Shafik A
Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Egypt.
Gynecol Obstet Invest. 1997;44(4):265-9. doi: 10.1159/000291541.
To study the effect of vaginal distension on the uterus, the uterine pressure was measured in 20 healthy female volunteers (mean age 34.3 +/- 7.8 years; 7 nulli-, 13 multiparous) by means of a manometric tube perfused by a pneumohydraulic system. Vaginal distension was induced by a 12 F condom-ended catheter. The condom was inflated in increments of 10 ml of air. The test was repeated after anesthetizing the vagina and uterus, respectively. The uterine pressure increased upon vaginal distension; it showed more rise as the distension increased (p < 0.01). The response was momentary and the pressure returned to basal values although vaginal distension continued. It disappeared upon sustained or successive inflations of 5-7 times and was restored after a resting period of 3-5 min. There was no uterine pressure response when the vagina or uterus were anesthetized and it returned when the anesthetic effect had worn off. No significant difference was found in the pressure response between nulli- and multiparous women (p > 0.05). The aforementioned results were reproducible when repeated in the same woman with no significant difference (p > 0.05). The inflated condom looks like the erect penis, and the uterine response to the inflated condom seems to simulate that of the erect penis distending the vagina during coitus. The constant rise of uterine pressure to vaginal distension postulates a reflex relation which we call 'vagino-uterine' reflex. Uterine contractions during coitus are suggested to have a 'suction-pumping' action on the semen deposited in the vaginal fornices.
为研究阴道扩张对子宫的影响，通过由气动液压系统灌注的测压管，对20名健康女性志愿者（平均年龄34.3±7.8岁；7名未生育，13名经产妇）测量子宫压力。采用12F避孕套头端导管诱导阴道扩张。避孕套以10ml空气增量充气。分别在麻醉阴道和子宫后重复该试验。阴道扩张时子宫压力升高；随着扩张增加压力升高更明显（p<0.01）。反应是瞬间的，尽管阴道扩张持续，但压力恢复到基础值。在持续或连续充气5 - 7次后反应消失，并在3 - 5分钟的休息期后恢复。阴道或子宫麻醉时无子宫压力反应，麻醉效果消退后反应恢复。未生育和经产妇之间的压力反应未发现显著差异（p>0.05）。在同一名女性中重复上述结果时具有可重复性，无显著差异（p>0.05）。充气的避孕套看起来像勃起的阴茎，子宫对充气避孕套的反应似乎模拟了性交时勃起阴茎扩张阴道的反应。子宫压力对阴道扩张的持续升高表明存在一种我们称为“阴道 - 子宫”反射的反射关系。性交期间子宫收缩被认为对沉积在阴道穹窿的精液有“抽吸 - 泵吸”作用。
