Trial Neck Broach Kit for Hip Arthroplasty Inventory Reduction
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Solution Overview
Problem
Conventional hip arthroplasty methods require a large inventory of trial femoral neck components due to the need for different neck lengths and offsets for each stem size and offset variation, leading to inefficiencies in surgical procedures.
Innovation Solution
A kit that includes broaches of varying sizes with neck connection elements, such as projections, that allow the neck length to be varied, reducing the need for multiple trial femoral neck components by enabling the same trial component to be used with different broach sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional implant stem geometry with progressive neck length is used, then proper joint tension and leg length can be achieved, but a large inventory of trial femoral neck components is required
Solution Approach 1:
The trial femoral neck component is designed with a connection element that can interface with multiple broach sizes, allowing a single trial component to serve multiple functions across different stem sizes. The connection element includes a recess that can receive projections from broaches of varying dimensions, enabling one trial neck to accommodate progressive neck lengths for different implant configurations.
Solution Approach 2:
The system is divided into separate modular components: the trial femoral neck component with its connection element, and the broaches of varying sizes. This segmentation allows the trial neck to be combined with different broach sizes to create the desired neck length variations, eliminating the need for multiple dedicated trial necks for each broach size.
2Measurement precision
If different neck trials are provided for each stem size and offset variation, then precise neck length and offset selection is enabled, but device complexity and inventory requirements increase
Solution Approach 1:
The trial femoral neck component is designed with a connection element that can interface with multiple broach sizes, allowing a single trial component to serve multiple functions across different stem sizes. The connection element includes a recess that can receive projections from broaches of varying dimensions, enabling one trial neck to accommodate progressive neck lengths for different implant configurations.
Solution Approach 2:
The system allows dynamic adjustment of neck length by combining the trial femoral neck component with different broach sizes during the surgical procedure. The connection element enables flexible assembly where the neck length can be varied based on the specific surgical requirements, providing adaptability without requiring multiple static trial neck designs.
Data Source
AI summary
Kits and methods for use in intraoperative trialling of hip prostheses to determine an appropriate length for the femoral neck component of a prosthetic hip joint, are described. A kit for use in selecting a femoral neck component of an orthopaedic joint prosthesis kit comprises a first and a second broach. Each of the first and second broaches has a neck connection element comprising a projection extending from a proximal surface of the broach, each projection having a length. The projection on the first broach has a different length than the projection on the second broach. The kit also includes a trial femoral neck component having a neck connection element in the form of a recess in a distal surface. The recess is configured to mate with the projection on each of the first or second broaches such that mating of the trial femoral neck component with the first broach provides an assembly with a first neck length, and the mating of the trial femoral neck component with the second broach provides an assembly with a second neck length.