Comparison of Ultrasound-Guided Superior Laryngeal Nerve Block with theTraditional Method for Direct Laryngoscopic Biopsy of Supraglottic Masses:A Clinical Trial

Background: A bilateral superior laryngeal nerve block (SLNB) can provide complete anesthesia for laryngealsampling and byproviding this block we can manage the biopsy of supraglottic masses without the complications of generalanesthesia.Objectives: This study aimed to compare ۲ superior laryngeal nerve block (SLNB) methods using ultrasoundand the traditionalmethod for direct laryngoscopic surgery for the biopsy of supraglottic masses.Methods: In this single-blind clinical trial, ۵۰ patients undergoing supraglottic laryngeal mass biopsy underdirect laryngoscopywere divided into ۲ groups. The first group was anatomical landmark bilateral SLNB (C group), and the secondgroup was sonoguidedbilateral SLNB (U group). Hemodynamic changes, pain, oxygen desaturation, surgeon satisfaction, and thecomplicationobtained and noted.Results: There was no significant difference in the success rate of the procedure (P = ۰.۹۹), as well as thesurgeon's satisfaction withthe procedure (P = ۰.۳۳۷). Mean arterial pressure (MAP), oxygen saturation, and their changes in the studiedgroups were comparedbefore the block, after the block, after the biopsy, and in the recovery room, showing no significant differencebetween the ۲ groups(P > ۰.۰۵). Only the heart rate (HR) after the biopsy and in the recovery room showed significant differencesbetween the ۲ groups(P < ۰.۰۵). There was no significant difference between the ۲ groups in the level of patient and surgeonsatisfaction and pain duringand after the procedure (P > ۰.۰۰۵).Conclusions: SLNB for direct laryngoscopic surgery for biopsy of supraglottic masses using ultrasound wasnot significantly superiorto the traditional method, and there was no significant difference between the ۲ methods in terms of proceduresuccess,surgeon's satisfaction, and patients' pain.

کلیدواژه ها:

Superior Laryngeal Nerve Block ، Ultrasound ، Laryngoscopic Surgery ، Supraglottic Biopsy