Noninvasive measurement of femoral artery pressure for evaluating aortoiliac occlusive disease.
Femoral systolic pressures measured by a compression technique (FSCP), were compared with proximal thigh systolic pressures (PTSP), for evaluation of aortoiliac occlusive disease. In phase I FSCP were measured by compressing the artery with a pressure cuff rolled into a cylinder and using disappearance of the profunda femoris Doppler signal (FSCP-D), or flattening of thigh plethysmographic waveforms (FSCP-P), as sensors. In normal extremities the compression techniques yielded false high values. The mean ratio of FSCP-D to brachial systolic pressure, FSCP-D/BSP, was 1.25 +/- 0.06 and the mean FSCP-P/BSP was 1.37 +/- 0.15, a value approximately equal to the mean PTSP/BSP, 1.38 +/- 0.20. In patients with aortoiliac occlusive disease linear regression analysis revealed a good correlation between FSCP-D/BSP and direct intraoperative measurements of femoral/aortic systolic pressure, FSP/ASP, (R = 0.79 and R2 = 0.63), a fair correlation between FSCP-P/BSP and FSP/ASP (R = 0.49, R2 = 0.24) but a poor correlation between PTSP/BSP and FSP/ASP (R = 0.35, R2 = 0.12). In phase II studies a soft bladder was used for arterial compression. In normal extremities the mean FSCP-D/BSP was 1.07 +/- 0.06, close to the predicted normal value of 1.00. In a second group of patients with occlusive disease a better correlation was observed between values of FSCP-D/BSP and FSP/ASP (R = 0.91, R2 = 0.82), than any of the correlations of noninvasive measurements with direct intraoperative values of FSP/ASP obtained in the first phase of the study.
D000328:Adult; D000368:Aged; D001011:Aorta; D001157:Arterial Occlusive Diseases / Q000503:physiopathology*; D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000295:instrumentation / Q000379:methods*; D005260:Female; D005263:Femoral Artery / Q000502:physiology*; D006801:Humans; D007083:Iliac Artery; D007432:Intraoperative Period; D008297:Male; D008875:Middle Aged; D011150:Popliteal Artery; D011312:Pressure; D013223:Statistics as Topic; D013848:Thigh / Q000098:blood supply