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Method of loading stent into sheath

A technology on a sheath and a stent, which is applied in the field of inserting a stent into the sheath

Active Publication Date: 2014-02-26
ANGIOMED GMBH & CO MEDIZINTECHNIK KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, failure of the sheath components during deployment of the stent cannot be tolerated

Method used

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  • Method of loading stent into sheath
  • Method of loading stent into sheath
  • Method of loading stent into sheath

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] figure 1 A covered crimped stent 10 is shown for deployment from the loading sheath into the delivery sheath 12 by advancing the stent 10 in the loading tool 14 in the direction of arrow F into the lumen 16 of the sheath 12 .

[0040] The loading sheath is similar to a common stent deployment sheath, sized to be at least the length of the stent plus about 20% of the remaining length to provide an allowable loading area for the stent. It is typically a braided polymer catheter material, as is known in the art of stent delivery systems.

[0041] Stent 10 is a radially self-expanding Nitinol stent covered in an ePTFE membrane. The covered stent is constrained by a loading sheath 18 into a radially compressed configuration. The stent is mounted in the loading sheath 18 by a "crimping" procedure known per se, wherein clamps (not shown) compress the stent radially inwardly to its compacted configuration, so that the stent 10 and loading sheath 18 relative to each other (ty...

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PUM

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Abstract

A method of loading a self-expanding stent into a delivery sheath configured to retain the stent in a radially compressed pre-deployment configuration, including the steps of radially compressing the stent from a relaxed outside diameter d0 to a compressed outside diameter d1, providing a loading sheath with an inner diameter d2, where d0>d2>d1, translating the stent relative to the sheath, whereby the stent is accommodated within the lumen of the loading sheath, providing a delivery sheath with an inner diameter d3, where d0>d3>d2, advancing the loading sheath, containing the stent, into the lumen of the delivery sheath, and deploying the stent into the lumen of the delivery sheath.

Description

technical field [0001] The present invention relates to a method of enclosing a self-expanding stent in a delivery sheath, which is part of a catheter that transports the stent across a lumen to a deployed position in a patient, wherein the stent is removed by removing The restriction of radial expansion is deployed at this location, which restriction is provided by the sheath up to this point. [0002] Stent designers have successfully created increasingly complex stents and stent grafts for positioning in more and more places in the body. Consequently, there is pressure on designers of stent delivery systems to catch up with catheter designs that will meet more and more requirements in order to deliver these stents to the appropriate location in the body. [0003] A common method for expressing stent diameters is in "French" units. 1French is a third of a millimeter. Thus, a stent delivery system with a "6 French" passage diameter has an outer diameter of 2mm. For manufa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/95A61F2/966A61F2/97A23L33/00
CPCA61F2/97A61F2002/9511A61F2/966A61F2002/9522A61F2/95A61F2/9522A61P35/00
Inventor J·多恩
Owner ANGIOMED GMBH & CO MEDIZINTECHNIK KG