Articulated Guide Wire Targeting System for Orthopedic Insertion
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Solution Overview
Problem
Current guide wire insertion procedures face challenges such as radiation exposure for surgeons, drill instability, and potential guide wire bending, leading to inaccurate positioning and increased operation time, especially in anatomical sites like the foot.
Innovation Solution
A targeting system with a stabilization body and articulated connection means, including a telescopic structure and ball joints, allows for precise manual adjustment and stabilization of a guide cannula to ensure accurate guide wire insertion, reducing the risk of bending and improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the surgeon holds the drill firmly in hand to ensure correct positioning of the guide wire, then the guide wire positioning accuracy is improved, but the surgeon's hands are constantly exposed to radiation and the drill becomes unstable due to its weight causing oscillations
Solution Approach 1:
The patent introduces a stabilization body as an intermediary device that is fixed to the bone and provides a stable support structure for the guide wire insertion. This mediator transfers the positioning function from the surgeon's hands to a stable external structure, eliminating hand oscillations and radiation exposure while maintaining positioning accuracy through the stabilization body's fixed reference frame
Solution Approach 2:
The patent replaces the manual mechanical control system (surgeon's hands holding the drill) with a stabilized mechanical system (drill guide fixed to the stabilization body). This substitution eliminates the instability caused by human hand movements and constant radiation exposure, providing a more reliable and accurate guide wire insertion mechanism
2Length of moving object
If a guide wire with very high length relative to its cross section is used, then the guide wire can reach the insertion point, but the guide wire is susceptible to bending due to peak load applied with the drill
Solution Approach 1:
The patent applies preliminary action by pre-positioning the drill guide on the stabilization body before drill insertion. This establishes a stable reference frame and proper alignment in advance, allowing the guide wire to be inserted along a pre-determined accurate path without experiencing bending loads, thus maintaining both the required length and structural stability
3Measurement precision
If the drill is used for guide wire insertion, then the guide wire can be positioned, but the operation time increases and accuracy is compromised due to drill oscillations
Solution Approach 1:
The patent replaces the oscillating manual drill system with a stabilized drill guide system fixed to the stabilization body. This mechanical substitution eliminates drill oscillations, improving positioning accuracy while reducing operation time by providing a stable, pre-positioned guide for faster and more accurate guide wire insertion
Data Source
AI summary
A targeting system (1) for the guided insertion of a guide wire (50) or a bone screw comprising: a stabilization body (2) fixed to the bone by means of stabilization screws (3); a guide sleeve (4) adapted to receive a guide cannula (5) for the insertion of the guide wire (50) or bone screw; articulated connection means (6) adapted to connect the stabilization body (2) to the guide sleeve (4) and allow the relative spatial position of the guide sleeve (4) to be varied with respect to the stabilization body (2).