Tuesday, May 15, 2012

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Determining the size of the endotracheal tube


Adults: 
We must select the largest diameter ETT that can be tolerated for adults. 
A size 7.5-mm cuffed ETT is well tolerated by most adult female patients. 
A size 8.0-mm cuffed ETT is well tolerated by most adult male patients.


Pediatrics: 
An uncuffed ETT should be used for children under the age of 8 years.  


The formula most commonly used is:
ETT size(mm) = (Age[yr] +16)/4


To estimate the depth of insertion for a child older than 2 years:
Depth of insertion = 3× internal diameter of the ETT

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