1. A method is described for studying pelvic blood flow in women by the indirect method of measuring vaginal temperature changes in response to a posture change. Ten women with chronic pelvic pain and venous congestion and 10 normal subjects were observed during posture changes over a 2 h period.
2. Vaginal temperature minus axillary temperature rose after subjects changed from the supine to the seated position, indicating a fall in the rate of pelvic blood flow.
3. A significantly greater variance in the rate of change in vaginal temperature minus axillary temperature was found in patients with pelvic venous congestion compared with control subjects (P> 0.005).
4. The findings are consistent with a disorder of blood flow regulation in women with pelvic pain owing to congestion.