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Prolonged mechanical ventilation of infants after open heart surgery
Insights
Mechanical ventilation (MV) duration after pediatric open heart surgery was studied. Factors like younger age and longer bypass times predicted prolonged MV, but mortality remained similar regardless of MV length.
Area of Science:
- Pediatric Cardiac Surgery
- Critical Care Medicine
- Respiratory Support
Background:
- Open heart surgery in infants carries risks, including the need for mechanical ventilation (MV).
- Understanding factors influencing MV duration is crucial for optimizing patient outcomes in pediatric cardiac surgery.
Purpose of the Study:
- To evaluate the duration of postoperative mechanical ventilation (MV) in infants after open heart surgery.
- To determine the relationship between prolonged MV and mortality.
- To identify patient-specific variables predisposing to prolonged MV.
Main Methods:
- Retrospective study of 140 infants younger than 2 years undergoing open heart surgery.
- Analysis of preoperative, intraoperative, and postoperative variables.
- Evaluation of mechanical ventilation duration and mortality rates.
Main Results:
- 56% of infants required MV beyond postoperative day 1; 19% required MV for at least 7 days.
- Mortality rates were similar (16-17%) for infants with MV duration >7 days versus shorter durations.
- Younger age, longer cardiopulmonary bypass time, longer aortic cross-clamp time, and preoperative MV were associated with prolonged MV.
Conclusions:
- Prolonged mechanical ventilation in infants after open heart surgery is influenced by multiple factors, including younger age and surgical complexity.
- While prolonged MV did not significantly increase mortality in this cohort, strategies to minimize its duration are important.
- Early nutritional support, vigilant complication surveillance, and avoiding premature extubation may mitigate the adverse effects of prolonged MV.
Abstract:
Records of 140 infants younger than 2 yr of age who had undergone open heart surgery were studied to evaluate the duration of postoperative mechanical ventilation (MV), to determine the relationship between prolonged MV and mortality, and to identify variables predisposing the patient to prolonged MV. MV was required beyond the first postoperative day in 56 infants, and was prolonged for at least 7 days in 19 infants. Mortality was approximately the same (16% to 17%) whether or not MV was required for more than 7 days. Preoperative and intraoperative variables associated with longer MV included younger age, longer cardiopulmonary bypass time, longer aortic cross-clamp time, and preoperative MV. Multiple predisposing factors increased the probability of prolonged MV. Postoperative variables including premature extubation and a second surgical procedure also were associated with prolonged MV. The consequences of prolonged MV may be minimized by early nutritional support, aggressive surveillance for treatable complications, and avoidance of premature extubation.