憋气对大学生运动员脑血流速度的影响研究

Effect of Expiratory Straining on Cerebral Blood Flow Velocity

探讨憋气对脑血流速度的影响。方法:在憋气时及其先前的休息期,对20名正常的大学生运动员用经颅多普勒(TCD)监测其左侧大脑中动脉血流速度的变化.结果:憋气早期脑血流速度显著性增加,憋气中期,脑血流速度显著性减小,憋气后期,脑血流速度有所回升,但仍显著低于基线期测定值。结论:憋气可降低脑血流速度和大脑灌注压。

The paper evalnates the influence of expiratory straining on cerebral blood flow velocity （CBFV）. Methods： Simultaneous left transcranial Doppler（TCD）monitoring of CBFV in the middle cerebral arteries （MCAs）was performed in 20 normal college students during expiratory staining and its preceding rest period. Results： CBFV increased significantly during the early part of expiratory straining, CBFV decreased significantly during the middle part of expiratory straining. CBFV rose quite a bit, but still was below the baseline value during the late part of expiratory straining. Conclusion ： Expiratory straining can reduce cerebral blood flow velocity and the cerebral, perfusion pressure.