title: [Comparing the bronchodilating effects of ipratropium bromide and theophylline].
abstract: OBJECTIVE
  To compare the bronchodilating effects of ipratropium bromide and theophylline in chronic obstructive pulmonary disease(COPD).
  
  
  METHODS
  In 26 patients, mean peak forced expiratory volume in 1 second(FEV1) were measured at the time before and 30 minute, 1, 2, 3, 4, 5, 6 hours after the drugs were administered in a double-blind, placebo-controlled crossover method.
  
  
  RESULTS
  The mean peak of FEV1, increased over baseline were 34% and 19% respectively, for ipratropium bromide and theophylline (P < 0.01), and the reaching duration were 1-2 hours and 2-3 hours, the proportion of patients attaining at least a 15% (P < 0.01) increase in the FEV1, responders were 19% and 50% (P < 0.01) respectively, for ipratropium bromide and theophylline. The average FEV1, increased during the 6-hours observation period were 18% for ipratropium bromide and 8% for theophylline (P < 0.01). The mean duration of FEV1 > 15% was 3.6 and 1.6 hours respectively.
  
  
  CONCLUSIONS
  Ipratropium bromide nebulized is a more potent bronchodilator than the oral theophylline in patients with chronic airflow obstruction.
authors.affiliation: Affiliated Hospital of Kunming Medical College, Kunming 650032.
authors.forename: L
authors.initials: L
authors.lastname: Dai
authors.forename: X
authors.initials: X
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D001980:Bronchi / Q000473:pathology; D001993:Bronchodilator Agents / Q000494:pharmacology*; D004311:Double-Blind Method; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D009241:Ipratropium / Q000494:pharmacology*; D008173:Lung Diseases, Obstructive / Q000188:drug therapy / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D013806:Theophylline / Q000494:pharmacology*
chemical_list: D001993:Bronchodilator Agents; D013806:Theophylline; D009241:Ipratropium