Near-infrared spectroscopic assessment of oxygen delivery to free flaps on monkeys following vascular occlusions and inhalation of pure oxygen

Fenghua Tian; Haishu Ding; Zhigang Cai; Guangzhi Wang; Fuyun Zhao

doi:10.1117/12.462567

12 April 2002 Near-infrared spectroscopic assessment of oxygen delivery to free flaps on monkeys following vascular occlusions and inhalation of pure oxygen

Fenghua Tian, Haishu Ding, Zhigang Cai, Guangzhi Wang, Fuyun Zhao

Author Affiliations +

Proceedings Volume 4536, International Workshop on Photonics and Imaging in Biology and Medicine; (2002) https://doi.org/10.1117/12.462567
Event: International Workshop on Photonics and Imaging in Biology and Medicine, 2001, Wuhan, China

Abstract

In recent studies, near-infrared spectroscopy (NIRS) has been considered as a potentially ideal noninvasive technique for the postoperative monitoring of plastic surgery. In this study, free flaps were raised on rhesus monkeys' forearms and oxygen delivery to these flaps was monitored following vascular occlusions and inhalation of pure oxygen. Optical fibers were adopted in the probe of the oximeter so that the detection could be performed in reflectance mode. The distance between emitter and detector can be adjusted easily to achieve the best efficacy. Different and repeatable patterns of changes were measured following vascular occlusions (arterial occlusion, venous occlusion and total occlusion) on flaps. It is clear that the near-infrared spectroscopy is capable of postoperatively monitoring vascular problems in flaps. NIRS showed high sensitivity to detect the dynamic changes in flaps induced by inhalation of pure oxygen in this study. The experimental results indicated that it was potential to assess tissue viability utilizing the dynamic changes induced by a noninvasive stimulation. It may be a new assessing method that is rapid, little influenced by other factors and brings less discomfort to patients.

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Fenghua Tian, Haishu Ding, Zhigang Cai, Guangzhi Wang, and Fuyun Zhao "Near-infrared spectroscopic assessment of oxygen delivery to free flaps on monkeys following vascular occlusions and inhalation of pure oxygen", Proc. SPIE 4536, International Workshop on Photonics and Imaging in Biology and Medicine, (12 April 2002); https://doi.org/10.1117/12.462567

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KEYWORDS

Oxygen

Near infrared spectroscopy

Surgery

Tissue optics

Tissues

Optical fibers

Absorbance

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