[Use of beta mimetics in cerclage operations].

This paper deals with the change of rheobase in connection with the cerclage of cervix uteri. For this reason special attention is paid to the starting value of rheobase before operation and its reaction after cerclage using comparable parameters like pelvic score, gestational age at the beginning of lying-in treatment and date of cerclage. Based on our results we have to state that a cerclage is justified only in genuine insufficiency of cervix uteri provided there are no contractions, and the rheobase at the starting point is above of a defined level.