孕早期三个胎儿血管搏动指数测量的观察者内变异性。
Intraobserver variability of pulsatility index measurements in three fetal vessels in the first trimester.
作者信息
Alcázar J L
机构信息
Department of Obstetrics and Gynecology, Clínica Universitaria de Navarra, Pamplona, Spain.
出版信息
J Clin Ultrasound. 1997 Sep;25(7):366-71. doi: 10.1002/(sici)1097-0096(199709)25:7<366::aid-jcu3>3.0.co;2-8.
PURPOSE
The intraobserver repeatability of pulsatility index measurements in 3 fetal vessels in the early weeks of gestation was evaluated.
METHODS
The pulsatility index was calculated from the flow velocity waveforms from 3 fetal vessels in a series of 58 uneventful, low-risk, singleton first-trimester pregnancies using transvaginal color Doppler sonography. The intraobserver repeatability was expressed as the intraclass correlation coefficient. Mean menstrual age at the time of the examination was 10.3 weeks (range, 7.6-13).
RESULTS
Flow velocity waveforms from the umbilical artery, abdominal aorta, and middle cerebral artery were obtained in 100% (58/58), 98.3% (57/58), and 100% (34/34) of cases, respectively. The intraclass correlation coefficients for these vessels were 0.89, 0.79, and 0.93, respectively.
CONCLUSIONS
The intraobserver repeatability was acceptable for all the vessels studied.
目的
评估妊娠早期3条胎儿血管搏动指数测量的观察者内重复性。
方法
采用经阴道彩色多普勒超声，对58例妊娠早期单胎、无并发症、低风险的孕妇，从3条胎儿血管的血流速度波形计算搏动指数。观察者内重复性以组内相关系数表示。检查时的平均月经龄为10.3周（范围7.6 - 13周）。
结果
分别在100%（58/58）、98.3%（57/58）和100%（34/34）的病例中获得了脐动脉、腹主动脉和大脑中动脉的血流速度波形。这些血管的组内相关系数分别为0.89、0.79和0.93。
结论
所有研究血管的观察者内重复性均可接受。
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