Cannulated Collinear Reduction Clamp for Fracture Screw Fixation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional collinear reduction clamps lack mechanisms for inserting a bone screw and washer through the device to secure a fracture, and they do not facilitate the use of cannulated bone screws.
Innovation Solution
A collinear reduction clamp with a compression rod featuring a cannulated bore and a cap with a bone screw washer, allowing a bone screw and washer to be inserted directly into the fracture site, and a ratcheting mechanism for enhanced compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional collinear reduction clamp is used, then the fracture can be compressed, but there is no mechanism for inserting a bone screw and washer through the device to secure the fracture
Solution Approach 1:
The patent combines the compression rod with a cannulated bore and a cap that receives a bone screw washer, merging the compression function with the fixation function into a single integrated device. This allows the bone screw and washer to be inserted through the same rod used for compression, eliminating the need for separate fixation steps and reducing overall device complexity.
Solution Approach 2:
The compression rod is designed with multi-functionality: it serves both as a compression element to reduce the fracture and as a guide for inserting the bone screw and washer. The cannulated bore in the rod and the cap structure enable the same component to perform multiple functions, improving ease of operation without adding separate dedicated components.
2Adaptability or versatility
If a conventional collinear reduction clamp is used, then compression can be applied, but cannulated bone screws cannot be utilized
Solution Approach 1:
The compression rod is merged with a cannulated bore structure and a cap that can receive a bone screw washer. This integration allows cannulated bone screws to be passed through the rod during insertion, enabling the use of cannulated screw technology without requiring a completely separate fixation device.
Solution Approach 2:
The cannulated bore in the compression rod acts as an intermediary structure that facilitates the passage of cannulated bone screws. The bore serves as a guide and protective channel during screw insertion, enabling compatibility with cannulated screw technology while maintaining the compression function.
3Reliability
If a bone screw and washer are inserted through the compression rod, then fixation is improved, but the rod structure becomes more complex
Solution Approach 1:
The bone screw washer is integrated with the compression rod through a cap structure that receives the washer. This merging of the fixation mechanism with the compression rod creates a unified structure where the rod, cap, and washer work together as a single system, improving fixation reliability without requiring entirely separate components.
Solution Approach 2:
The bone screw washer is nested within the cap structure that is attached to the compression rod. This nesting arrangement allows the washer to be positioned and secured within the rod assembly, providing reliable fixation while maintaining a compact integrated structure rather than requiring separate loose components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables secure fixation of bone fractures with increased compressive force and allows for the use of cannulated bone screws, reducing the number of steps and complexity in the fixation process.
Implementation Method 1
The compression rod includes a plurality of ratchets formed thereon. The advancing mechanism includes a ratchet plate. Activation of the advancing mechanism causes the ratchet plate to interact with the plurality of ratchets formed on the compression rod to advance the compression rod
Implementation Method 2
The compression rod includes a cannulated bore extending between the first end and the second end. In use, the cannulated bore enables a bone screw to pass therethrough so that a bone screw can be inserted into the patient's bone
Implementation Method 3
The first end of the compression rod includes a cap that receives a bone screw washer. In use, when used in combination with the cannulated bore, a bone screw can be inserted through the cannulated bore of the compression rod, the bone screw passing through the bone screw washer positioned within the cap
Data Source
AI summary
A collinear reduction clamp including a compression rod, an arm, and an advancing mechanism for moving the compression rod relative to the arm. In some examples, the rod may include a cannulated bore to enable a bone screw to be inserted therein. The rod may also include a cap. The cap including a bone screw washer. In use, a bone screw can be inserted through the cannulated bore of the rod, the bone screw passing through the washer thereby coupling the washer to the bone screw thereby enabling both the bone screw and the washer to be inserted into the patient's bone directly at the compression site. In some examples, the cannulated bore may be used in combination with first and second tubes and a guidewire to enable a cannulated bone screw to be inserted therein. In some examples, the arm may be configured as a length adjusting arm.