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本文测定72例出生6日内,健康新生儿的右室收缩时间间期(RSTI),其中22例出生24小时内的新生儿并进行了吸高浓度氧(5L/min)前后的对比。吸氧前后及不同日龄间三组RSTI各参数的比较,都有显著或非常显著的差异,主要表现为RPEP缩短、RVET延长、RPEP/RVET及RICT/RVET比值减小,反映右室后负荷下降。RPEP/RVET、RICT/RVET比值与新生儿日龄的关系,经双曲线回归分析,呈负相关,P<0.01,二者曲线都于24小时内下降最迅速,其次为2～4日,符合健康新生儿生理性肺高压下降的规律,因而上述比值可以作为研究肺血管病的参考,用以系统观察,自我对比,有利于某些心脏病手术时机的选择及术后随访。
In this paper, 72 patients with healthy newborns within 6 days after birth were measured for right ventricular systolic time (RSTI). Twenty-two neonates within 24 hours of birth were compared before and after high-concentration oxygen (5L / min). There were significant or very significant differences in the RSTI parameters between the three groups before and after oxygen inhalation and different days of age. The main shortages were RPEP shortening, RVET prolongation, the decrease of RPEP / RVET and RICT / RVET ratio, decline. The relationship between RPEP / RVET, RICT / RVET and neonatal days was negatively correlated by hyperbolic regression analysis (P <0.01). Both curves dropped most rapidly in 24 hours, followed by 2-4 days Physiological pulmonary hypertension healthy newborn decline, so the ratio can be used as a reference for the study of pulmonary vascular disease, for systematic observation, self-comparison, is conducive to the selection of the timing of certain cardiac surgery and follow-up.