Radially Deployable Surgical Snare for Unobstructed Cauterization
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Solution Overview
Problem
Conventional retrieval devices for surgical procedures, such as polyp removal, suffer from impaired visibility due to mesh or wire-formed capture components that obstruct the camera view and are difficult to position and rotate within small body cavities, hindering the effective removal and retrieval of small tissue samples.
Innovation Solution
A radially deployable capture component with infinitely variable geometric shape and deployment, initially restrained to minimize visual obstruction during cauterization, which deploys around a central axis to form a planar snare or capture basket, allowing for enhanced visibility and easy manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mesh or wire-formed capture components are used for tissue retrieval, then the device can effectively capture and hold tissue samples, but the camera view is impaired and the device is difficult to position and rotate within small body cavities
Solution Approach 1:
The capture component is divided into multiple radially deployable members (three or more) that can be independently positioned and rotated around a central axis. Each member can be selectively deployed or retracted, allowing the surgeon to adjust the configuration for optimal positioning and rotation within the body cavity while maintaining effective tissue capture when deployed.
Solution Approach 2:
The capture component transitions from a static mesh or wire structure to a dynamic radially deployable structure. The members can be radially deployed outward to form a capture basket for holding tissue, or radially retracted to minimize obstruction of the camera view and facilitate positioning and rotation during the procedure.
2Reliability
If the capture component is deployed to effectively capture tissue, then tissue retrieval is improved, but the camera view is obstructed
Solution Approach 1:
The capture component dynamically changes its radial configuration based on procedural needs. During cauterization and when camera viewing is required, the members are radially retracted to minimize visual obstruction. When tissue capture is needed, the members are radially deployed to form an effective capture basket, thus dynamically balancing visibility and capture effectiveness.
Solution Approach 2:
The radially deployable members are preliminarily positioned in a retracted state during the cauterization phase to maintain clear camera views. Only after the cauterization is complete and tissue capture is required do the members deploy radially, ensuring that the camera view remains unobstructed during the critical cutting and cauterization steps.
3Reliability
If the capture component is made of mesh or wire material, then tissue capture is effective, but the device cannot function as both snare and catch basket in combination
Solution Approach 1:
The radially deployable members serve multiple functions: when radially deployed, they form a capture basket for holding tissue; when radially retracted, they minimize obstruction and facilitate positioning. The same structural members that provide mechanical strength for tissue capture also enable the dual functionality of serving as both snare and catch basket components, eliminating the need for separate mesh or wire structures.
Data Source
AI summary
A surgical instrument featuring a combination cauterizing and surgical capture component. The instrument is deployable from a distal end of a lumen to a first position partially exposing a cauterizing loop and restrained radially deployable members wherein a plurality of cauterizations may be performed. The instrument is deployable to a second position fully translated from the lumen wherein the plurality of radially positionable members may be released by activation of a release member to allow the biased members to deploy radially around an axis running through the loop.