Articulated Medical Puncturing Device for Deep Joint Access
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Solution Overview
Problem
Existing medical puncturing devices struggle to access and repair defects in joints, particularly in the knee joint, due to their rigid and rectilinear design, which makes it difficult to reach deep and inaccessible locations without causing excessive trauma or requiring extreme joint manipulation.
Innovation Solution
A puncturing device with a shaft and a tool carrier connected via a freely articulated joint, allowing the tool carrier to pivot up to 45°, enabling the tool to be oriented parallel to the bone surface for optimal cutting or penetration, and a stop limiting the pivoting movement to ensure force is applied perpendicular to the bone surface, facilitating access to deep joint locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rigid and rectilinear puncturing device is used, then the structure is simple and easy to manufacture, but it cannot access deep joint locations without causing excessive trauma or requiring extreme joint manipulation
Solution Approach 1:
The puncturing device incorporates a freely articulated joint between the shaft and tool carrier, allowing the tool carrier to pivot from a coaxial orientation to a laterally pivoted orientation with the shaft. This dynamic adjustment enables the device to adapt to deep joint locations while maintaining structural simplicity, resolving the contradiction between accessibility and device complexity.
2Adaptability or versatility
If the tool carrier is made freely pivotable, then accessibility to difficult-to-reach locations is improved, but control over the puncturing force direction becomes challenging
Solution Approach 1:
A stop mechanism is introduced as an intermediary element to limit the lateral pivoting movement of the tool carrier to a maximum angle of 45°. This stop ensures that while the tool carrier can pivot to reach difficult locations, the puncturing force remains controlled and directed appropriately, preventing excessive deviation that would compromise cut precision.
3Length of moving object
If the shaft is extended to reach deep joint locations, then accessibility is improved, but the device becomes more difficult to manipulate and requires extreme joint manipulation
Solution Approach 1:
The puncturing device is segmented into a shaft and a tool carrier connected by a freely articulated joint. This segmentation allows the tool carrier to be positioned independently at deep joint locations through pivoting, eliminating the need to extend the entire shaft and manipulate the joint to extreme degrees, thereby improving ease of operation.
4Adaptability or versatility
If the tool carrier pivots at large angles, then accessibility to deep locations is improved, but the force applied is no longer perpendicular to the bone surface
Solution Approach 1:
The freely articulated joint enables dynamic pivoting of the tool carrier to reach deep locations, while the stop mechanism dynamically limits the pivoting angle to a maximum of 45°. This dynamic control ensures that the tool carrier can adapt to deep locations while maintaining force application accuracy within acceptable limits.
Data Source
AI summary
A medical puncturing serves for penetrating into a bone or a cartilage. It has a shaft and a tool carrier connected with its proximal end to a distal end of the shaft. The tool carrier has a puncturing tool being a punch or a multi-fracture chisel. The tool carrier is connected at its proximal end via a freely articulated joint to the distal end of said shaft. A stop limits a laterally pivoting movement of said tool carrier to a maximum angle of 45°.