Ergonomic Acetabular Cup Inserter with Rotating Handle
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Solution Overview
Problem
Current acetabular cup inserters used in total hip replacement surgeries are structurally complex, leading to ergonomic difficulties for medical personnel during acetabular cup implantation.
Innovation Solution
A surgical instrument comprising an acetabular cup with a hole, a shell body with a handle and extension portion, and a drive shaft with a drive rod and handle bar that allows for angular displacement to easily position and secure the acetabular cup, enabling one-handed operation and ergonomic handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional acetabular cup inserters are used, then the acetabular cup can be implanted, but the instrument structure becomes too complex to handle easily
Solution Approach 1:
The surgical instrument is divided into distinct functional modules: a handlebar for operator control, a drive shaft for power transmission, a drive rod for actuation, and an extension portion for cup engagement. This segmentation allows each component to perform its specific function independently, simplifying the overall structure while maintaining implantation capability.
Solution Approach 2:
The invention extracts and eliminates unnecessary intermediate components from traditional inserters. The direct mechanical connection between the handlebar and drive shaft, combined with the simple drive rod mechanism, removes redundant structural elements that contributed to complexity in conventional designs.
2Reliability
If traditional acetabular cup inserters are used, then the acetabular cup can be fixed and inserted, but the instrument is difficult to operate ergonomically
Solution Approach 1:
The handlebar is designed with an asymmetric configuration optimized for hand grip and rotational control. The extension portion features an asymmetric geometry that provides leverage for engaging and manipulating the acetabular cup, improving ergonomic handling while maintaining secure fixation capability.
Solution Approach 2:
The drive rod is designed to shift between forward and backward positions dynamically. In the forward position, it engages the acetabular cup for rotation and implantation. In the backward position, it disengages to allow easy release. This dynamic positioning mechanism simplifies operation while ensuring reliable fixation during the procedure.
3Reliability
If complex acetabular cup inserters are used, then implantation can be performed, but operational efficiency is reduced
Solution Approach 1:
The invention combines multiple functions into integrated components. The handlebar serves both as a grip for operator control and as a lever for actuating the drive mechanism. The extension portion simultaneously engages the acetabular cup and provides the mechanical advantage needed for secure fixation. This functional integration reduces the number of separate operations required, improving surgical efficiency while maintaining reliable implantation.
Data Source
AI summary
A surgical instrument for acetabular cup implantation includes an acetabular cup, a shell body and a drive shaft. The drive shaft includes a drive rod and a handle bar. The handle bar engages the pivot for angular displacement having forward position and backward position. In the forward position the drive rod rotates the acetabular cup forward, and in the backward position the drive rod shifts backward resulting in the acetabular cup engaged the extension portion. Accordingly, the operator rotates the handle bar to control the acetabular cup inserting into the position of acetabulum. The rotation of the handle bar results in the gripping or releasing of the acetabular cup or insert from the invention. Thus the invention provides a clear and ergonomic instrument for medical personnel concerning the operation of acetabular cup implantation.