title: [Significance of rheobase determination in detection of threatened premature labor].
abstract: In a prospective study of 176 pregnant patients it could be proved that the rheobase measurement during the whole course of pregnancy plays a significant role in recognizing the danger of premature labour. Taking a pathological limit from a number of rheobase determinations at a level of 3,4 mA, we had a sensitivity of 81% and a specificity of 50% in forecasting a premature delivery. The rheobase levels did not correlate significantly with the pelvic score (Bishop) and no correlation was found with the number of contractions measured tocometrically, nevertheless there was a correlation with the number of painful contractions between the 26th and 32nd week of gestation. Furthermore, we were able to certify the influence of psychic factors on the rheobase levels. As a result of our tests we consider the rheobase determination as being an independent, valid method for indicating premature labour. For this reason we included this procedure in our screening programme for recognition of threatened prematurity (Kubli u. Arabin, 1984).
mesh_terms: D001143:Arousal / Q000502:physiology; D004558:Electric Stimulation; D005260:Female; D006801:Humans; D007866:Leg / Q000294:innervation; D007752:Obstetric Labor, Premature / Q000175:diagnosis* / Q000503:physiopathology; D010525:Peripheral Nerves / Q000503:physiopathology; D011247:Pregnancy; D009435:Synaptic Transmission
vernacular_title: Die Bedeutung der Rheobasebestimmung bei der Erkennung der drohenden Frühgeburt.