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Related Experiment Videos

Maximum achievable bronchodilatation in asthma.

J Chaieb1, N Belcher, P J Rees

  • 1United Medical School of Guy's, London, U.K.

Respiratory Medicine
|November 1, 1989
PubMed
Summary
This summary is machine-generated.

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For poorly reversible asthma, increasing doses of inhaled salbutamol (a beta-agonist) often maximizes bronchodilation. Ipratropium bromide may provide additional benefit in some patients unresponsive to maximal beta-agonist therapy.

Area of Science:

  • Pulmonology
  • Pharmacology

Background:

  • Poorly reversible asthma requires effective bronchodilator strategies.
  • Assessing combination therapy is crucial for optimizing lung function.

Purpose of the Study:

  • To evaluate the efficacy of combining three bronchodilator drugs in patients with poorly reversible asthma.
  • To determine the optimal sequence of bronchodilator administration for maximal effect.

Main Methods:

  • 37 patients with poorly reversible asthma (FEV1 < 90% predicted) received combinations of salbutamol, ipratropium bromide, and aminophylline.
  • Drug administration sequences varied, with FEV1 monitored after each agent.

Main Results:

  • Salbutamol increased FEV1 by at least 200 ml in 18/19 patients when given first.

Related Experiment Videos

  • Subsequent administration of ipratropium bromide or aminophylline yielded limited additional bronchodilation.
  • Salbutamol as the third drug resulted in a 200 ml FEV1 increase in 11/18 patients.

    • Conclusions:

    • Maximal bronchodilation in poorly reversible asthma is often achieved with escalating doses of beta-agonists (salbutamol).
    • Ipratropium bromide may offer further improvement in select patients.
    • Aminophylline showed minimal additional benefit in this study context.