Hip Joint Prosthetic via Pelvic Bone Insertion
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Solution Overview
Problem
Current hip joint replacement surgeries for osteoarthritis often require penetrating the Fibrous Capsule, leading to prolonged recovery times and increased risk of infection due to the need for large incisions and extensive tissue disruption.
Innovation Solution
A medical device that allows for the insertion of an artificial hip joint surface through a smaller hole in the pelvic bone, sparing the Fibrous Capsule and utilizing adjustable components to fit the natural joint surfaces, thereby reducing tissue damage and promoting quicker recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional hip joint replacement surgery is performed through a lateral incision penetrating the Fibrous Capsule, then access to the joint is achieved and the prosthesis can be implanted, but the recovery time is prolonged and the risk of infection increases
Solution Approach 1:
The surgical approach is segmented into two separate access paths: one for inserting the acetabular component through the pelvic bone from the opposite side, and another for inserting the femoral component through the femur. This segmentation allows the Fibrous Capsule to remain intact while still achieving access to both joint surfaces for prosthesis implantation
Solution Approach 2:
The pelvic bone serves as an intermediary structure that allows access to the acetabulum without penetrating the Fibrous Capsule. By drilling a hole through the pelvic bone from the opposite side and passing the acetabular prosthesis through this hole, the capsule remains intact while the prosthesis is successfully implanted
2Ease of operation
If a traditional hip joint replacement surgery is performed with large incisions, then the prosthesis can be implanted, but the risk of infection and blood clots increases
Solution Approach 1:
The surgical procedure is divided into separate insertion paths for the acetabular and femoral components, allowing each to be inserted through smaller, more controlled openings. The acetabular prosthesis is inserted through a hole in the pelvic bone, and the femoral prosthesis is inserted through the femur, both avoiding large lateral incisions that would increase infection and clot risk
Solution Approach 2:
The Fibrous Capsule, as a thin film structure, is preserved intact by using alternative access paths through the bone. This preserves the protective barrier function of the capsule while still allowing prosthesis implantation through bone holes that can be made smaller and more controlled
3Ease of operation
If the Fibrous Capsule is penetrated during surgery, then access to the joint is achieved, but the joint integrity is compromised and recovery is delayed
Solution Approach 1:
The access path is segmented to go through the pelvic bone rather than through the Fibrous Capsule. The acetabular prosthesis is inserted through a hole drilled in the pelvic bone from the opposite side, allowing the capsule to remain intact and preserve joint integrity while still achieving the necessary access for implantation
Solution Approach 2:
Instead of accessing the acetabulum from the lateral side through the capsule, the approach is inverted by accessing it from the opposite side through the pelvic bone. This reverse approach allows capsule preservation while achieving the same surgical goal
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
This approach minimizes tissue disruption, potentially shortening recovery time and reducing the risk of complications such as blood clots by allowing for a less invasive procedure that maintains the integrity of the hip joint capsule.
Implementation Method 1
The medical device has a largest diameter which is adapted to be changed during an operation... The construction could comprises at least one slit, at least one elastic member or elastic part
Data Source
AI summary
The invention relates to a medical device for treating hip joint osteoarthritis in a human patient by providing at least one artificial hip joint surface, the hip joint comprising a natural acetabulum, being a part of the pelvic bone, and a caput femur being a part of the femoral bone, and having a partly spherical form having a largest diameter, wherein said medical device comprises: a prosthetic part or a bone plug configured to be placed in a hole created in the pelvic bone. The invention is characterized in that said medical device further comprises a supporting member connected to said prosthetic part or bone plug. The supporting member is configured to be inserted into said hole from the abdominal side of the acetabulum, and be placed in contact with the bone surrounding the hole on the acetabulum side of the pelvic bone, for carrying load placed on caput femur from the weight of said human patient. Further, the prosthetic part or a bone plug has a diameter not exceeding the diameter of the natural acetabulum.