Hip Joint Device Posterior Capsule-Sparing Insertion
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Solution Overview
Problem
Conventional hip joint replacement surgeries for osteoarthritis often require penetrating the Fibrous Capsule, leading to prolonged recovery times and increased risks of infection and blood clots due to the need for extensive incisions and bone modifications.
Innovation Solution
A medical device with an artificial hip joint surface that can be inserted through a hole in the pelvic bone, sparing the Fibrous Capsule and using a supporting member to transfer load to the pelvic bone, potentially reducing recovery time and infection risk by minimizing tissue disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hip joint replacement surgery is performed with lateral incision and Fibrous Capsule penetration, then the hip joint can be accessed and prosthesis can be implanted, but the recovery time is prolonged and the risk of infection and blood clots increases
Solution Approach 1:
The patent inverts the conventional surgical approach by accessing the hip joint from the posterior side rather than the lateral side, and by preserving the Fibrous Capsule instead of penetrating it. This inversion of the surgical pathway allows prosthesis implantation without compromising the capsular integrity, thereby reducing recovery time and complication risks while maintaining the ability to perform the replacement surgery effectively
2Strength
If extensive bone modification is performed in conventional surgery, then the prosthesis can be securely implanted, but healthy Femur bone is removed and tissue damage occurs
Solution Approach 1:
The patent extracts only the necessary portions of bone required for prosthesis fixation while preserving the majority of healthy bone tissue. By selectively removing minimal bone material and avoiding extensive modifications, the surgery achieves secure prosthesis implantation while conserving healthy bone stock, thereby reducing the loss of substance parameter
3Ease of operation
If the Fibrous Capsule is penetrated during surgery, then access to the joint is achieved, but the capsule cannot fully heal and joint function is compromised
Solution Approach 1:
The patent inverts the surgical approach to access the hip joint from the posterior side, allowing surgeons to perform the procedure without penetrating the Fibrous Capsule. This alternative access route maintains capsular integrity, enabling the capsule to heal fully and preserve joint functionality, while still providing adequate surgical access for prosthesis implantation
Data Source
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AI summary
A medical device for treating hip joint osteoarthritis in a human patient by providing at least one artificial hip joint surface is provided. The medical device is adapted to be inserted through a hole in said pelvic bone from the opposite side from said acetabulum, to be in contact with said pelvic bone, and to transfer a load from said medical device to said pelvic bone through said contact with said pelvic bone. Furthermore a medical device for treating osteoarthritis by providing a joint surface is provided, wherein said medical device comprises an artificial acetabulum surface having a largest diameter. The artificial acetabulum surface is adapted to be inserted through a hole in the pelvic bone from the opposite side from acetabulum of a human patient for providing said joint surface, the artificial acetabulum surface comprises at least one supporting member. The at least one supporting member is adapted to be in connection with the pelvic bone after insertion through said hole in the pelvic bone, and carry the load placed on caput femur from the weight of said human patient by the connection with the pelvic bone after insertion through said hole in the pelvic bone.