Osteotomy Guide Position Confirmation Without Bone Rod Insertion
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Solution Overview
Problem
Existing bone treatment assistance devices require inserting a rod into a feature point to confirm attachment accuracy, which burdens the bone and is a cumbersome operation, making it difficult for surgeons to objectively assess the device's position and deviation.
Innovation Solution
An attaching position confirmation device with a feature point indication rod, a rod support unit, and an elongate member with scales, which supports the rod support unit on the bone treatment assistance device to indicate the feature point and provide positional feedback, along with a position detection program to generate three-dimensional bone models and calculate optimal attachment positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rod is inserted through a guide hole and thrust into a feature point to confirm attachment position, then the attachment accuracy can be checked, but the bone is subjected to additional burden and the operation becomes troublesome
Solution Approach 1:
The patent extracts the confirmation function from the bone itself by using a separate indicator rod and scale system. The indicator rod with scales provides attachment position information without requiring insertion into the bone, thereby separating the measurement function from the bone structure and eliminating the burden of repeated rod insertion.
Solution Approach 2:
The patent introduces an intermediary indicator rod that carries scale markings to transfer attachment position information from the assistance device to a visible reference point. This intermediary element allows the surgeon to read the attachment position without directly inserting measurement tools into the bone, simplifying the operation while maintaining measurement precision.
2Measurement precision
If a rod is thrust into a feature point to check attachment position, then position confirmation is possible, but it is difficult to objectively recognize the accuracy and deviation
Solution Approach 1:
The patent implements a feedback mechanism where the indicator rod displays scale markings that provide real-time visual information about the attachment position. The scales on the indicator rod give objective numerical feedback about the distance from the target position, allowing the surgeon to quantitatively assess attachment accuracy and deviation without subjective judgment.
Solution Approach 2:
While the patent primarily uses scale markings, the principle of visual indication is applied through the clear display of numerical scales and reference marks on the indicator rod. This visual feedback system transforms abstract position information into easily interpretable visual cues that provide objective recognition of attachment accuracy.
3Reliability
If the rod insertion method is used to confirm attachment position, then position verification is achieved, but the workload and impact on the bone increase
Solution Approach 1:
The patent segments the position verification function into a separate indicator system that operates independently from the bone structure. The indicator rod with its scale markings provides reliable position verification through external measurement rather than internal bone penetration, reducing the harmful impact on the bone while maintaining verification reliability.
Data Source
AI summary
An osteotomy assistance kit includes a bone treatment assistance device and an attaching position confirmation device. The attaching position confirmation device includes a feature point indication rod to be applied via a tip portion to a feature point of the bone, a rod support unit that removably supports the feature point indication rod such that the tip portion is indicating the feature point of the bone, and a second support member that movably supports the rod support unit and indicates one of scales on the rod support unit. The bone treatment assistance device includes cutting slits, and first guide holes that guides first rods set to a predetermined positional relation. The second support member of the attaching position confirmation device is attached to the protrusion of the bone treatment assistance device.