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The clinical usefulness of tissue reflection spectrophotometry in the prognosis of ischemic limbs was evaluated. The diseased group (n = 12) consisted of 7 cases of femoral artery thrombosis, 4 cases of chronic obstructive arteriosclerosis and 1 case of femoral vein thrombosis. The normal control group consisted of 14 limbs in 7 normal subjects (n = 14). Index of tissue hemoglobin concentration (IHb) was 37.3 +/- 4.5 (n = 14) in the normal control group and 38.5 +/- 16.9 (n = 12) in the diseased group, which was not significantly different. In a subgroup of patients who required amputation or developed necrosis (severe subgroup), the value was 54.2 +/- 1.7 (n = 6). This was significantly higher than the value of 22.8 +/- 8.5 (n = 6) obtained in a subgroup of patients who received the conservative treatment of thrombectomy (mild subgroup) (p &lt; 0.05). Index of tissue oxygen saturation (ISO2) was 28.0 +/- 4.9 (n = 14) in the normal control group, and 9.1 +/- 2.7 (n = 12) in the diseased group (p &lt; 0.05). ISO2 was 7.0 +/- 1.6 (n = 6) in the severe subgroup which was significantly lower than 11.2 +/- 1.9 (n = 6) in the mild subgroup (p &lt; 0.05). Tissue reflection spectrophotometry therefore appears to provide clinically useful information for the prognosis of ischemic limbs.

Clinical Evaluation of Severe Ischemic Limbs by Tissue Reflection Spectrophotometry.