OXYGEN INTAKE AND CARDIAC-OUTPUT DURING MAXIMAL TREADMILL AND BICYCLE EXERCISE
OXYGEN INTAKE AND CARDIAC-OUTPUT DURING MAXIMAL TREADMILL AND BICYCLE EXERCISE
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DOI：
10.1152/jappl.1972.32.2.185
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发表时间：
1972-01-01
影响因子：
3.3
通讯作者：
HONDA, Y
中科院分区：
文献类型：
--
作者：
MIYAMURA, M;HONDA, Y
方法采用道格拉斯袋法测定摄氧量；呼吸阀直径30mm，连接管内径33mm。过期气体每分钟被收集到一个塑料袋里，直到耗尽为止。收集的气体体积用湿式气体计测量，气体分析用肖兰德微量气体分析仪重复进行。心输出量由CO2技术测定：Pacoz由红外COa分析仪（Beckman, LB-I）在最大到期点测量的~~~~~值估计。通过再呼吸混合气体（O中含有5%的CO2）来估算Pvo，该方法由Jernerus等人（12）和Klausen（13）设计。根据得到的Pacoa和Pv值，在CO2解离曲线上读出Cacoz和Cacoz的值。从测谎仪记录中读取心率和呼吸频率。
METHODSOxygen intake was determined by the Douglas bag technique; the diameter of the respiratory valve was 30 mm, and the inner diameter of the connecting tube was 33 mm. Expired gas was collected in a vinyl bag every minute until exhaustion. The collected gas volume was measured with a wet gasometer, and gas analysis was performed in duplicate with the Scholander micro-gas analyzer. Cardiac output was determined by the CO2 technique: Pacoz was estimated from the~~~~~ value measured with an infrared COa analyzer (Beckman, LB-I) at the point of maximal expiration. Pvo,, was estimated by rebreathing a gas mixture (5% CO2 in O,), a method which was devised by Jernerus et al.(12) and Klausen (13). From the Pacoa and Pv,,, thus obtained, the values of Cacoz and Cvooz were read on the CO2 dissociation curve. Heart rate and respiratory frequency were read from the polygraphic recording.