[Contraction of non-gravid human uterus in various menstrual phases (author's transl)].
Using microtransducer, the author has studied the uterine contraction in various menstrual phases and during dysmenorrhea, and also the effect of the administration of PG synthetase inhibitors. The results obtained can be summarized as follows: 1) In normal non-gravid uterus, the contraction was 25.6mmHg in amplitude and 19.9/10min. in frequency in the proliferative phase, 12.4 and 28.4 in the early half of secretory phase, 28.3 and 11.5 in the latter half, and 42.3 and 12.9 during menstruation. In other words, while the contractions were the most pronounced during menstruation, no difference was found between proliferative and the latter half of secretory phase, and they were the weakest during the early half of secretory phase with the ripple like small waves. 2) During the proliferative phase, relatively regular contractions were found in various kinds of patients, - that is - , patients with normal menstrual cycles, with organic disorders but without dysmenorrhea, with functional dysmenorrhea, or with organic dysmenorrhea. 3) Compared to other menstrual phases, the contractions were weak in the early half of secretory phase. However, the patients with organic dysmenorrhea had stronger contractions than other patients. 4) In the latter half of secretory phase, the patients with organic disorders or organic dysmenorrhea showed stronger contractions than in those without the organic changes, and the contractions were approximately 55mmHg in amplitude in patients with organic change, -almost twice higher than in patients without organic change. 5) During menstruation, patients with dysmenorrhea, functional or organic, showed contractions with the average amplitude of 87mmHg, -more than twice the height found in the patients without dysmenorrhea. 6) When the amplitude was higher then 140mmHg, all the patients complained of pain. 7) In patients with dysmenorrhea, the administration of PG synthetase inhibitors, such as Indomethacin, Naproxen, etc., caused the reduction of contraction amplitude, resulting in the relief of pain.
D005260:Female; D005498:Follicular Phase; D006801:Humans; D008183:Luteal Phase; D008598:Menstruation; D008599:Menstruation Disturbances / Q000503:physiopathology; D014590:Uterine Contraction