超声心动图血流参数预测早产儿动脉导管早期自然关闭的价值

目的：探讨超声血流参数预测早产儿动脉导管早期是否自然关闭的价值。方法对2013年10月至2014年12月在重庆市妇幼保健院住院且生后24 h 内进行超声心动图检查有动脉导管未闭（PDA）的早产儿130例进行前瞻性研究，分别于72 h 及7 d 对早产儿行超声心动图检查，7 d 内动脉导管未自然关闭者为动脉导管早期未自然关闭组（PDA 组）；自然关闭者为动脉导管早期自然关闭组（对照组），对两组患者进行组间比较。首次超声检查（24 h 内）测量收缩期降主动脉与肺动脉的压差、肺动脉收缩压及卵圆孔分流速度。结果（1）PDA 组与对照组比较：①降主动脉与肺动脉的压差低于对照组（P＜0．001）；②肺动脉收缩压高于对照组（P＜0．001）；③卵圆孔分流速低于对照组（P＜0．05）；（2）利用降主动脉与肺动脉的压差、肺动脉收缩压、卵圆孔分流速预测早产儿动脉导管早期自然关闭的最佳临界点值分别为：19．69 mm Hg 、33．76 mm Hg 及57．16 cm／s 。结论超声血流参数对预测早产儿动脉导管早期能否自然关闭具有重要意义。

The value of echocardiography flow parameters in predicting spontaneous closure of patent ductus arteriosus in preterm infants

Objective To investigate the value of echocardiography flow parameters in predicting spontaneous closure of pa-tent ductus arteriosus(PDA) in preterm infants .Methods We conducted prospective study on 130 preterm infants who born in Chongqing Health Center for Women and Children from October 2013 to December 2014 .They were accepted echocardiographic ex-aminations at 72 h and 7 d .They were be divided into two groups according to whether spontaneous closure of ductus arteriosus happen with in 7 days after birth (the control group) or not (the PDA group) .The echocardiographic flow parameters were com-pared between the two groups .we measured the pulmonary artery pressure ,The differential pressure descending aorta and pulmona-ry artery and patent foramen shunt rate for the first examination which should must be finished 24 h after birth .Results (1) PDA group compared with control group :① the differential pressure descending aorta and pulmonary artery in PDA group were lower than the control group(P< 0 .001) ;② the pulmonary artery in PDA group were higher than the control group(P < 0 .001) ;③ the patent foramen shunt rate in PDA group were lower than the control group(P< 0 .05) ;(2)The best critical points of the differential pressure descending aorta and pulmonary artery ,the patent foramen shunt rate ,and the pulmonary artery to predict whether ductus arteriosus could be spontaneous closed in preterm infants were 19 .69 mm Hg ,33 .76 mm Hg and 57 .16 cm/s .Conclusion The echocardiographic flow parameters has great significantly in predicting whether ductus arteriosus could be spontaneous closed early in preterm infants .