Segmented Bone Cement Extractor for Safe Removal
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Solution Overview
Problem
The removal of surgical bone cement from bone cavities is difficult and often results in damage to the bone and surrounding tissue, with existing methods risking inflammation and trauma due to the dislodgment of cement fragments.
Innovation Solution
A bone cement extractor with a segmented assembly that includes a connection body and a quick connect mechanism, allowing for the mechanical snap-fitting of inner and outer segments, which are movable between extended and contracted positions, facilitating the safe and efficient removal of cement by breaking and lifting sections using a slide hammer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If common techniques are used to remove bone cement, then cement removal is achieved, but bone and surrounding tissue are damaged
Solution Approach 1:
The extractor is divided into multiple segments that can be extended and contracted independently. The segmented design allows the extractor to break cement into smaller pieces while distributing the mechanical stress along multiple segments, preventing concentrated damage to bone and tissue. Each segment can be extended to engage with cement and then contracted to pull it out, enabling progressive removal without sudden force spikes that would harm surrounding structures.
2Productivity
If cement is removed using traditional methods, then cement extraction is achieved, but cement fragments are dislodged causing inflammation and infection
Solution Approach 1:
The extractor is specifically designed to extract and remove cement fragments systematically from the bone cavity. The segmented structure allows each segment to be extended to reach into the bone and contract to pull out cement, extracting fragments before they can be dislodged and cause harm. The controlled extraction mechanism ensures cement is removed in an organized manner rather than being suddenly dislodged in large fragments.
3Device complexity
If a single-piece extractor is used, then device simplicity is maintained, but cement removal is difficult and time-consuming
Solution Approach 1:
The extractor transitions from a static single-piece design to a dynamic segmented structure that can change its configuration. The segments can be extended to engage with cement and contracted to pull it out, allowing the device to adapt its shape and size during operation. This dynamic capability enables more effective cement engagement and removal without requiring a completely complex multi-component system, as the segments are connected in a way that allows coordinated movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the safe and quick removal of bone cement while minimizing damage to the bone and surrounding tissue, reducing trauma and inflammation by breaking cement into manageable pieces for easy extraction.
Implementation Method 1
expanding segments of the bone extractor by using the slide hammer to break and lift sections of bone cement
Data Source
AI summary
A bone cement extractor for extracting cement from a bone cavity comprising a connection body and a segmented assembly. The connection body has a quick connect for connecting to a working tool. The segmented assembly is attachable to a distal end of the connection body and includes an inner segment having a proximal end and a distal end, the proximal end connectable to the distal end of the connection body, and an outer segment having a proximal end and a distal end, the outer segment slidably connectable to the inner segment.