摘要
观察了15例心内直视手术病人在低温体外循环主动脉阻断后1min,体温最低时、开放主动脉前1min的氧供(DO_2)、氧耗(VO_2)、氧摄取率(ERO_2)及动脉血乳酸(LA)含量的变化。结果显示:在整个主动脉阻断期间DO_2无明显变化;体温最低时VO_2,ERO_2显著降低,而LA含量显著增高;开放主动脉前1min与主动脉阻断后1min比较,鼻咽温无明显变化,直肠温显著降低,而VO_2,ERO_2及LA含量显著增高。
e observed the changes of oxygen delivery(DO2),oxygen consumption(VO2),oxygen ex-traction rate(ERO2)and plasma lactate(LA)during hypothermic cardiopulmonary bypass(CPB)with aortic cross clamping in 15 patients undergoing heart surgery. Results:There was nosignificant difference in DO2.VO2, ERO2 decreased and the LA increased significantly at the low-est temperature. One minute before the relief from aortic clamping was compared with 1 minuteafter clamping aortic artery:there was no significant difference in nasopharynged temperature,the rectal temperature decreased significantly,while VO2, ERO2 and LA increased significantly.Conclusion:There was tissue hypoxia at the lowest temperature during hypothermic CPB withaortic cross clamping because tissue oxygen extraction was lower than tissue oxygen demand.Itis important to increase DO2 in order to fulfill the tissue oxygen demand during rewarming.
出处
《湖南医科大学学报》
CSCD
1996年第3期256-258,共3页
Bulletin of Hunan Medical University
关键词
体外循环
低温
氧供
氧消耗
乳酸
Cardiopulmonary bypass
Hypothermia
Oxygen delivery
Oxygen con-sumption
Lactate