PEDIATRICS Vol. 98 No. 6 December 1996, pp. 1035-1043
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High-Frequency Jet Ventilation in the Early Management of Respiratory Distress Syndrome Is Associated With a Greater Risk for Adverse Outcomes

Thomas E. Wiswell MD1, Leonard J. Graziani MD1, Michael S. Kornhauser MD1, James Cullen RN1, Daniel A. Merton BS, RDMS2, Linda McKee MHS3, and Alan R. Spitzer MD1

1 The Department of pediatrics, Thomas Jefferson University Hospital, Philadelphia, PA.
2 The Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA.
3 The Department of Medicine, Thomas Jefferson University Hospital, Philadelphia, PA.

Objective. The objective of this investigation was to determine if high-frequency jet ventilation (HFJV) used early in the treatment of premature infants with respiratory distress syndrome was effective in reducing pulmonary morbidity without increasing the occurrence of adverse neurologic outcomes.

Study Design. A total of 73 premature infants who met the inclusion criteria (gestational age of less than 33 weeks, birth weight of more than 500 g, age of less than 24 hours, need for assisted ventilation with peak inspiratory pressure of more than 16 and FIO2 more than 0.30, and roentgenographic evidence of respiratory distress syndrome) were randomized to either conventional (n = 36) or to high-frequency jet (n = 37) ventilation. Our goals were to maintain the infants on the assigned ventilator for at least 7 days unless they could either be extubated or meet crossover criteria. Univariate analyses were initially used to compare the two groups. Stepwise logistic regression was subsequently used to assess whether various factors independently influenced adverse outcomes.

Results. The two groups of infants were similar in all obstetrical, perinatal, and neonatal demographic characteristics. The mean birth weight and gestational age in the conventional group were 930 g and 26.6 weeks and in the HFJV group, 961 g and 26.9 weeks. The infants were randomized at similar ages (7.1 and 7.3 hours of life, respectively). Their prerandomization ventilator settings and arterial blood gases were nearly identical. There were no differences in pulmonary outcomes (occurrence of air leaks, need for oxygen or ventilation at 36 weeks postconception), and there were no differences in the mean number of days oxygen was required, number of days ventilated, or length of hospital stay. Infants ventilated with HFJV were significantly more likely to develop cystic periventricular leukomalacia (10 vs 2, P = .022) or to have a poor outcome (grade IV hemorrhage, cystic periventricular leukomalacia, or death) (17 vs 7, P = .016). Logistic regression analysis revealed HFJV to be a significant independent predictor of both cystic periventricular leukomalacia and a poor outcome. The presence of hypocarbia was not an independently significant predictor of adverse outcomes.

Conclusions. With the HFJV treatment strategy that we used, use of the high-frequency jet ventilator in the early management of premature infants with respiratory distress syndrome resulted in significantly more adverse outcomes than in those treated with conventional mechanical ventilation.

Key Words: highfreqeuency jet ventilation • periventricular leukomalacia • intracranial hemorrhage • premature infant • respiratory distress syndrome

Submitted on May 20, 1996
Accepted on June 21, 1996




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