There is some evidence that methylxanthines (caffeine and theophylline) are effective in the short-term for reducing apnoea in premature babies.
Apnoea is a pause in breathing of greater than 20 seconds. It may occur repeatedly in preterm babies (born before 34 weeks gestation). Methylxanthines (such as theophylline and caffeine) are drugs that are believed to stimulate breathing efforts and have been used to reduce apnoea. Adverse effects of feeding intolerance and a rapid heart rate have been found with theophylline. The review of trials found that methylxanthines help reduce the number of apnoea attacks in the short term. The one new trial included in this review that published longer term outcomes (up to term equivalent age and in later infancy) demonstrated that caffeine therapy has lower rates of longer term side effects.
Methylxanthine is effective in reducing the number of apnoeic attacks and the use of mechanical ventilation in the two to seven days after starting treatment. Caffeine is also associated with better longer term outcomes. In view of its lower toxicity, caffeine would be the preferred drug for the treatment of apnoea.
Recurrent apnoea is common in preterm infants, particularly at very early gestational ages. These episodes of ineffective breathing can lead to hypoxaemia and bradycardia that may be severe enough to require the use of positive pressure ventilation. Methylxanthines (such as caffeine, theophylline or aminophylline) have been used to stimulate breathing and reduce apnoea and its consequences.
To determine the effects of methylxanthine treatment on the incidence of apnoea and the use of intermittent positive pressure ventilation (IPPV) and other clinically important outcomes in preterm infants with recurrent apnoea.
Searches were made of the Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 2, 2010), the Oxford Database of Perinatal Trials, MEDLINE (1966 to June 2010), EMBASE (1982 to June 2010), previous reviews including cross references, abstracts, conferences and symposia proceedings, expert informants, journal hand searching mainly in the English language.
All trials utilizing random or quasi-random patient allocation in which methylxanthine (theophylline, caffeine or aminophylline) as treatment for apnoea was compared with placebo or no treatment for apnoea in preterm infants were included.
Methodological quality was assessed independently by the review authors. Data were extracted independently by the review authors. Analysis was done in accordance with the recommendations of the Cochrane Neonatal Review Group.
Six trials reported on the effect of methylxanthine in the treatment of apnoea (three trials of theophylline and three trials of caffeine). Five trials that enrolled a total of 192 preterm infants with apnoea evaluated short term outcomes; in these studies, methylxanthine therapy led to a reduction in apnoea and use of IPPV in the first two to seven days. The post-hoc analysis of the large CAP Trial comparing caffeine to control in a subgroup of infants being treated for apnoea reported significantly reduced rates of PDA ligation; postmenstrual age at last oxygen treatment, last endotracheal tube use, last positive pressure ventilation; and reduced chronic lung disease at 36 weeks.