Dorsal Pedal Venous Oximetry as an Outcome Index of Lower Extremity Revascularizations

Abstract

Dorsal pedal venous blood gas analysis was performed in 24 patients with arterial occlusive disease requiring revascularizations of the lower extremities. After the reconstructive surgical procedure, measurements were repeated. It has been observed that this method is useful before surgery since it proves the severity of tissue hypoxia due to perfusion impairment of the foot. Postoperative measurements have detected the effectiveness of the vascular restorations. The results of the trial showed a mean increase in partial pressure of venous blood oxygen (Pvo2) and pH of 30.3% and 13.7% (p<0.05), respectively and a mean decrease in partial pressure of arterial carbon dioxide (Pco2) of 12.9% (p<0.05) between initial and postsurgical measurements in involved legs. In the healthy, unoperated on side, there was no significant (p>0.05) change in response to arterial reconstructions. Symptoms decreased markedly in direct proportion to the increase in dorsal pedal venous Po2 induced by changes in blood flow. This method can be reliably used for assessing the treatment to ensure adequate oxygen delivery to the foot as a result of improved pedal perfusion.

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