Pre-configured Knot Delivery Device for Minimally Invasive Suture Securing

Solution Overview

Problem

Conventional methods for closing percutaneous access openings during minimally invasive procedures are inefficient and require high surgical skill, leading to potential complications and prolonged recovery times due to the need for manual knot tying.

Innovation Solution

A knot delivery device with a pre-configured knot and a suture snare that captures and tightens suture material, allowing for efficient and reproducible knot formation and deployment to secure sutures, reducing the need for manual knot tying.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual knot tying is used to secure sutures, then hemostasis can be achieved, but the procedure requires high surgical skill and takes significant time

Engineering Contradiction:

Improvehemostasis reliabilityVSAvoidsurgical skill requirement

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The knot is pre-formed and pre-configured on the suture material before insertion into the patient's body. This preliminary action eliminates the need for complex manual knot tying during the procedure, reducing surgical skill requirements while maintaining hemostasis reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A delivery device acts as an intermediary tool to carry the pre-configured knot through the skin and position it at the target site. The device includes a lumen system that guides the suture and knot through the tissue tract, simplifying the overall procedure

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If manual knot tying is used to secure sutures, then hemostasis can be achieved, but recovery time is prolonged

Engineering Contradiction:

Improvehemostasis reliabilityVSAvoidrecovery time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The knot is pre-formed and pre-configured on the suture material before insertion into the patient's body. This preliminary action eliminates the need for complex manual knot tying during the procedure, reducing surgical skill requirements while maintaining hemostasis reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The pre-configured knot delivery system allows the surgeon to skip the time-consuming manual knot tying step entirely. The knot is already formed and can be delivered directly to the target site through the delivery device, significantly reducing procedure time and facilitating faster recovery

Inventive Principle:

Principle #21Skipping (Rushing through)

3Reliability

If manual knot tying is used to secure sutures, then hemostasis can be achieved, but complications may occur

Engineering Contradiction:

Improvehemostasis reliabilityVSAvoidcomplication risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The knot is pre-formed and pre-configured on the suture material before insertion into the patient's body. This preliminary action eliminates the need for complex manual knot tying during the procedure, reducing surgical skill requirements while maintaining hemostasis reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The pre-configured knot design includes features that ensure reliable cinching and securement before the suture is fully deployed. This beforehand preparation cushions against potential complications by ensuring the knot will function properly once delivered, reducing the risk of hemostasis failure

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS11779325B2Knot delivery device

Publication Date: 2023.10.10 TERUMO MEDICAL CORP

AI summary

A knot delivery device for securing a suture comprises an elongated body having a proximal end and a distal end, a pre-configured knot disposed at the distal end of the elongated body, a suture snare having a snare configured to capture suture material, wherein the snare extends through the pre-configured knot and a suture locker secured to one end of material forming the pre-configured knot, wherein tension applied to the suture locker tightens the pre-configured knot.