Transvaginal Ultrasound in the Assessment of Bladder Volumes in Women: Preliminary Report

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Abstract
Transvaginal linear array ultrasound is described as a method of measuring bladder volumes in the range 2 to 175 ml, overcoming the limitations of abdominal ultrasound at these smaller (though clinically important) volumes. The mean error over the range 10 to 175 ml was 23%. Statistical analysis of preliminary data obtained by this technique shows that bladder volume in ml can be calculated by the formula: Volume = 5.9 .times. (height .times. depth) - 14.6 ml (95% confidence limits = .+-. 37 ml).