Nakai Y, Imanaka M, Nishio J, Ogita S
Department of Obstetrics and Gynaecology, School of Medicine, Osaka City University, Japan.
Gynecol Obstet Invest. 1997;43(1):64-7. doi: 10.1159/000291822.
Venous pulsatile flows were detected by pulsed Doppler flow velocimetry throughout the entire umbilical cord in 2 cases of intrauterine growth retardation. Although the hearts of these fetuses had no anomalies and their inferior vena cava flows had normal flow velocity patterns, their cords were severely coiled. In these cases, the pulsatile flow in the umbilical cord vein was caused not by an increase in the preload of the fetal heart, but only by hypercoiling of the umbilical cord. This phenomenon also suggests that the coiled umbilical cord exerts a pump-like effect known as a 'pulsometer'.
在2例宫内生长受限病例中，通过脉冲多普勒血流测速法在整个脐带中检测到静脉搏动血流。尽管这些胎儿的心脏没有异常，其下腔静脉血流具有正常的流速模式，但他们的脐带严重盘绕。在这些病例中，脐静脉中的搏动血流不是由胎儿心脏前负荷增加引起的，而仅仅是由脐带过度盘绕引起的。这种现象还表明，盘绕的脐带发挥了一种被称为“脉搏计”的泵样作用。
