Trans-pelvic Hip Prosthesis for Capsule-Sparing Osteoarthritis Treatment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current hip joint replacement surgeries for osteoarthritis often require penetrating the Fibrous Capsule, leading to prolonged recovery times and increased risks of infection due to the need for large incisions and manipulation of healthy bone and blood vessels.
Innovation Solution
A medical device with adjustable artificial hip joint surfaces that can be inserted through a smaller hole in the pelvic bone, sparing the Fibrous Capsule and reducing the need for extensive bone removal, allowing for direct or indirect contact with the pelvic bone using biocompatible materials and supporting members to distribute load effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional hip joint replacement surgery is performed with large incisions and penetration of the Fibrous Capsule, then access to the joint is achieved and prosthesis can be implanted, but recovery time is prolonged and risk of infection increases
Solution Approach 1:
The prosthesis is divided into two separate components: an acetabular prosthesis implanted in the pelvic bone and a femoral prosthesis implanted in the femur. This segmentation allows each component to be accessed and implanted through separate smaller incisions, avoiding the need for large incisions and capsule penetration required in traditional single-stage replacement surgery
Solution Approach 2:
The acetabular prosthesis is implanted through the pelvic bone from the opposite side from the acetabulum, utilizing a trans-pelvic approach. This dimensional change in surgical access allows placement of the acetabular component without penetrating the hip joint capsule, thereby reducing surgical trauma and recovery time
2Ease of operation
If traditional hip joint replacement surgery is performed with large incisions, then access to the joint is achieved, but risk of infection and blood clots increases
Solution Approach 1:
By segmenting the replacement into separate acetabular and femoral components that can be implanted through separate smaller incisions, the surgical approach minimizes disruption to blood vessels and the Fibrous Capsule, thereby reducing the risk of infection and blood clot formation associated with large incisions
Solution Approach 2:
The trans-pelvic implantation approach for the acetabular prosthesis creates a new surgical dimension that bypasses the hip joint capsule and surrounding vasculature, reducing exposure of large blood vessels and minimizing the risk of thromboembolic complications
3Ease of manufacture
If extensive bone removal is performed in traditional hip joint replacement, then prosthesis placement is achieved, but healthy Femur bone is lost and surgical trauma increases
Solution Approach 1:
The segmented prosthesis design allows the acetabular and femoral components to be prepared and implanted separately, enabling more conservative bone preparation for each component and preserving healthy bone that would otherwise be removed in traditional en bloc replacement procedures
Solution Approach 2:
The trans-pelvic approach to acetabular prosthesis implantation accesses the acetabulum through the pelvic bone rather than through the femur, eliminating the need for extensive femoral bone removal and preserving healthy femoral structure
Data Source
AI summary
The invention relates to a method for treating hip joint osteoarthritis with a medical device having a prosthetic part adapted to function as an articulating surface comprising a center axis generally coinciding with the acetabulum and the caput femur center axis when implanted. The method further comprises placing the prosthetic part in a through-going hole in the pelvic bone from the side opposite a concave portion of the acetabulum of the human patient, displacing at least one displaceable protruding supporting member connected to said prosthetic part such that the at least one displaceable protruding supporting member is configured to transfer load from the prosthetic part via the displaceable connection to the pelvic bone when being displaced relative said prosthetic part in a direction more perpendicular than parallel to the prosthetic part's center axis and being implanted.