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月经时出血是宫内膜受性激素的影响,发生周期性增生、分泌和剥脱,月经时子宫内膜血栓形成和纤溶现象,血管收缩和前列腺素(PG)之间的关系是复杂的。月经时宫内膜出血后在10秒钟内有血小板血栓形成,随之纤维素在30秒内对血栓周围包绕,并使之逐渐增大,24小时内血管内腔闭塞,形成纤维蛋白血栓。此种功能缺乏时,可发生月经过多。子宫内膜的止血和其他组织的止血机理有许多不同,子宫内膜血栓形成只限在血管内,而血管外几乎没有纤维蛋白形成。这种生理现象与子宫有较强的纤溶活性有关,子宫内膜反复剥脱出血,再
Menstrual bleeding is endometrial sex hormones, the occurrence of periodic hyperplasia, excretion and exfoliation, endometrial menstrual thrombosis and fibrinolysis, vasoconstriction and prostaglandin (PG) is a complex relationship between. Menstrual endometrial bleeding within 10 seconds after platelet thrombosis, followed by cellulose in 30 seconds around the thrombus and make it gradually increased, within 24 hours of vascular lumen occlusion, the formation of fibrin thrombus . Such lack of function can occur when menorrhagia. Endometrial hemostasis and other organizations have many different hemostatic mechanism, endometrial thrombosis only in the blood vessels, and almost no extravascular fibrin formation. This physiological phenomenon and the uterus has strong fibrinolytic activity, repeated exfoliation of the endometrium, and then