Flexible Electrosurgical Loop and Extraction Bag for Tissue Containment

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Solution Overview

Problem

Existing devices for receiving preparations in an extraction bag require direct contact with the body cavity to detach and collect tissue, risking the spread of carcinogenic tissue and exhaust gas during electrosurgical procedures.

Innovation Solution

A device with an elastically flexible electrosurgical cutting loop and extraction bag system, where the cutting loop is extended and arranged adjacent to the bag opening, allowing the loop to enclose the preparation directly into the bag, preventing tissue and gas spread, and featuring a second bag opening for camera or morcellator introduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the preparation is detached using an electrosurgical cutting loop in the body cavity and placed into the extraction bag using tongs, then the preparation can be removed from the body cavity, but the carcinogenic tissue and exhaust gas may spread unhindered in the body cavity

Engineering Contradiction:

Improvesafety of tissue removalVSAvoidspread of carcinogenic tissue and exhaust gas

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The electrosurgical cutting loop and extraction bag are merged into a single integrated device. The cutting loop is arranged adjacent to the first bag opening, allowing the loop to enclose the preparation directly into the bag during detachment, preventing spread of tissue and exhaust gas in the body cavity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The extraction bag with its first bag opening serves as an intermediary containment structure between the cutting loop and the body cavity. The elastically flexible first loop holds the bag opening open during the procedure, creating a controlled transition zone that captures tissue and exhaust gas immediately upon detachment

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If the cutting loop is positioned above the preparation and the preparation is detached by pulling closed the loop, then the preparation can be resected, but the preparation falls into the body cavity where it must be picked up with tongs

Engineering Contradiction:

Improveefficiency of tissue resectionVSAvoidcomplexity of tissue collection

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The cutting loop and extraction bag are combined in one device, eliminating the need for separate tongs to retrieve the preparation. The bag is positioned to receive the preparation directly at the moment of detachment

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The extraction bag is positioned and the first bag opening is held open by the elastically flexible first loop before the cutting loop detaches the preparation. This preliminary positioning ensures the preparation falls directly into the bag rather than into the body cavity

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If the extraction bag is extended out of the insertion tube with the first bag opening held open by the first loop, then the bag can receive the preparation, but the device structure becomes more complex

Engineering Contradiction:

Improvecapability to contain and remove preparationVSAvoidstructure of extraction bag system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The extraction bag is made of flexible material that can be collapsed for insertion and extended for use. The elastically flexible first loop provides automatic opening/closing action without requiring complex mechanical actuators, reducing overall device complexity while maintaining functionality

Inventive Principle:

Principle #30Flexible shells and thin films

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

Ensures safe and contained removal of resected tissue and exhaust gas within the extraction bag, minimizing the risk of carcinogenic tissue spread and allowing for efficient morcellation and visualization during procedures.

Implementation Method 1

The electrosurgical cutting loop is designed to be elastically flexible and can be extended out of the insertion tube together with the extraction bag via the actuator in an expanding manner. The cutting loop has an exposed non-insulated electrically conductive cutting region at the distal end of the loop

Methodology Applied

Scientific EffectElectrosurgical cutting: Joule Heating

Data Source

PatentUS10736650B2Device for receiving a preparation in an extraction bag

Publication Date: 2020.08.11 BOWA ELECTRONICS

AI summary

A device (1) has an extraction bag (5) to receive a preparation (29) that is detached using an electrosurgical cutting loop (6, 6′) in a body cavity (27). The extraction bag (5) can be extended out of a distal opening (10) of an insertion tube (3). The cutting loop (6, 6′) is flexible and can be extended out of the insertion tube (3) together with the extraction bag (5). The cutting loop (6, 6′) is adjacent a first bag opening (9) and adjacent a first loop (8′). The cutting loop (6, 6′) has an exposed non-insulated electrically conductive cutting region (14, 14′) at the distal end (13, 13′) of the loop, and an insulated region (15, 15′) outside of the cutting region (14, 14′). The extraction bag (5) has at least one second closable bag opening (17) at the end facing away from the first bag opening (9).