Single-Hand Osteotomy Instrument with Lateral Displacement Dial
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Solution Overview
Problem
Current osteotomy instruments require both hands to position and stabilize vertebrae, limiting efficiency and even force distribution during surgical procedures.
Innovation Solution
An osteotomy instrument designed for single-handed operation, featuring a handle with pivotable arm assemblies and a displacing mechanism that allows lateral displacement of pedicle screws, and a tuning mechanism for angular adjustment, enabling precise positioning and stabilization of vertebrae with reduced procedure time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If current osteotomy instruments are used with two hands to position arms, then positioning accuracy is achieved, but operation efficiency is reduced and procedure time increases
Solution Approach 1:
The patent combines multiple adjustment functions (lateral displacement and angular positioning) into a single integrated instrument that can be operated with one hand. The first and second arm assemblies are merged into one unified structure with coordinated adjustment mechanisms, allowing the operator to control both arms simultaneously using only one hand, thereby improving operation efficiency without sacrificing positioning accuracy
Solution Approach 2:
The instrument incorporates dynamic adjustment mechanisms including a displacing mechanism with a dial for lateral displacement and a tuning mechanism for angular positioning. These mechanisms allow real-time, continuous adjustment of the arm assemblies during the surgical procedure, enabling the operator to quickly adapt to different positioning requirements without removing or reconfiguring the instrument, thus reducing procedure time
2Adaptability or versatility
If current osteotomy instruments use two mechanisms for positioning outer pedicle screw, then positioning flexibility is achieved, but device complexity increases
Solution Approach 1:
The patent implements a universal adjustment system where the displacing mechanism and tuning mechanism serve multiple functions. The displacing mechanism adjusts the lateral position of both first and second arm assemblies simultaneously, while the tuning mechanism adjusts the angular position of both arm assemblies. This multi-functional approach provides comprehensive positioning flexibility without requiring separate mechanisms for each adjustment, thereby reducing overall device complexity
Solution Approach 2:
The positioning system is segmented into two independent but coordinated mechanisms: the displacing mechanism for lateral displacement and the tuning mechanism for angular adjustment. Each mechanism handles a specific degree of freedom, allowing for simplified individual mechanism design while achieving comprehensive positioning capability when both mechanisms work together. This segmentation reduces the complexity of each individual mechanism compared to having a single complex mechanism handling all adjustments
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
Facilitates efficient and precise stabilization of vertebrae during surgical procedures by allowing single-handed operation, reducing procedure time and ensuring even force distribution with the ability to pivot and laterally displace pedicle screws.
Implementation Method 1
The displacing mechanism includes a dial having a threaded shaft. The dial may be disposed at a free end of the handle and the threaded shaft is disposed within the handle.
Implementation Method 2
The first arm assembly is pivotably mounted to the handle. The second arm assembly is pivotably mounted to the handle.
Implementation Method 3
The fastener housing includes an eject mechanism configured to release the fastener from the fastener housing. The eject mechanism may be actuated by a simple push, thus allowing the operator to disengage the instrument from the organic subject matter after the fasteners have been inserted.
Data Source
AI summary
An osteotomy instrument includes a handle, a first arm assembly, a second arm assembly, a displacement mechanism, and a tuning mechanism. The first arm assembly is pivotably mounted to the handle. The first arm assembly includes a first fastener support configured to hold a fastener. The second arm assembly is pivotably mounted to the handle. The second arm assembly includes a second fastener support configured to hold a fastener. The displacing mechanism includes a dial disposed on the handle. The displacing mechanism is configured to laterally displace a distal end of the first arm assembly and second arm assembly away and towards each other. The dial actuates the displacing mechanism. The tuning mechanism is configured to change an angular position of the first fastener support with respect to the second fastener support.