[Detection of fibronectin for confirming the diagnosis of premature rupture of fetal membranes].

Diagnosis of premature rupture of membranes (PROM) usually leads to severe clinical consequences. Diagnostic tests for confirmation of suspected rupture of membranes are either unreliable or can adversely affect the pregnancy. Foetal fibronectin is synthesised by the foetoplacental membranes especially in the anchoring villus. Its concentration in the amniotic fluid is 5-10 times greater, than in the maternal plasma. An immunoassay has recently been developed, which detects fibronectin in vaginal secretions using monoclonal antibodies, thereby establishing the presence of amniotic fluid in the vagina. Vaginal specimens were collected from 133 pregnancies. 34 of 35 patients with clearly visible amniotic fluid in the vagina had a positive test result (97.1%), whereas the majority of the control group without any signs of ruptured membranes had negative test results (96.5%). 39 of 41 women with positive test results delivered within 48 hours (95%). A positive test result thus helps to confirm the diagnosis of PROM especially in equivocal cases or may indicate forthcoming labour.