Doppler time velocity waveform studies of the uterine artery and uterus

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Abstract
Summary. This study describes a reliable and reproducible method of obtaining Doppler frequency shift waveforms from the uterine artery based on observations in 26 non‐pregnant women. The waveforms were detected easily but direct display of the vessel was inconsistent. The values of the pulsatility index calculated from the waveforms had a mean of 3·25 (SD 0·83). The standard error of the mean was 0·16 and based on this, the 95% reference range was 1·21 to 5·29. The stage of the menstrual cycle did not affect the pulsatility index nor was there any significant difference between subjects who were nulliparous and those who had had previous pregnancies. These results show that Doppler ultrasound can be applied to the non‐pregnant uterus and the data presented may be used as a baseline for the study of uterine pathology.

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