UNLABELLED:A Methodical Study:

AIM OF THE STUDY:To analyse the feasibility of colour and spectral Doppler assessment of blood flow in the fetal right (RPA) and left (LPA) main pulmonary arteries in relation to fetal position and to gestational age.

STUDY DESIGN:The fetal position was a priori divided into 3 types, depending on whether the fetal heart was visualised apically (Type 1), from the right side (Type 2) or from the left side (Type 3). Three groups A (19-25 weeks gestation), B (26-32) and C (33-39) including 33 consecutive pregnancies each, were examined to document the fetal position as well as the rate of the successful Doppler examinations of the RPA and/or LPA.

RESULTS:The fetal position Type 2 was most common throughout gestation (in group A = 42%, B = 36%, C = 51%) followed by the type 3 and then type 1. The rate of successful Doppler records from the RPA and LPA depended on the fetal position: In Type 2 RPA in 98%; in Type 3, LPA in 100%; but the apical approach was not effective (< 40%). Depending on gestational age, the success rates for a Doppler examination of at least one vessel were high (> 85%), whereas successful examination of both vessels was unlikely (12%).

CONCLUSIONS:In the second half of pregnancy, independent of fetal position, Doppler examination of at least one pulmonary artery is successful in most cases, whereas the assessment of both vessels is rather difficult.

译文

UNLABELLED :一项系统研究:

研究目标:分析彩色和光谱多普勒评估胎儿血流(RPA)的可行性)和左(LPA)主要肺动脉与胎儿位置和胎龄有关。

研究设计:胎儿位置是先验的,分为3种类型,具体取决于是否从右侧(2型)或左侧(3型)顶端可见胎儿心脏(类型1)。对三组A(妊娠19-25周),B(26-32)和C(33-39)组进行了检查,每个组连续33次怀孕,以记录胎儿的位置以及RPA的多普勒检查成功率和/或LPA。

结果:在整个妊娠期间,胎儿位置2型最为常见(A组为42%,B = 36%,C = 51%),其次是分别是3型和1型。RPA和LPA的多普勒记录成功率取决于胎儿的位置:在2型RPA中为98%。在类型3中,LPA为100%;但根尖手术方法无效(<40%)。根据胎龄,至少对一根血管进行多普勒检查的成功率较高(> 85%),而对两根血管进行多普勒检查的成功率均不高(12%)。

结论 strong>:在怀孕的后半段,不管胎儿的身高如何,大多数情况下多普勒检查至少一条肺动脉是成功的,而两条血管的评估却相当困难。

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