Oscillating Rongeur Cutting Implement with Manual Power Modes
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Solution Overview
Problem
Existing powered rongeurs require continuous muscle power to operate, leading to fatigue and lack of control, especially when switching between manual and mechanized cutting modes, and struggle with precise force application due to gravitational forces affecting the cutting tube.
Innovation Solution
A powered rongeur with a motor-driven cutting unit and manually actuated linkage allows for both motor-assisted and manual cutting modes, with the cutting implement moving longitudinally and rotationally, enabling precise control and reduced muscle fatigue by only advancing the cutting implement and drive collar while keeping the motor static.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a powered rongeur with motor-driven cutting tube is used, then cutting efficiency is improved and muscle fatigue is reduced, but control precision and ability to switch between manual and powered modes deteriorate
Solution Approach 1:
The rongeur is divided into separate functional components: a motor assembly that provides powered oscillation and a manual actuation mechanism that allows the practitioner to independently control the cutting tube's longitudinal movement. This segmentation enables the practitioner to use powered oscillation for efficient cutting while maintaining manual control over the cutting depth and rhythm, thus resolving the contradiction between cutting efficiency and control precision.
2Ease of operation
If the cutting tube is manually reciprocated, then control precision is maintained, but muscle fatigue increases and cutting efficiency decreases
Solution Approach 1:
The motor assembly acts as an intermediary that converts electrical energy into oscillatory motion of the cutting tube. This intermediary mechanism provides the high-frequency oscillation needed for efficient cutting, while the practitioner's manual input only needs to provide longitudinal advancement, significantly reducing the muscle effort required compared to full manual reciprocation.
3Reliability
If gravitational forces act on the cutting tube, then force application becomes inconsistent, but adding counterbalancing mechanisms increases device complexity
Solution Approach 1:
The motor assembly and its mounting structure are designed to counterbalance the weight of the cutting tube and provide consistent oscillatory force. The motor's electromagnetic forces and the mechanical design of the oscillation mechanism compensate for gravitational effects, ensuring that the cutting tube receives consistent force application regardless of its orientation, thereby resolving the contradiction between force consistency and device complexity.
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
The solution provides efficient tissue cutting with reduced muscle fatigue and improved control by allowing seamless switching between cutting modes and precise force application, minimizing the impact of gravitational forces on cutting precision.
Implementation Method 1
a motor-driven cutting unit
Implementation Method 2
oscillating cutting implement
Data Source
AI summary
A rongeur cutting system and method of operating said system. The rongeur cutting system may comprise a cutting unit that includes an outer tube and a cutting implement capable of both oscillation and longitudinal movement within the outer tube. The rongeur cutting system may also comprise a handpiece including a power source and spindle for actuating the cutting implement. The method of operating the rongeur cutting system may comprise operating the rongeur cutting system in a manual mode and/or operating the rongeur cutting system in a power mode. The manual mode includes moving the cutting implement longitudinally within the outer tube to manually cut tissue without utilizing the power source, and the power mode includes actuating a motor to manipulate the cutting implement within the outer tube while moving the cutting implement longitudinally within the cutting tube.