Association of Early Perioperative Stroke After Cardiothoracic Surgery with Intraoperative Regional Cerebral Oxygenation Using Near-infrared Spectroscopy: an Observational Cohort Study Comparing Affected Versus Non-affected Hemispheres

Overview

Journal J Clin Monit Comput

Publisher Springer

Specialties Anesthesiology
General Medicine
Medical Informatics

Date 2024 Nov 20

PMID 39565465

Authors

Ramon Pierik

Thomas W L Scheeren

Michiel E Erasmus

Walter M van den Bergh

Affiliations

Soon will be listed here.

Abstract

Purpose: Patients undergoing cardiothoracic surgery are at risk of developing perioperative stroke, but residual effects of anesthesia may hamper timely detection. This study aims to determine if there is an association between intraoperative regional cerebral oxygenation (ScO) monitoring using near-infrared spectroscopy (NIRS) and the occurrence of early perioperative stroke within three days after cardiothoracic surgery.

Methods: We performed a single-center retrospective observational cohort study including all consecutive cardiothoracic surgery patients with routinely perioperative ScO monitoring admitted postoperatively to the Intensive Care Unit (ICU) between 2008 and 2017. Patients with a confirmed stroke in the anterior cerebral circulation on brain imaging were included in the analysis. Intraoperative area under the curve (AUC), duration, and total ScO excursions below predefined thresholds (< 50% ScO or > 20% reduction below baseline) were calculated for each hemisphere. Stroke-affected and non-affected hemispheres were compared using logistic regression analyses to investigate a potential association between ScO values and stroke.

Results: Of the 2454 cardiothoracic surgery patients with perioperative ScO monitoring, 39 had a anterior stroke on brain imaging. ScO readings of 44 affected hemispheres were compared to 34 non-affected hemispheres. Only the duration of ScO < 50% or a > 20% drop from baseline were significantly associated with global ischemia (OR 1.30 (0.95%CI; 1.09-2.30)) when comparing affected (72 [5 to 33] min.) versus non-affected (28 [4 to 44] min.) hemispheres.

Conclusion: The duration of ScO values < 50% or a drop > 20% from baseline were associated with the occurrence of early perioperative global cerebral ischemia within three days after cardiothoracic surgery.

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