研究目的
To assess the usability of a high-resolution ENT video endoscope with image quality equivalent to gastric video endoscopes for improved detection of pharyngeal and laryngeal disorders.
研究成果
The VNL-1590 STi endoscope provides high-resolution imaging equivalent to gastric endoscopes, enabling clear observation of abnormal vascular patterns and improving early detection of carcinomas in ENT clinics, with good patient tolerance and handling similar to standard ENT scopes.
研究不足
The endoscope has a relatively large diameter, which may limit use in patients with severe nasal deviation; it requires nasal pretreatment, and the study was conducted over a limited period without long-term follow-up.
1：Experimental Design and Method Selection:
The study involved evaluating a new ENT video endoscope (Pentax VNL-1590 STi) for its image resolution using the USAF test chart and its clinical application in transnasal examinations of the larynx and hypopharynx.
2：Sample Selection and Data Sources:
Patients with hypopharyngeal and laryngeal disorders were examined between January and December 2010, with 356 transnasal observations performed.
3：List of Experimental Equipment and Materials:
The ENT video endoscope (Pentax VNL-1590 STi), USAF resolution test chart, nasal spray with adrenalin and lidocaine, and digital video recording equipment.
4：Experimental Procedures and Operational Workflow:
Image resolution was estimated using the USAF chart; clinical examinations involved transnasal insertion after nasal pretreatment, with observations recorded digitally.
5：Data Analysis Methods:
Resolution was quantified in line pairs per mm; clinical usability was assessed based on patient tolerance and image quality comparisons.
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