Electrosurgical Smoke and Steam Detection for Energy Control

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Solution Overview

Problem

Existing surgical instruments lack the capability to effectively detect, analyze, and distinguish smoke and steam during energy-based tissue treatment, which can lead to inadequate control over the treatment process and potential collateral damage.

Innovation Solution

A surgical system with a sensor-equipped instrument that senses smoke properties, a controller to determine parameters based on these properties, and an energy output system to adjust energy application accordingly, utilizing optical, electrical, or chemical sensors to monitor and control energy delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If energy-based surgical instruments are used to treat tissue, then tissue treatment effectiveness is improved, but smoke and steam generation increases causing collateral damage

Engineering Contradiction:
Improvetissue treatment effectivenessVSAvoidsmoke and steam generation
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent implements a feedback mechanism where sensors detect smoke and steam properties (optical, electrical, or chemical characteristics) and provide real-time data to a controller. The controller adjusts energy delivery parameters based on this feedback to maintain effective tissue treatment while minimizing harmful smoke and steam generation. This closed-loop control system directly addresses the contradiction by using detection and control to balance treatment effectiveness against harmful byproduct generation.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system dynamically changes energy delivery parameters (such as power level, pulse duration, or frequency) based on detected smoke and steam characteristics. When sensors detect increased smoke or steam generation, the controller modifies energy parameters to reduce these harmful factors while maintaining adequate tissue treatment. This parameter adjustment strategy resolves the contradiction by adapting treatment conditions in real-time.

Inventive Principle:
Principle #35Parameter changes

2Manufacturing precision

If energy delivery is increased to improve treatment outcomes, then tissue treatment precision is improved, but smoke and steam generation increases

Engineering Contradiction:
Improvetissue treatment precisionVSAvoidsmoke and steam
Core Design Contradiction:
Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

The feedback mechanism continuously monitors smoke and steam generation and provides real-time information to the controller. When precision energy delivery begins to generate excessive smoke or steam, the system detects this through sensors and adjusts energy parameters accordingly. This allows the system to maintain high treatment precision while preventing harmful byproduct accumulation through dynamic parameter adjustment based on sensor feedback.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system applies energy in controlled amounts, using partial action rather than continuous maximum energy delivery. By delivering energy in regulated pulses or at optimized power levels, the system achieves adequate tissue treatment precision without generating excessive smoke and steam. This approach accepts slightly longer treatment time in exchange for reduced harmful byproduct generation.

Inventive Principle:
Principle #16Partial or excessive action

3Object-generated harmful factors

If smoke detection and control systems are added to surgical instruments, then collateral damage is reduced, but device complexity increases

Engineering Contradiction:
Improvecollateral damageVSAvoiddevice complexity
Core Design Contradiction:
Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The patent integrates sensors and a control system that provides automated feedback-based adjustment of energy delivery. The sensors detect smoke and steam properties, and the controller automatically modifies energy parameters to reduce collateral damage. This automated feedback system reduces the need for complex manual monitoring and intervention, managing device complexity through intelligent control algorithms.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The surgical instrument is designed with multi-functionality, combining tissue treatment capabilities with integrated smoke and steam detection and control functions. By making the instrument universal—capable of both treating tissue and monitoring/managing its own byproducts—the patent reduces the need for separate standalone devices, thereby managing overall system complexity while achieving reduced collateral damage.

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 precision of tissue treatment by allowing real-time adjustment of energy application based on smoke and steam detection, reducing collateral damage and ensuring effective treatment outcomes.

Implementation Method 1

The sensor includes at least one of: an optical sensor, an electrical sensor, a smell-based sensor, or a chemical sensor

Methodology Applied
Scientific EffectOptical sensing: Absorption (EM radiation)

Implementation Method 2

The sensor is configured to sense at least one property of smoke at the surgical site

Methodology Applied
Scientific EffectChemical sensing: Absorption (physical)

Implementation Method 3

Surgical instruments and methods for energy-based tissue treatment may utilize mechanical clamping action and application of energy, e.g., bipolar electrosurgical energy, to affect hemostasis by heating tissue

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 4

application of energy, e.g., bipolar electrosurgical energy, to affect hemostasis by heating tissue to treat, e.g., coagulate, cauterize, and/or seal, tissue

Methodology Applied
Scientific EffectElectrosurgical energy: Electrical Resistance

Implementation Method 5

The controller includes a storage device storing a machine learning algorithm configured to determine the at least one parameter based upon the at least one property

Methodology Applied
Scientific EffectMachine learning analysis:

Data Source

PatentUS12426941B2Surgical instruments and systems configured to detect, analyze, and/or distinguish smoke and steam during a surgical procedure
Publication Date: 2025.09.30 COVIDIEN LP
  • US12426941B2 patent drawing
  • US12426941B2 patent drawing
  • US12426941B2 patent drawing

AI summary

An electrosurgical system includes an end effector assembly and a sensor. The end effector assembly includes first and second jaw members each defining an electrically-conductive tissue-contacting surface. At least one of the first or second jaw members is movable relative to the other between a spaced-apart position and an approximated position for grasping tissue between the tissue-contacting surfaces thereof. The electrically-conductive tissue-contacting surfaces of the first and second jaw members are adapted to connect to a source of electrosurgical energy for conducting energy through tissue grasped therebetween to treat tissue. The sensor is configured to sense at least one property of smoke produced as a result of the conduction of energy through tissue grasped between the electrically-conductive tissue-contacting surfaces.