Tri-bending Sphinctertome for 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 cause unnecessary distress to tissues when forming multidirectional incisions, particularly in delicate areas like the stomach wall.
Innovation Solution
A flexible elongate member with multiple tissue-cutting wires that can be selectively tensioned to change configuration, allowing for the formation of multidirectional cuts by bending and exposing cutting wires in different directions, facilitating efficient tissue cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a needle knife and sphinctertome are used to form multidirectional incisions in tissue, then the incision can be formed, but the procedure is time consuming and causes unnecessary distress to the tissue
Solution Approach 1:
The patent combines multiple cutting wires (first, second, and third wires) into a single integrated device that can form multidirectional incisions simultaneously or sequentially. This merging of multiple cutting functions into one device eliminates the need for repeated insertions of separate needle knife and sphinctertome instruments, thereby reducing procedure time and minimizing tissue distress from multiple access manipulations.
Solution Approach 2:
The device employs movable and adjustable wire configurations that can be dynamically positioned to create incisions in multiple directions from a single access point. The wires can be independently actuated to bend or extend in different orientations, allowing the surgeon to form multidirectional incisions without repositioning the entire device, thus improving efficiency and reducing tissue manipulation.
2Adaptability or versatility
If multiple separate instruments are used to form multidirectional cuts, then complete incisions can be achieved, but the procedure complexity and time increase
Solution Approach 1:
The patent creates a universal device that performs multiple cutting functions through a single instrument. The device incorporates multiple wires that can be independently activated to create incisions in various directions, making it capable of replacing several separate instruments (needle knife, sphinctertome, and additional cutting tools) with one multi-functional device, thereby reducing procedural complexity while maintaining versatility.
Solution Approach 2:
The device nests multiple cutting wires within a single elongate member or catheter structure. The first, second, and third wires are contained within the same delivery system, allowing them to be advanced and positioned independently while originating from a single access point. This nesting arrangement consolidates multiple cutting functions into one instrument, reducing the number of separate devices needed.
Data Source
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, second, and third 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 at least 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.