A Formula Based on Body Length for Determining the Size of an Uncuffed Endotracheal Tube for Pediatric Cardiac Anesthesia

Shiroyama Kazuhisa

Izumi Hiromichi

Kubo Takashi

Kawamoto Masashi

Yuge Osafumi

Hiroshima Journal of Medical Sciences

[PISSN] 0018-2052

[EISSN] 2433-7668

[NCID] AA00664312

Three hundred and thirty-four pediatric patients less than 4 years old who underwent surgery for congenital heart disease were retrospectively studied to devise a practical formula for predicting the appropriate size for an uncuffed endotracheal tube for pediatric cardiac anesthesia. Furthermore, this formula was compared with that for non-cardiac anesthesia obtained from 409 patients without congenital heart disease. A simple regression equation between tube size and body length resulted in the simple predictive formula: "tube size= 0.04 x body length+ 1.6" for pediatric cardiac anesthesia. This formula had the same slope and an approximately 0.3 mm larger intercept on the Y-axis compared with that for pediatric non-cardiac anesthesia. Therefore, a one-size larger endotracheal tube is more suitable for use in pediatric cardiac anesthesia than in pediatric non-cardiac anesthesia for the same body length.

Endotracheal tube size

Formula for prediction

Body length

Pediatric cardiac anesthesia

Medical sciences [ 490 ]

eng

Hiroshima University Medical Press

[ISSN] 0018-2052

[NCID] AA00664312