Section: 
Diseases of the lymphoepithelial pharyngeal ring and neck
Diseases of the lymphoepithelial pharyngeal ring and neckComparative assessment of clinical efficacy of 445 and 980 nm direct diode lasers in the surgical treatment of chronic paralytic laryngeal stenosis
P. I. Panchenko (1), A. A. Krivopalov (2), P. A. Shamkina (3), K. Sh. Sheikhametov (4), A. I. Glushenko (5), B. V. Kuts (6)
(1), (2), (3), (4), (5), (6) Saint Petersburg Scientific Research Institute of Ear, Throat, Nose and Speech, Saint Petersburg, 190013, Russian Federation, (2) Mechnikov Northwestern State Medical University, Saint Petersburg, 191015, Russian Federation, (6) Kirov Military Medical Academy, Saint Petersburg, 194044, Russian Federation
UDK: УДК 616.22-009.11-007.271-089.8-035:621.373.5
DOI: https://doi.org/10.18692/1810-4800-2026-1-24-35
ABSTRACT
Abstract. Introduction. The surgical treatment of patients with chronic paralytic laryngeal stenosis remains relevant to the present. The development of laser technologies and the widespread use of surgical semiconductor lasers in surgery, expanding the possibilities of effective treatment of paralytic laryngeal stenosis, remain in demand. Objective. To increase the effectiveness of surgical treatment of chronic paralytic laryngeal stenosis in patients using 445 nm and 980 nm semiconductor laser. Patients and methods. The performed study was clinical, simple, comparative, and prospective one, which involved 58 patients with a verified diagnosis of chronic paralytic laryngeal stenosis of various etiologies. All patients were randomly selected and divided into 2 groups. Intraoperative tissue changes were assessed in real time in patients who underwent surgical treatment using 445 and 980 nm semiconductor lasers. In the postoperative period, the endolaryngoscopic picture of reparative processes was evaluated, indicators of respiratory function, vocal function, as well as questionnaire data using various questionnaires were analyzed. In group 1 (n = 30), a surgical laser with a wavelength of 445 nm (blue light) was used at the stages of surgery, and in the second group (n = 28), a semiconductor laser with a wavelength of 980 nm was used. Results and discussion. It was found that the use of a laser with a wavelength of 445 nm is accompanied not only by lower thermal alteration of the soft tissues of the larynx, but also by a faster regression of inflammatory changes in the postoperative period. Better acoustic parameters of the patients’ voice were noted when using the specified wavelength. In both groups, compensation for laryngeal stenosis was achieved (FEV > 70% of the required level after 12 months). Subjectively, patients noted a significant increase in quality of life and the preservation of a socially acceptable voice. There were no complications. Conclusions. The use at the stages of surgical rehabilitation of patients with paralytic laryngeal stenosis is important. The results of the study showed high efficacy and safety of laser exposure of 445 and 980 nm to damaged areas of the larynx during surgery, ensuring early recovery of breathing and maintaining satisfactory voice quality.
Publication date:
24.02.2026
Keywords:
arynx, laryngeal paralysis, laryngeal stenosis, laser surgery, chordaritenoidotomy, 445 and 980 nm lasers For citation:
Panchenko P. I., Krivopalov A. A., Shamkina P. A., Sheikhametov K. Sh., Glushenko A. I., Kuts B. V. Comparative assessment of clinical efficacy of 445 and 980 nm direct diode lasers in the surgical treatment of chronic paralytic laryngeal stenosis. Russian Otorhinolaryngology. 2026;25(1):24-35. (In Russ.) https://doi.org/10.18692/1810-4800-2026-1-24-35