Bone Preparation Device With Powered Soft-Tissue Removal
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Solution Overview
Problem
Conventional bone preparation processes are inefficient and inconsistent, requiring manual removal of ligaments and soft tissue, which can lead to glove tearing, contamination risks, and inconsistent bone fragment quality due to agglutination and agglomeration issues.
Innovation Solution
A modular system with a reusable base module and disposable preparation module, featuring a resiliently deformable carriage and removal element, such as a fluted screw, that automates the removal of soft tissue from bone stock, ensuring consistent and sterile preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual removal of ligaments and soft tissue is performed using curettes and rongeurs, then the process can be completed with simple tools, but it takes 15 minutes or more and risks glove tearing and bone contamination
Solution Approach 1:
The patent replaces manual mechanical tools (curettes and rongeurs) with a powered mechanical system featuring a rotatable cutter head with cutting blades. This automated mechanical system performs soft tissue removal much faster than manual tools while maintaining sterile conditions through consistent, controlled operation that does not require firm grasping of the bone stock.
Solution Approach 2:
The cutter head is designed to automatically engage and remove soft tissue as the bone stock is positioned against it. The system serves itself by using the rotation and cutting action to progressively剥离 soft tissue without requiring continuous manual manipulation or adjustment by surgical personnel.
2Force
If firm grasping force is exerted on the bone stock during manual preparation, then the bone can be held steady for cutting, but the gloves may tear and contamination risk increases
Solution Approach 1:
The patent replaces the need for firm manual grasping with a mechanical clamping or positioning mechanism that secures the bone stock against the cutter head. This eliminates the direct transmission of high forces through gloves to the bone, removing the risk of glove tearing while maintaining stable positioning for consistent cutting.
3Productivity
If mechanized bone preparing processes are used, then efficiency is improved, but inconsistent results occur due to bone stock agglutination and agglomeration
Solution Approach 1:
The patent applies local quality by using a cutter head with specifically designed cutting blades positioned to engage only the soft tissue portions of the bone stock. The cutting action is localized to the interface between the cutter head and bone stock surface, allowing precise removal of soft tissue while leaving the bone structure intact and homogeneous, preventing agglutination and agglomeration issues.
Data Source
AI summary
An assembly for preparing bone stock includes a shell comprising a base having a support surface, and a lid. The base and lid have a void space therebetween. A carriage is disposed at least partially within the void space, and moveable across the support surface. The carriage comprises a wall, at least a portion of which is resiliently deformable. The wall cooperates with the base to define a preparation chamber, and a removal element configured to remove soft tissue from the bone stock is disposed at least partially therein. The resilient portion of the wall is configured to deform when bone stock is positioned between the removal element and the wall. The carriage is configured to receive power from a drive train to actuate movement of the carriage across the support surface, and the removal element is also configured to receive power from the drive train.