Hip Joint Surgical Instrument with Segmented Bone Access
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Solution Overview
Problem
Current hip joint surgeries for osteoarthritis are invasive, requiring significant recovery time and risking complications like blood clots due to large incisions and penetration of blood vessels, necessitating a less invasive method for hip joint operations.
Innovation Solution
A medical device with an elongated member and tool fixating member for minimally invasive procedures, allowing force transfer and tool operation through small holes in bones, enabling the placement and fixation of prosthetic parts with reduced tissue damage and faster recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hip replacement surgery is performed with large incisions and penetration of blood vessels, then the hip joint can be accessed and prosthetics can be implanted, but the risk of infection and blood clots increases and recovery time is extended
Solution Approach 1:
The surgical approach is segmented into multiple access points: a first opening in the ilium and a second opening in the femur, allowing the surgical instrument to reach the hip joint through separate pathways rather than a single large incision. This segmentation enables minimally invasive access while maintaining surgical capability
Solution Approach 2:
A surgical instrument acts as an intermediary tool that passes through the first opening in the ilium to create a passage through the hip joint capsule and exits through a second opening in the femur. This intermediary instrument enables precise control and minimizes direct tissue disruption by confining the invasive action to a controlled tool rather than large-scale surgical exposure
2Loss of time
If traditional surgery requires large incisions through fascia and muscles, then the hip joint is accessible, but tissue damage increases and recovery time extends to 6 weeks
Solution Approach 1:
The surgical approach divides the access path into two separate openings (first opening in ilium, second opening in femur) rather than requiring a single large incision through fascia and muscles. This segmentation minimizes disruption to soft tissues while maintaining access to the hip joint
Solution Approach 2:
The surgical approach transitions from a traditional single-plane incision to a three-dimensional pathway through bone structures. By creating openings in both the ilium and femur and passing the instrument through the hip joint capsule, the approach utilizes spatial dimensions to achieve access without extensive soft tissue dissection
3Reliability
If the fibrous capsule is penetrated to access the joint, then the hip joint becomes accessible, but the joint cannot fully recover its function
Solution Approach 1:
The surgical instrument creates a controlled passage through the hip joint capsule as part of the planned surgical pathway. By pre-planning the trajectory through the ilium, joint capsule, and femur, the surgeon can minimize capsule damage while maintaining access. The instrument itself serves as a guide for subsequent prosthetic implantation
Solution Approach 2:
The surgical instrument serves as an intermediary that temporarily passes through the hip joint capsule to enable access without requiring extensive capsule disruption. The instrument confines the invasive action to a controlled pathway, allowing the capsule to heal with minimal damage compared to traditional wide-open surgical approaches
Data Source
AI summary
A medical device for delivering an action to an area of a hip joint or its surroundings, inside a human body, is provided. The hip joint of a patient comprises a collum femur and a ball shaped caput femur, being the proximal parts of the femoral bone, and an acetabulum, being a bowl shaped part of the pelvic bone. The medical device comprising; an elongated member, having a length axis along its elongated distribution, comprising a first portion, adapted to enter the body of the patient, and a mechanical element, adapted to be used during an operation in the hip joint or its surroundings, inside the body. The first portion of the elongated member comprises a holding member adapted to hold the mechanical element inside the body of the patient, wherein the first portion of the elongated member have a first portion cross-section area substantially perpendicular to the length axis of the elongated member. The first portion is adapted to pass through a hole, in a bone of the patient, the hole having a hole cross-section area. The first portion cross-section area, is adapted to be smaller than said hole cross-section area. The mechanical element have a functional status, ready to deliver said action inside said body, when held by the holding member inside the body of the patient. The mechanical element is adapted to have a mechanical element cross-sectional area substantially perpendicular to the length axis of the elongated member, substantially larger than the first portion cross-sectional area and adapted to be unable to pass through the hole, when the mechanical element is in the functional status.