改良超滤体外循环对婴幼儿心内直视手术术后心肺功能的影响

目的：探讨改良超滤（MUF）对婴幼儿心内直视手术术后心肺功能的影响。方法：将40例行体外循环（CPB）下心内直视手术的婴幼儿随机分为MUF组（n=20）和无超滤对照组（简称对照组，n=20），动态观察CPB前、CPB停机以及MUF结束时（对照组在CPB停机20min时）的血氧分压（PO，）及二氧化碳分压（PCO2）、术后呼吸机辅助呼吸时间、正性肌力药用量以及使用时间、左心室射血分数（LVEF）等心肺功能指标。结果：40例患儿无一例死亡。两组的PO2在CPB停机时与CPB停机前相比均明显下降，但MUF组在MUF结束时明显回升，接近CPB前水平，而对照组仅轻度回升，但仍明显低于CPB前；CPB停机20min时MUF组P02高于对照组。CPB停机后两组PC02轻度升高，MUF后PCO2轻度下降，但组内、组间比较差异无统计学意义。术后MUF组呼吸机辅助时间、正性肌力药用量以及使用时间明显低于对照组。术后1周心脏超声心动图检查提示两组LVEF均较术前明显提高，但组间比较差异无统计学意义。结论：MUF有利于改善婴幼儿心内直视手术术后早期的心、肺功能。

Influence of modified ultrafiltration on infant's cardiopulmonary function after open heart surgery

Objective: To investigate the influence of modified ultrafiltration(MUF) on infant's cardiopulmonary function after open heart surgery with cardiopulmonary bypass(CPB).Methods: 40 infants with congenital heart diseases were randomly divided into the MUF group(n=20) and the control group(n=20).Arterial blood was measured to investigate PO2 and PCO2 before CPB at the end of CPB,at the end of MUF(or 20 minutes after CPB in control group).Besides,the doses of dopamine and LVEF before and after surgery were also...