Role of stroboscopy in evaluation of patients with vocal abnormalities

Authors

  • Yashveer Jayantha Kedilaya Department of ENT, Gandhi Medical College, Bhopal, Madhya Pradesh, India
  • Ashly Alexander Department of ENT, Gandhi Medical College, Bhopal, Madhya Pradesh, India http://orcid.org/0000-0002-9024-1750
  • Abhishek Malviya Department of ENT, Gandhi Medical College, Bhopal, Madhya Pradesh, India
  • Akshay V. Tamrakar Department of ENT, Gandhi Medical College, Bhopal, Madhya Pradesh, India

DOI:

https://doi.org/10.18203/issn.2454-5929.ijohns20214458

Keywords:

Voice abnormality, Stroboscopy, Vocal cord pathology, Mucosal wave pattern

Abstract

Background: Stroboscopy is an examination in which strobe light is combined with laryngoscopy, to visualize the vocal fold vibration. It makes use of the Talbot’s law for visualizing the vibrating vocal fold having frequency of around 250 times per sec. This technique was used for studying voice abnormalities and evaluate related pathologies. The aim and objective was to evaluate patients with vocal abnormalities with the help of stroboscope and to study the mucosal wave pattern pre and post treatment of vocal cord pathologies.

Methods: A prospective observational study was conducted at a tertiary care facility in central India. 50 patients with vocal abnormalities for more than 2 weeks were subjected to stroboscopy. Written informed consent from eligible patients was obtained and they were evaluated by stroboscopy using Karl Storz stroboscope with 70 degree 8 mm telescope, model no.: 20140020032. A second follow up stroboscopy was done two months post treatment and the parameters were recorded.

Results: VC nodule was observed as the most common pathology followed by vocal polyp, carcinoma and chronic laryngitis. It was also observed that there was statistically significant difference (p<0.001) in pre and post treatment findings of different parameters of voice evaluated using stroboscopy.

Conclusions: Video stroboscopic evaluation proved to be a useful and reliable tool for evaluation and treatment of the patients with voice abnormalities as the changes in pre and post treatment voice parameters were found to be statistically significant.

References

Schuster M, Lohscheller J, Kummer P, Eysholdt U, Hoppe U. Laser projection in high-speed glottography for high-precision measurements of laryngeal dimensions and dynamics. Eur Arch Otorhinolaryngol. 2005;262(6):477-81.

Patel R, Dailey S, Bless D. Comparison of high-speed digital imaging with stroboscopy for laryngeal imaging of glottal disorders. Ann Otol Rhinol Laryngol. 2008;117(6):413-24.

Rajput SD, Poriya MJ. Stroboscopy: an evolving tool for voice analysis in vocal cord pathologies. Int J Otorhinolaryngol Head Neck Surg 2017;3:927-31.

Fritzel B. Analysis of longitudinal phase differences in vocal-fold vibration using synchronous high-speed videoendoscopy and electroglottography. J Voice. 2012;26(6):816.

Thomas G, Mathews SS, Chrysolyte SB, Rupa V. Outcome analysis of benign vocal cord lesions by videostroboscopy, acoustic analysis and voice handicap index. Indian J Otolaryngolo Head Neck Surg. 2007;59(4):336-40.

Shin YS, Chang JW, Yang SM, Wu HW, Cho MH, Kim CH. Persistent dysphonia after laryngomicrosurgery for benign vocal fold disease. Clin Exp Otorhinolaryngol. 2013;6(3):166-70.

Nimkar N, Soni H. Role of stroboscopy in diagnosis of laryngeal disorder. Int J Otorhinolaryngol Head Neck Surg. 2019;5(3):560-2.

Danasekaran VS, Shankar R, Dhanyan H. Assessment of malignant and non-malignant lesions of the vocal cord using videostroboscopy. Tropic J Med Res. 2014;17(2):99-103.

Pal KS, Kaushal AK, Nagpure PS, Agarwal G. Etiopathological study of 100 patients of hoarseness of voice: in a rural based hospital. Indian J Otolaryngol Head Neck Surg. 2014;66(1):40-5.

Printza A, Triaridis S, Themelis C, Constantinidis J. Stroboscopy for benign laryngeal pathology in evidence based health care. Hippokratia. 2012;16(4):324-8.

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Published

2021-11-25

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Section

Original Research Articles