Oscillating Bone Removal Tool With Adjustable Cutting Angle
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Solution Overview
Problem
Existing surgical bone cutting tools with rotating drill tips risk catching and wrapping adjacent tissue, particularly when handling delicate structures like nerves and ligaments, due to improper handling.
Innovation Solution
A surgical device with an oscillating surgical tool driven by a motor, featuring a gear assembly and angular displacement mechanism that adjusts the oscillation angle and exposure length of the tool, allowing for controlled cutting and shaving of bone or hard tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating drill tip is used for bone cutting, then cutting efficiency is improved, but tissue entanglement and wrapping around the drill tip increases
Solution Approach 1:
The patent applies periodic oscillating motion instead of continuous rotation. The drill bit oscillates back and forth through a controlled angle range, creating periodic cutting action that prevents tissue from wrapping around the tool while maintaining effective bone removal capability
Solution Approach 2:
The patent transitions from static rotation to dynamic oscillating motion. The oscillation mechanism allows the drill bit to dynamically adjust its position between forward and backward movements, preventing tissue entanglement while maintaining cutting effectiveness through controlled motion variation
2Reliability
If oscillating motion is used to reduce tissue wrapping, then tissue safety is improved, but cutting aggressiveness and efficiency may be reduced
Solution Approach 1:
The patent changes the motion parameters by introducing oscillation angle as a controllable variable. By adjusting the oscillation angle and frequency, the system optimizes the balance between tissue safety and cutting aggressiveness, allowing effective bone removal while preventing tissue wrapping
Solution Approach 2:
The periodic oscillating action provides controlled cutting intervals that maintain tissue safety while achieving sufficient cutting aggressiveness through repeated forward cutting strokes, effectively removing bone without allowing tissue to wrap around the tool
3Device complexity
If fixed oscillation angle is used for simplicity, then device complexity is reduced, but adaptability to different surgical needs is limited
Solution Approach 1:
The patent implements a dynamic adjustment mechanism that allows the oscillation angle to be changed during or between procedures. This enables the same device to adapt to different surgical requirements while maintaining a relatively simple overall structure through modular design
4Device complexity
If tool exposure length is fixed, then device complexity is reduced, but precision and control during surgery are limited
Solution Approach 1:
The patent implements a dynamic adjustment mechanism for tool exposure length that allows the surgeon to control how much of the drill bit is exposed during surgery. This provides precise control over cutting depth and location while maintaining relatively simple device architecture through straightforward mechanical adjustment components
Data Source
AI summary
A surgical device for cutting or shaving bone or tissue includes a housing having an elongated tube extending therefrom, the elongated tube configured to support a surgical tool at a distal end thereof. A gear assembly is disposed within the housing and is configured to control oscillation of the surgical tool. A motor is operably coupled to the housing and is configured to drive the gear assembly upon activation thereof. The motor is moveable relative to the housing to adjust one or more gears of the gear assembly which, in turn, adjusts an oscillation angle of the surgical tool to control the aggressiveness of the surgical tool when cutting tissue or bone.