Hiatt W R, Huang S Y, Regensteiner J G, Micco A J, Ishimoto G, Manco-Johnson M, Drose J, Reeves J T
Department of Medicine, University of Colorado Health Sciences Center, Denver 80262.
J Appl Physiol (1985). 1989 May;66(5):2239-44. doi: 10.1152/jappl.1989.66.5.2239.
The measurement of peripheral blood flow by plethysmography assumes that the cuff pressure required for venous occlusion does not decrease arterial inflow. However, studies in five normal subjects suggested that calf blood flow measured with a plethysmograph was less than arterial inflow calculated from Doppler velocity measurements. We hypothesized that the pressure required for venous occlusion may have decreased arterial velocity. Further studies revealed that systolic diameter of the superficial femoral artery under a thigh cuff decreased from 7.7 +/- 0.4 to 5.6 +/- 0.7 mm (P less than 0.05) when the inflation pressure was increased from 0 to 40 mmHg. Cuff inflation to 40 mmHg also reduced mean velocity 38% in the common femoral artery and 47% in the popliteal artery. Inflation of a cuff on the arm reduced mean velocity in the radial artery 22% at 20 mmHg, 26% at 40 mmHg, and 33% at 60 mmHg. We conclude that inflation of a cuff on an extremity to low pressures for venous occlusion also caused a reduction in arterial diameter and flow velocity.
通过体积描记法测量外周血流时假定静脉闭塞所需的袖带压力不会降低动脉血流。然而，对5名正常受试者的研究表明，用体积描记仪测量的小腿血流量低于根据多普勒速度测量计算出的动脉血流量。我们推测静脉闭塞所需的压力可能降低了动脉速度。进一步研究发现，当充气压力从0增加到40 mmHg时，大腿袖带下股浅动脉的收缩期直径从7.7±0.4 mm降至5.6±0.7 mm（P<0.05）。袖带充气至40 mmHg也使股总动脉的平均速度降低38%，腘动脉降低47%。手臂上袖带充气至20 mmHg时使桡动脉平均速度降低22%，40 mmHg时降低26%，60 mmHg时降低33%。我们得出结论，将肢体上的袖带充气至低压力以进行静脉闭塞也会导致动脉直径和流速降低。
