Modular Surgical Tool Head for Minimally Invasive Prosthesis Removal
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Solution Overview
Problem
Current surgical tools for inserting and removing joint prostheses are limited in versatility, often specific to one type of prosthesis and require complex positioning and high forces, making minimally invasive procedures challenging and potentially damaging to surrounding tissue.
Innovation Solution
A modular surgical tool with a tool head and operating part that allows for remote operation of clamping jaws, enabling targeted axial momentum for secure clamping and removal of prostheses without protruding elements, facilitating minimally invasive procedures and adaptability to various prosthetic designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If high forces are applied to knock out the prosthesis, then the prosthesis can be removed from the bone, but surrounding tissue may be damaged
Solution Approach 1:
The tool head acts as an intermediary between the operating part and the prosthesis. It transmits the knockout force from the operating part to the prosthesis shaft/neck while protecting surrounding tissue. The tool head's clamping jaws securely grip the prosthesis, ensuring force is applied only to the intended target and not to surrounding bone or soft tissue.
Solution Approach 2:
The tool head concentrates the knockout force locally at the contact point with the prosthesis shaft/neck. The clamping jaws are designed to apply force precisely where needed - on the prosthesis surface - while the tool body protects surrounding areas. This localized force application allows effective prosthesis removal without damaging adjacent tissue.
2Ease of operation
If the tool is designed for specific prosthesis types, then it can provide precise control, but it reduces versatility across different prosthesis designs
Solution Approach 1:
The tool is designed with universal adaptability to work with different prosthesis types (hip, knee, shoulder) and designs. The tool head can be configured with different clamping jaw arrangements to accommodate various prosthesis geometries. The operating part connects to different tool heads, allowing the same basic tool to perform multiple functions across different surgical applications.
Solution Approach 2:
The tool is divided into separate modular components: an operating part and a tool head with clamping jaws. This segmentation allows the tool head to be adapted or replaced for different prosthesis types while maintaining the same operating mechanism. The modular design enables versatility without compromising the precision control provided by the operating part.
3Ease of operation
If operating elements are placed on the tool head, then direct control is achieved, but minimally invasive access is compromised
Solution Approach 1:
The tool head serves as an intermediary that transmits control forces from the operating part to the prosthesis. The operating elements (screws, levers) are located on the operating part, which is manipulated outside the surgical site. The tool head receives these forces and applies them to the prosthesis through clamping jaws, eliminating the need for protruding operating elements at the surgical site and enabling minimally invasive access.
Data Source
AI summary
A tool head for a surgical tool for knockout and/or insertion of prostheses is disclosed, comprising a tool body (10, 11, 12) having at least two clamping jaws (14, 14a, 14b, 14c, 15, 15a, 15b, 41) for clamping a prosthetic part, wherein at least one of the clamping jaws is mounted to be movable in relation to the tool body (10, 11, 12); wherein at least one of the movable clamping jaws has at least one pressure area (16), which is arranged so that applying a pressure to the pressure area (16) of the at least one clamping jaw causes a movement of the clamping jaws (14, 14a, 14b, 14c, 15, 15a, 15b, 41) toward one another or away from one another, to thereby clamp the prosthetic part between the holding areas of the clamping jaws.