Gripping Forceps Convex Jaw for Parallel Tissue Access
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Solution Overview
Problem
Existing gripping forceps struggle to reliably grip the mucous membrane layer and muscle layer at the circumferential edge of a resection hole, particularly when the approaching direction of the medical stapler is nearly parallel to the stomach wall, leading to insufficient suturing.
Innovation Solution
The gripping forceps feature a sheath with a rod extending in a longitudinal direction, a first jaw coupled to the proximal end side of the rod, and a second jaw on the opposite side of the rod, with a distal end portion including a first convex portion protruding towards the first jaw, allowing for effective gripping of the mucous membrane layer and muscle layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the medical stapler approaches the resection hole in a direction nearly parallel to the stomach wall, then the stapler can access the treatment site, but the gripping forceps cannot reliably grip the mucous membrane layer and muscle layer
Solution Approach 1:
The rod's distal end portion is equipped with a first convex portion that protrudes toward the first jaw, creating a localized structural feature specifically designed to engage with and grip the mucous membrane layer and muscle layer at the circumferential edge of the resection hole, thereby improving gripping reliability in challenging approaches
Solution Approach 2:
The convex portion adds a protruding element in the radial dimension from the rod axis, creating a multi-dimensional gripping interface that can effectively engage tissue layers even when the stapler approaches parallel to the stomach wall, transforming a two-dimensional contact into a three-dimensional engagement
Data Source
AI summary
Gripping forceps according to the present invention include a sheath which extends in a longitudinal direction; and a gripping portion which has a rod provided at a distal end of the sheath and extending in the longitudinal direction, a first jaw coupled to a proximal end side of the rod and being opened and closed toward a distal end side of the rod, and a second jaw coupled to the proximal end side of the rod on a side opposite to the first jaw with the rod sandwiched therebetween and being opened and closed toward the distal end side of the rod. The rod has a distal end portion which includes a first convex portion protruding to a first protrusion side toward the first jaw.