Uterine contractility and placental histology in abortion by laminaria and metreurynter.

Abstract:

:Abortions by cervical dilatation with laminaria tents followed by placement of a metreurynter into the lower uterine cavity to provide a mechanical stretch (the method most often used in midterm abortions in Japan) was performed in 7 normal Japanese and American women, 19-24 weeks pregnant, to determine similarities of this process to normal term delivery. Clinical details of each case, as presented in tables, revealed intraamniotic pressure of usually less than 50 mmHg., at a frequency of 2-5 per 10 minutes with a resulting uterine activity of 100-200 Montivideo units which compares closely to contractions during normal delivery. The fetus in each case was normal. Compared to the hypertonic saline-induced abortion, this technique caused less superficial damage to the placenta and no significant ill effects to the patients were noted. It was found that laminaria dilatation alone was sufficient to induce labor without the use of the metreurynter or resorting to oxytocics. While the authors conclude with the caution that neurogenic factors cannot be ruled out, it appears that the myogenic nature of the uterus seems to be significant in abortions caused by mechanical uterine stimulation.

journal_name

Obstet Gynecol

authors

Manabe Y,Nakajima A,Griggs JF

subject

Has Abstract

pub_date

1973-05-01 00:00:00

pages

753-9

issue

5

eissn

0029-7844

issn

1873-233X

journal_volume

41

pub_type

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