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Steering Sheath for 2-Nostril Transnasal Office Laryngoscopy.
Annals of Otology, Rhinology, and Laryngology 2018 Februrary
OBJECTIVE: The aim was to study the feasibility of performing office-based laryngeal procedures employing a flexible hollow steerable sheath placed contralateral to the nostril through which a standard flexible video endoscope is placed.
METHODS: The study design included simulation of transnasal endoscopic laryngeal procedures evaluating the use of a flexible steering sheath in laboratory and clinic settings. Transnasal laryngeal procedures were performed in an otolaryngology office setting employing an airway-management-trainer mannequin and then repeated in a human cadaver lab with standard transnasal flexible video laryngoscopy. Video documentation assessed use of a lever-manipulated deflecting ureteral access sheath with an inner diameter of 2.97 mm, an outer diameter of 4.95 mm, and a length of 45 cm. Simulated transnasal laryngoscopy procedures deployed devices through the deflecting sheath to mimic vocal fold needle injection, biopsy with forceps, balloon dilation, and laser treatment to identify strengths and shortcomings to the technology and technique.
RESULTS: Simulation was successful in appropriately directing instrumentation for all procedures tested. Shortcomings included limitations in steering capacity, greater length to the sheath than desirable for laryngeal procedures, and the need for additional assistants to perform procedures.
CONCLUSION: Steering sheath technology is applicable to enhance in-office transnasal laryngoscopy procedures.
METHODS: The study design included simulation of transnasal endoscopic laryngeal procedures evaluating the use of a flexible steering sheath in laboratory and clinic settings. Transnasal laryngeal procedures were performed in an otolaryngology office setting employing an airway-management-trainer mannequin and then repeated in a human cadaver lab with standard transnasal flexible video laryngoscopy. Video documentation assessed use of a lever-manipulated deflecting ureteral access sheath with an inner diameter of 2.97 mm, an outer diameter of 4.95 mm, and a length of 45 cm. Simulated transnasal laryngoscopy procedures deployed devices through the deflecting sheath to mimic vocal fold needle injection, biopsy with forceps, balloon dilation, and laser treatment to identify strengths and shortcomings to the technology and technique.
RESULTS: Simulation was successful in appropriately directing instrumentation for all procedures tested. Shortcomings included limitations in steering capacity, greater length to the sheath than desirable for laryngeal procedures, and the need for additional assistants to perform procedures.
CONCLUSION: Steering sheath technology is applicable to enhance in-office transnasal laryngoscopy procedures.
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