PMID: 6965513Mar 1, 1980Paper

Neurologic dysfunction following cardiac operation with low-flow, low-pressure cardiopulmonary bypass

The Journal of Thoracic and Cardiovascular Surgery
R Kolkka, M Hilberman

Abstract

A prospective 6 month study of all patients undergoing cardiac operation with cardiopulmonary bypass (CPB) was undertaken to determine the incidence of neurologic and neuropsychological dysfunction following low-flow, low-pressure CPB. Among 204 patients who underwent cardiac operation with CPB, there were seven deaths (3.4%), six who developed new motor deficits (2.9%), and 35 (17.2%) who exhibited some neurologic or neuropsychological dysfunction at discharge. When compared to the 169 patients with no evidence of neurlogic or neuropsychological dysfunction at discharge, these 35 were older (65 +/- 10 versus 55 +/- 12 years), had a lower incidence of coronary artery bypass grafting as the sole surgical procedure (29% versus 55%), a higher mortality rate (11.4% versus 1.8%), and prolonged CPB (140 +/- 45 versus 107 +/- 38 minutes). The mean arterial pressure (MAP) during CPB was similar in the two groups (51 +/- 7 versus 49 +/- 7 torr), and an index of time at low pressure, torr x minutes below 50 (TM less than 50), was also similar in the two groups (589 +/- 591 versus 554 +/- 478 TM less than 50). The incidence of postoperative neurologic and neuropsychological complications appears comparable to that in reports from institut...Continue Reading

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