Chevron Osteotomy Targeting Guide and Displacement Elevator
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Solution Overview
Problem
Current procedures for chevron osteotomy are inadequate due to the misuse of osteotome/periosteal elevators, which can cause damage to soft tissue and bone, and lack ideal fixation of permanent fixation members.
Innovation Solution
The development of a targeting guide, displacement elevator, and surgical screw guide specifically designed for chevron osteotomy, featuring ergonomic designs and precise instrumentation to minimize tissue damage and ensure accurate fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an osteotome elevator is used for chevron osteotomy, then the procedure can be performed, but soft tissue and bone damage occurs due to improper design
Solution Approach 1:
The surgical system is divided into specialized components: a targeting guide for precise positioning, a displacement elevator with specific geometry for bone separation, and a surgical screw guide for fixation. Each component is optimized for its specific function rather than using a generic osteotome elevator for all tasks.
Solution Approach 2:
The targeting guide acts as an intermediary device that facilitates precise placement of the displacement elevator and subsequent fixation members. It mediates between the surgeon's intent and the actual surgical action, ensuring accurate positioning and minimizing tissue damage.
2Ease of manufacture
If an osteotome elevator is used for chevron osteotomy, then the procedure can be performed, but operation difficulty increases due to rotation and ergonomics issues
Solution Approach 1:
The displacement elevator features an asymmetric design with a rounded distal tip and predetermined curve that provides stable engagement with bone tissue without rotating during use. The asymmetric geometry ensures consistent orientation and control during single-hand operation.
Solution Approach 2:
The displacement elevator incorporates a rounded distal tip with predetermined curvature that matches the anatomical geometry of the surgical site. This curved design provides ergonomic handling and prevents rotation during insertion and displacement operations.
3Ease of operation
If displacement is performed during osteotomy, then bone portions can be repositioned, but fastener placement becomes difficult
Solution Approach 1:
The targeting guide is positioned and secured to the bone before displacement is performed. This preliminary positioning establishes reference points and guidance pathways that remain valid throughout the displacement process, enabling accurate fastener placement even after bone repositioning.
Solution Approach 2:
The surgical screw guide acts as an intermediary that maintains the relationship between the displaced bone portions and the fixation members. It translates the displaced bone position into accurate fastener placement, ensuring precise fixation despite the bone repositioning.
4Reliability
If a targeting guide and specialized tools are used, then surgical precision and safety improve, but device complexity increases
Solution Approach 1:
The targeting guide serves multiple functions: it positions the displacement elevator, guides k-wire insertion, and facilitates surgical screw placement. By consolidating these functions into a single device, the overall system complexity is reduced despite the specialized nature of each function.
Data Source
AI summary
A targeting guide is disclosed includes a handle extending substantially along a longitudinal axis. The longitudinal handle defines one or more burr holes extending from a first side of the handle to a second side of the handle. A head is coupled to a distal end of the longitudinal handle. The head defines a plurality of guide holes sized and configured to receive a k-wire therethrough.