Hip Joint Device With Positioning Shaft For Accurate Prosthetic Placement
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Solution Overview
Problem
Conventional hip joint replacement surgeries are invasive, require extensive recovery time, and pose risks due to the difficulty in accurately placing prosthetic parts within the hip joint, leading to potential errors and limited functional recovery.
Innovation Solution
A medical device and method that utilize a positioning shaft to create holes in the femur and pelvic bone, allowing for the insertion and expansion of prosthetic components through these holes, ensuring accurate placement and minimizing tissue damage, using biocompatible materials and self-lubricating surfaces to facilitate natural hip movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional hip joint replacement surgery is performed through lateral incision and capsule penetration, then access to the joint is achieved, but the hip joint capsule is damaged making full functional recovery difficult
Solution Approach 1:
Instead of accessing the hip joint from the lateral side through capsule penetration, the invention inverts the approach by accessing the joint through the acetabulum from the pelvic side. This reverse approach allows prosthesis placement without damaging the hip joint capsule, preserving its integrity for full functional recovery.
Solution Approach 2:
The invention uses the acetabulum as an intermediary access route to reach the hip joint. By passing through the acetabulum and using a positioning shaft as a mediator, the prosthesis can be implanted without directly penetrating or damaging the hip joint capsule.
2Ease of operation
If prosthesis placement is performed through lateral approach with limited reach and visibility, then surgery can be performed, but placement accuracy is difficult and time-consuming with numerous error possibilities
Solution Approach 1:
The positioning shaft serves as an intermediary tool that provides precise guidance for prosthesis placement. It establishes accurate positioning references and enables controlled insertion, eliminating the visibility and reach limitations of the lateral approach while ensuring high placement accuracy.
Solution Approach 2:
The positioning shaft is inserted and established as a reference before the actual prosthesis placement. This preliminary action creates accurate positioning guides and alignment references, ensuring precise prosthesis placement without the errors associated with direct lateral insertion.
3Ease of manufacture
If extensive surgical intervention is performed for hip joint replacement, then prosthesis can be implanted, but hospitalization and recovery time are increased with infection risks
Solution Approach 1:
By inverting the surgical approach to access the hip joint through the acetabulum rather than lateral incision, the procedure becomes less invasive. The hip joint capsule remains intact, reducing surgical trauma, lowering infection risks, and enabling faster recovery and shorter hospitalization while still achieving successful prosthesis implantation.
Data Source
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AI summary
An implantable medical device for implantation in a hip joint of a human patient is provided. The medical device comprises: at least one artificial hip joint surface adapted to replace at least the surface of at least one of the caput femur and acetabulum. At least one artificial hip joint surface comprises: a positioning hole with at least one opening in said at least one artificial hip joint surface. The hole is adapted to be placed and dimensioned such that the medical device is adapted to be fitted using a positioning shaft and at least partly surround the shaft, for positioning the at least one artificial hip joint surface in a desired position in the hip joint. The hole is adapted to be fitted using the positioning shaft, when the shaft is stabilized and placed in at least one of the femoral bone and the pelvic bone for positioning said medical device inside the hip joint.