Fluid Injection Device With Multi-Parameter Waveform Control
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Solution Overview
Problem
Existing fluid injection devices for surgical applications face challenges in adjusting multiple correlated control parameters, leading to unstable operation and insufficient incision performance, especially when the supplied fluid amount is limited.
Innovation Solution
A fluid injection device with a driving waveform generating device that includes an adjusting device and a one-input multiple-control parameter changing unit, allowing simultaneous adjustment of control parameters to optimize fluid injection conditions based on tissue hardness, using a pulsating and resting waveform with adjustable amplitude, frequency, and resting time, and incorporating an optimum control parameter setting table for various surgical sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple control parameters are adjusted simultaneously to optimize fluid injection conditions, then incision performance and operational stability are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple control parameters (amplitude, frequency, resting time) into a single integrated control system. The one-input multiple-control parameter changing unit receives a single input signal and simultaneously adjusts all necessary parameters, merging what would otherwise be separate control mechanisms into one unified device that simplifies operation while maintaining comprehensive control.
Solution Approach 2:
The driving waveform generating device serves multiple functions simultaneously: it generates pulsating waveforms, adjusts amplitude and frequency, controls resting time, and adapts to different tissue types. This multi-functional integration allows a single device to handle various surgical conditions without requiring multiple separate control systems.
2Productivity
If fluid injection amount is increased to improve incision performance, then cutting effectiveness increases, but fluid loss and potential infection risk increase
Solution Approach 1:
The patent employs periodic pulsating fluid injection rather than continuous flow. The driving waveform includes alternating pulsating portions (for incision) and resting portions (for fluid conservation). This periodic action allows the system to achieve effective tissue cutting through repeated high-pressure pulses while reducing overall fluid consumption compared to continuous injection.
Solution Approach 2:
The system dynamically changes fluid injection parameters (pressure, flow rate, pulse duration) based on the detected tissue hardness and required incision depth. By adjusting these parameters rather than maintaining constant high-flow injection, the system achieves effective cutting with minimized fluid loss.
3Strength
If pulsation amplitude is increased to enhance incision of harder tissues, then cutting performance improves, but fluid amount required increases
Solution Approach 1:
The patent applies high-amplitude pulsation only during the pulsating portions when incision is needed, rather than maintaining high amplitude continuously. The resting portions allow fluid to be conserved while the system prepares for the next incision pulse. This partial application of high energy only when necessary achieves effective hard tissue cutting without requiring excessive fluid amounts.
Data Source
AI summary
A fluid injection device includes a fluid supply unit that accommodates and supplies fluid, a fluid injection unit that injects fluid supplied from the fluid supply unit, and a driving waveform generating device which is equipped with at least one adjusting device, a one-input multiple-control parameter changing unit that simultaneously changes plural control parameters for determining a fluid injection condition of the fluid injection unit on the basis of a signal from the at least one adjusting device, and a driving waveform generator that generates and outputs a driving waveform of the fluid injection unit on the basis of the control parameters set by the one-input multiple-control parameter changing unit.