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血液透析时体外循环血量大约２００ｍｌ左右，透析结束时需在短时间内将这些血液回输体内，由此血容量突然增加，回血速度快慢必然影响心血管功能。通过对３２例患者的临床观察，用常规１００ｍｌ／分的血流速度回血，中老年及有心血管并发症的透析患者，出现程度不等的血压和心电图的异常改变，而采用７５ｍｌ／分、５０ｍｌ／分的速度回血，异常改变明显减少。所以适宜的回血速度有助于减少透析患者心血管并发症的发生。
Cardiopulmonary bypass when hemodialysis blood about 200ml, dialysis at the end of the need to be in a short time these blood back to the body, which suddenly increased blood volume, the speed of blood back to the inevitable impact of cardiovascular function. Through clinical observation of 32 patients, abnormal blood pressure and electrocardiogram (ECG) abnormalities were observed in patients returning to blood, middle-aged and elderly patients with cardiovascular complications and conventional blood flow velocity of 100ml / min, and 75ml / min and 50ml / Min speed back to the blood, significant reduction in abnormal changes. Therefore, the appropriate rate of blood back to help reduce the incidence of cardiovascular complications in patients with dialysis.