PMID: 8956748Dec 1, 1996Paper

Oxygenation and blood volume changes in flaps according to near-infrared spectrophotometry

Archives of Otolaryngology--head & Neck Surgery
R E HaydenB Chance

Abstract

To test the ability of near-infrared spectrophotometry (NIRS) to predict vascular compromise in flaps postoperatively. Pilot study. Eleven denervated latissimus dorsi flaps were assessed in 8 pigs. Flaps were isolated on their vascular pedicle. We used NIRS to demonstrate tissue oxygen saturation and quantities of deoxygenated hemoglobin and oxygenated hemoglobin when flaps underwent venous or arterial occlusions. Oxygen saturation (percentage of oxygenated hemoglobin) was calculated as the difference between the 2 light intensities (860-750 nm) with the use of 2 time periods: preoperative (80%) oxygen saturation and during arterial occlusion (0%) oxygen saturation with NIRS. Blood volume changes within the flap were also measured. Arterial occlusion resulted in significant decreases in oxygen saturation and in blood volume with immediate recovery. Venous occlusion resulted in an initial rapid increase in blood volume with no appreciable early deoxygenation. Near-infrared spectrophotometry appears promising as a noninvasive, low-cost, portable bedside monitor that can demonstrate in real time changes in blood volume and oxygen saturation within a flap at a variety of tissue depths.

Citations

Apr 20, 2001·Burns : Journal of the International Society for Burn Injuries·M G SowaH H Mantsch
Jun 26, 2002·Neoplasia : an International Journal for Oncology Research·Vasilis NtziachristosBritton Chance
Dec 7, 2007·Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS·Zhi-gang CaiHai-shu Ding
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Jul 9, 2014·Annals of Plastic Surgery·Robert F LohmanRisal Djohan
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Oct 1, 1999·Journal of Biomedical Optics·M G SowaH H Mantsch
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