[Features of microsurgery of the vestibular larynx using CO and a diode laser]

[Vocal fold polyps: modern possibilities of laser surgery in comparison with the use of cold microinstruments]

OBJECTIVE

To perform a comparative analysis of phonosurgical interventions, which were made using a 445 nm semiconductor laser or cold microinstrumentation in patients with «vocal fold polyp» diagnosis.

MATERIAL AND METHODS

The number of surgical interventions equal 30 regarding vocal fold polyp was done in otorhinolaryngology clinic of Pavlov First State Medical University of St. Petersburg in the period from September 2021 yr. to September 2022 yr. The phonosurgical intervention was performed under the conditions of direct suspension microlaryngoscopy by Kleinsasser under general anesthesia using high frequency ventilation through an endotracheal catheter. Surgical interventions were carried out using a 445-nm semiconductor laser in pulsed mode for patients of the 1st group (n=15) and using microsurgical instruments for patients of the 2nd group (n=15). The comparative analysis was conducted based on the results of an objective vocal function assessment by acoustic analysis, as well as on the data of a subjective assessment of the voice using the questionnaire VHI-10rus. The severity of reactive inflammatory phenomena in the postoperative period has been compared and the oscillating movements of vocal folds have been evaluated according to the videolaryngoscopy data. The severity of pain syndrome in the postoperative period was assessed by visual analogue scale.

RESULTS

There were no statistically significant differences in the results between two groups. Similarly, there were no statistically significant differences in parameter recovery degree, evaluated by videolaryngoscopy data. Moreover, a full recovery of mucosal wave was found in 93% of patients operated with laser on 7th day, while 47% of patients had the same result after use of cold microinstrumentation.

CONCLUSION

The use of 445-nm semiconductor laser for phonosurgical interventions in vocal folds' polyps can be recommended for predicted successful recovery of vocal function, minimization of reactive inflammatory phenomena in postoperative period and early patients' rehabilitation.

[Laryngeal cysts in children]

Laryngeal cysts in children are relatively rare, occupying the 4-5th place in the structure of congenital malformations. The paper presents the combined experience of two Russian pediatric otorhinolaryngological clinics traditionally involved in the rehabilitation of patients with congenital and acquired pathology of the larynx.

OBJECTIVE

To analyze the features of the clinic, diagnosis and treatment of laryngeal cysts in children.

MATERIAL AND METHODS

The study included 68 children with laryngeal cysts aged from 3 days to 16 years (on average 39.5±37.0 months, Me=15.5 months). The cyst was localized in the vestibular region of the larynx in 15 (22.1%) patients, in the vocal region - in 15 (22.1%) patients, and in the sub-vocal region - in 38 (55.9%) patients. Data on the presence of a history of tracheal intubation were available in 35 (89.7%) children, including 35 (92.1%) of 38 children with a subfold cyst. 11 patients were admitted with a previously applied tracheostomy.

RESULTS

The main reasons for going to the clinic were signs of laryngeal stenosis (stridor, signs of obstruction of the upper airways) in 60.3% of patients, dysphonia - in 33.8%, and in 5.9%, the detection of a cyst became an accidental finding. To eliminate the cyst, the method of laser marsupialization was used in 10 patients, coagulatory ablation - in 2 patients, in the remaining 56 patients, decortication was performed with microinstruments, followed by laser treatment of the cyst bed. In the follow-up, children were traced from 6 months to 7 years. We did not observe a recurrence of a cyst in any case.

CONCLUSION

Currently, the lining department is the "favorite" localization of the cyst in childhood. Subclavian cysts are more common in preterm infants who need tracheal intubation. A necessary condition for radical elimination is the resection of the cyst walls.