HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

Lack of correlation between the grade of methacholine-induced bronchial hyperreactivity and ipratropium bronchodilation in asthmatics.

Abstract
In 46 never-smoking randomly chosen patients with non-allergic asthma, 40 to 60 years old, a methacholine hyperreactivity test and lung function tests were performed after inhalation of different doses of ipratropium bromide (IB). The grade of hyperreactivity was measured as the cumulative dose of methacholine necessary to produce a decrease in the forced expiratory volume in one second of 20% of the lowest post-NaCl value (PD20). The following lung function tests were carried out: Lung volumes, ventilatory capacity including flow-volume curves, airway resistance and nitrogen single-breath wash-out test. The bronchodilator effect, measured as a change in the different lung function tests for different doses of IB given (0.08 mg, 0.15 mg and 0.25 mg), was correlated to the grade of hyperreactivity (PD20 dose). No or only a slight correlation was found between the grade of methacholine-induced hyperreactivity and the bronchodilator effects of the different doses of IB. These results indicate a lack of correlation between an anticholinergic bronchodilator effect and the grade of methacholine-induced bronchial hyperreactivity, or possibly an insensitivity of the above-mentioned methacholine test.
AuthorsH Hedenström, T Wegener
JournalUpsala journal of medical sciences (Ups J Med Sci) Vol. 93 Issue 1 Pg. 71-80 ( 1988) ISSN: 0300-9734 [Print] Sweden
PMID2967576 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Atropine Derivatives
  • Bronchodilator Agents
  • Methacholine Compounds
  • Methacholine Chloride
  • Ipratropium
Topics
  • Adult
  • Asthma (diagnosis, drug therapy, physiopathology)
  • Atropine Derivatives (therapeutic use)
  • Bronchi (drug effects, physiopathology)
  • Bronchodilator Agents (administration & dosage, therapeutic use)
  • Dose-Response Relationship, Drug
  • Female
  • Humans
  • Ipratropium (administration & dosage, therapeutic use)
  • Male
  • Methacholine Chloride
  • Methacholine Compounds (administration & dosage)
  • Middle Aged
  • Respiratory Function Tests

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: