Cuffed endotracheal tubes in neonates and infants undergoing cardiac surgery are not associated with airway complications.

STUDY OBJECTIVE: To determine the incidence of postoperative airway complications in infants <5kg in weight undergoing cardiac surgery intubated with Microcuff (Kimberley-Clark, Roswell, GA) endotracheal tubes (ETTs). DESIGN: Retrospective review of infants weighing <5.0 kg with congenital heart disease (CHD) presenting for cardiac surgery. SETTING: Single-center, tertiary pediatric cardiac critical care unit at a university hospital. PATIENTS: A total of 208 infants weighing <5 kg underwent cardiac surgery for CHD from 2008 to 2013. INTERVENTION: Intubation with Microcuff (Kimberley-Clark) ETTs. STUDY DESIGN: Retrospective review of infants weighing <5.0 kg with CHD presenting for cardiac surgery to a single-center tertiary care university hospital. MEASUREMENTS: Perioperative data were collected. Primary outcome was development of tracheal stenosis and/or reintubation for stridor. Stridor was defined as mild (≤2 doses of racemic epinephrine), moderate (>2 doses of racemic epinephrine), or severe (requiring reintubation). Secondary outcomes were variables possibly contributing to postextubation stridor. Infants with a tracheostomy, airway anomalies, and death prior to initial extubation were excluded. Logistic regression analysis was performed to evaluate the association between clinical risk factors and the incidence of postextubation stridor. RESULTS: A total of 208 infants weighing <5 kg underwent cardiac surgery for CHD from 2008 to 2013; 12 subjects were excluded for death prior to initial extubation. No infant developed tracheal stenosis. The incidence of any stridor was 20.9% (95% confidence interval, 15.8%-27.1%) with severe stridor in 2 cases (1%). Age at surgery, weight, duration of intubation, dexamethasone use, and ETT size were not significantly associated with postextubation stridor. Presence of a comorbidity was significantly associated with stridor (P=.01). CONCLUSIONS: Microcuff ETTs in infants <5.0 kg in weight undergoing cardiac surgery are associated with a low incidence of severe postextubation stridor. Because cuffed ETTs allow for improved control of ventilation/oxygenation and decreased risk of aspiration, they should be considered for use in this high-risk population. Larger studies are needed to confirm these results.