[Inhalation analgesia with methoxyfluran (penthrane) in obstetrics (author's transl)].

In 105 normal spontaneous deliveries the effect of inhalation analgesia with Methoxyfluran (Penthrane) was studied. Penthrane was administered intermittently with the Penthrane oxilator (Rod inhalator of Abbott). The initial concentration was 0.25 volume%. The maximal concentration was 0.35 volume% of Penthrane. Fetal monitoring records were obtained in all deliveries. In 49 cases (46.7%) intra- and post-partum microblood studies were obtained. In 85 women (81.0%) the result of the analgesia was good. Nausea occurred in 21 women (20%). There were no abnormal fetal monitoring patterns. The Apgar scores of the newborns were between 8 and 10. The actual pH's were between 7.24 and 7.41. The third stage of labour was normal in all cases.