Improving Neurologic Outcome in Off-Pump Surgery: The "No Touch" Technique
Background: As patients referred for cardiac surgery include increasingly older individuals, the prevalence of comorbid factors, such as previous cerebrovascular disease, carotid disease, aortic atherosclerosis, and reoperations, is on the rise. Avoiding manipulation of the ascending aorta in this high-risk subgroup may become a necessity to perform safe coronary artery bypass grafting (CABG) surgery.
Methods: We retrospectively reviewed our database of 640 off-pump CABG patients and identified 84 patients in whom we adopted the "no touch" technique (NTT). Revascularization was carried out with single or bilateral internal thoracic arteries (ITA) and by connecting additional coronary grafts (saphenous vein, radial artery) in a T or Y configuration. The right gastroepiploic artery was used as a conduit in 2 patients. The brachiocephalic artery was used as an alternative inflow site in 3 patients (reoperation).
Results: Age, sex, risk factors, functional class, and history of congestive heart failure were comparable in the two groups. In the NTT group, the frequencies were higher for severe atherosclerosis of the aorta (13% versus 0%; P = .00), carotid disease (25% versus 16%; P = .02), and history of previous cerebrovascular accidents (17% versus 8%; P = .04). Complete revascularization was achieved in 96% of the patients in the off-pump CABG group, compared with 90% in the NTT group (P = .17). No differences in the prevalence of postoperative low cardiac output syndrome, intra-aortic balloon pump use, perioperative myocardial infarction, or operative mortality at 30 days were observed between the two groups. In the NTT group, weak trends toward a lower incidence of postoperative delirium (8% versus 15%; P = .12), a lower incidence of stroke (0% versus 1%; P = .85), and a shorter intensive care unit stay (P = .07) were observed. Hospital stay was also shorter in the NTT group (P = .04).
Conclusion: Avoiding aortic manipulations in patients with severe atherosclerosis of the aorta, carotid disease, and a previous history of cerebrovascular accidents is technically feasible
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