Itaya K, Manaka Y, Ohkubo C, Asano M
Acupunct Electrother Res. 1987;12(1):45-51. doi: 10.3727/036012987816951121.
Microcirculatory effects of the application of an acupuncture needle (32-gauge, silver) to the back, corresponding to Geshu (B17) in human beings, were studied in vivo by microscope, using a transparent ear chamber in conscious rabbits. Although no striking findings were obtained during the needle application for a period of 30 minutes, it was clearly observed that the microvascular blood flow increases gradually in parallel with augmenting spontaneous rhythmic fluctuation of the vessel diameter, namely vasomotion, throughout a continuous observation period longer than 2 hours following release from the needle application. Diameters of arterioles and venules at the full-dilating phases of vasomotion reached levels higher than 200% and 250% of the initial values just before application of the needle, respectively. The clinical efficacy of acupuncture was suggested to be explained at least in part by the increased rhythmic microvascular blood flow in parallel with vasomotion, from the physiological point of view based on the previous investigations.
在清醒家兔身上使用透明耳室，通过显微镜在活体状态下研究了将一根32号银针针刺于人体背部膈俞穴（B17）对应部位后的微循环效应。尽管在针刺30分钟期间未获得显著发现，但在停止针刺后的连续观察期超过2小时内，清楚地观察到微血管血流随着血管直径自发节律性波动（即血管运动）的增强而逐渐增加。在血管运动的完全扩张阶段，小动脉和小静脉的直径分别达到针刺前初始值的200%和250%以上。根据先前的研究，从生理学角度来看，针刺的临床疗效至少部分可以通过与血管运动平行的有节律的微血管血流增加来解释。
