Abstract
Objective To evaluate the effect of hypothermia on the endotracheal tube cuff pressure during cardiopulmonary bypass in the pediatric patients with congenital heart disease. Methods Forty pediatric patients of both sexes, of American Society of Anesthesiologists physical status Ⅱ–Ⅳ, aged 1 months–14 yr, weighing 3–58 kg, scheduled for elective surgery for congenital heart disease using cardiopulmonary bypass, were included in this study. All the pediatric patients were intubated with a cuffed endotracheal tube. After anesthesia induction and endotracheal intubation, the air was injected into the cuff to make the cuff pressure reach 20 cm H2O (baseline). The endotracheal tube cuff pressure was recorded when the esophageal temperature was reduced to 34, 32, 30, 28 and below 28 ℃ and returned to 28, 30, 32, 34 and 36 ℃. Results The cuff pressure was significantly decreased when the esophageal temperature was reduced to 30 and 28 ℃ and below 28 ℃ and returned to 28, 30, 32 and 34 ℃ as compared with the baseline(P<0.05). Conclusion Hypothermia can reduce the endotracheal tube cuff pressure during cardiopulmonary bypass, and it is recommended to routinely monitor the cuff pressure in the pediatric patients with congenital heart disease. Key words: Hypothermia; Cardiopulmonary bypass; Intubation, intratracheal; Children
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