Segmented Hip Joint Surface for Minimally Invasive Insertion

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Solution Overview

Problem

Conventional hip joint replacement surgeries are invasive, require long hospitalization, and have a lengthy recovery period due to the need for large incisions and penetration of the hip joint capsule, leading to potential infection risks and limited functional joint recovery.

Innovation Solution

A medical device comprising two artificial hip joint surface parts that can be connected in situ to form a functional hip joint surface, allowing for less invasive insertion through smaller holes in the pelvic bone, with a locking mechanism to secure the parts in place, enabling a more stable and even surface for weight-bearing movements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a metal prosthesis is placed in Femur and plastic bowl in Acetabulum through lateral incision and penetration of hip joint capsule, then the hip joint can be replaced to treat osteoarthritis, but the surgery requires one week of hospitalization and 6 weeks recovery with limited physical activity

Engineering Contradiction:

Improveeffectiveness of hip joint replacementVSAvoidrecovery period and hospitalization time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The artificial hip joint surface is divided into at least two separate parts that can be inserted independently through smaller holes in the pelvic bone, avoiding the need for large incisions and extensive dissection of surrounding tissues and muscles

Inventive Principle:

Principle #1Segmentation

2Reliability

If conventional hip joint surgery is performed with large incisions and penetration of hip joint capsule, then the hip joint can be accessed for prosthesis placement, but the risk of infection increases and functional joint recovery is limited

Engineering Contradiction:

Improvefunctional recovery of hip jointVSAvoidinfection risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The device is segmented into multiple parts that can be inserted through smaller holes in the pelvic bone, avoiding penetration of the hip joint capsule and reducing exposure to infection risks while maintaining functional recovery

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The multiple parts of the artificial hip joint surface are designed to be nested or stacked within the hip joint space, allowing insertion through small access holes without requiring large incisions or capsule penetration

Inventive Principle:

Principle #7Nested doll (Nesting)

3Ease of operation

If the artificial hip joint surface is made as a single integrated component, then the structure is simple and stable, but it requires large incisions and cannot be inserted through small holes in the pelvic bone

Engineering Contradiction:

Improveinsertion through small holesVSAvoidnumber of parts to be connected

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The artificial hip joint surface is divided into at least two parts that can be inserted separately through small holes in the pelvic bone, enabling minimally invasive insertion while managing device complexity through standardized connection interfaces

Inventive Principle:

Principle #1Segmentation

4Reliability

If the hip joint capsule is penetrated during surgery to access the hip joint, then the prosthesis can be implanted, but the capsule damage makes it difficult to achieve fully functional joint recovery

Engineering Contradiction:

Improvefunctional joint recoveryVSAvoidintegrity of hip joint capsule

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The device is segmented into multiple parts insertable through small holes in the pelvic bone, allowing hip joint replacement without penetrating or damaging the hip joint capsule, thereby preserving capsule integrity and enabling full functional recovery

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20240245518A1Hip joint device and method

Publication Date: 2024.07.25 FORSELL PETER

AI summary

A medical device for treating hip joint osteoarthritis by providing a joint surface is provided. The medical device comprises at least two artificial hip joint surface parts, wherein said at least two artificial hip joint surface parts are adapted to be connected to each other to form an artificial hip joint surface during an operation. Furthermore a method of treating a hip joint of a human patient by providing said the medical device is provided. The hip joint comprising a caput femur and an acetabulum, the method comprises the steps of: cutting the skin of said human patient, dissecting an area of the pelvic bone on the opposite side from said acetabulum, creating a hole in said dissected area, said hole passing through said pelvic bone and into said hip joint of said human patient, and providing said medical device to said hip joint, through said hole in said pelvic bone of said human patient.