【摘要】 目的　测量胎儿心脏Tei指数,建立不同孕周组胎儿心脏Tei指数正常参考值范围,评估Tei指数在临床应用中的价值。方法　超声检查16~40孕周正常胎儿299例,测得胎儿心脏Tei指数291 例。结果299 例正常胎儿Tei指数的检测成功率为97.3%;3个不同孕周组胎儿之间Tei 指数无统计学差异(P>0.05);Tei 指数95%正常参考值范围为0.445±0.101。结论　胎儿心脏Tei指数测量方法简便;Tei指数在16~40 周正常胎儿中稳定性好;95%正常参考值范围为0.445±0.101。更多还原

【Abstract】 Objective To investigate value of Tei index in assessment of aspects of fetal cardiac function for establishing the reference ranges of Tei index in normal fetuses at vary gestation ages. Methods A total of 299 normal fetuses whose gestation weeks varying from 16 to 40, were scanned by color Doppler ultrasonographic unit of Sequoia 512. The Doppler flow waveforms of the left ventricular (LV) outflow and inflow tracts in every fetus were imaged. The LV isovolumic contraction time (ICT), isovolumic relaxation time (IRT) and ejection time (ET) were measured and the Tei index calculated by the formula Tei=(ICT+IRT)/ET. Results The ICT, IRT and ET were obtained in 291 of 299 normal fetuses. The index in three groups of normal fetuses (gestation age vary from 16 to 24, 24 +1 to 32, 32 +1 to 40) were 0.436 ±0.064, 0.444± 0.056 , 0.449±0.048 respectively, and there was no significant difference of Tei index between each group. The Tei index appeared to be independent on gestation age or heart rate ( P >0.05). Conclusion The Tei index can be easily obtained in the fetus even without precise anatomic imaging. The Tei index may be a convenient and reliable tool to measure fetal myocardial function.更多还原