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Original Article
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Volume 349:2099-2107 November 27, 2003 Number 22
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Inhaled Nitric Oxide in Premature Infants with the Respiratory Distress Syndrome
Michael D. Schreiber, M.D., Karen Gin-Mestan, M.D., Jeremy D. Marks, Ph.D., M.D., Dezheng Huo, M.S., Grace Lee, B.A., and Pimol Srisuparp, M.D.

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 by Martin, R. J.

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ABSTRACT

Background Inhaled nitric oxide improves gas exchange, decreases pulmonary vascular lability, and reduces pulmonary inflammation. We hypothesized that the use of inhaled nitric oxide would decrease the incidence of chronic lung disease and death in premature infants with the respiratory distress syndrome.

Methods We conducted a randomized, double-blind, placebo-controlled study of the effect of inhaled nitric oxide during the first week of life on the incidence of chronic lung disease and death in premature infants (less than 34 weeks' gestation) who were undergoing mechanical ventilation for the respiratory distress syndrome. Infants were randomly assigned to receive inhaled nitric oxide (10 ppm on day 1, followed by 5 ppm for six days) or inhaled oxygen placebo for seven days. We further randomly assigned the infants in each group to receive intermittent mandatory or high-frequency oscillatory ventilation.

Results A total of 207 premature infants were enrolled. In the group given inhaled nitric oxide, 51 infants (48.6 percent) died or had chronic lung disease, as compared with 65 infants (63.7 percent) in the placebo group (relative risk, 0.76; 95 percent confidence interval, 0.60 to 0.97; P=0.03). There was no significant difference between the nitric oxide and placebo groups in the overall incidence of intraventricular hemorrhage and periventricular leukomalacia (33.3 percent and 38.2 percent, respectively), but the group given inhaled nitric oxide had a lower incidence of severe intraventricular hemorrhage and periventricular leukomalacia (12.4 percent vs. 23.5 percent; relative risk, 0.53; 95 percent confidence interval, 0.28 to 0.98; P=0.04). The type of ventilation had no significant effect on the outcome.

Conclusions The use of inhaled nitric oxide in premature infants with the respiratory distress syndrome decreases the incidence of chronic lung disease and death.


Source Information

From the Departments of Pediatrics (M.D.S., K.G.-M., J.D.M., G.L., P.S.) and Health Studies (D.H.), University of Chicago, Chicago.

Address reprint requests to Dr. Schreiber at the University of Chicago, MC 6060, 5841 S. Maryland Ave., Chicago, IL 60637, or at mschreiber{at}peds.bsd.uchicago.edu.

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