Electrosurgical Lightbox Optical Sensing for Tissue Detection

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Solution Overview

Problem

Current electrosurgical instruments lack effective optical sensing mechanisms for accurately detecting tissue position and status during grasping, cutting, and sealing, which can lead to incomplete capture and inefficient sealing processes.

Innovation Solution

The integration of optical sensing lightboxes with multiple sensing locations and modes (transmission and reflectance sensing) within the electrosurgical instrument's jaws, utilizing optical fiber bundles and angled surfaces to detect tissue presence and position, and a processor for real-time feedback to the operator.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If optical sensing lightboxes with multiple sensing locations are integrated into the electrosurgical instrument, then tissue detection accuracy is improved, but device complexity increases

Engineering Contradiction:
Improvetissue detection accuracyVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The optical sensing system is divided into multiple separate lightboxes, each containing optical fiber bundles positioned at different locations within the jaws. Each lightbox operates independently with its own optical fibers arranged in specific patterns, allowing the system to detect tissue presence and status at multiple discrete points simultaneously. This segmentation enables high measurement precision across different tissue regions while keeping each individual lightbox module relatively simple in structure.

Inventive Principle:
Principle #1Segmentation

2Adaptability or versatility

If multiple optical fiber bundles with different arrangements are used for transmission and reflectance sensing, then tissue status detection capability is improved, but device complexity increases

Engineering Contradiction:
Improvetissue status detection capabilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Multiple optical fiber bundles are integrated into the lightboxes such that each bundle can perform multiple functions: some fibers are arranged for transmission sensing mode while others are arranged for reflectance sensing mode. The same physical infrastructure of optical fiber bundles serves both sensing modalities, allowing the system to adapt to different tissue types and surgical conditions without requiring separate dedicated systems for each sensing type, thereby achieving versatility while managing complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Reliability

If real-time optical feedback is provided to the operator, then sealing completeness is improved, but device complexity increases

Engineering Contradiction:
Improvesealing completenessVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The optical sensing system continuously monitors tissue presence, position, and status during the sealing process and provides real-time feedback to the operator through visual indicators. The feedback mechanism compares the optical signals received from the tissue against predetermined thresholds to determine whether sealing conditions are met. This feedback loop ensures complete sealing by alerting the operator if tissue is not properly captured or if sealing parameters are not achieved, thereby improving reliability while the feedback mechanism itself remains integrated within the existing optical fiber infrastructure.

Inventive Principle:
Principle #23Feedback

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 accuracy of tissue detection and capture, preventing partial cutting and ensuring complete sealing by providing visual and audible indications based on tissue capture conditions, thereby improving the safety and efficacy of the surgical process.

Implementation Method 1

utilizing optical fiber bundles and angled surfaces to detect tissue presence and position

Methodology Applied
Scientific EffectOptical fiber: Optical Fibre

Implementation Method 2

transmission and reflectance sensing

Methodology Applied
Scientific EffectLight transmission: Light

Implementation Method 3

transmission and reflectance sensing

Methodology Applied
Scientific EffectLight reflection: Reflection

Data Source

PatentUS20230096074A1Electrosurgical instrument with light accumulator end effector and fiber optics
Publication Date: 2023.03.30 CILAG GMBH INTERNATIONAL
  • US20230096074A1 patent drawing
  • US20230096074A1 patent drawing
  • US20230096074A1 patent drawing

AI summary

A surgical instrument includes a shaft assembly having a distal end and an end effector at the distal end of the shaft assembly. The end effector includes a first jaw and a second jaw movably coupled relative to the first jaw for clamping tissue therebetween. The end effector also includes at least one lightbox for detecting the tissue. The at least one lightbox includes a housing having at least one optically transmissive surface configured to face the tissue. The at least one lightbox also includes at least one of an illuminating element or a light receiving element. The at least one of an illuminating element or a light receiving element is secured to the housing.