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Pharyngeal pressure in preterm infants receiving nasal continuous positive airway pressure
  1. A G De Paoli1,
  2. R Lau1,
  3. P G Davis1,2,
  4. C J Morley1,2
  1. 1Department of Paediatrics, Royal Women’s Hospital, 132 Grattan Street, Carlton, Victoria 3053, Australia
  2. 2Murdoch Children’s Research Institute, Flemington Road, Parkville, Victoria 3052, Australia
  1. Correspondence to:
    Dr De Paoli
    Special Care Baby Unit, Women’s Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, UK;


Pharyngeal pressures in 11 preterm infants, receiving binasal Hudson prong continuous positive airway pressure (CPAP) pressurised by bubbling bottles, were measured. The mean (95% confidence interval) pressure drop from the prongs to the pharynx was 3.2 (2.6 to 3.7) cm H2O with mouths open and 2.2 (1.6 to 2.8) cm H2O with mouths closed. Mouth closure augments CPAP transmission.

  • 95% CI, 95% confidence interval
  • CPAP, continuous positive airway pressure
  • Fio2, fractional inspired oxygen
  • FG, French gauge
  • IQR, interquartile range
  • NICU, neonatal intensive care unit
  • RDS, respiratory distress syndrome
  • continuous distending pressure
  • pharyngeal manometry
  • continuous positive airway pressure (CPAP)
  • premature infant

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  • AGDeP was supported by the Royal Women’s Hospital Foundation and the Division of Research and Education, Royal Women’s Hospital, Melbourne. PGD was supported by an NHMRC Practitioner Fellowship, Murdoch Children’s Research Institute.

  • Competing interests: none declared