Final answer:
The appropriate ET tube size for intubation is estimated based on the baby's weight.
Step-by-step explanation:
The appropriate ET tube size for intubation is estimated based on the baby's weight. The weight of the baby is a reliable indicator of the size of the airway and the appropriate size of the endotracheal (ET) tube to be used.
During doctor visits throughout the first year of life, a baby's weight and length are measured to assess whether the baby is growing normally. The actual weight is compared to standard weight values for infants of the same age to determine if the baby is growing normally.
It is important to use the correct ET tube size to ensure proper ventilation and prevent complications during intubation.