Abstract
Nine preterm infants with hyaline membrane disease were studied using a ventilator triggered from abdominal movement. It was possible to alter respiratory rate over a short space of time by adjustments of the inspiratory time setting. There was a marked inverse relationship between inspiratory time and both ventilator and baby's respiratory rate-mean baby respiratory rate was 62 breaths/min at an inspiratory time of 0.2 s and 45 breaths/min at 0.8 s. This drop was statistically significant (P<0.005). Mean tidal volume changed little over this range. This interaction meant that mean minute ventilation was optimal at inspiratory times of 0.2 to 0.4 s, being 269 and 258 ml/kg per minute, respectively, but at 0.8 s fell to 213 ml/kg per minute (P<0.05).
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References
Clifford RD, Whincup G, Thomas R (1988) Patient-triggered ventilation prevents pneumothorax in premature babies. Lancet I:529–530
Field D, Milner AD, Hopkin IE (1985) Inspiratory time and tidal volume during intermittent positive pressure ventilation. Arch Dis Child 60:259–261
Field D, Milner AD, Hopkin IE (1985) Manipulation of ventilator settings to reduce active expiration against positive pressure inflation. Arch Dis Child 60:1036–1040
Greenough A, Greenall F (1988) Patient triggered ventilation in premature neonates. Arch Dis Child 63:77–78
Greenough A, Pool J (1988) Neonatal patient triggered ventilation. Arch Dis Child 63:394–397
Greenough A, Morley C, Davis J (1983) Interaction of spontaneous respiration with artificial ventilation in preterm babies. J Pediatr 103:769–773
Mehta A (1988) Patient triggered ventilation in premature neonates. Arch Dis Child 63:1112
Mehta A, Callan K, Wright BM, Stacey TE (1986) Patient-triggered ventilation in the newborn. Lancet II:17–19
South M, Morley CJ (1986) Synchronous mechanical ventilation of the neonate. Arch Dis Child 61:1190–1195
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Upton, C.J., Milner, A.D. & Stokes, G.M. The effect of changes in inspiratory time on neonatal triggered ventilation. Eur J Pediatr 149, 648–650 (1990). https://doi.org/10.1007/BF02034755
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DOI: https://doi.org/10.1007/BF02034755