METAL STENT FOR TREATING LESIONS IN BLOOD VESSELS, COMPRISING A PACKAGING

• US 20110178590A1
• Filed: 06/09/2009
• Published: 07/21/2011
• Est. Priority Date: 07/04/2008
• Status: Active Grant

• Current Assignee: Qvanteq AG
• Original Assignee: Qvanteq AG
• Inventors: Zucker, Arik
• Granted Patent: US 8,584,852 B2
• Time in Patent Office: Days
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/0095 Packages or dispensers for prostheses or other implants for intraocular lenses A61F2/1691; for dental surgery A61C19/02
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/9524 Iris-type crimpers
• CPC Class Codes: A61F 2/9526 using a mandrel
• CPC Class Codes: A61F 2250/0092 Means for cleaning prostheses

Abstract

The system according to the present disclosure includes a metal stent (3) as a medical implant for treating lesions in blood vessels and a packaging (1) having an inside volume, in which the stent (3) is arranged in a protected manner. The stent (3) has a plurality of webs (33), which produce a tubular shape with each other, and a proximal end (31) and a distal end (32), between which a stent lumen (34) extends. The stent surface (35) has a hydrophilic property. The molecular chemical impurities originating in the atmosphere, primarily hydrocarbon compounds, are significantly reduced on the surface by a treatment, whereby the contact angle as a measure of the hydrophilicity of a water drop present on the surface (35) is reduced in proportion to the contact angle prior to said treatment. The stent (3) is stored in an inert manner in the packaging (1).

Claims

1. An arrangement, including a metallic stent as a medical implant for treating lesions in blood vessels and a packaging, with an interior volume, in which the stent is arranged in a protected fashion, wherein

a) the stent comprises:

aa) a multiplicity of webs, which together form a tubular shape;

ab) a proximal end and a distal end, with a stent lumen extending therebetween; and

ac) a surface with a hydrophilic property, wherein

b) molecular chemical contaminants originating from the atmosphere, mainly hydrocarbons, are significantly reduced on the surface by a treatment, as a result of which, as a measure of the hydrophilicity, the contact angle of a water droplet situated on the surface is reduced compared to the contact angle before this treatment; and

wherein

c) the stent is stored in an inert fashion in the packaging in order to prevent natural recontamination from the atmosphere.

2. The arrangement as claimed in claim 1, wherein the treatment of the surface for reducing the chemical contamination is carried out as material ablation.

3. The arrangement as claimed in claim 2, wherein the treatment is carried out by means of sputtering as ion bombardment, electric discharge machining, electrolytic polishing, plasma activation, laser ablation, mechanically abrasive methods, dry etching or wet-chemical etching.

4. The arrangement as claimed in claim 1, wherein the result of the treatment of the surface for reducing the chemical contamination is an unchanged topography of the surface.

5. The arrangement as claimed in claim 4, wherein the treatment is carried out by means of sputtering as ion bombardment, electric discharge machining, electrolytic polishing, plasma activation, laser ablation, mechanically abrasive methods, dry etching or wet-chemical etching.

6. The arrangement as claimed in claim 4, wherein the treatment does not ablate material, e.g. by means of ultrasound, UV light or ozone, or a combination treatment formed therefrom, or is carried out by means of an etching medium that does not corrode the stent material itself.

7. The arrangement as claimed in claim 1, wherein the entire content of the packaging is inert and the packaging contains an inert filling.

8. The arrangement as claimed in claim 1, further comprising

a) a catheter arranged in the packaging and the stent mounted on the catheter, wherein

b) a balloon catheter or a tube catheter is assigned in a complementary fashion to a balloon-expanding or a self-expanding stent.

9. The arrangement as claimed in claim 1, wherein

a) the packaging includes a container with a base and a cover;

wherein

b) the base and/or the cover is removable; and

/or

c) the base and/or the cover include an access to be opened;

such that

d) the stent is removable from the packaging;

or

e) the stent mounted on a catheter is removable from the packaging together with the catheter.

10. The arrangement as claimed in claim 8, wherein

a) the catheter has a tip at its distal end;

and

b) the proximal end of the shaft of the catheter opposite the tip protrudes through the access to outside of the packaging.

11. The arrangement as claimed in claim 9, further comprising

a) a passage formed in the base or in the cover for allowing a shaft to pass, which shaft leads to the jaws of an integrated crimping apparatus toward the inside, into the packaging, and leads to an activator for actuating the crimping apparatus toward the outside;

b) the access to be opened is opposite the passage in the cover or in the base, which access serves to let a catheter pass; and

c) a guide mandrel extends through the crimping apparatus in the axial direction and it is used for stabilization and positioning purposes after it has been completely inserted into a guide wire lumen of the catheter.

12. The arrangement as claimed in claim 9, wherein the access to be opened is made of a penetrable seal or a perforatable material.

13. The arrangement as claimed in claim 8, wherein support elements for fixing the stent and/or the catheter and/or the crimping apparatus extend within the packaging.

14. The arrangement as claimed claim 1, wherein the stent is embodied with a cover to form a stent graft for the application in the case of aneurysms.