ObjectiveTo evaluate the clinical effects of the MTDSA measured by ultrasound in selecting the cuffed pediatric endotracheal tube size.
MethodsThe tracheal tube sizes in 180 pediatric patients, aged 4 to 12 years, scheduled by general anesthesia operation were empirically selected according to the age based formula.The appropriate tracheal catheter type was determined according to the leakage gas test after intubation, and MTDSA was measured using ultrasound before anesthesia induction endotracheal intubation.The correlation of MTDSA, age, height and body mass with clinical optimal catheter inner diameter(ID) in cases with suitable catheter was analyzed, and the linear regression equation of which was established.The accuracy of catheter selected by ultrasound and age based formula was validated and analyzed in clinic.
ResultsCompared with other factors, MTDSA was well correlated with catheter ID.The linear regression equation determined by ultrasound was established for ID=0.601xMTDSA+0.015(r=0.954).The accuracy rates of ultrasound and age based formula were 80% and 60%, respectively, and the difference of which was statistically significant(χ2=12.40, P < 0.05).
ConclusionsMTDSA measured by ultrasound is an accurate and simple method in guiding the selection of cuffed tracheal tube size in children.
ObjectiveTo evaluate the clinical effects of the MTDSA measured by ultrasound in selecting the cuffed pediatric endotracheal tube size.
MethodsThe tracheal tube sizes in 180 pediatric patients, aged 4 to 12 years, scheduled by general anesthesia operation were empirically selected according to the age based formula.The appropriate tracheal catheter type was determined according to the leakage gas test after intubation, and MTDSA was measured using ultrasound before anesthesia induction endotracheal intubation.The correlation of MTDSA, age, height and body mass with clinical optimal catheter inner diameter(ID) in cases with suitable catheter was analyzed, and the linear regression equation of which was established.The accuracy of catheter selected by ultrasound and age based formula was validated and analyzed in clinic.
ResultsCompared with other factors, MTDSA was well correlated with catheter ID.The linear regression equation determined by ultrasound was established for ID=0.601xMTDSA+0.015(r=0.954).The accuracy rates of ultrasound and age based formula were 80% and 60%, respectively, and the difference of which was statistically significant(χ2=12.40, P < 0.05).
ConclusionsMTDSA measured by ultrasound is an accurate and simple method in guiding the selection of cuffed tracheal tube size in children.
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