成人或儿童心脏或非心脏大手术,作等容血液稀释可减少输血。只要平均动脉压(MAP)≥8kPa,心脏指数(CI)等于或大于2.2L·min~(-1)·min~(-2)和混合静脉血的血氧饱和度(SvO_2)等于或大于60％,则氧输送(DO_2)充足。作者在临床监控条件下,研究大量等容血液稀释的生理学特点,并以检测血红蛋白(Hb),酸碱状态,心脏和循环功能,并与SvO_2比较,从而观察大量血 Adult or child heart or noncardiac surgery, as the volume of blood dilution can reduce blood transfusions. As long as the mean arterial pressure (MAP) is ≥ 8kPa, the cardiac index (CI) is equal to or greater than 2.2L · min -1 min -2 and the SvO 2 of the mixed venous blood is equal to or greater than 60 %, Oxygen delivery (DO_2) is sufficient. Under clinical monitoring conditions, the authors studied the physiologic characteristics of a large number of isovolemic hemodilution and examined hemoglobin (Hb), acid-base status, cardiac and circulatory function, and compared with SvO_2 to observe a large amount of blood