Blood flow through the myometrium and the endometrium in standing and supine women measured by intrauterine xenon application

The myometrial blood flow (MBF) and the endometrial blood flow (EBF) were studied in 23 unanesthetized women by measuring the xenon-133 clearance after intraluminal instillation or intramyometrial injection. In 6 women, the mean MBF was 18.8 ml. per 100 Gm. of tissue per minute, and EBF was 17.8 ml. per 100 Gm. per minute, the two flows being correlated (r = 0.90, p < 0.05). By repeated estimations in 5 women, MBF was 22.5 ml. per 100 Gm. per minute. The standard deviation between the values from the same individuals was 13 per cent of the mean value. In 12 women changing from horizontal to vertical position, the blood flow decreased 44 per cent taken as a mean, the maximum decrease being 81 per cent. The two flows were correlated (r = 0.68, p < 0.05).