无应激试验中胎心减速图形的临床意义

目的 分析胎心监护无应激试验(NST)中变异减速及延长减速出现的临床意义.方法 回顾性分析产前NST中出现变异减速或延长减速孕妇200例的监护图形,比较不同类型减速图形出现的临床意义和新生儿结局.结果 NST中出现变异减速和延长减速的主要原因有脐带缠绕、羊水过少及胎儿生长受限,重度变异减速及延长减速孕妇胎儿窘迫发生率(17.7%和23.8%)及新生儿重度窒息发生率(4.8%和7.1%)较轻度变异减速(8.3%和1.0%)明显升高.结论 NST中变异减速和延长减速的出现受各种因素影响,脐带因素最常见,短暂偶发的轻度变异减速不一定提示胎儿窘迫,重度变异减速及延长减速常提示胎儿宫内状况不良,需加强监护.

The clinical significance of deceleration of rate of fetal heart in non-stress test

Objective To analyse the clinical significance of variable deceleration and extended deceleration in non-stress test. Methods Studied the clinical characteristics of variable deceleration and extended deceleration of 200 cases who underwent non-stress test from January 2005 to December 2007, and compared corresponding clinical significance and newborn prognosis. Results Variable deceleration and extended deceleration in non-stress test dued to cord entanglement, polyhydramnios and fetal growth restriction. The occurrence of fetal distress and severe asphyxia in nowbom were less in low-grade variable deceleration (8.3%, 1.0%) than those in high-grade variable deceleration (17.7%, 4.8%)and extended deceleration (23.8%, 7.1%). Condusion Variable deceleration and extended deceleration in non-stress test due to cord entanglement mostly, low-grade variable deceleration is not always clue to fetal distress and high-grade variable deceleration and extended deceleration is often clue to fetal distress.