头低位-15°倾斜期间鼻粘膜微循环的变化

Changes of Microcirculation in Nasal Mucosa during -15° Head-Down Tilt.

采用激光多普勒血流计，观察到１９名青年被试者在２．５ｈ头低位－１５°倾斜期间鼻粘膜微循环发生了明显改变。头低位后，微血管血流量、浓度和流速明显高于实验前，并出现明显的微血管规律性波动。结果提示：体液头向分布所引起的鼻粘膜微循环变化是造成航天中航天员鼻塞和呼吸不畅的重要起因之一。

Changes of microcirculation in nasal mucosa in 19 young men during 2.5h head-down -15° tilt (DHT) were observed with Laser Doppler Flowmetry.The results showed that the change of microcirculation in nasal mucosa was significant,blood volume,concentration and the velocity of blood flow increased,and distinct periodical wave of microvessels appeared during HDT.The results suggest that the change of microcirculation in nasal mucosa caused by fluid shift from the lower to the upper body is one of the important factors causing stuffy nose and breathe with a little difficulty.