Hip Joint Resurfacing 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 damage to healthy femur bone, as well as strain on large blood vessels, which can result in complications such as blood clots.

Innovation Solution

A surgical and laparoscopic/arthroscopic method that involves creating a hole in the pelvic bone to access the hip joint without penetrating the hip joint capsule, allowing for the insertion of an artificial hip joint surface through this hole, which can be fixed using mechanical or adhesive methods, and potentially using a mould or fluid to create the joint surface, thereby minimizing tissue damage and reducing recovery time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the hip joint capsule is penetrated to access the hip joint, then the joint can be operated on, but the recovery time increases and the risk of infection increases

Engineering Contradiction:

Improveaccess to hip jointVSAvoidrisk of infection

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The surgical approach is segmented into two separate access points: one through the pelvic bone for inserting the prosthesis, and another through the hip joint capsule for removing the femoral head. This segmentation allows the capsule to remain intact for infection prevention while still enabling complete joint access for surgery

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pelvic bone serves as an intermediary structure that provides access to the hip joint without requiring penetration of the hip joint capsule. By creating a hole through the pelvic bone, the surgeon can insert prosthetic components and access the joint space while the capsule remains intact as a protective barrier

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the hip joint capsule is penetrated to access the hip joint, then the joint can be operated on, but the recovery time is prolonged

Engineering Contradiction:

Improveaccess to hip jointVSAvoidrecovery time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The surgical approach is segmented into two separate access points: one through the pelvic bone for inserting the prosthesis, and another through the hip joint capsule for removing the femoral head. This segmentation allows the capsule to remain intact for faster recovery while still enabling complete joint access for surgery

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The femoral head is removed through a separate small incision before the main prosthesis insertion procedure. This preliminary action simplifies the main surgical step and reduces the complexity and duration of the primary operation, contributing to shorter recovery time

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If conventional surgery is used to access the hip joint, then the joint can be operated on, but healthy femur bone is removed

Engineering Contradiction:

Improveaccess to hip jointVSAvoidhealthy femur bone

Core Design Contradiction:

Ease of operationVSLoss of substance

Solution Approach 1:

The femoral head is extracted through a separate small incision using a specialized instrument, allowing removal of the damaged bone without requiring extensive removal of healthy femur bone. This extraction approach preserves maximum healthy bone tissue while still achieving the goal of removing the femoral head for prosthesis insertion

Inventive Principle:

Principle #2Taking out (Extraction)

4Ease of operation

If conventional surgery is used to access the hip joint, then the joint can be operated on, but large blood vessels are strained increasing risk of blood clots

Engineering Contradiction:

Improveaccess to hip jointVSAvoidrisk of blood clots

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The surgical approach is segmented into two separate access points with different incision locations. The pelvic bone access point is positioned to avoid major blood vessels, and the small capsule incision is made in a location that minimizes vascular disruption. This segmented approach reduces strain on large blood vessels compared to a single large lateral incision

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of making a large lateral incision and working inward, the approach inverts the sequence by first creating a small targeted incision for femoral head removal, then accessing the joint through the pelvic bone. This inverted approach minimizes disruption to blood vessels and surrounding tissues

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS11491015B2Hip joint method

Publication Date: 2022.11.08 FORSELL PETER MATS

AI summary

A surgical or arthroscopic method for resurfacing at least one surface of a hip joint of a human patient, using a medical device comprising an artificial hip joint surface, wherein the hip joint surface comprising an acetabulum surface and a caput femur surface, said method comprising the steps of: creating at least one hole passing into the hip joint, dissecting and preparing the hip joint, introducing at least one artificial hip joint surface, comprising at least one of an artificial acetabulum surface and an artificial caput femur surface, wherein said at least one artificial hip joint surface, comprising a first sealing member, creating a sealed hollow space between said first sealing member and one of the acetabulum surface or said artificial acetabulum surface and one of the caput femur surface or said artificial caput femur surface, selecting at least one artificial hip joint surface and injecting a material into said hollow space.