Dual-bending sphinctertome multidirectional tissue cutting
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Solution Overview
Problem
Current surgical cutting devices used in minimally invasive procedures, such as laparoscopic surgery, are time-consuming and can cause unnecessary tissue distress when forming multidirectional incisions, particularly in delicate tissues like the stomach wall.
Innovation Solution
A flexible elongate member with constrained and anchored tissue cutting wires that can be selectively tensioned to change configuration from a delivery state to a cutting state, allowing for multidirectional cutting by bending and exposing wire segments to form cuts in different directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional sphinctertome is used to form multidirectional incisions, then the procedure can be completed, but the process is time consuming and causes unnecessary tissue distress
Solution Approach 1:
The device divides the cutting function into multiple independent wires (first wire, second wire, etc.) that can be selectively deployed. Each wire can be independently advanced and positioned to create incisions in different directions simultaneously or sequentially, eliminating the need for repeated device repositioning and reducing tissue trauma from multiple insertions
Solution Approach 2:
The device enables multidirectional cutting by deploying wires in different spatial orientations (different directions along the gastrointestinal tract wall) rather than requiring sequential unidirectional cuts. This dimensional approach allows simultaneous or coordinated incisions in multiple directions, significantly improving efficiency and reducing tissue distress
2Adaptability or versatility
If repeated device repositioning is performed to form multidirectional cuts, then cutting in different directions is achieved, but tissue distress increases and procedure time increases
Solution Approach 1:
The device integrates multiple cutting wires with different orientations into a single multifunctional instrument. This universal device can perform cutting in multiple directions without requiring removal or repositioning, as all directional capabilities are embodied in one device that remains in place throughout the procedure
Solution Approach 2:
The device is designed with all cutting wires pre-positioned and ready for deployment in their respective directions. The wires are constrained within the device body until needed, at which point they can be selectively advanced to their cutting positions, eliminating the need for repeated device manipulation and reducing tissue trauma from multiple insertions and repositioning maneuvers
Data Source
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AI summary
Disclosed herein are devices and methods for forming multidirectional cuts in tissue. The tissue cutting devices disclosed herein generally include a flexible elongate member with at least first and second wires that are at least partially constrained within or along a portion of the member. A distal portion of the wires is anchored on or within a portion of the elongate member. When tension is applied to one of the wires, such as by an actuator at a proximal end of the device, the elongate member bows while an unconstrained portion of the wire becomes exposed relative to the adjacent portion of the elongate member, assuming a tissue-cutting configuration.