[The use of a double balloon catheter in the topical extra-amniotic administration of prostaglandin F2alpha gel in indicated labor induction and cervix incompetence].

Using a self-made double-balloon-catheter the instillation of 2.5 mg Prostaglandin F2 alpha into the extraovular chorio-decidual space was down 46 times in 42 late pregnant women. The indication was the unripe cervix uteri in case of urgent parturition. This method is more effective than the pericervical and endocervical application, respectively. Under continuous supervision using external CTG there were neither complications in fetus nor in the mother.