[Treatment of congenital bilateral choanal atresia by low temperature plasma ablation and fully degradable sinus drug stent: a case report].

To investigate the application of low temperature plasma ablation combined with fullly degradable sinus stent system in the treatment of congenital choanal atresia mainly menbranous atresia. A child with membranous bilateral choanal atresia admitted in April 2023 was analyzed. This case underwent endoscopic ablative posterior nostriplasty and placed a fully degradable drug stent in bilateral operative cavities. The case's nasal ventilation was effectively improved after operation and the profile of postnaris was well formed. No restenosis oratresia was found under electronic nasopharyngoscope and the drug stent was completely degraded after 8 months follow-up. Low temperature plasma ablation has the advantages of reducing surgical trauma, protecting normal tissue and avoiding complications in the treatment of congenital choanal atresia. At the same time, combined with the application of the fully degradable sinus drug stent, it can achieve remarkable efficacy by alleviating mucosal edema, reducing granulation tissue hyperplasia, accelerating wound mucosification, and effectively reducing the incidence of nasal adhesion, restenosis or even atresia.