Related Experiment Videos
Comparative effects of theophylline and caffeine on respiratory function of prematurely born infants
B Laubscher1, A Greenough, G Dimitriou
1Dept of Child Health, King's College Hospital, London, UK.
Insights
Caffeine and theophylline both improve neonatal respiratory function, but caffeine acts faster. This study compared their effects on preterm infants, finding caffeine showed earlier improvements in respiratory compliance and oxygen needs.
Area of Science:
- Neonatal Medicine
- Respiratory Physiology
- Pharmacology
Background:
- Preterm infants often experience respiratory challenges.
- Theophylline and caffeine are used to manage neonatal respiratory dysfunction.
- Understanding their relative efficacy and onset of action is crucial for clinical practice.
Purpose of the Study:
- To compare the effects of theophylline and caffeine on neonatal respiratory function.
- To assess the onset and magnitude of therapeutic effects.
- To evaluate impacts on respiratory system compliance, reflex strength, and oxygen requirements.
Main Methods:
- Randomized controlled trial involving 53 preterm infants.
- Infants received either theophylline or caffeine therapy.
- Respiratory system compliance (CRS), Hering Breuer reflex strength, and oxygen needs were measured at baseline, 24 hours, and 7 days.
Main Results:
- Caffeine group showed significant improvement in CRS and reduced oxygen needs by 24 hours; theophylline group did not show these early effects.
- Both groups demonstrated improved CRS and reduced oxygen requirements after 7 days.
- Caffeine treatment led to a significant reduction in Hering Breuer reflex strength, correlated with CRS changes.
Conclusions:
- Theophylline and caffeine exhibit similar overall effects on neonatal respiratory function.
- Caffeine appears to have an earlier onset of action compared to theophylline.
- Clinical decisions may consider caffeine for potentially faster respiratory support in preterm neonates.
Abstract:
The aim of this study was to determine the relative effects of theophylline and caffeine on neonatal respiratory function. Fifty-three preterm infants (45 infants with a median gestational age of 28 weeks, range 24-34 weeks completed the protocol) were randomized to receive either theophylline (loading dose 4 mg/kg followed by 4 mg/kg/day) or caffeine (loading dose 10 mg/kg followed by 5 mg/kg/day). Compliance of the respiratory system (CRS), strength of Hering Breuer reflex and the inspired oxygen concentration requirement were measured immediately prior to, 24 h and 7 days after commencing therapy. There was no statistically significant difference in the patient characteristics of the two groups, but only the theophylline group contained immature infants (i.e. < 26 weeks gestational age (n = 7)). At 24 h, there was a significant improvement in CRS and reduction in supplementary oxygen requirements in the caffeine group (p < 0.01), in the theophylline group no such significant effects were seen. In the study population overall, after 7 days of treatment in both the theophylline and caffeine groups there was an improvement in CRS (p < 0.05 and p < 0.01 respectively) and a reduction in the inspired oxygen concentration (p < 0.05 and p < 0.01 respectively). There was, however, a significant reduction in the strength of the Hering Breuer reflex only in the caffeine group (p < 0.05) and this was a decrease which related to the change in CRS (p < 0.05). The only statistically significant difference in the magnitude of change in CRS, reflex strength or supplementary oxygen requirements between the two groups was that the reduction in inspired oxygen requirement in the caffeine group was greater than that in the theophylline treated infants at 24 h (p < 0.05). We conclude theophylline and caffeine have similar effects on neonatal respiratory function, but our results suggest caffeine administration may be associated with an earlier onset of action.