Noninvasive Cerebral Imaging and Monitoring Using Electrical Impedance Tomography During Total Aortic Arch Replacement

Journal of Cardiothoracic and Vascular Anesthesia
Yandong LiXuetao Shi

Abstract

To explore the feasibility of using electrical impedance tomography (EIT) to provide noninvasive cerebral imaging and monitoring in total aortic arch replacement (TAAR). A prospective, observational study. Department of cardiovascular surgery in a university hospital. Forty-two patients undergoing TAAR using hypothermic circulatory arrest and unilateral antegrade cerebral perfusion. None. Cerebral impedances of the patients were monitored intraoperatively by an EIT system. The prognostic information of the patients, including postoperative neurological dysfunction, was collected during their hospitalizations. Eight (19.0%) subjects had at least 1 postoperative neurological dysfunction complication. The results show that cerebral impedance was related negatively to perfusion flow, and the gradual increase in cerebral resistivity might reflect the evolving process of brain tissue caused by hypoxia. Maximum resistivity asymmetry index was extracted from the reconstructed images to quantify the pathological changes of the brain. The area under the receiver operating characteristic curve of maximum resistivity asymmetry index for postoperative neurological dysfunction was 0.864. In multivariate logistic regression, maximum resistivi...Continue Reading

Citations

Aug 28, 2020·Circulation·Mario GaudinoUNKNOWN American Heart Association Council on Cardiovascular Surgery and Anesthesia; Stroke Council; and Council on Cardiovascular a

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