title: Bolus tocolysis: treatment of preterm labor with pulsatile administration of a beta-adrenergic agonist.
abstract: The treatment of premature labor with beta-adrenergic substances is complicated by side effects. Although most human control mechanisms are pulsatile, therapy is usually administered continuously. We designed a microprocessor-controlled pump to allow pulsatile tocolytic infusion, hoping to reduce the total dose and thus the side effects. In 33 patients pulsatile bolus tocolysis was compared with continuous tocolysis in a control group of 38 patients. Bolus tocolysis required considerably less beta-sympathomimetic agent for comparable therapeutic success (median dosage 3.0 versus 15.9 mg, p less than 0.001). Duration of therapy under bolus tocolysis was also significantly shorter (p less than 0.05). Birth weight was higher after bolus tocolysis (median 3070 versus 2580 gm, p = 0.05). Additional indicators favored bolus tocolysis but were not statistically significant: a longer gestational period, fewer infants weighing less than 2500 gm, and a lower incidence of respiratory distress syndrome. Pulmonary edema occurred in one patient during continuous tocolysis.
authors.affiliation: Department of Obstetrics and Gynecology, University of Bochum, Federal Republic of Germany.
authors.forename: L
authors.initials: L
authors.lastname: Spätling
authors.forename: F
authors.initials: F
authors.lastname: Fallenstein
authors.forename: H
authors.initials: H
authors.lastname: Schneider
authors.forename: J
authors.initials: J
authors.lastname: Dancis
mesh_terms: D000318:Adrenergic beta-Agonists / Q000008:administration & dosage* / Q000627:therapeutic use; D005260:Female; D005280:Fenoterol / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D007260:Infusion Pumps; D007262:Infusions, Intravenous; D007752:Obstetric Labor, Premature / Q000188:drug therapy*; D011247:Pregnancy; D011256:Pregnancy Outcome; D015145:Tocolysis
chemical_list: D000318:Adrenergic beta-Agonists; D005280:Fenoterol