Methods
stridor, paralysis
GROUP B
The current study was a randomized prospective comparative study conducted on 40 patients with BAVFP who were subjected to endoscopic/assisted microscopic posterior cordotomy from 2019 to 2023 after approval of the institutional review board. Informed written consent was taken from every patient before participation in the study.Participants in the trial had to have moderate to severe stridor at least 12 months after a diagnosis of bilateral abductor vocal fold paralysis with a glottic chink of 3 mm or smaller. The study excluded patients with insufficient cardiopulmonary reserve, unilateral vocal fold paralysis, laryngeal masses, age under 20, persistent chronic aspiration, or unfitness for surgery.The patients of the study were alternatively allocated into two equal groups. Group A included 20 patients treated with radiofrequency. Seven of them were tracheostomized preoperatively. Group B included 20 patients treated with controlled coblation using electrosurgical ablation probe. Six patients were tracheostomized. Patients of both groups were subjected to the following protocol.The three authors of the study worked at two different centers with one author at one center using radiofrequency and the other two authors at another center using coblation. Both teams used the same approach (Kashima’s procedure) for posterior cordotomy despite the difference in the used device.