Hip Joint Device via Pelvic Bone Access
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Solution Overview
Problem
Current hip joint replacement surgeries often require penetrating the hip joint capsule, leading to prolonged recovery times, increased risk of infection, and strain on the joint, as well as removal of healthy femur bone and large blood vessels, which can result in complications such as blood clots.
Innovation Solution
A surgical and laparoscopic/arthroscopic method that accesses the hip joint through a hole in the pelvic bone, allowing for the placement of an artificial hip joint surface without damaging the hip joint capsule, using techniques like expandable reamers and resorbable materials, and flexible artificial components that can be inserted through smaller openings, reducing tissue disruption and promoting faster recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional hip joint replacement surgery is performed through lateral incision penetrating the hip joint capsule, then access to the joint is achieved, but recovery time is prolonged and risk of infection increases
Solution Approach 1:
The surgical approach is segmented into two separate access points: one through the pelvic bone for inserting the acetabular component, and another through the femur for inserting the femoral component. This segmentation allows the hip joint capsule to remain intact while still enabling replacement of both joint surfaces, thereby reducing infection risk while maintaining surgical accessibility.
Solution Approach 2:
The pelvic bone serves as an intermediary structure that allows access to the acetabulum without penetrating the hip joint capsule. By creating a hole through the pelvic bone opposite to the acetabulum, the surgeon can insert the acetabular cup from the posterior approach, using the bone itself as a mediator to reach the joint surface while preserving the capsule's integrity.
2Ease of operation
If conventional surgery penetrates the hip joint capsule, then joint access is obtained, but healthy femur bone is damaged
Solution Approach 1:
The surgical procedure segments the access routes for the two components of the hip prosthesis. The acetabular component is accessed through the pelvic bone, while the femoral component is accessed through a separate hole in the femur. This segmentation minimizes unnecessary bone removal and preserves healthy femur bone by creating a precise, targeted access point rather than performing extensive soft tissue dissection and capsule penetration.
3Productivity
If conventional surgery is performed, then hip joint replacement is achieved, but recovery time is extended
Solution Approach 1:
The surgical technique performs preliminary actions by creating access holes through the pelvic bone and femur before inserting the prosthetic components. This preliminary bone access eliminates the need for extensive soft tissue dissection and capsule manipulation during the actual component insertion, streamlining the surgical process and reducing overall operative time, which contributes to faster patient recovery.
4Ease of operation
If conventional surgery places strain on large blood vessels, then joint access is achieved, but risk of blood clots increases
Solution Approach 1:
The surgical approach inverts the conventional lateral access method by using a posterior approach through the pelvic bone. Instead of approaching the hip joint from the lateral side where large blood vessels are encountered, the surgeon approaches from the posterior pelvis, creating a hole through the bone opposite to the acetabulum. This inverted approach provides excellent access to the acetabulum while avoiding the large blood vessels in the lateral thigh region, thereby reducing the risk of blood clots.
Data Source
AI summary
A medical device for treating hip joint osteoarthritis in a human patient by providing at least one artificial hip joint surface. The medical device comprises a prosthetic part or a bone plug adapted to be placed in a hole in the pelvic bone and a supporting member connected to said prosthetic part or bone plug, wherein the prosthetic part or the bone plug is adapted to be inserted into said hole from the abdominal side of the acetabulum and oriented, during the insertion, such that the concave interior surface is facing in the direction towards the caput femur. Wherein the medical device comprises an artificial caput femur surface or artificial acetabulum surface, and wherein a largest cross-sectional distance of said artificial caput femur or acetabulum surface is smaller than said hole, such that said artificial caput femur surface can pass through said hole.