Surgical Smoke Evacuation Feedback Control for Dynamic Suction
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Solution Overview
Problem
Current surgical smoke evacuation systems are inadequate in efficiently managing smoke and particulates generated during electrosurgical procedures, leading to health risks for medical professionals and patients due to incomplete removal and potential toxicity.
Innovation Solution
A surgical system comprising a pump, motor, flow path, and sensor that monitors fluid parameters, with a generator and control circuit to adjust energy waveforms based on sensor data, optimizing smoke evacuation by dynamically adjusting suction and filtration in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed-rate suction system is used, then the device complexity is reduced, but the smoke evacuation efficiency deteriorates due to inability to adapt to varying smoke generation rates
Solution Approach 1:
The suction rate is made dynamic rather than fixed. The motor speed is continuously adjusted based on real-time smoke detection feedback, allowing the system to adapt to varying smoke generation rates during different surgical procedures. This resolves the contradiction by enabling high evacuation efficiency when needed while maintaining manageable complexity through automated control.
Solution Approach 2:
A feedback control loop is implemented where smoke sensors continuously monitor smoke levels and send signals to the control circuit, which then adjusts the motor speed accordingly. This closed-loop feedback system automatically optimizes evacuation efficiency without requiring complex manual intervention, resolving the contradiction between efficiency and complexity.
2Power
If high power energy waveform is continuously supplied, then the electrosurgical cutting effectiveness is improved, but the smoke generation increases requiring more intensive evacuation
Solution Approach 1:
The energy delivery is converted from continuous to periodic/pulsed operation. The control circuit delivers electrosurgical energy in controlled pulses rather than continuous high power, which maintains cutting effectiveness while significantly reducing smoke generation. This resolves the contradiction by achieving adequate surgical performance with lower harmful emissions.
Solution Approach 2:
The energy waveform parameters (power level, pulse duration, frequency) are dynamically adjusted based on real-time smoke detection. When smoke levels rise, the system automatically modifies energy delivery parameters to reduce smoke generation while maintaining surgical effectiveness, resolving the contradiction between power and smoke generation.
3Loss of time
If manual smoke evacuation control is used, then the ease of operation is maintained, but the response time to smoke generation deteriorates
Solution Approach 1:
The system performs self-adjustment of suction rate based on automatic smoke detection without requiring manual intervention. The smoke sensors and control circuit work autonomously to optimize evacuation, dramatically reducing response time while actually simplifying operation since the system adjusts itself without user input. This resolves the contradiction by making the system both faster and easier to operate.
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
Enhances the efficiency of smoke evacuation, reduces health risks by ensuring complete removal of toxic particles and gases, and minimizes post-operative complications by optimizing the surgical process.
Implementation Method 1
a sensor positioned along the flow path. The sensor is configured to monitor a parameter of a fluid flowing along the flow path
Implementation Method 2
a pump, a motor operably coupled to the pump, a flow path fluidically coupled to the pump
Data Source
Figure 1
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Figure 4
AI summary
Surgical systems can include evacuation systems for evacuating smoke, fluid, and/or particulates from a surgical site. A surgical evacuation system can be intelligent and may include one or more sensors for detecting one or more properties of the surgical system, evacuation system, surgical procedure, surgical site, and/or patient tissue, for example.