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Nasal CPAP improves PEFR in nocturnal asthma

Nasal CPAP improves PEFR in nocturnal asthma
Patients with nocturnal asthma studied before (blue columns), during (red columns), and after (green columns) nasal continuous positive airway pressure. Nasal CPAP led to a statistically significant increase in peak expiratory flow rate (PEFR) in the morning and evening, and before and after bronchodilators.
Redrawn from Chan CS, Woolcock AJ, Sullivan CE, Am Rev Respir Dis 1988; 137:1502.
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