Many researchers have tried to develop a device to reduce the contamination during endoscopy processes. A disposable-sheath system was developed to eliminate the contamination during the flexible gastroscopy process [1] and the bronchoscopy process [2]. The irrigation-suction straw sheath system was designed for endoscopic sinus surgery in rhinology due to limited vision, which is caused by the bone dust or blood inside the nose during endonasal process [3]. To avoid contact and minimize contamination between the patient and the bronchoscopist, the single-use sheath was developed [2]. After each bronchoscopy procedure, the installation tube was changed instead of the contaminated sheathed bronchoscope by reapplying the vacuum [2]. Comparison of the results of the cystoscopy process with or without the endosheath system showed that with the endosheath system there was a reduction in contamination and the capability...

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