Patients aged 16 years or younger who were to undergo adenoidectomy surgery were eligible for inclusion in this group. Tongue surface areas were measured twice by submental USG.The first measurements (TSA2) were done immediately after endotracheal intubation but before insertion and placement of the tongue depressor. The second measurements (TSA1) were done after adenoidectomy surgery and after removal of the tongue depressor but just before extubation. The difference between TSA2 and TSA1 (i.e., (TSA2-TSA1) was used to defined the occurrence of tongue swelling.

This group included patients aged 16 years or younger who did not need adenoidectomy surgery and any head and neck procedures. Tongue surface areas of the patients were measured twice by submental USG as in the study group. TSA1s were done immediately after endotracheal intubation, and TSA2s were done at the end of the surgical procedure just before extubation. The difference between TSA2 and TSA1 (i.e., (TSA2-TSA1) was used to defined the occurrence of tongue edema.

This study aimed to measure the tongue surface areas of the patients two times both of study and control groups with ultrasonography imaging to compare the tongue surface areas.

This study aimed to evaluate the change from baseline in tongue surface area on the ultrasonography imaging due to the tongue depressor.

This study aimed to measure and detect the tongue swelling by using ultrasonography imaging due to the tongue depressor.