Endoscopic Arc Needle Drive Assembly for Compact 360° Suturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing endoscopic suturing instruments, particularly those using C-type arc needles, are expensive, complex, and limited in application, especially under flexible endoscopes, with low reliability and high manufacturing costs, and lack diversity in suturing methods compared to surgical endoscopes.
Innovation Solution
An endoscopic needle driving assembly with a housing assembly, rotating body, driving assembly, control member, snap-fit member, and limiting member, allowing the arc-shaped suturing needle to rotate 360° relative to the housing assembly, facilitated by a simple and compact design that can be used with both rigid and flexible endoscopes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If C-type suturing instrument with connecting rods and double wheels is used, then suturing function is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The instrument is divided into functional modules: handle assembly, transmission assembly, and needle assembly. Each module performs a specific function, allowing independent optimization and simplification of individual components while maintaining overall system reliability for suturing operations.
Solution Approach 2:
The patent extracts and eliminates unnecessary transmission components from conventional C-type instruments. By using a simplified transmission mechanism with fewer parts, the patent achieves the same suturing function with reduced structural complexity and lower manufacturing cost.
2Ease of operation
If conventional suturing instrument with large operation space requirement is used, then suturing can be performed, but applicability in confined endoscopic spaces is limited
Solution Approach 1:
The needle assembly is designed to operate in a compact configuration that fits within the limited space of flexible endoscope working channels. The transmission assembly uses a space-efficient gear mechanism that allows rotational motion in a confined cylindrical space, enabling arc needle rotation without requiring large operational space.
Solution Approach 2:
The arc needle is nested within the needle assembly housing, and the transmission assembly is integrated into the handle assembly. This nested configuration allows the instrument to maintain a compact profile while preserving the functional space needed for needle rotation and suturing operations within the endoscope's working channel.
3Reliability
If metal endoscopic clip is used for suturing, then wound closure is achieved, but suturing strength and reliability are insufficient
Solution Approach 1:
The arc needle with suture thread performs self-guiding through the tissue, creating secure sutures that provide high strength and reliability. The suture material itself serves as the cutting and securing mechanism, eliminating the need for complex metal clip mechanisms while achieving superior wound closure strength.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present application provides a needle driving assembly under an endoscope, and a suturing device. The needle driving assembly under an endoscope comprises: a housing assembly, an arc-shaped suture needle, a rotating body, a driving assembly, a control member, a snap-fitting member and a limiting member. The control member cooperates the driving assembly to control the rotating body to rotate, and the rotating body drives the snap-fitting member to rotate in a first direction or a second direction, so that the arc-shaped suturing needle rotates by one circle relative to the housing assembly, so as to thread human tissue with a needle one time. The structure has a rational design, is compact, and is convenient to use, and by means of cooperation of the rotating body, the driving assembly, the control member, the snap-fitting member and the limiting member, the arc-shaped suturing needle is driven to rotate by 360 degrees repeatedly relative to the housing assembly, so as to achieve the suturing of the human tissue, thereby improving operation efficiency. In addition, the movement direction of the control member is at least partially perpendicular to the rotation direction of the rotating body and the arc-shaped suturing needle, thereby conveniently observing the suture state of the arc-shaped suturing needle and adapting to the suture operation under a flexible or rigid endoscope.