The advantages of high-frame-rate videos in fiber endoscopic evaluation of swallowing.

Alizadeh Agdam, M.(Mehran) (2016) The advantages of high-frame-rate videos in fiber endoscopic evaluation of swallowing. thesis, Medicine.

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Abstract

Objectives: The purpose of this study was to verify whether or not high-frame-rate (HFR) videos were superior to standard-frame-rate (SFR) videos in the visual recognition of motion of the laryngopharyngeal structures during the pharyngeal phase of swallowing. Method: Five healthy subjects were asked to swallow 0.5 ml water under fiberoptic transnasal laryngoscopy. The endoscope was connected to a high-speed digital imaging (HSDI) camera, which recorded the laryngopharyngeal view throughout the swallowing process at 4000 frames per second (fps). A total of five HFR videos were recorded, and were then copied and downsampled into a standard-frame-rate video version with 30 fps. Fifteen otorhinolaryngologists observed all ten HFR and SFR videos in random order, and rated the videos on a four-point rating scale reflecting the degree of the visual recognition of the rapid motions of the laryngopharyngeal structures just before the ‘white-out’ phenomenon. Results: The number of observers judging the HFR videos with higher scores compared to the SFR videos was significantly higher for most laryngopharyngeal structures. These structures include: the posterior pharyngeal wall (p=0.001), the left lateral pharyngeal wall (p=0.015), the right lateral pharyngeal (p=0.035), the tongue base (p=0.005), and the epiglottis tilting (p=0.005). Only the recognition of laryngeal elevation (p=0.059) did not seem to benefit from a higher frame rate. Conclusion: These results demonstrated the superiority of HFR videos compared to SFR videos in the evaluation of the contractive motions of the pharyngeal structures during the pharyngeal phase of swallowing.

Item Type:	Thesis (Thesis)
Supervisor name:	Supervisor Groningen, Netherlands and Dikkers, Dr. F.G. MD and University of Groningen and Department of Otorhinolaryngology-Head and Neck Surgery
Supervisor name:	Supervisor Osaka, Japan and Ogawa, Dr. M. MD and Department of Otorhinolaryngology-Head and Neck Surgery and Osaka University Graduate School of Medicine, Osaka Universi
Faculty:	Medical Sciences
Date Deposited:	25 Jun 2020 10:55
Last Modified:	25 Jun 2020 10:55
URI:	https://umcg.studenttheses.ub.rug.nl/id/eprint/1559

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