Menninger R P, Baker C H
Proc Soc Exp Biol Med. 1975 Mar;148(3):669-74. doi: 10.3181/00379727-148-38607.
Abrupt elevation of venous pressure causes an initial rapid and a secondary slow increase in total tissue volume (plethysmography). Changes in total tissue volume and blood conductivity from the isovolumetric state were determined to assess what factors determined the two components of the tissue volume change. The initial component of the plethysmograph record would appear to be 90% vascular volume change and 10% extra-vascular volume change. Since the two techniques measured identical amounts of capillary filtration during the second component of the recording there would seem to be no slow component of vascular volume increase following venous pressure elevation. Evidence that elevation of venous pressure causes myogenic closure of precapillary vessels isolating a segment of the microvasculature is presented.
静脉压突然升高会导致总组织体积（体积描记法）先出现快速增加，随后缓慢增加。通过测定等容状态下总组织体积和血液电导率的变化，以评估哪些因素决定了组织体积变化的两个组成部分。体积描记图记录的初始部分似乎90%是血管体积变化，10%是血管外体积变化。由于在记录的第二部分，两种技术测量的毛细血管滤过量相同，静脉压升高后似乎不存在血管体积缓慢增加的部分。本文提供了静脉压升高导致毛细血管前血管肌源性关闭从而隔离一部分微循环的证据。
