Abstract
Background: Near-infrared spectroscopy (NIRS) is a noninvasive technique that allows continuous monitoring of the regional hemoglobin oxygen saturation (rSO2) index. We evaluated its application to survey perioperative lower limb perfusion. Methods: A total of 10 patients (7 men, aged 71) were monitored during abdominal surgery for aortic aneurysms. The rSO2 index was measured at the M gastrocnemius (optode 1) and at the dorsum of the foot (optode 2). Results: Mean baseline rSO2 values for optodes 1 and 2 were 67 and 66, respectively. After clamping the aorta or iliacofemoral arteries, rSO2 dropped to 32 for optode 1 (P < .0001) and to 27 for optode 2 (P < .0001). After declamping, rSO2 increased to 74 for optode 1 (P = .0012 vs baseline) and also to 74 for optode 2 (P = .0018 vs baseline). Conclusion: Near-infrared spectroscopy is an easily applicable, noninvasive tool for continuous surveillance of lower extremity perfusion during aortic reconstruction.
Keywords
Get full access to this article
View all access options for this article.
