Surgical Smoke Evacuation Sensing for Adaptive Suction Control

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Solution Overview

Problem

Existing surgical smoke evacuation systems are inadequate in effectively managing smoke, fluids, and particulates generated during surgical procedures, particularly due to inefficiencies in suction control and filtration, which can lead to health hazards and operational inefficiencies.

Innovation Solution

The implementation of a surgical evacuation system with advanced sensors and control mechanisms, including photoelectric and ionization sensors, to monitor and adjust suction pressure and airflow based on real-time conditions, combined with intelligent filtration systems to manage smoke, fluids, and particulates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional surgical smoke evacuation systems are used, then basic smoke removal is achieved, but health hazards and operational inefficiencies persist due to inadequate suction control and filtration

Engineering Contradiction:

Improvesmoke evacuation effectivenessVSAvoidhealth hazards from smoke exposure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system employs sensors (photoelectric and ionization) that continuously monitor smoke particle concentration and provide feedback to the control system. Based on this feedback, the system automatically adjusts suction pressure and airflow rates to maintain effective evacuation while minimizing health hazards from inadequate filtration or smoke recirculation.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system dynamically changes operational parameters including suction pressure, airflow rate, and fan speed based on real-time smoke generation conditions. The control system adjusts these parameters to optimize evacuation effectiveness while adapting to varying surgical conditions and smoke loads.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If suction pressure is increased to improve smoke evacuation, then smoke removal efficiency improves, but risk of tissue invagination and surgical site complications increases

Engineering Contradiction:

Improvesmoke evacuation efficiencyVSAvoidtissue invagination risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system transitions from static suction pressure to dynamic, real-time adjustment of suction pressure based on smoke particle detection. The control system continuously monitors smoke levels and adjusts suction pressure accordingly, applying higher pressure only when and where smoke generation is detected, thereby maintaining evacuation efficiency while minimizing tissue damage risk.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system applies suction pressure locally and selectively at the surgical site based on real-time smoke detection rather than applying uniform high pressure throughout. The adjustable suction pressure ensures adequate smoke removal from the surgical field while preventing excessive pressure that could cause tissue invagination.

Inventive Principle:

Principle #3Local quality

3Measurement precision

If multiple sensors and control mechanisms are added to improve evacuation precision, then suction control and filtration effectiveness improve, but device complexity increases

Engineering Contradiction:

Improvesmoke particle detection accuracyVSAvoidsensor and control system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The control system integrates multiple sensor types (photoelectric and ionization sensors) that serve complementary functions in detecting different particle sizes and smoke compositions. This multi-functional approach allows a single integrated system to handle various smoke generation scenarios and surgical conditions, improving measurement precision without proportionally increasing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 and safety of smoke evacuation by minimizing health risks and improving operational performance by adapting to varying surgical conditions, ensuring effective filtration and reduced exposure to harmful substances.

Implementation Method 1

photoelectric and ionization sensors, to monitor and adjust suction pressure and airflow

Methodology Applied

Scientific EffectPhotoelectric detection: Photoelectric Effect

Implementation Method 2

photoelectric and ionization sensors, to monitor and adjust suction pressure and airflow

Methodology Applied

Scientific EffectIonization: Ionisation

Implementation Method 3

a pump configured to generate a suction pressure differential within the flow path

Methodology Applied

Scientific EffectSuction: Suction

Data Source

PatentEP3505083B1Surgical evacuation sensor arrangements

Publication Date: 2025.10.01 ETHICON INC

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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.