Endoscopic Suture Device Needle Control Mechanism

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Solution Overview

Problem

Current endoscopic suturing systems are bulky, complex, and costly, with high surgical risks due to inaccurate tissue penetration and the need for multiple instruments, leading to tissue damage and post-operative complications.

Innovation Solution

A suture device with a main shell, suture needle, needle feeding assembly, and needle anti-backoff assembly, allowing controlled advancement and prevention of retraction of the suture needle, integrated with an endoscope for minimally invasive procedures, enabling simple and efficient suturing and knotting without the need for spin-drilling and hooking devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a spin-drilling and hooking device is used to puncture and hook tissue, then tissue can be grasped and sutured, but the penetration depth cannot be accurately determined and outer tissue may be damaged

Engineering Contradiction:

Improvesurgical safetyVSAvoidtissue penetration control

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The needle feeding assembly pre-positions the suture needle at a controlled depth before tissue engagement, ensuring the needle tip reaches the target tissue without excessive penetration. The needle is fed incrementally through the main shell to the predetermined depth, eliminating the need for forceful spin-drilling that causes uncontrolled penetration and tissue damage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention replaces the spin-drilling and hooking mechanical action with a direct needle penetration and suture passing mechanism. The suture needle directly pierces the tissue and carries the suture line through, eliminating the complex spin-drilling device that caused tissue damage and unpredictable penetration depth.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If multiple instruments and devices are used for suturing, then suturing function can be achieved, but the system becomes bulky and complex

Engineering Contradiction:

Improvesuturing functionalityVSAvoidsystem structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention merges the suture needle, needle feeding mechanism, and needle retention features into a single integrated suture device that attaches to the endoscope. The main shell houses the needle feeding assembly and anti-backoff assembly, combining multiple functions into one compact unit that eliminates the need for separate spin-drilling devices, hooking devices, and wire knotters.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The suture device is designed as a multi-functional integrated system that performs needle feeding, needle retention, tissue suturing, and suture line management all through one device. The device can be attached to the endoscope and performs multiple suturing operations without requiring exchange of different specialized instruments.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If a wire knotter is inserted into the body to knot the suture line, then knotting can be achieved, but a foreign object is left inside the body causing post-operative risks

Engineering Contradiction:

Improveknotting capabilityVSAvoidpost-operative risks

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The suture device enables the surgeon to perform knotting operations using the existing suture needle and suture line without requiring a separate wire knotter device to be inserted into the patient's body. The knotting is accomplished by manipulating the suture line through the existing device components, eliminating the need to leave a foreign knotter device inside the body.

Inventive Principle:

Principle #25Self-service

4Ease of operation

If the suture needle cannot be prevented from retracting, then the needle can be easily repositioned, but precise control over needle position is lost

Engineering Contradiction:

Improveneedle repositioningVSAvoidneedle position control

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The needle anti-backoff assembly provides dynamic control of the suture needle position. The spring-loaded anti-backoff tooth engages with the needle to prevent retraction while allowing forward movement when needed. This creates a controllable system where the needle can be advanced to precise positions and then held firmly in place, providing both positional precision and operational flexibility.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20230165581A1Suture device, treatment device with suture device, and treatment system

Publication Date: 2023.06.01 ZHEJIANG ZUOYUAN MEDICAL TECH CO LTD

AI summary

The invention provides a suture device, a treatment device with the suture device and a treatment system. The treatment system includes an endoscope and the treatment system. The treatment system is used in cooperation with the endoscope and includes an operating handle and the suture device. The suture device comprises a main shell, a suture needle, a needle feeding assembly and a needle anti-backoff assembly. One end of the suture needle is connected to a suture line, and the other end is a tip. The needle feeding assembly is arranged on the main shell and forms a separable engagement relationship with the suture needle so as to control advancing of the suture needle. The needle anti-backoff assembly is arranged on the main shell and forms a separable engagement relationship with the suture needle so as to prevent the withdrawal of the suture needle.