Medical Cutting Instrument Guided Jaw Segmentation
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Solution Overview
Problem
Existing medical cutting instruments fail to provide controlled severing and secure holding of muscle/tendon tissue, especially in arthroscopic surgeries where precise cutting and prevention of tissue retraction are critical.
Innovation Solution
A medical cutting instrument with guided jaw members and toothed clamping surfaces oriented diagonally, allowing secure grip and alignment of tissue, combined with a cutting edge configuration for precise severing and a mechanism for variable cutting depth adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cutting device is mounted in the center of the clamping surfaces of the jaw members, then the tool can simultaneously sever and hold tissue, but the arrangement does not allow controlled severing of muscle and tendon tissue
Solution Approach 1:
The tool is divided into functionally distinct components: a cutting edge portion and clamping surfaces positioned at different locations along the jaw members. This segmentation allows the cutting and clamping functions to operate independently with optimal geometric arrangements, enabling both simultaneous operation and precise controlled severing of tissue.
2Manufacturing precision
If guides are configured in both jaw members for controlling insertion of tissue, then alignment precision is improved, but device complexity increases
Solution Approach 1:
Guides are configured only in the other (stationary) jaw member rather than in both jaw members. This localized approach provides sufficient tissue alignment and insertion control while avoiding the increased complexity that would result from duplicating guide structures in both movable and stationary jaw members.
3Reliability
If clamping surfaces are configured as toothed connections oriented diagonally, then secure grip and lateral safety are improved, but manufacturing complexity increases
Solution Approach 1:
The clamping surfaces are configured as toothed connections with diagonal orientation rather than symmetric vertical or horizontal arrangements. This asymmetric diagonal configuration optimizes the mechanical interlocking and friction characteristics to provide superior secure grip and lateral safety against tissue slippage, while the regular repeating pattern of teeth maintains reasonable manufacturability.
Data Source
AI summary
A medical cutting instrument for cutting muscles and tendons, having a shaft on whose distal end a tool is mounted consisting of two jaw members, such that at least one jaw member can move with respect to the other jaw member, and on whose proximal end a handle is mounted, such that the movable jaw member and the handle operatively interact with one another by way of an actuation element mounted in the shaft in such a way that the movable jaw member can be shifted between a closed position and an opened position of the tool by actuating the handle and whereby the tool is configured for simultaneous severing and holding of one end of the severed muscle/tendon tissue. At least in the other jaw member, a guide is configured for controlled insertion of the muscle/tendon tissue that is to be severed.