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Improved end effectors for wound closure devices

A technology of sutures and tabs, applied in applications, surgical instruments, medical science, etc., can solve the problems of size limitation, unacceptable, easy to detect, etc.

Active Publication Date: 2022-04-15
ETHICON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are practical limitations in size, as end effectors with greater thickness or other dimensions may be unacceptable and / or noticeable during surgery, and thus are not advisable

Method used

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  • Improved end effectors for wound closure devices
  • Improved end effectors for wound closure devices
  • Improved end effectors for wound closure devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Example 1 - Desktop Instron test

[0081]Tensile testing of each suture was performed by benchtop Instron testing in custom metal fixtures in which custom metal test fixtures were sized and shaped for use with the suture and / or composite end effector. This test is more commonly known as the Shear Strength Test and for this example is considered the Fixed Tab Shear Strength Test since it measures the shear strength of the one or more fixed tabs being tested . The shear strength of each fixation tab was tested by loading each individual suture into a custom metal test jig. Each test specimen was introduced into the slot in the top plate of the jig so that the securing tab was immediately in contact with the underside of the plate and the free end of the suture was available on the top side of the plate. The free end of the suture was clamped under light tension (enough to keep the suture taut) with the upper Instron clamp to a gauge length of 1 inch. Center the sutur...

Embodiment 2

[0088] Example 2- Pig starting strength test

[0089] Initial strength is a different test than the shear strength test described in Example 1. During initial strength testing, the suture device is inserted through porcine fascial tissue with the proximal end of the fixation tab against the tissue and the free end of the suture is loaded into the Instron to be stretched to failure .

[0090] according to figure 1 and a comparative (nominal) suture was formed as explained in Example 1 with a stamped end effector that was not welded after formation. The second suture ("Invention 1") is formed from the same material and has the same dimensions, but with a single parallel end attachment (eg, Figure 3C to Figure 3D shown) welded to the end effector (the construction is as explained in Example 1). A third suture ("Invention 2") is formed from the same material and has the same dimensions, but two substantially identical parallel end attachments are welded to the tab, one above...

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Abstract

The present invention provides a suture set including an improved welded fixation at its distal end to provide improved retention strength during and after implantation of the suture into tissue. The welded fastening means may be a composite fastening tab comprising a first layer and a second layer welded to the first layer.

Description

technical field [0001] The present invention relates generally to the field of medical devices, and more particularly to barbed suture devices with improved end effectors. Background technique [0002] Many wounds and surgical incisions are closed using surgical sutures or other surgical closure devices. Self-retaining sutures, also known as barbed sutures, are well known and of interest for a variety of medical applications. Typically, self-retaining sutures are constructed from a series of retainers (also called "barbs" or "protrusions", used interchangeably herein) that extend outward from the suture and are used to increase the suture's retention strength And / or eliminate the need to tie knots. [0003] Some sutures and barbed sutures are known to include an end effector at the distal end of the suture to provide a "stop" at the end, which prevents the suture from being fully pulled through the tissue while also increasing the This improves suture retention strength a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/06
CPCA61B17/06166A61B2017/00526A61B2017/00964A61B2017/0417A61B2017/06176A61B2017/0619A61B17/0483
Inventor J.T.珀金斯J.纳罗基J.胡夫D.C.老林德
Owner ETHICON INC