Ultrasound Study of the Airway to Predict Endotracheal Tube Size in Anesthetized Pediatric Patients

Ultrasound Study of the Airway to Predict Endotracheal Tube Size in Anesthetized Pediatric Patients

The purpose of this study is to determine whether ultrasound study of the airway to predict endotracheal tube size in anesthetized pediatric patients better than the tube size formula

This study is to compare the methods of selecting uncuffed endotracheal tube size in pediatric patients between conventional age-based formula and ultrasound measurement of subglottic diameter.

Inclusion Criteria:

• Age 1-6 Years
• ASA class 1-2
• Elective Surgery
• GA with oral uncuff endotracheal tube

Exclusion Criteria:

• Potential difficult air way from history and physical exam
• Allergy ti ultrasound gel
• neck mass
• unstable vital sign