Reciprocating Serrated Blade for Precise Tissue Dissection
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Solution Overview
Problem
Existing medical devices like scissors and RF cutters face challenges in grasping tissues, performing fine dissections, and providing visibility and control during tissue cutting, with scissors causing tissue slippage and RF cutters lacking visible electrode tips and depth indicators.
Innovation Solution
A medical device with a shaft, a fixed first blade, and a reciprocating second blade configured for parallel motion, featuring serrated edges and indicators for tissue penetration, along with a handle for controlled cutting, and optional features like a camera, light source, and motor for enhanced visibility and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scissors are used to cut tissue, then the cutting function is provided, but the tissue cannot be grasped securely and may slide off during use
Solution Approach 1:
The patent combines the tissue grasping function and cutting function into a single integrated device. The jaws with serrated surfaces provide secure grasping while the blade provides cutting, eliminating the need for separate grasping and cutting tools and ensuring the tissue remains securely held during the cutting process
2Manufacturing precision
If scissors with long continuous blades are used, then cutting capability is provided, but fine dissection of tissues cannot be performed in a controlled manner
Solution Approach 1:
The patent segments the blade into a smaller, more maneuverable size compared to traditional long scissor blades. This segmented approach allows for precise fine dissection work in confined spaces while maintaining effective cutting capability through the serrated jaw surfaces
3Reliability
If RF cutters with electrode tips are used, then cutting energy is delivered, but the electrode tip is not visible from camera point-of-view during cutting
Solution Approach 1:
The patent replaces the invisible RF electrode tip with a visible mechanical blade system. The blade and serrated jaws provide mechanical cutting action that can be directly visualized in the surgical field, eliminating the visibility problem associated with RF electrode tips while maintaining effective tissue cutting capability
4Reliability
If RF cutters are used, then cutting function is provided, but the user cannot tell how much tissue is being cut
Solution Approach 1:
The patent incorporates visual indicators on the blade or jaws that change or provide visual feedback corresponding to tissue penetration depth. This allows the user to clearly see how much tissue is being cut or has been cut, providing precise measurement feedback during the surgical procedure
Data Source
AI summary
A medical device includes a shaft having a distal end, a proximal end, and a shaft body extending between the distal end and the proximal end, the shaft body having a longitudinal axis; a first blade fixedly coupled to the distal end of the shaft, wherein the first blade has a first rectilinear planar surface; a second blade in contact with the first blade, wherein the second blade has a second rectilinear planar surface, and wherein the second blade is configured to move in a reciprocating manner in opposite directions that are parallel to the longitudinal axis of the shaft body; and a handle coupled to the proximal end of the shaft; wherein the shaft, the first blade, and the second blade are sized for insertion into a patient.