Endoscopic Stitching Device Segmentation
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Solution Overview
Problem
Endoscopic suturing and stitching are challenging due to the small openings through which bodily organs or tissues must be sutured during surgical procedures, necessitating a simple and effective device for these tasks.
Innovation Solution
An endoscopic stitching device comprising a handle assembly and an elongate shaft assembly, with movable blade control members, blade drive members, an axial rod, and an end effector with jaws and needle receiving blades, allowing for precise control and detachment for enhanced usability and sterilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional suturing device is used through small endoscopic openings, then the device can perform suturing functions, but the device becomes complex and difficult to operate due to spatial constraints
Solution Approach 1:
The device is divided into separate functional modules: a handle assembly containing control members, an elongate shaft assembly containing blade drive members, and a detachable end effector. This segmentation allows each component to be optimized independently and simplifies operation through modular control mechanisms that can be manipulated through small endoscopic openings.
Solution Approach 2:
The blade drive members are received within longitudinal grooves of the blade control members, and the end effector is detachably coupled with the elongate shaft assembly. This nested arrangement allows compact packaging of components while maintaining accessibility through small openings, reducing the overall profile of the device.
2Reliability
If the device is made detachable for sterilization, then reusability is improved, but the device complexity increases
Solution Approach 1:
The device is segmented into a handle assembly and an elongate shaft assembly that can be detachably coupled. This allows the elongate shaft assembly to be removed and sterilized separately from the handle, improving reusability while maintaining a relatively simple connection interface that does not significantly increase overall device complexity.
3Manufacturing precision
If blade control members are made movable relative to each other, then precision control is improved, but the device complexity increases
Solution Approach 1:
The blade control members are designed to be movable relative to each other along the longitudinal axis, allowing dynamic adjustment of the blade positions. This dynamic capability enables precise control of needle receiving blade engagement while using a simple mechanical linkage system that does not significantly increase device complexity.
Data Source
AI summary
An endoscopic stitching device includes a handle assembly having a main rod and first and second blade control members, and an elongate shaft assembly having first and second blade drive members, an axial rod, and an end effector. The first and second blade drive members are received in respective first and second grooves of the first and second blade control members and rotated about the first and second blade control members to be secured with a circumferential groove of the first and second blade control members, such that the first and second blade control members are movable with the respective first and second blade drive members. The axial rod is detachably coupled with the main rod for concomitant movement therewith. The end effector includes jaws operatively coupled with the axial rod, and needle receiving blades operatively coupled with the respective first and second blade drive members.