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Successful direct extubation of very low birth weight infants from low intermittent mandatory ventilation rate
Insights
Direct extubation from mechanical ventilation is more successful than using continuous positive airway pressure for six hours in very low birth weight infants. This approach reduces the risk of respiratory complications and ventilatory failure.
Area of Science:
- Neonatal Medicine
- Pediatric Pulmonology
- Critical Care
Background:
- Mechanical ventilation is common for infants, with extubation often preceded by continuous positive airway pressure (CPAP).
- Small endotracheal tubes may increase airway resistance and work of breathing, potentially leading to extubation failure.
- Evidence regarding the efficacy of pre-extubation CPAP in neonates is limited.
Purpose of the Study:
- To compare the success rates of direct extubation versus a six-hour pre-extubation CPAP trial in very low birth weight infants.
- To assess the incidence of apnea and respiratory acidosis associated with each extubation strategy.
Main Methods:
- A randomized study of 27 very low birth weight infants (1-28 days old) undergoing extubation.
- Group 1 (n=13): direct extubation from intermittent mandatory ventilation (IMV).
- Group 2 (n=14): six-hour pre-extubation CPAP trial via endotracheal tube.
Main Results:
- No significant differences in infant demographics or lung disease severity between groups.
- Successful extubation in 100% (13/13) of infants in the direct extubation group.
- Successful extubation in 50% (7/14) of infants in the CPAP group; six experienced significant apnea, one developed respiratory acidosis.
Conclusions:
- Direct extubation from IMV appears to be a more successful strategy for very low birth weight infants.
- Pre-extubation CPAP may increase the risk of adverse respiratory events and extubation failure in this population.
- Infants failing CPAP trials were successfully extubated upon direct transition from low IMV rates.
Abstract:
It is common practice to use endotracheal continuous positive airway pressure for various time periods up to 24 hours before attempting extubation in infants who are mechanically ventilated. A few studies in newborns have indicated that airway resistance is increased through small endotracheal tubes. This increases the work of breathing and the likelihood of subsequent ventilatory failure. In this study, 27 very low birth weight infants who were 1/2 to 28 days old at the time of extubation were randomly divided into two groups. One group of 13 study infants were extubated directly from intermittent mandatory ventilation rates of six to ten per minute, and the other 14 control infants were placed on continuous positive airway pressure through endotracheal tubes for six hours prior to an attempt to extubate. There was no difference between the two groups in gestational age, postnatal age, weight, or severity of lung disease at the time of extubation. All 13 study infants were successfully extubated without significant apnea or respiratory acidosis. Of the 14 control infants, only seven were successfully extubated; six infants had significant apnea and in one infant respiratory acidosis with pH 7.13 and PCO2 65 developed while receiving continuous positive airway pressure (13/13 v 7/14, P less than .005). The seven infants who failed the preextubation trial of continuous positive airway pressure were later extubated from low intermittent mandatory ventilation rates without significant apnea or respiratory acidosis.(ABSTRACT TRUNCATED AT 250 WORDS)