Surgical management of laryngeal bilateral abductor palsy: comparative study between carbon dioxide and diode lasers

• Published in: Lasers in medical science Vol. 37; no. 8; pp. 3169 - 3175
• Main Authors: El-Sobki, Ahmed, El-Deeb, Mohamed E., El-Kholy, Noha Ahmed, Habaza, Fedaey R., Shawky, Mahmoud Ahmed, Alsobky, Mahmoud Elsaid Ibrahim
• Format: Journal Article
• Language: English
• Published: London Springer London 01.10.2022; Springer Nature B.V
• Subjects: Carbon dioxide; Carbon dioxide lasers; Chi-square test; Comparative studies; Dentistry; Dyspnea; Lasers; Medical research; Medicine; Medicine & Public Health; Optical Devices; Optics; Original; Original Article; Pain; Paralysis; Patients; Phonation; Photonics; Quantum Optics; Respiration; Semiconductor lasers; Statistical analysis; Vocal cords; Vocal organs; Voice; Wavelength; laser; CO; Glottis; Diode laser; Bilateral vocal fold paralysis; CO2 laser
• ISSN: 1435-604X; 0268-8921; 1435-604X
• DOI: 10.1007/s10103-022-03589-x

This study aims to compare the results of both CO 2 laser and diode laser combined arytenoidectomy with posterior cordectomy in managing patients with bilateral vocal fold paralysis. A prospective study involved 80 bilateral vocal cord immobility patients in adduction. They are divided into two groups according to the laser used, whether CO 2 (with a wavelength of 10.6 µm) or diode (with a wavelength of 980 nm). We used mMRC (Modified Medical Research Council) dyspnea scale to assess dyspnea in our patients, while the voice was evaluated by both maximum phonation time and the voice handicap index. Quantitative variables were described using means and standard deviations, while categorical variables were described using frequencies and were compared using the chi-square test, Fisher exact test, and Monte Carlo test. There was a statistically non-significant difference between the studied groups regarding mMRC dyspnea scale and Voice Handicap Index preoperatively and postoperatively. There is a statistically significant difference between the two groups regarding maximum phonation time postoperatively (significantly higher in the CO 2 laser group) ( p  < 0.001). The CO 2 laser and diode laser could be used safely for the management of bilateral vocal cord paralysis. The CO 2 laser maintains better voice parameters and less postoperative pain, while the diode laser gives less operative time, lower cost, and simplicity of use.