Comparison of transnasal and transoral routes of microdebrider combined curettage adenoidectomy and assessment of endoscopy for residue: a randomized prospective study.

PURPOSE: The aim of this study is to investigate the frequency and locations of residual adenoid tissue in conventional curettage adenoidectomy (CA) via transnasal endoscopic examination at the end of the operation and to determine the most appropriate technique for residual adenoid tissue removal by transoral or transnasal microdebrider usage. METHODS: Sixty-three patients aged 4-12 years who were scheduled for CA were included in this randomized prospective study in a tertiary reference center. Patients who underwent CA had the endoscopic residual tissue exploration at the end of surgery. The amount and locations of residual tissue were recorded. Patients with > 20% residual tissue were divided into two groups according to randomization list for removing the residual tissue, depending on the use of transoral microdebrider (TOMD) and transnasal microdebrider (TNMD). Two procedures were compared in terms of duration, bleeding, pain, post-anesthesia care unit (PACU) transfer time, and complications. RESULTS: Residual tissue was detected in 38 patients (60.2%). The most common location of residual tissue was peritubal area (41.3%). The TOMD group had lower surgical duration, blood loss, pain scores and shorter PACU transfer time (p = 0.001, p = 0.002, p˂0.001, and p = 0.006, respectively). CONCLUSION: Endoscopic exploration at the end of CA should be considered to avoid residual tissue retention. Furthermore, if residual tissue is present, the use of TOMD is easier, faster, and associated with lower morbidity than the use of TNMD.