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Continuous Monitoring of Cerebral Autoregulation in Adults Supported by Extracorporeal Membrane Oxygenation

BACKGROUND: Impaired cerebral autoregulation (CA) is one of several proposed mechanisms of acute brain injury in patients supported by extracorporeal membrane oxygenation (ECMO). The primary aim of this study was to determine the feasibility of continuous CA monitoring in adult ECMO patients. Our se...

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Autores principales: Zhang, Lucy Q, Chang, Henry, Kalra, Andrew, Humayun, Mariyam, Rosenblatt, Kathryn R, Shah, Vishank A, Geocadin, Romergryko G, Brown, Charles H, Kim, Bo Soo, Whitman, Glenn J.R., Rivera-Lara, Lucia, Cho, Sung-min
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Journal Experts 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10543291/
https://www.ncbi.nlm.nih.gov/pubmed/37790309
http://dx.doi.org/10.21203/rs.3.rs-3300834/v1
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author Zhang, Lucy Q
Chang, Henry
Kalra, Andrew
Humayun, Mariyam
Rosenblatt, Kathryn R
Shah, Vishank A
Geocadin, Romergryko G
Brown, Charles H
Kim, Bo Soo
Whitman, Glenn J.R.
Rivera-Lara, Lucia
Cho, Sung-min
author_facet Zhang, Lucy Q
Chang, Henry
Kalra, Andrew
Humayun, Mariyam
Rosenblatt, Kathryn R
Shah, Vishank A
Geocadin, Romergryko G
Brown, Charles H
Kim, Bo Soo
Whitman, Glenn J.R.
Rivera-Lara, Lucia
Cho, Sung-min
author_sort Zhang, Lucy Q
collection PubMed
description BACKGROUND: Impaired cerebral autoregulation (CA) is one of several proposed mechanisms of acute brain injury in patients supported by extracorporeal membrane oxygenation (ECMO). The primary aim of this study was to determine the feasibility of continuous CA monitoring in adult ECMO patients. Our secondary aims were to describe changes in cerebral oximetry index (COx) and other metrics of CA over time and in relation to functional neurologic outcomes. METHODS: This is a single-center prospective observational study. We measured Cox, a surrogate measurement of cerebral blood flow, measured by near-infrared spectroscopy, which is an index of CA derived from the moving correlation between mean arterial pressure and slow waves of regional cerebral oxygen saturation. A COx value that approaches 1 indicates impaired CA. Using COx, we determined the optimal MAP (MAP(OPT)), lower and upper limits of autoregulation for individual patients. These measurements were examined in relation to modified Rankin Scale (mRS) scores. RESULTS: Fifteen patients (median age=57 years [IQR=47–69]) with 150 autoregulation measurements were included for analysis. Eleven were on veno-arterial ECMO and 4 on veno-venous. Mean COx was higher on post-cannulation day 1 than on day 2 (0.2 vs 0.09, p<0.01), indicating improved CA over time. COx was higher in VA-ECMO patients than in VV-ECMO (0.12 vs 0.06, p=0.04). Median MAP(OPT) for entire cohort was highly variable, ranging 55–110 mmHg. Patients with mRS 0–3 (good outcome) at 3 and 6 months spent less time outside of MAP(OPT) compared to patients with mRS 4–6 (poor outcome) (74% vs 82%, p=0.01). The percentage of time when observed MAP was outside the limits of autoregulation was higher on post-cannulation day 1 than on day 2 (18.2% vs 3.3%, p<0.01). CONCLUSIONS: In ECMO patients, it is feasible to monitor CA continuously at the bedside. CA improved over time, most significantly between post-cannulation days 1 and 2. CA was more impaired in VA-ECMO than VV-ECMO. Spending less time outside of MAP(OPT) may be associated with achieving a good neurologic outcome.
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spelling pubmed-105432912023-10-03 Continuous Monitoring of Cerebral Autoregulation in Adults Supported by Extracorporeal Membrane Oxygenation Zhang, Lucy Q Chang, Henry Kalra, Andrew Humayun, Mariyam Rosenblatt, Kathryn R Shah, Vishank A Geocadin, Romergryko G Brown, Charles H Kim, Bo Soo Whitman, Glenn J.R. Rivera-Lara, Lucia Cho, Sung-min Res Sq Article BACKGROUND: Impaired cerebral autoregulation (CA) is one of several proposed mechanisms of acute brain injury in patients supported by extracorporeal membrane oxygenation (ECMO). The primary aim of this study was to determine the feasibility of continuous CA monitoring in adult ECMO patients. Our secondary aims were to describe changes in cerebral oximetry index (COx) and other metrics of CA over time and in relation to functional neurologic outcomes. METHODS: This is a single-center prospective observational study. We measured Cox, a surrogate measurement of cerebral blood flow, measured by near-infrared spectroscopy, which is an index of CA derived from the moving correlation between mean arterial pressure and slow waves of regional cerebral oxygen saturation. A COx value that approaches 1 indicates impaired CA. Using COx, we determined the optimal MAP (MAP(OPT)), lower and upper limits of autoregulation for individual patients. These measurements were examined in relation to modified Rankin Scale (mRS) scores. RESULTS: Fifteen patients (median age=57 years [IQR=47–69]) with 150 autoregulation measurements were included for analysis. Eleven were on veno-arterial ECMO and 4 on veno-venous. Mean COx was higher on post-cannulation day 1 than on day 2 (0.2 vs 0.09, p<0.01), indicating improved CA over time. COx was higher in VA-ECMO patients than in VV-ECMO (0.12 vs 0.06, p=0.04). Median MAP(OPT) for entire cohort was highly variable, ranging 55–110 mmHg. Patients with mRS 0–3 (good outcome) at 3 and 6 months spent less time outside of MAP(OPT) compared to patients with mRS 4–6 (poor outcome) (74% vs 82%, p=0.01). The percentage of time when observed MAP was outside the limits of autoregulation was higher on post-cannulation day 1 than on day 2 (18.2% vs 3.3%, p<0.01). CONCLUSIONS: In ECMO patients, it is feasible to monitor CA continuously at the bedside. CA improved over time, most significantly between post-cannulation days 1 and 2. CA was more impaired in VA-ECMO than VV-ECMO. Spending less time outside of MAP(OPT) may be associated with achieving a good neurologic outcome. American Journal Experts 2023-09-21 /pmc/articles/PMC10543291/ /pubmed/37790309 http://dx.doi.org/10.21203/rs.3.rs-3300834/v1 Text en https://creativecommons.org/licenses/by/4.0/This work is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/) , which allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use.
spellingShingle Article
Zhang, Lucy Q
Chang, Henry
Kalra, Andrew
Humayun, Mariyam
Rosenblatt, Kathryn R
Shah, Vishank A
Geocadin, Romergryko G
Brown, Charles H
Kim, Bo Soo
Whitman, Glenn J.R.
Rivera-Lara, Lucia
Cho, Sung-min
Continuous Monitoring of Cerebral Autoregulation in Adults Supported by Extracorporeal Membrane Oxygenation
title Continuous Monitoring of Cerebral Autoregulation in Adults Supported by Extracorporeal Membrane Oxygenation
title_full Continuous Monitoring of Cerebral Autoregulation in Adults Supported by Extracorporeal Membrane Oxygenation
title_fullStr Continuous Monitoring of Cerebral Autoregulation in Adults Supported by Extracorporeal Membrane Oxygenation
title_full_unstemmed Continuous Monitoring of Cerebral Autoregulation in Adults Supported by Extracorporeal Membrane Oxygenation
title_short Continuous Monitoring of Cerebral Autoregulation in Adults Supported by Extracorporeal Membrane Oxygenation
title_sort continuous monitoring of cerebral autoregulation in adults supported by extracorporeal membrane oxygenation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10543291/
https://www.ncbi.nlm.nih.gov/pubmed/37790309
http://dx.doi.org/10.21203/rs.3.rs-3300834/v1
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