Cerebral Flow-metabolism Coupling During Adult Surgery

Summary

The brain is a highly active organ that requires a large blood flow to function properly. Normally, blood flow is tightly linked to the brain's energy demands. However, during surgery, anesthesia can affect this relationship in different ways. Some types of anesthesia can decrease blood flow to the brain, while others can increase it. Anesthesiologists need to be careful to maintain adequate blood flow to the brain during surgery, especially when blood pressure drops. Drugs may be used to increase blood pressure, but some of these drugs can also affect blood flow to the brain. It is still unclear how to best maintain blood flow to the brain during surgery and how different types of anesthesia and drugs affect this process. The study aims to assess the clinical utility of a new technique that uses light-based neuromonitoring to measure changes in cerebral blood flow and metabolism. The investigators will recruit 80 adult patients undergoing surgery under general anesthesia and randomize them into one of four groups to evaluate the effects of different anesthetic agents and vasopressors on brain hemodynamics and metabolism. The study will include patients over 18 years of age with no history of neurological conditions, substance abuse, or contraindications to cerebral oximetry devices or specific anesthetic agents. The patients will receive standard anesthesia care and be monitored with our light-based neuromonitoring system. This study aims to demonstrate the device's ability to detect changes in cerebral hemodynamic parameters related to anesthesia induction and systemic hypotension. This study will also evaluate the effects of anesthetic maintenance agents and vasopressors on cerebral hemodynamics and neurovascular coupling.

Timeline

Start

2023-10-03

Primary completion

2025-12-31

Completion

2025-12-31

Publications

• Background Murkin JM. Cerebral oximetry: monitoring the brain as the index organ. Anesthesiology. 2011 Jan;114(1):12-3. doi: 10.1097/ALN.0b013e3181fef5d2. No abstract available.
• Background Jonsson M, Lindstrom D, Wanhainen A, Djavani Gidlund K, Gillgren P. Near Infrared Spectroscopy as a Predictor for Shunt Requirement During Carotid Endarterectomy. Eur J Vasc Endovasc Surg. 2017 Jun;53(6):783-791. doi: 10.1016/j.ejvs.2017.02.033. Epub 2017 Apr 19.
• Background Khozhenko A, Lamperti M, Terracina S, Bilotta F. Can Cerebral Near-infrared Spectroscopy Predict Cerebral Ischemic Events in Neurosurgical Patients? A Narrative Review of the Literature. J Neurosurg Anesthesiol. 2019 Oct;31(4):378-384. doi: 10.1097/ANA.0000000000000522.
• Background Khan JM, McInnis CL, Ross-White A, Day AG, Norman PA, Boyd JG. Overview and Diagnostic Accuracy of Near Infrared Spectroscopy in Carotid Endarterectomy: A Systematic Review and Meta-analysis. Eur J Vasc Endovasc Surg. 2021 Nov;62(5):695-704. doi: 10.1016/j.ejvs.2021.08.022. Epub 2021 Oct 6.
• Background Milej D, Shahid M, Abdalmalak A, Rajaram A, Diop M, St Lawrence K. Characterizing dynamic cerebral vascular reactivity using a hybrid system combining time-resolved near-infrared and diffuse correlation spectroscopy. Biomed Opt Express. 2020 Jul 23;11(8):4571-4585. doi: 10.1364/BOE.392113. eCollection 2020 Aug 1.
• Background Milej D, He L, Abdalmalak A, Baker WB, Anazodo UC, Diop M, Dolui S, Kavuri VC, Pavlosky W, Wang L, Balu R, Detre JA, Amendolia O, Quattrone F, Kofke WA, Yodh AG, St Lawrence K. Quantification of cerebral blood flow in adults by contrast-enhanced near-infrared spectroscopy: Validation against MRI. J Cereb Blood Flow Metab. 2020 Aug;40(8):1672-1684. doi: 10.1177/0271678X19872564. Epub 2019 Sep 9.
• Background Abdalmalak A, Milej D, Diop M, Shokouhi M, Naci L, Owen AM, St Lawrence K. Can time-resolved NIRS provide the sensitivity to detect brain activity during motor imagery consistently? Biomed Opt Express. 2017 Mar 13;8(4):2162-2172. doi: 10.1364/BOE.8.002162. eCollection 2017 Apr 1.
• Background Durduran T, Yodh AG. Diffuse correlation spectroscopy for non-invasive, micro-vascular cerebral blood flow measurement. Neuroimage. 2014 Jan 15;85 Pt 1(0 1):51-63. doi: 10.1016/j.neuroimage.2013.06.017. Epub 2013 Jun 14.
• Background Selb J, Boas DA, Chan ST, Evans KC, Buckley EM, Carp SA. Sensitivity of near-infrared spectroscopy and diffuse correlation spectroscopy to brain hemodynamics: simulations and experimental findings during hypercapnia. Neurophotonics. 2014 Jul;1(1):015005. doi: 10.1117/1.NPh.1.1.015005.
• Background Verdecchia K, Diop M, Lee A, Morrison LB, Lee TY, St Lawrence K. Assessment of a multi-layered diffuse correlation spectroscopy method for monitoring cerebral blood flow in adults. Biomed Opt Express. 2016 Aug 24;7(9):3659-3674. doi: 10.1364/BOE.7.003659. eCollection 2016 Sep 1.
• Background Rajaram A, Milej D, Suwalski M, Kebaya L, Kewin M, Yip L, de Ribaupierre S, Han V, Diop M, Bhattacharya S, St Lawrence K. Assessing cerebral blood flow, oxygenation and cytochrome c oxidase stability in preterm infants during the first 3 days after birth. Sci Rep. 2022 Jan 7;12(1):181. doi: 10.1038/s41598-021-03830-7.
• Background Rajaram A, Milej D, Suwalski M, Yip LCM, Guo LR, Chu MWA, Chui J, Diop M, Murkin JM, St Lawrence K. Optical monitoring of cerebral perfusion and metabolism in adults during cardiac surgery with cardiopulmonary bypass. Biomed Opt Express. 2020 Sep 29;11(10):5967-5981. doi: 10.1364/BOE.404101. eCollection 2020 Oct 1.
• Background Kaya K, Zavriyev AI, Orihuela-Espina F, Simon MV, LaMuraglia GM, Pierce ET, Franceschini MA, Sunwoo J. Intraoperative Cerebral Hemodynamic Monitoring during Carotid Endarterectomy via Diffuse Correlation Spectroscopy and Near-Infrared Spectroscopy. Brain Sci. 2022 Aug 2;12(8):1025. doi: 10.3390/brainsci12081025.

Drugs

Indications

No indication recorded.