Kuribayashi S, Garnic J D, Abrams H L
Invest Radiol. 1982 Nov-Dec;17(6):561-6. doi: 10.1097/00004424-198211000-00007.
The magnitude and timing of the effects of postural change on pulmonary blood flow distribution were studied in dogs by means of computed tomography (CT) and radioactive microspheres. A change in the mean attenuation values was demonstrated by CT in the anterior and posterior lung zones after change from the supine to the prone position. Similarly, a significant shift in blood flow distribution, as measured by microspheres, occurred rapidly, within 1 minute of the time of change from upright to supine position. These data confirm the importance of gravity in determining blood flow distribution in the lungs and demonstrate that maximum readjustments occur within 1 minute after postural change.
通过计算机断层扫描（CT）和放射性微球技术，研究了体位改变对犬肺血流分布影响的程度和时间。从仰卧位变为俯卧位后，CT显示前后肺区的平均衰减值发生了变化。同样，通过微球测量，在从直立位变为仰卧位后的1分钟内，血流分布迅速发生了显著变化。这些数据证实了重力在决定肺内血流分布中的重要性，并表明体位改变后1分钟内会发生最大程度的重新调整。
