Tunable Mechanical Resonator for Precision Tissue Cutting
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Solution Overview
Problem
Existing vibrating blade microtomes lack the ability to precisely adjust vibration frequency and blade positioning, leading to imprecise cutting of biological tissues with varying hardness and fiber content, resulting in rough surfaces and inconsistent section thickness.
Innovation Solution
A mechanically adjustable resonator system with a tunable oscillator assembly, including a frame, excitation element, and blade, allowing for adjustable resonance frequency and blade positioning, utilizing a magnet and coil for oscillation and a clamp for frequency adjustment, along with a method to capture and align the oscillation pattern for high-precision cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed-frequency vibrating blade microtome is used, then the device structure is simple, but the cutting precision varies for tissues with different hardness and fiber content
Solution Approach 1:
The patent implements a tunable oscillation frequency system that allows the blade to be adjusted to different resonance frequencies based on tissue properties. The oscillator assembly includes adjustable parameters that enable dynamic adaptation of the vibration frequency, transforming a static fixed-frequency system into a dynamic可调 system that optimizes cutting precision for different tissue types without requiring complete redesign of the device structure
Solution Approach 2:
The patent changes the oscillation frequency parameter of the blade to match the resonance frequency of different tissue types. By adjusting the frequency parameter rather than changing the entire cutting system, the patent achieves adaptive precision cutting across varying tissue conditions while maintaining relative structural simplicity
2Manufacturing precision
If the blade oscillation is not confined to a single mechanical mode, then the device operation is simpler, but the cutting surface becomes rough and section thickness inconsistent
Solution Approach 1:
The patent utilizes mechanical vibration principles to confine the blade oscillation to a single fundamental mechanical mode. By designing the oscillator assembly to operate at its resonance frequency, the system naturally suppresses higher-order modes and ensures pure translational motion of the blade along the cutting edge, resulting in smooth cutting surfaces and consistent section thickness
Solution Approach 2:
The oscillator assembly is designed to perform multiple functions: it generates the vibrating motion, confines it to a single mechanical mode, and provides the necessary force for cutting. This multi-functionality reduces the need for additional separate components to control oscillation modes, maintaining relative operational simplicity while achieving precise cutting
3Adaptability or versatility
If the resonator frequency is fixed, then the device is easier to manufacture, but it cannot adapt to tissues with varying hardness and fiber content
Solution Approach 1:
The patent transforms the fixed-frequency resonator into a tunable system that can adapt its oscillation frequency to match different tissue properties. The oscillator assembly includes adjustable parameters that allow frequency tuning without requiring multiple fixed-frequency devices, achieving versatility while maintaining a single manufacturable design
Solution Approach 2:
The patent enables frequency parameter adjustment in the resonator system, allowing the same device to be manufactured once and then adapted to different tissue types through parameter changes rather than requiring multiple specialized devices. This approach balances manufacturing simplicity with operational adaptability
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
Enables precise cutting of biological tissues by confining the oscillating motion to a single mechanical mode, ensuring pure translation of the blade along the cutting edge, resulting in smooth surfaces and consistent section thickness across a wide range of tissue types.
Implementation Method 1
The excitation element can be selectively operable to provide an excitation signal to the oscillator assembly sufficient to cause the oscillator assembly to oscillate at the resonance frequency
Implementation Method 2
the excitation element can include a magnet that is selectively operable to provide the excitation signal to the oscillator assembly
Implementation Method 3
the oscillator assembly can be selectively operable to provide an excitation signal to the oscillator assembly sufficient to cause the oscillator assembly to oscillate at the resonance frequency
Data Source
AI summary
Apparatuses for cutting tissue include an oscillator assembly and a clamp. The oscillator assembly defines a resonance frequency and includes a frame, an excitation element, and a blade. The frame has an upper portion and a lower portion, and the lower portion is configured to oscillate relative to the upper portion. The excitation element is coupled with the lower portion of the frame, and the excitation element is selectively operable to provide an excitation signal to the oscillator assembly sufficient to cause the oscillator assembly to oscillate at the resonance frequency. The blade is coupled with the lower portion for sectioning tissue. The clamp is selectively moveable along the frame to alter the resonance frequency of the oscillator assembly.