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Published on: November 4, 2010
[Pulmonary volume and flows in asthmatic children in therapy with prompt and delayed-action theophylline: preliminary
Insights
Plain theophylline showed better results than sustained-release (SR) theophylline in improving lung function in asthmatic children. Further studies are needed to confirm SR theophylline
Area of Science:
- Pediatric Pulmonology
- Pharmacology
- Respiratory Medicine
Context:
- Asthma management in children requires effective long-term therapies.
- Theophylline is a bronchodilator used for asthma prophylaxis.
- Sustained-release (SR) theophylline formulations aim for improved compliance and efficacy.
Purpose:
- To compare the efficacy of plain theophylline versus SR theophylline in pediatric asthma.
- To evaluate the impact of these theophylline formulations on pulmonary function tests.
- To assess bronchodilator response after Albuterol inhalation.
Summary:
- A study involving 12 asthmatic children compared plain theophylline, SR theophylline, and no therapy.
- Pulmonary function (statics, dynamics, and flow-volume curves) was assessed using body plethysmography before and after Albuterol inhalation.
- Plain theophylline demonstrated superior effects on static lung volumes (TV, RV, FRC) and dynamic parameters (MMEF, V 0.50 TV) compared to SR theophylline.
Impact:
- Findings suggest plain theophylline may be more effective than current SR formulations for children's asthma.
- Highlights the need for further pharmacokinetic, clinical, and spirometric research.
- Informs potential therapeutic strategies for long-term asthma control in pediatric populations.
Abstract:
12 asthmatic children, suffering from frequent asthma (Ekwo-Weiberger classification), were studied; 3 groups were selected: A group: without therapy. B group: treated with plain theophylline. C group: treated with SR theophylline. Adequate serum theophylline levels were obtained in B and C group. Every child underwent then body plethysmography (Fenyves and Gutt's Pulmostar apparatus) before and after inhaling Albuterol through IPPB apparatus. We matched the different performances provided by the subjects of the various groups and compared them with the ones of a D group of healty subjects (pollinosics out of the exposure season). The indexes of pulmonary statics, and particularly TV and RV (as well as FRC) point out a better effect of plain theophylline vs. SR theophylline. Similar impression was done examining the conductances and the volume/flow curve, referring particularly to MMEF and V 0.50 TV. Further pharmacokinetic, clinical and spirometric studies are therefore necessary to confirm that the use of SR theophylline nowadays available in Italy is as successful as plain theophylline in long-term prophylaxis of children asthma.
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