Abstract
The J-through, new disposable biopsy forceps for transnasal endoscopy could be relatively readily passed through the curved portion of the scope even when it was in the maximum up-angle state. In addition, when the forceps were withdrawn, the resistance value during their passage through the curved portion was low. The J-through is characterized by marked flexibility of the 25-mm portion from its tip, particularly the cup-wire connection area, and its favorable passage may have been due to this structure. In addition, the amount of tissue that could be collected using this instrument was adequate for histological diagnosis. These results suggest that J-through is an appropriate disposable biopsy forceps for transnasal endoscopy that shows excellent passage through the forceps channel, and reduces the load on the forceps channel caused by forceps withdrawal and insertion. The clinical application of this instrument can be expected.
