ENDOTRACHEAL TUBE SIZE CHILDREN

FOR INFANTS UP TO 1 YEAR OF AGE

• UNCUFFED TUBE WITH AN INTERNAL DIAMETER OF 3.5 MM• A CUFFED ETT WITH AN INTERNAL DIAMETER OF 3.0 MM MAY BE USED FOR

INFANTS MORE THAN 3.5 KG. AND <1 YEAR

FORMULA

• UNCUFFED ET SIZE = 4 + (AGE / 4) • CUFFED ET SIZE = 3.5 + (AGE / 4)

ONE SIZE LESS

• FOR CUFFED TUBE FOR AGE LESS THAN 1 YR

ADDITIONAL

• KEEP ONE HALF SIZE LARGER AND ONE HALF SIZE SMALLER THAN CALCULATED SHOULD ALSO BE AVAILABLE FOR UNCUFFED OR CUFFED ENDOTRACHEAL TUBE

THUMB RULE

• ET TUBE ID SIZE IS SAME AS THE DIAMETER OF THE LITTLE FINGER OF THE PATIENT