Grooved Medical Cutting Instrument with Diagonal Knife
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Solution Overview
Problem
Existing medical cutting instruments for muscles and tendons are complex in structure and operation, making them difficult to use effectively for precise and secure cutting.
Innovation Solution
A medical cutting instrument with a grooved instrument body that guides tissue to be cut, featuring a cutting knife aligned diagonally and adjustable to allow for various cutting depths, simplifying the cutting process without additional guide mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a guide ring with opening mechanism and blocking mechanism is used, then precise preparation of muscle/tendon implant is achieved, but structure and operation become highly complex
Solution Approach 1:
The patent removes the guide ring, opening mechanism, and blocking mechanism from the instrument body. Instead, the cutting knife itself is designed with an integrated guide structure that directly guides the muscle/tendon tissue, eliminating the need for separate guiding components and simplifying the overall device structure while maintaining cutting precision
Solution Approach 2:
The patent combines the guiding function and cutting function into a single integrated cutting knife structure. The guide flanks are directly formed as part of the cutting knife body, merging what were previously separate functions (guiding by guide ring + cutting by knife) into one unified component, thereby reducing structural complexity
2Ease of operation
If a slidable opening mechanism is used, then cutting function is achieved, but operation becomes complex
Solution Approach 1:
The patent eliminates the slidable opening mechanism entirely. The cutting knife is designed with fixed guide flanks that directly engage and guide the tissue, removing the need for complex sliding actuation mechanisms while maintaining ease of operation through direct tissue engagement
Solution Approach 2:
The cutting knife structure itself provides the guiding function through its geometric design (guide flanks), eliminating the need for separate actuation mechanisms. The tissue is guided by the inherent geometry of the cutting edge rather than by an active mechanical system
Data Source
AI summary
A medical cutting instrument for cutting muscles and tendons, with an instrument body that includes a handle on its proximal end and at least one cutting knife in the area of its distal end. To provide a medical cutting instrument that guarantees ease of handling and simple structure along with secure cutting of the muscle/tendon tissue, the instrument body should be of grooved configuration in the area of its cutting knife in such a way that the instrument body includes a hollow space extending in the longitudinal direction of the instrument body to receive and guide the muscle/tendon tissue that is to be cut, such that the instrument body includes an opening extending in the longitudinal direction of the instrument body and the cutting knife constitutes a side of the instrument body.