Rotatable Drill Guide for Bone Fixation Alignment
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Solution Overview
Problem
Current bone fixation devices face challenges in accurately aligning guide wires within bone medullary cavities, leading to potential misalignment, lateral extension, further fractures, and inhibited insertion depth, due to the complexity of positioning these devices.
Innovation Solution
A multi-hole trocar with a drill guide and locking mechanism that allows for adjustable channel positioning and secure locking, enabling precise alignment and rotation of guide wires without constant distal pressure, allowing for accurate placement and adjustment without removing the device from the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a guide wire is inserted into a medullary cavity using conventional bone fixation devices, then the bone fixation device can be inserted to secure fragments or increase bone strength, but misalignment may occur leading to lateral extension, further fractures, or inhibited insertion depth
Solution Approach 1:
The drill guide is designed to be rotatable relative to the protection sleeve, providing dynamic adjustment capability. This allows the channels to be repositioned to different angular orientations while the device remains in place, enabling correction of alignment issues without device removal
2Measurement precision
If the drill guide is rotated to adjust channel positions for optimal alignment, then accurate guide wire insertion can be achieved, but the device complexity increases due to locking mechanisms and rotational adjustment features
Solution Approach 1:
The device separates the protection sleeve (which remains fixed on the bone) from the drill guide (which can be rotated and locked at different positions). This segmentation allows the drill guide to be independently adjusted without affecting the overall device stability or requiring complex integrated mechanisms
Solution Approach 2:
The drill guide incorporates a rotatable joint with a locking mechanism that allows dynamic repositioning. The channel can be rotated to different angular positions and then locked in place, providing adaptability without requiring complete device removal or replacement
3Measurement precision
If the aiming device is removed from the body to reposition the drill guide, then accurate alignment can be achieved, but the procedure time increases and the risk of contamination increases
Solution Approach 1:
The drill guide is designed with rotational capability that allows it to be repositioned while remaining attached to the protection sleeve and bone. This dynamic adjustment feature eliminates the need to remove the device for repositioning, reducing procedure time and contamination risk
Solution Approach 2:
The drill guide serves multiple functions: it provides multiple channel orientations through rotation, maintains stable attachment to the bone via the protection sleeve, and allows in-situ repositioning. This multi-functionality eliminates the need for device removal while achieving accurate alignment
Data Source
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AI summary
An aiming device for bone fixation includes (a) a handle extending from a first end to a second end along a longitudinal axis, (b) a guide arm connected to the second end of the handle and having an opening extending therethrough, the guide arm being connected to a protection sleeve; and (c) a drill guide configured and dimensioned for insertion through the opening of the guide arm. The drill guide has first and second guide channels extending therethrough to guide an insertion of a guide wire into a bone. The drill guide is movable between a first position wherein the drill guide is axially and rotationally movable relative to the guide arm to a second position wherein the drill guide is axially and rotationally locked relative to the guide arm.