Barbed Pin Wound Closure with Depth Stop
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Solution Overview
Problem
Current medical devices for closing wounds during minimally invasive surgical procedures lack ease of use and effectiveness in securely sealing incisions, leading to potential hernias and adhesions.
Innovation Solution
A wound closure device featuring an elongated body with a depth stop and radially extending barbs, made from absorbable or non-absorbable materials, designed to limit insertion depth and securely fasten tissue on both sides of a wound, with movable barbs and varying geometries for enhanced grip and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional fastening devices are used for wound closure, then tissue approximation is achieved, but the device complexity and difficulty of operation increase
Solution Approach 1:
The device is divided into two separate sections (first section and second section) that can be independently inserted through the wound, with barbs on each section engaging opposite tissue edges. This segmentation simplifies the insertion process and reduces operational complexity while maintaining effective wound closure.
Solution Approach 2:
Instead of using a single complex device inserted from one side, the invention uses two simpler sections inserted from opposite sides of the wound, each with barbs oriented to engage tissue in the opposite direction. This inversion of the traditional single-sided approach simplifies the overall device design and ease of operation.
2Reliability
If barbed pins are used to securely fasten tissue, then wound closure reliability is improved, but the insertion depth control and tissue damage risk increase
Solution Approach 1:
The depth stop feature is pre-configured on the device to automatically limit insertion depth before the barbed sections engage the tissue. This preliminary action prevents over-insertion and potential tissue damage while ensuring the barbs are positioned at the optimal depth for reliable wound closure.
Solution Approach 2:
The barbs are strategically positioned and oriented on each section to engage only the necessary tissue depth for secure fastening. The local quality of the barb configuration ensures reliable closure while minimizing unnecessary tissue penetration and potential damage.
3Object-affected harmful factors
If absorbable materials are used for the elongated body, then biocompatibility is improved, but the device strength and durability decrease
Solution Approach 1:
The device allows selection of different material parameters including absorbable, non-absorbable, or combination materials for different sections. This parameter change enables optimization of both biocompatibility and strength based on specific surgical requirements, with the ability to transition from non-absorbable (stronger) to absorbable (more biocompatible) as healing progresses.
Solution Approach 2:
The device can be constructed using composite material configurations where different sections use different materials (absorbable or non-absorbable). This composite approach allows the structure to maintain strength when needed while providing biocompatibility benefits, with materials that can be selected or combined based on the specific surgical application and patient needs.
Data Source
Figure 1~1B
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AI summary
A wound closure device includes an elongated body, a depth stop, and one or more barbs. The elongated body has first and second ends. The ends are configured and dimensioned for insertion within tissue on opposed sides of a wound. The depth stop is positioned on the elongated body to limit the insertion depth of at least a portion of the elongated body within tissue. The one or more barbs extend radially from the elongated body and define an inner surface. The inner surface includes a first portion, a second portion, and a third portion. The first portion is disposed at a first orientation relative to a longitudinal axis of the elongated body. The second portion is disposed at a second orientation relative to the longitudinal axis. The third portion disposed at a third orientation relative to the longitudinal axis.