Proportion and usage of cuffed endotracheal tube in children undergoing surgery under general anesthesia in Maharaj Nakorn Chiang Mai Hospital
Keywords:
cuff, endotracheal tube, children, size, depthAbstract
Background: Cuffed endotracheal tubes [COT]
become more frequently used instead of non-cuffed
endotracheal tube [NCOT] for sufficient ventilation
in pediatric patients during general anesthesia. Age
based formulas have been widely used to predicted
the appropriate size and depth of cuffed endotracheal
tube however these formula are based on western
population. The goal of study was to determine
proportion of cuffed endotracheal tube used in
children and whether the selection of COT using age
based formulas was appropriate for Thai children
in terms of depth and size. Methods: After the
approval of The Institutional Ethics Committee, the
retrospective descriptive study was conducted in
children aged 2–8 years that were intubated with
COT in Maharaj Nakorn Chiang Mai Hospital
between January 1, 2012 - December 31, 2012. The
exclusion criteria were airway abnormality. In our
institute, pediatric COT size is selected by using the
age based formula for size {Internal diameter [mm.]
= 3.5 + age/4} and depth {depth [cm.] = 12 + age/2}.
Age, gender, weight, type of endotracheal tube,
tube size, tube depth and type of operation were
record. Percentage was performed for all variables.
The primary outcome was proportional COT usage.
The secondary outcome was to compare the calculated
tube size and depth to the actual size and depth of COT
that was used in each of the patient. Results: Three
hundred and ten records were analyzed. The proportion
of COT used was 39% (122/310) as a primary outcome
then one hundred and twenty two patients who were
intubated with COT were analyzed for secondary
outcome. The calculated size and depth of COT were
smaller and shallower than actually usage in all age
group. Conclusions: At present we often use COT in
pediatric patients. Tube size and depth that calculated
from age based formulas are smaller and shallower than
practical use. Further prospective study is warranted.
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