. POCD was assessed 24 h, 48 h, and 72 h after surgery using the Neelon and Champagne (NEECHAM) Confusion Scale. Results: Although in the intervention group, fewer patients experienced POCD episodes in comparison to the control group, the results were not statistically significant (p < 0.08). The study showed a statistically significant inverse correlation between fentanyl and the NEECHAM Confusion Scale at 24 h (r = -0.32, p = 0.0005) and 48 h (r = -0.46, p = 0.0002), sevoflurane and the NEECHAM Confusion Scale at 24 h (r = -0.38, p = 0.0014) and 48 h (r = -0.52, p = 0.0002), and noradrenaline and POCD events in the first 48 h (r = -0.46, p = 0.0013 for the first 24 h, respectively, and r = -0.46, p = 0.0002 for the next 24 h). Conclusions: Entropy and SPI monitoring during anesthesia may play an important role in diminishing the risk of developing immediate POCD after emergency surgery.
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Affiliation(s)
- Ana-Maria Cotae
- Anaesthesia and Intensive Care Clinic, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania; (M.Ţ.); (C.C.); (A.E.B.); (D.M.I.); (I.M.G.)
- Department of Anesthesia and Intensive Care, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
- Correspondence:
| | - Mirela Ţigliş
- Anaesthesia and Intensive Care Clinic, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania; (M.Ţ.); (C.C.); (A.E.B.); (D.M.I.); (I.M.G.)
- Department of Anesthesia and Intensive Care, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
| | - Cristian Cobilinschi
- Anaesthesia and Intensive Care Clinic, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania; (M.Ţ.); (C.C.); (A.E.B.); (D.M.I.); (I.M.G.)
- Department of Anesthesia and Intensive Care, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
| | - Alexandru Emil Băetu
- Anaesthesia and Intensive Care Clinic, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania; (M.Ţ.); (C.C.); (A.E.B.); (D.M.I.); (I.M.G.)
- Department of Anesthesia and Intensive Care, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
| | - Diana Maria Iacob
- Anaesthesia and Intensive Care Clinic, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania; (M.Ţ.); (C.C.); (A.E.B.); (D.M.I.); (I.M.G.)
- Department of Anesthesia and Intensive Care, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
| | - Ioana Marina Grinţescu
- Anaesthesia and Intensive Care Clinic, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania; (M.Ţ.); (C.C.); (A.E.B.); (D.M.I.); (I.M.G.)
- Department of Anesthesia and Intensive Care, Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
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Yoon S, Yoo S, Hur M, Park SK, Lee HC, Jung CW, Bahk JH, Kim JT. The cumulative duration of bispectral index less than 40 concurrent with hypotension is associated with 90-day postoperative mortality: a retrospective study. BMC Anesthesiol 2020; 20:200. [PMID: 32795266 PMCID: PMC7427057 DOI: 10.1186/s12871-020-01122-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 08/09/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The relationship between intraoperative low bispectral index (BIS) values and poor clinical outcomes has been controversial. Intraoperative hypotension is associated with postoperative complication. The purpose of this study was to investigate the influence of intraoperative low BIS values and hypotension on postoperative mortality in patients undergoing major abdominal surgery. METHODS This retrospective study analyzed 1862 cases of general anesthesia. We collected the cumulative time of BIS values below 20 and 40 as well as electroencephalographic suppression and documented the incidences in which these states were maintained for at least 5 min. Durations of intraoperative mean arterial pressures (MAP) less than 50 mmHg were also recorded. Multivariable logistic regression was used to evaluate the association between suspected risk factors and postoperative mortality. RESULTS Ninety-day mortality and 180-day mortality were 1.5 and 3.2% respectively. The cumulative time in minutes for BIS values falling below 40 coupled with MAP falling below 50 mmHg was associated with 90-day mortality (odds ratio, 1.26; 95% confidence interval, 1.04-1.53; P = .019). We found no association between BIS related values and 180-day mortality. CONCLUSIONS The cumulative duration of BIS values less than 40 concurrent with MAP less than 50 mmHg was associated with 90-day postoperative mortality, not 180-day postoperative mortality.
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Affiliation(s)
- Soohyuk Yoon
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Seokha Yoo
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Min Hur
- Department of Anesthesiology and Pain Medicine, Ajou University Hospital, 164 World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, Republic of Korea
| | - Sun-Kyung Park
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Hyung-Chul Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Chul-Woo Jung
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Jae-Hyon Bahk
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Jin-Tae Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.
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Utility of neuromonitoring in hypothermic circulatory arrest cases for early detection of stroke: Listening through the noise. J Thorac Cardiovasc Surg 2020; 162:1035-1045.e5. [PMID: 32204911 DOI: 10.1016/j.jtcvs.2020.01.090] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 12/30/2019] [Accepted: 01/04/2020] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Stroke remains a potentially devastating complication of aortic arch intervention. The value of neurophysiologic intraoperative monitoring (NIOM) in the early identification of stroke is unclear. We evaluated the utility of NIOM for early stroke detection in aortic arch surgery. METHODS Across 8 years at our institution, 365 patients underwent aortic arch surgery with hypothermic circulatory arrest, and 224 cases utilized NIOM. One patient was excluded for intraoperative death. In the remaining cohort, we reviewed the incidence, timing, and location of strokes, and the incidence and nature of NIOM alerts. RESULTS Hemiarch was performed in 154 patients and total arch replacement in 69 patients. Stroke occurred in 6.3% of all cases (14 out of 223), 15.9% of total arches (11 out of 69), and 2.0% of hemiarches (3 out of 154). There were 33 NIOM alerts (14.8%), and 9 patients had both alerts and stroke. Of these, NIOM deficits plausibly correlated with imaging findings in 7 cases (78%). Of the 5 stroke patients without NIOM alerts, 2 developed neurologic symptoms 3 days or more postoperatively, and infarcts in 3 patients did not result in sensory or motor deficits. Excluding 2 patients with late stroke, the sensitivity of NIOM for stroke detection was 75%, specificity was 88.5%, positive predictive value was 27.3%, and negative predictive value was 97.4%. CONCLUSIONS Despite a low positive predictive value requiring a high level of discrimination when interpreting abnormal findings, NIOM has high sensitivity and specificity for the early stroke detection. Furthermore, its high negative predictive valve is reassuring for low risk of stroke in the absence of alerts.
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Veesa JD, Dehghani H. Functional near infrared spectroscopy using spatially resolved data to account for tissue scattering: A numerical study and arm-cuff experiment. JOURNAL OF BIOPHOTONICS 2019; 12:e201900064. [PMID: 31169976 PMCID: PMC7065609 DOI: 10.1002/jbio.201900064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 06/03/2019] [Accepted: 06/04/2019] [Indexed: 05/12/2023]
Abstract
Functional Near-Infrared Spectroscopy (fNIRS) aims to recover changes in tissue optical parameters relating to tissue hemodynamics, to infer functional information in biological tissue. A widely-used application of fNIRS relies on continuous wave (CW) methodology that utilizes multiple distance measurements on human head for study of brain health. The typical method used is spatially resolved spectroscopy (SRS), which is shown to recover tissue oxygenation index (TOI) based on gradient of light intensity measured between two detectors. However, this methodology does not account for tissue scattering which is often assumed. A new parameter recovery algorithm is developed, which directly recovers both the scattering parameter and scaled chromophore concentrations and hence TOI from the measured gradient of light-attenuation at multiple wavelengths. It is shown through simulations that in comparison to conventional SRS which estimates cerebral TOI values with an error of ±12.3%, the proposed method provides more accurate estimate of TOI exhibiting an error of ±5.7% without any prior assumptions of tissue scatter, and can be easily implemented within CW fNIRS systems. Using an arm-cuff experiment, the obtained TOI using the proposed method is shown to provide a higher and more realistic value as compared to utilizing any prior assumptions of tissue scatter.
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Affiliation(s)
- Joshua D. Veesa
- School of Computer ScienceUniversity of BirminghamBirminghamUK
| | - Hamid Dehghani
- School of Computer ScienceUniversity of BirminghamBirminghamUK
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Fleischmann A, Pilge S, Kiel T, Kratzer S, Schneider G, Kreuzer M. Substance-Specific Differences in Human Electroencephalographic Burst Suppression Patterns. Front Hum Neurosci 2018; 12:368. [PMID: 30297992 PMCID: PMC6160564 DOI: 10.3389/fnhum.2018.00368] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 08/28/2018] [Indexed: 12/17/2022] Open
Abstract
Different anesthetic agents induce burst suppression in the electroencephalogram (EEG) at very deep levels of general anesthesia. EEG burst suppression has been identified to be a risk factor for postoperative delirium (POD). EEG based automated detection algorithms are used to detect burst suppression patterns during general anesthesia and a burst suppression ratio (BSR) is calculated. Unfortunately, applied algorithms do not give information as precisely as suggested, often resulting in an underestimation of the patients’ burst suppression level. Additional knowledge of substance-specific burst suppression patterns could be of great importance to improve the ability of EEG based monitors to detect burst suppression. In a re-analysis of EEG recordings obtained from a previous study, we analyzed EEG data of 45 patients undergoing elective surgery under general anesthesia. The patients were anesthetized with sevoflurane, isoflurane or propofol (n = 15, for each group). After skin incision, the used agent was titrated to a level when burst suppression occurred. In a visual analysis of the EEG, blinded to the used anesthetic agent, we included the first distinct burst in our analysis. To avoid bias through changing EEG dynamics throughout the burst, we only focused on the first 2 s of the burst. These episodes were analyzed using the power spectral density (PSD) and normalized PSD, the absolute burst amplitude and absolute burst slope, as well as permutation entropy (PeEn). Our results show significant substance-specific differences in the architecture of the burst. Volatile-induced bursts showed higher burst amplitudes and higher burst power. Propofol-induced bursts had significantly higher relative power in the EEG alpha-range. Further, isoflurane-induced bursts had the steepest burst slopes. We can present the first systematic comparison of substance-specific burst characteristics during anesthesia. Previous observations, mostly derived from animal studies, pointing out the substance-specific differences in bursting behavior, concur with our findings. Our findings of substance-specific EEG characteristics can provide information to help improve automated burst suppression detection in monitoring devices. More specific detection of burst suppression may be helpful to reduce excessive EEG effects of anesthesia and therefore the incidence of adverse outcomes such as POD.
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Affiliation(s)
- Antonia Fleischmann
- Department of Anesthesiology and Intensive Care, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Stefanie Pilge
- Department of Anesthesiology and Intensive Care, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Tobias Kiel
- Department of Anesthesiology and Intensive Care, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Stephan Kratzer
- Department of Anesthesiology and Intensive Care, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Gerhard Schneider
- Department of Anesthesiology and Intensive Care, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Matthias Kreuzer
- Department of Anesthesiology and Intensive Care, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
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Szostakiewicz K, Rybicki Z, Tomaszewski D. Non-instrumental clinical monitoring does not guarantee an adequate course of general anesthesia. A prospective clinical study. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2018; 162:198-205. [PMID: 29568123 DOI: 10.5507/bp.2018.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 03/02/2018] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Clinical monitoring is the most common method of adjusting the appropriate level of general anesthesia. However, episodes of intraoperative awareness (AWR) are still reported, suggesting that clinical observations may not be sufficient in some cases. The objective of this study was to compare the efficacy of clinical and instrumental neuromonitoring with auditory evoked potentials (AEP) in an intraoperative analysis of the proper level of general anesthesia. METHODS Patients scheduled for elective surgery were randomly divided into two groups. Subjects in the first group underwent intravenous, in the second group volatile anesthesia. The adequacy of anesthesia was analyzed using clinical parameters. All the participants were instrumentally monitored with the autoregressive AEP index (AAI). After the anesthesia, patients filled out a questionnaire on possible AWR. RESULTS Data of 208 patients (87 in the first, and 121 in the second group) were analyzed. Before surgery there were no changes in AAI values between groups (80 vs. 78, P=0.5192). The mean values of clinical parameters changed, but five minutes after the nociceptive stimuli. The mean values of AAI at analyzed time points were specific for general anesthesia. In patients under intravenous anesthesia, we found more episodes of too low (46/608 vs.15/847, P<0.000) anesthesia. One case of AWR was found in the TIVA group. CONCLUSIONS AAI index is good indicator of patients' level of consciousness during general anesthesia. Standard clinical monitoring provides appropriate level of the procedure. However, it is insufficient during TIVA and does not prevent episodes of AWR.
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Affiliation(s)
- Katarzyna Szostakiewicz
- Department of Anesthesiology and Intensive Therapy, Military Institute of Medicine, 128 Szaserow Str., 04141 Warsaw, Poland
| | - Zbigniew Rybicki
- Department of Anesthesiology and Intensive Therapy, Military Institute of Medicine, 128 Szaserow Str., 04141 Warsaw, Poland
| | - Dariusz Tomaszewski
- Department of Anesthesiology and Intensive Therapy, Military Institute of Medicine, 128 Szaserow Str., 04141 Warsaw, Poland
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Şahan C, Sungur Z, Çamcı E, Sivrikoz N, Sayin Ö, Gurvit H, Şentürk M. Effects of cerebral oxygen changes during coronary bypass surgery on postoperative cognitive dysfunction in elderly patients: a pilot study. BRAZILIAN JOURNAL OF ANESTHESIOLOGY (ENGLISH EDITION) 2018. [PMID: 29287674 PMCID: PMC9391798 DOI: 10.1016/j.bjane.2017.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and objectives Postoperative cognitive dysfunction is common after cardiac surgery. Adequate cerebral perfusion is essential and near infrared spectroscopy (NIRS) can measure cerebral oxygenation. Aim of this study is to compare incidence of early and late postoperative cognitive dysfunction in elderly patients treated with conventional or near infrared spectroscopy monitoring. Methods Patients undergoing coronary surgery above 60 years, were included and randomized to 2 groups; control and NIRS groups. Peroperative management was NIRS guided in GN; and with conventional approach in control group. Test battery was performed before surgery, at first week and 3rd month postoperatively. The battery comprised clock drawing, memory, word list generation, digit spam and visuospatial skills subtests. Postoperative cognitive dysfunction was defined as drop of 1 SD (standard deviation) from baseline on two or more tests. Mann-Whitney U test was used for comparison of quantitative measurements; Chi-square exact test to compare quantitative data. Results Twenty-one patients in control group and 19 in NIRS group completed study. Demographic and operative data were similar. At first week postoperative cognitive dysfunction were present in 9 (45%) and 7 (41%) of patients in control group and NIRS group respectively. At third month 10 patients (50%) were assessed as postoperative cognitive dysfunction; incidence was 4 (24%) in NIRS group (p:0.055). Early and late postoperative cognitive dysfunction group had significantly longer ICU stay (1.74 + 0.56 vs. 2.94 + 0.95; p < 0.001; 1.91 + 0.7 vs. 2.79 + 1.05; p < 0.01) and longer hospital stay (9.19 + 2.8 vs. 11.88 + 1.7; p < 0.01; 9.48 + 2.6 vs. 11.36 + 2.4; p < 0.05). Conclusion In this pilot study conventional monitoring and near infrared spectroscopy resulted in similar rates of early postoperative cognitive dysfunction. Late cognitive dysfunction tended to ameliorate with near infrared spectroscopy. Early and late cognitive declines were associated with prolonged ICU and hospital stays.
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15
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[Effects of cerebral oxygen changes during coronary bypass surgery on postoperative cognitive dysfunction in elderly patients: a pilot study]. Rev Bras Anestesiol 2017; 68:142-148. [PMID: 29287674 DOI: 10.1016/j.bjan.2017.10.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 10/05/2017] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Postoperative cognitive dysfunction is common after cardiac surgery. Adequate cerebral perfusion is essential and near infrared spectroscopy (NIRS) can measure cerebral oxygenation. Aim of this study is to compare incidence of early and late postoperative cognitive dysfunction in elderly patients treated with conventional or near infrared spectroscopy monitoring. METHODS Patients undergoing coronary surgery above 60 years, were included and randomized to 2 groups; control and NIRS groups. Peroperative management was NIRS guided in GN; and with conventional approach in control group. Test battery was performed before surgery, at first week and 3 rd month postoperatively. The battery comprised clock drawing, memory, word list generation, digit spam and visuospatial skills subtests. Postoperative cognitive dysfunction was defined as drop of 1 SD (standard deviation) from baseline on two or more tests. Mann-Whitney U test was used for comparison of quantitative measurements; Chi-square exact test to compare quantitative data. RESULTS Twenty-one patients in control group and 19 in NIRS group completed study. Demographic and operative data were similar. At first week postoperative cognitive dysfunction were present in 9 (45%) and 7 (41%) of patients in control group and NIRS group respectively. At third month 10 patients (50%) were assessed as postoperative cognitive dysfunction; incidence was 4 (24%) in NIRS group (p:0.055). Early and late postoperative cognitive dysfunction group had significantly longer ICU stay (1.74+0.56 vs. 2.94+0.95; p<0.001; 1.91+0.7 vs. 2.79+1.05; p<0.01) and longer hospital stay (9.19+2.8 vs. 11.88+1.7; p<0.01; 9.48+2.6 vs. 11.36+2.4; p<0.05). CONCLUSION In this pilot study conventional monitoring and near infrared spectroscopy resulted in similar rates of early postoperative cognitive dysfunction. Late cognitive dysfunction tended to ameliorate with near infrared spectroscopy. Early and late cognitive declines were associated with prolonged ICU and hospital stays.
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16
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Matcan S, Sanabria Carretero P, Gómez Rojo M, Castro Parga L, Reinoso-Barbero F. The importance of bilateral monitoring of cerebral oxygenation (NIRS): Clinical case of asymmetry during cardiopulmonary bypass secondary to previous cerebral infarction. ACTA ACUST UNITED AC 2017; 65:165-169. [PMID: 28958609 DOI: 10.1016/j.redar.2017.06.008] [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: 08/31/2016] [Revised: 06/14/2017] [Accepted: 06/22/2017] [Indexed: 11/17/2022]
Abstract
Cerebral oximetry based on near infrared spectroscopy (NIRS) technology is used to determine cerebral tissue oxygenation. We hereby present the clinical case of a 12-month old child with right hemiparesis secondary to prior left middle cerebral artery stroke 8 months ago. The child underwent surgical enlargement of the right ventricular outflow tract (RVOT) with cardiopulmonary bypass. During cardiopulmonary bypass, asymmetric NIRS results were detected between both hemispheres. The utilization of multimodal neuromonitoring (NIRS-BIS) allowed acting on both perfusion pressure and anesthetic depth to balance out the supply and demand of cerebral oxygen consumption. No new neurological sequelae were observed postoperatively. We consider bilateral NIRS monitoring necessary in order to detect asymmetries between cerebral hemispheres. Although asymmetries were not present at baseline, they can arise intraoperatively and its monitoring thus allows the detection and treatment of cerebral ischemia-hypoxia in the healthy hemisphere, which if undetected and untreated would lead to additional neurological damage.
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Affiliation(s)
- S Matcan
- Departamento de Anestesiología, Reanimación y Cuidados Críticos, Hospital Universitario Infantil La Paz, Madrid, España.
| | - P Sanabria Carretero
- Departamento de Anestesiología, Reanimación y Cuidados Críticos, Hospital Universitario Infantil La Paz, Madrid, España
| | - M Gómez Rojo
- Departamento de Anestesiología, Reanimación y Cuidados Críticos, Hospital Universitario Infantil La Paz, Madrid, España
| | - L Castro Parga
- Departamento de Anestesiología, Reanimación y Cuidados Críticos, Hospital Universitario Infantil La Paz, Madrid, España
| | - F Reinoso-Barbero
- Departamento de Anestesiología, Reanimación y Cuidados Críticos, Hospital Universitario Infantil La Paz, Madrid, España
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Guarracino F, Baldassarri R, Zanatta P. Current Status of Neuromonitoring in Cardiac Surgery. CURRENT ANESTHESIOLOGY REPORTS 2017. [DOI: 10.1007/s40140-017-0229-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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A Protocol for Diagnosis and Management of Aortic Atherosclerosis in Cardiac Surgery Patients. Int J Vasc Med 2017; 2017:1874395. [PMID: 28852575 PMCID: PMC5568616 DOI: 10.1155/2017/1874395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 07/02/2017] [Indexed: 11/17/2022] Open
Abstract
In patients undergoing cardiac surgery, use of perioperative screening for aortic atherosclerosis with modified TEE (A-View method) was associated with lower postoperative mortality, but not stroke, as compared to patients operated on without such screening. At the time of clinical implementation and validation, we did not yet standardize the indications for modified TEE and the changes in patient management in the presence of aortic atherosclerosis. Therefore, we designed a protocol, which combined the diagnosis of atherosclerosis of thoracic aorta and the subsequent considerations with respect to the intraoperative management and provides a systematic approach to reduce the risk of cerebral complications.
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Thorn C, Knight B, Pastel E, McCulloch L, Patel B, Shore A, Kos K. Adipose tissue is influenced by hypoxia of obstructive sleep apnea syndrome independent of obesity. DIABETES & METABOLISM 2017; 43:240-247. [DOI: 10.1016/j.diabet.2016.12.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/07/2016] [Accepted: 12/01/2016] [Indexed: 12/15/2022]
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Green DW, Kunst G. Cerebral oximetry and its role in adult cardiac, non-cardiac surgery and resuscitation from cardiac arrest. Anaesthesia 2017; 72 Suppl 1:48-57. [DOI: 10.1111/anae.13740] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/01/2016] [Indexed: 02/03/2023]
Affiliation(s)
- D. W. Green
- Department of Anaesthesia, Intensive Care and Pain Medicine; King's College Hospital NHS Foundation Trust; London UK
| | - G. Kunst
- Department of Anaesthesia, Intensive Care and Pain Medicine; King's College Hospital NHS Foundation Trust; London UK
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Phan P, Highton D, Lai J, Smith M, Elwell C, Tachtsidis I. Multi-channel multi-distance broadband near-infrared spectroscopy system to measure the spatial response of cellular oxygen metabolism and tissue oxygenation. BIOMEDICAL OPTICS EXPRESS 2016; 7:4424-4440. [PMID: 27895985 PMCID: PMC5119585 DOI: 10.1364/boe.7.004424] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/22/2016] [Accepted: 09/26/2016] [Indexed: 05/22/2023]
Abstract
We present a multi-channel, multi-distance broadband near-infrared spectroscopy (NIRS) system with the capability of measuring changes in haemoglobin concentrations (Δ[HbO2], Δ[HHb]), oxidation state of cytochrome-c-oxidase (Δ[oxCCO]) and tissue oxygen saturation (TOI) in the adult human brain. The main components of the instrument are two customized spectrographs and two light sources. Each spectrograph is lens-based to improve light throughput, has a grating enhanced to optimise reflection in the near-infrared (NIR) spectral region and uses a front illuminated cooled CCD camera (-70° C) with a square chip dimension of 12.3 x 12.3 mm (512 x 512 pixels). Each light source uses a 50W halogen bulb with a gold plated mirror to increase the intensity of the NIR light. Each light source was connected to a custom-built bifurcated fibre bundle to create two source fibre bundles (3.2 mm diameter each). Each spectrograph received light input from another custom-built fibre bundle comprised of six individual bundles (one with 0.6 mm diameter and the other five with 1.5 mm diameter). All fibre bundles were fixed on a 3D printed optode holder (two light sources x two fibre bundles each = four probes; and two spectrographs x six fibre bundles each = 12 probes) that allowed 24 multi-distance channels across the forehead (six channels at 20 mm, three channels at 30 mm and 15 channels at 35 mm) and six TOI measurements. We demonstrated the use of the system in a cohort of nine healthy adult volunteers during prefrontal cortex functional activation using the Stroop task. We have observed functional responses identified as significant increase in Δ[HbO2], decrease in Δ[HHb] and increase in Δ[oxCCO] in five channels (out of 12), that overlay the left and right dorsolateral prefrontal cortices. There was no observable TOI functional response and we have shown small variations in TOI across different sites within the same subject and within the same site across subjects.
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Affiliation(s)
- Phong Phan
- Department of Medical Physics and Biomedical Engineering, UCL, London WC1E 6BT, UK
| | - David Highton
- Neurocritical Care Unit, The National Hospital for Neurology and Neurosurgery, University College London Hospitals, Queen Square, London WC1N 3BG, UK
| | - Jonathan Lai
- Department of Medical Physics and Biomedical Engineering, UCL, London WC1E 6BT, UK
| | - Martin Smith
- Department of Medical Physics and Biomedical Engineering, UCL, London WC1E 6BT, UK
- Neurocritical Care Unit, The National Hospital for Neurology and Neurosurgery, University College London Hospitals, Queen Square, London WC1N 3BG, UK
| | - Clare Elwell
- Department of Medical Physics and Biomedical Engineering, UCL, London WC1E 6BT, UK
| | - Ilias Tachtsidis
- Department of Medical Physics and Biomedical Engineering, UCL, London WC1E 6BT, UK
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Lindsay H, Srinivas C, Djaiani G. Neuroprotection during aortic surgery. Best Pract Res Clin Anaesthesiol 2016; 30:283-303. [DOI: 10.1016/j.bpa.2016.05.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 04/21/2016] [Accepted: 05/09/2016] [Indexed: 01/16/2023]
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Sen AN, Gopinath SP, Robertson CS. Clinical application of near-infrared spectroscopy in patients with traumatic brain injury: a review of the progress of the field. NEUROPHOTONICS 2016; 3:031409. [PMID: 27226973 PMCID: PMC4874161 DOI: 10.1117/1.nph.3.3.031409] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 03/31/2016] [Indexed: 05/24/2023]
Abstract
Near-infrared spectroscopy (NIRS) is a technique by which the interaction between light in the near-infrared spectrum and matter can be quantitatively measured to provide information about the particular chromophore. Study into the clinical application of NIRS for traumatic brain injury (TBI) began in the 1990s with early reports of the ability to detect intracranial hematomas using NIRS. We highlight the advances in clinical applications of NIRS over the past two decades as they relate to TBI. We discuss recent studies evaluating NIRS techniques for intracranial hematoma detection, followed by the clinical application of NIRS in intracranial pressure and brain oxygenation measurement, and conclude with a summary of potential future uses of NIRS in TBI patient management.
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Affiliation(s)
- Anish N. Sen
- Baylor College of Medicine, Department of Neurosurgery, 7200 Cambridge Street, Suite 9A, Houston, Texas 77030, United States
| | - Shankar P. Gopinath
- Baylor College of Medicine, Department of Neurosurgery, 7200 Cambridge Street, Suite 9A, Houston, Texas 77030, United States
| | - Claudia S. Robertson
- Baylor College of Medicine, Department of Neurosurgery, 7200 Cambridge Street, Suite 9A, Houston, Texas 77030, United States
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Davies DJ, Su Z, Clancy MT, Lucas SJE, Dehghani H, Logan A, Belli A. Near-Infrared Spectroscopy in the Monitoring of Adult Traumatic Brain Injury: A Review. J Neurotrauma 2015; 32:933-41. [PMID: 25603012 DOI: 10.1089/neu.2014.3748] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Cerebral near-infrared spectroscopy (NIRS) has long represented an exciting prospect for the noninvasive monitoring of cerebral tissue oxygenation and perfusion in the context of traumatic brain injury (TBI), although uncertainty still exists regarding the reliability of this technology specifically within this field. We have undertaken a review of the existing literature relating to the application of NIRS within TBI. We discuss current "state-of-the-art" NIRS monitoring, provide a brief background of the technology, and discuss the evidence regarding the ability of NIRS to substitute for established invasive monitoring in TBI.
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Affiliation(s)
- David J Davies
- 1 Department of Neurosurgery Clinical Research, Queen Elizabeth Hospital , Edgbaston, Birmingham, United Kingdom
| | - Zhangjie Su
- 1 Department of Neurosurgery Clinical Research, Queen Elizabeth Hospital , Edgbaston, Birmingham, United Kingdom
| | - Michael T Clancy
- 2 School of Computational Science Medical Imaging Group, University of Birmingham , Edgbaston, Birmingham, United Kingdom
| | - Samuel J E Lucas
- 3 Department of Exercise Physiology, School of Sport, Exercise, and Rehabilitation Sciences, University of Birmingham , Edgbaston, Birmingham, United Kingdom
| | - Hamid Dehghani
- 4 Department of Medical Imaging, School of Computer Science, University of Birmingham , Edgbaston, Birmingham, United Kingdom
| | - Ann Logan
- 5 Department of Molecular Neuroscience, School of Clinical and Experimental Medicine, University of Birmingham , Edgbaston, Birmingham, United Kingdom
| | - Antonio Belli
- 6 Department of Surgical Neurology, National Institute for Health Research, Queen Elizabeth Hospital , Edgbaston, Birmingham, United Kingdom
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KAWAGUCHI M, YOSHITANI K, ISHIDA K, YOKOTA M, UEZONO S, NOMURA M. Survey on Perioperative Use of Cerebral Near-infrared Spectroscopy Monitoring in Japan. ACTA ACUST UNITED AC 2015. [DOI: 10.2199/jjsca.35.651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
| | - Kenji YOSHITANI
- Department of Anesthesiology, National Cerebral and Cardiovascular Center
| | - Kazuyoshi ISHIDA
- Department of Anesthesiology, Yamaguchi University Graduate School of Medicine
| | - Miyuki YOKOTA
- Department of Anesthesiology, Cancer Institute Hopspital
| | - Shoichi UEZONO
- Department of Anesthesiology, Jikei University School of Medicine
| | - Minoru NOMURA
- Department of Anesthesiology, Tokyo Women's Medical University
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Sørensen H, Rasmussen P, Sato K, Persson S, Olesen N, Nielsen H, Olsen N, Ogoh S, Secher N. External carotid artery flow maintains near infrared spectroscopy-determined frontal lobe oxygenation during ephedrine administration. Br J Anaesth 2014; 113:452-8. [DOI: 10.1093/bja/aet481] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Murfin D. Phenylephrine: in or out? SOUTHERN AFRICAN JOURNAL OF ANAESTHESIA AND ANALGESIA 2014. [DOI: 10.1080/22201173.2011.10872778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Vretzakis G, Georgopoulou S, Stamoulis K, Stamatiou G, Tsakiridis K, Zarogoulidis P, Katsikogianis N, Kougioumtzi I, Machairiotis N, Tsiouda T, Mpakas A, Beleveslis T, Koletas A, Siminelakis SN, Zarogoulidis K. Cerebral oximetry in cardiac anesthesia. J Thorac Dis 2014; 6 Suppl 1:S60-9. [PMID: 24672700 DOI: 10.3978/j.issn.2072-1439.2013.10.22] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Accepted: 10/29/2013] [Indexed: 01/27/2023]
Abstract
Cerebral oximetry based on near-infrared spectroscopy (NIRS) is increasingly used during the perioperative period of cardiovascular operations. It is a noninvasive technology that can monitor the regional oxygen saturation of the frontal cortex. Current literature indicates that it can stratify patients preoperatively according their risk. Intraoperatively, it provides continuous information about brain oxygenation and allows the use of brain as sentinel organ indexing overall organ perfusion and injury. This review focuses on the clinical validity and applicability of this monitor for cardiac surgical patients.
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Affiliation(s)
- George Vretzakis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Stauroula Georgopoulou
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Konstantinos Stamoulis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Georgia Stamatiou
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Kosmas Tsakiridis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Paul Zarogoulidis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Nikolaos Katsikogianis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Ioanna Kougioumtzi
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Nikolaos Machairiotis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Theodora Tsiouda
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Andreas Mpakas
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Thomas Beleveslis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Alexander Koletas
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Stavros N Siminelakis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
| | - Konstantinos Zarogoulidis
- 1 Anesthesiology Clinic, University Hospital of Larissa, Greece ; 2 Anesthesiology Department, University Hospital of Larisa, Greece ; 3 Cardiothoracic Surgery Department, "Saint Luke" Private Hospital, Thessaloniki, Panorama, Greece ; 4 Pulmonary Department-Oncology Unit, "G. Papanikolaou" General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece ; 5 Surgery Department (NHS), University General Hospital of Alexandroupolis, Alexandroupolis, Greece ; 6 Internal Medicine Department, "Theageneio" Anticancer Hospital, Thessaloniki, Greece ; 7 Cardiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 8 Anesthesiology Department, "Saint Luke" Private Hospital, Thessaloniki, Greece ; 9 Cardiothoracic Surgery Department, University Hospital of Ioannina, Ioannina, Greece
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Zacharias DG, Lilly K, Shaw CL, Pirundini P, Rizzo RJ, Body SC, Longford NT. Survey of the clinical assessment and utility of near-infrared cerebral oximetry in cardiac surgery. J Cardiothorac Vasc Anesth 2013; 28:308-16. [PMID: 24140084 DOI: 10.1053/j.jvca.2013.06.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Near-infrared cerebral oximetry increasingly is used for monitoring during cardiac surgery. Nonetheless, the scientific basis for incorporating this technology into clinical practice, the indications for when to do so, and standard diagnostic and treatment algorithms for defining abnormal values are yet to be rigorously defined. The authors hypothesized that there would be (1) variation in clinical use and practices for near-infrared spectroscopy (NIRS), and (2) variation in management of patients when clinicians are provided with NIRS information. In order to test this hypothesis, they sought to assess the nature and strength of response heterogeneity among anesthesiologists and cardiac perfusionists when provided with cardiac surgery patient scenarios and cerebral oximetry data. DESIGN A prospectively collected survey. SETTING A hospital-based, multi-institutional, multinational study. PARTICIPANTS By e-mail, the authors surveyed the membership of the Society of Cardiovascular Anesthesiologists and the online Cardiovascular Perfusion Forum. INTERVENTIONS This survey was focused on ascertaining what actions clinicians would take in each scenario, given case information and cerebral oximetry tracings. Questions were based on 11 patient scenarios selected to represent small, large, symmetric, or asymmetric decreases in measured regional cerebral oxygen saturation (rScO2) encountered during cardiac surgery. Information on the respondents' (n = 796; 73% anesthesiologists) clinical practice, demography, and cerebral oximetry utilization was collected. An index of dispersion was used to assess response heterogeneity overall and within demographic subgroups. MEASUREMENTS AND MAIN RESULTS The majority of respondents indicated that cerebral oximetry monitoring was either useful or an essential monitor, especially perfusionists and clinicians who used cerebral oximetry most frequently. There were marked differences in responses between perfusionists and anesthesiologists for 4 of the 6 scenarios (p<0.005 for each of these 4 scenarios) occurring during cardiopulmonary bypass. Scenarios having greatest rScO2 reduction or asymmetry in rScO2 were associated with the highest dispersion, indicating least agreement in management. Scenarios with mild or moderate rScO2 reduction were associated with the lowest dispersion, indicating greater agreement in management. CONCLUSIONS Although experimental data gradually are accumulating to support the role for cerebral oximetry monitoring during cardiac surgery, the results of the present survey support the view that its role remains poorly defined, and consensus for its appropriate use is lacking. Importantly, the authors observed marked variation in the use, perceived utility, and management of patients for 4 of the 6 CPB scenarios between perfusionists and anesthesiologists who share the management of CPB. These findings support the need for well-designed, adequately-powered clinical trials examining the value of this technology.
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Affiliation(s)
- David G Zacharias
- Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN
| | | | | | | | | | - Simon C Body
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
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Radtke F, Franck M, Lendner J, Krüger S, Wernecke K, Spies C. Monitoring depth of anaesthesia in a randomized trial decreases the rate of postoperative delirium but not postoperative cognitive dysfunction. Br J Anaesth 2013; 110 Suppl 1:i98-105. [DOI: 10.1093/bja/aet055] [Citation(s) in RCA: 349] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Mutch WAC, Patel SR, Shahidi AM, Kulasekara SI, Fisher JA, Duffin J, Hudson C. Cerebral oxygen saturation: graded response to carbon dioxide with isoxia and graded response to oxygen with isocapnia. PLoS One 2013; 8:e57881. [PMID: 23469096 PMCID: PMC3585256 DOI: 10.1371/journal.pone.0057881] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 01/27/2013] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Monitoring cerebral saturation is increasingly seen as an aid to management of patients in the operating room and in neurocritical care. How best to manipulate cerebral saturation is not fully known. We examined cerebral saturation with graded changes in carbon dioxide tension while isoxic and with graded changes in oxygen tension while isocapnic. METHODOLOGY/PRINCIPAL FINDINGS The study was approved by the Research Ethics Board of the University Health Network at the University of Toronto. Thirteen studies were undertaken in healthy adults with cerebral oximetry by near infrared spectroscopy. End-tidal gas concentrations were manipulated using a model-based prospective end-tidal targeting device. End-tidal carbon dioxide was altered ±15 mmHg from baseline in 5 mmHg increments with isoxia (clamped at 110±4 mmHg). End-tidal oxygen was changed to 300, 400, 500, 80, 60 and 50 mmHg under isocapnia (37±2 mmHg). Twelve studies were completed. The end-tidal carbon dioxide versus cerebral saturation fit a linear relationship (R(2) = 0.92±0.06). The end-tidal oxygen versus cerebral saturation followed log-linear behaviour and best fit a hyperbolic relationship (R(2) = 0.85±0.10). Cerebral saturation was maximized in isoxia at end-tidal carbon dioxide of baseline +15 mmHg (77±3 percent). Cerebral saturation was minimal in isocapnia at an end-tidal oxygen tension of 50 mmHg (61±3 percent). The cerebral saturation during normoxic hypocapnia was equivalent to normocapnic hypoxia of 60 mmHg. CONCLUSIONS/SIGNIFICANCE Hypocapnia reduces cerebral saturation to an extent equivalent to moderate hypoxia.
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Affiliation(s)
- W Alan C Mutch
- Department of Anesthesia and Perioperative Medicine, University of Manitoba, Winnipeg, Manitoba, Canada.
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Ghosh A, Elwell C, Smith M. Review article: cerebral near-infrared spectroscopy in adults: a work in progress. Anesth Analg 2012; 115:1373-83. [PMID: 23144435 DOI: 10.1213/ane.0b013e31826dd6a6] [Citation(s) in RCA: 182] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Near-infrared spectroscopy (NIRS) has potential as a noninvasive brain monitor across a spectrum of disorders. In the last decade, there has been a rapid expansion of clinical experience using NIRS to monitor cerebral oxygenation, and there is some evidence that NIRS-guided brain protection protocols might lead to a reduction in perioperative neurologic complications after cardiac surgery. However, there are no data to support the wider application of NIRS during routine surgery under general anesthesia, and its application in brain injury, where it might be expected to have a key monitoring role, is undefined. Although increasingly sophisticated apparatuses, including broadband and time-resolved spectroscopy systems, provide insights into the potential of NIRS to measure regional cerebral oxygenation, hemodynamics, and metabolism in real-time, these innovations have yet to translate into effective monitor-guided brain protection treatment strategies. NIRS has many potential advantages over other neuromonitoring techniques, but further investigation and technological advances are necessary before it can be introduced more widely into clinical practice.
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Affiliation(s)
- Arnab Ghosh
- Department of Neurocritical Care, Box 30, The National Hospital for Neurology and Neurosurgery, University College London Hospitals, Queen Square, London WC1N 3BGUK
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Grocott HP, Andreiw A. Con: topical head cooling should not be used during deep hypothermic circulatory arrest. J Cardiothorac Vasc Anesth 2012; 26:337-9. [PMID: 22244769 DOI: 10.1053/j.jvca.2011.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Hilary P Grocott
- Department of Anesthesia & Perioperative Medicine, University of Manitoba, Winnipeg, Manitoba, Canada.
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Boas DA, Franceschini MA. Haemoglobin oxygen saturation as a biomarker: the problem and a solution. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2011; 369:4407-24. [PMID: 22006898 PMCID: PMC3263786 DOI: 10.1098/rsta.2011.0250] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Near-infrared spectroscopy measures of haemoglobin oxygen saturation are often used as an indicator of sufficient oxygen delivery to assess injury susceptibility and tissue damage. They have also often been used as a surrogate measure of oxygen metabolism. Unfortunately, these measures have generally failed to provide robust indicators of injury and metabolism. In this paper, we first review when haemoglobin oxygen saturation does work as a robust indicator, and then detail when and why it fails for assessing brain injury and breast cancer. Finally, we discuss the solution to obtain more robust measures of tissue injury and cancer by combining oxygen saturation measurements with measures of blood flow and volume to more accurately estimate oxygen metabolism.
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Affiliation(s)
- David A Boas
- Optics Division of the Martinos Center for Biomedical Imaging, Harvard Medical School, Massachusetts General Hospital, 149 13th St rm 2301, Charlestown, MA 02129, USA.
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Smith M. Shedding light on the adult brain: a review of the clinical applications of near-infrared spectroscopy. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2011; 369:4452-69. [PMID: 22006901 DOI: 10.1098/rsta.2011.0242] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Near-infrared spectroscopy (NIRS) has potential as a non-invasive brain monitor in a wide range of clinical scenarios. In the last decade, there has been a rapid expansion of clinical experience using NIRS to monitor cerebral oxygenation, particularly in cardiac surgery, where there is some evidence that NIRS-guided brain protection protocols might lead to a reduction in peri-operative neurological complications. There are no data to support the wider application of NIRS to monitor cerebral oxygenation during routine anaesthesia and surgery, and its application in brain injury, where it might be expected to have a key monitoring role, is as yet undefined. Technological developments, including the introduction of broadband and time-resolved spectrometers that are capable of reliably measuring changes in oxidized cytochrome c oxidase, offer real potential for a single NIRS-based device to provide multi-site, regional monitoring of cerebral metabolic status as well as oxygenation and haemodynamics.
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Affiliation(s)
- Martin Smith
- Department of Neurocritical Care, The National Hospital for Neurology and Neurosurgery, University College London Hospitals, Queen Square, London WC1N 3BG, UK.
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Schoen J, Meyerrose J, Paarmann H, Heringlake M, Hueppe M, Berger KU. Preoperative regional cerebral oxygen saturation is a predictor of postoperative delirium in on-pump cardiac surgery patients: a prospective observational trial. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2011; 15:R218. [PMID: 21929765 PMCID: PMC3334763 DOI: 10.1186/cc10454] [Citation(s) in RCA: 149] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 07/22/2011] [Accepted: 09/19/2011] [Indexed: 12/11/2022]
Abstract
Introduction Postoperative delirium is an important problem in patients undergoing major surgery. Cerebral oximetry is a non-invasive method to detect imbalances in the cerebral oxygen supply/demand-ratio. Low preoperative cerebral oxygen saturation (ScO2) levels have been associated with postoperative delirium in non-cardiac surgery patients. The present prospective observational study determines the relationship between pre- and intra-operative ScO2 levels and postoperative delirium in patients undergoing on-pump cardiac surgery. Methods After approval of the local ethical committee and written informed consent, N = 231 patients scheduled for elective/urgent cardiac surgery were enrolled. Delirium was assessed by the confusion-assessment-method for the intensive care unit (CAM-ICU) on the first three days after surgery. ScO2 was obtained on the day before surgery, immediately before surgery and throughout the surgical procedure. Preoperative cognitive function, demographic, surgery related, and intra- and post-operative physiological data were registered. Results Patients with delirium had lower pre- and intra-operative ScO2 readings, were older, had lower mini-mental-status-examination(MMSE) scores, higher additive EuroScore and lower preoperative haemoglobin-levels. The binary logistic regression identified older age, lower MMSE, neurological or psychiatric disease and lower preoperative ScO2 as independent predictors of postoperative delirium. Conclusions The presented study shows that a low preoperative ScO2 is associated with postoperative delirium after on-pump cardiac surgery.
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Affiliation(s)
- Julika Schoen
- Department of Anaesthesiology, University of Luebeck, Ratzeburger Allee 160, Luebeck, 23538, Germany
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Mayr NP, Martin K, Kurz J, Tassani P. Monitoring of cerebral oxygen saturation during closed-chest and open-chest CPR. Resuscitation 2011; 82:635-6. [DOI: 10.1016/j.resuscitation.2011.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Accepted: 01/20/2011] [Indexed: 10/18/2022]
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Bibliography. Current world literature. Thoracic anesthesia. Curr Opin Anaesthesiol 2011; 24:111-3. [PMID: 21321525 DOI: 10.1097/aco.0b013e3283433a20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Roggenbach J, Rauch H. [Type A dissection. Principles of anesthesiological management]. Anaesthesist 2010; 60:139-51. [PMID: 21184042 DOI: 10.1007/s00101-010-1809-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Acute type A dissection is among the most dangerous of vascular diseases and is associated with a high lethality. Surgery for type A dissection is a complex procedure which is accompanied by relevant blood losses and severe deterioration of the coagulation system. Either due to the dissection or the surgical procedure, perfusion of affected organs can be diminished or completely disrupted with the risk of irreversible organ damage especially in the brain. Perioperative anesthesiological management for type A dissection is demanding and involves maintaining hemodynamic stability, surveillance of cerebral oxygenation and transesophageal echocardiographical diagnostic support for the decision-making of the most appropriate surgical approach. Furthermore, reestablishment of sufficient hemostasis can be challenging and requires thorough understanding of the relevant aspects affecting normal hemostasis during surgical repair of aortic dissection. In this article relevant pathophysiological aspects and basic principles of anesthesiological management of type A dissection are described.
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Affiliation(s)
- J Roggenbach
- Klinik für Anaesthesiolgie und Intensivmedizin, Universität Heidelberg, Im Neuenheimer Feld 110, Heidelberg, Germany.
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Faulkner JT, Hartley M, Tang A. Using cerebral oximetry to prevent adverse outcomes during cardiac surgery. Perfusion 2010; 26:79-81. [DOI: 10.1177/0267659110393298] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We report a case of reduced cerebral oxygenation which had the possibility of leading to an adverse outcome if it had not been detected by the routine use of cerebral oximetry. This case study illustrates that an inadvertent re-adjustment of a single-stage venous cannula within the superior vena cava resulted only in the cerebral oximetry device alerting to a potential problem. All other monitoring devices remained within standard operating parameters, with no deviation throughout the duration of the incident.
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Affiliation(s)
- JT Faulkner
- Department of Clinical Perfusion, Lancashire Cardiac Centre, Blackpool, UK,
| | - M. Hartley
- Department of Cardiothoracic Anaesthesia, Lancashire Cardiac Centre, Blackpool, UK
| | - A. Tang
- Department of Cardiothoracic Surgery, Lancashire Cardiac Centre, Blackpool, UK
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Current world literature. Neuroanaesthesia. Pain medicine. Regional anaesthesia. Curr Opin Anaesthesiol 2010; 23:671-8. [PMID: 20811177 DOI: 10.1097/aco.0b013e32833f3f68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Schelkanova I, Toronov V. Optimal quantitation of the cerebral hemodynamic response in functional near-infrared spectroscopy. OPTICS EXPRESS 2010; 18:19386-19395. [PMID: 20940834 DOI: 10.1364/oe.18.019386] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We have compared cerebral hemodynamic changes measured by near-infrared spectroscopy (NIRS) with simultaneously acquired BOLD fMRI signals during breath hold challenge in humans. The oxy- and deoxyhemoglobin concentration changes were obtained from the same broadband NIRS data using four different quantitation methods. One method used only two wavelengths (690 nm and 830 nm), and three other methods used broadband data with different spectral fitting algorithms. We found that the broadband techniques employing spectral derivatives were significantly superior to the multi-wavelength methods in terms of the correlation with the BOLD signals. In two cases out of six we found that the time courses of the deoxyhemoglobin changes produced by the two-wavelength method were qualitatively inconsistent with the BOLD fMRI signals.
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Affiliation(s)
- Irina Schelkanova
- Department of Physics, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
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