Translation of "Covered stent" in German

After several bougienages a covered Z- stent is implanted.

Covered Z-Stent (See also Stent discriptions)

Also in this variant the balloon is preferably coated beyond the surface covered by the stent.

The elongated wire part provided with the radially expandable wire portions is inserted through a guide part, such as a cystoscope, which can optionally have a second working channel, a catheter, a tubular part, a hollow stylet or the like, in blood vessels, the urethra or the like, into the vicinity of the stent and namely to just in front of the stent if the latter is to be further advanced or behind the stent if the latter is to be retracted, or solely into the area covered by the stent.

Upon correct placement, the implant is unfolded by retracting the microcatheter and definitively fixed and stabilized by the aid of a stent so that the functionality of a covered stent is achieved.

This side-body portion 75 of stent wire mesh 67 and implant material 71 represents a covered stent graft, which is preferably only implanted into this position in vivo, that is to say once the main body 52 has already been implanted into the main vessel.

The method is also suitable for producing implants, in particular stents with completely covered cells, for example for producing a completely covered stent to arrest vascular bleeding.

It occurs also in this case, that the stent covered surface, which solely accounts for about 0.84% of the total test surface, causes a significant and reproducable effect on the platelet content.

Attempts have already been made, in cases in which removal of the continuity of the gastrointestinal tract is not possible, to seal anastomosis insufficiencies using an endoscopically placed endoluminal covered stent, in particular made of metal (self-expandable metal stents with a plastics material sheath).

Sealing by a covered stent is caused when the stent deploys and its outside is pressed against the intestinal wall.

Covered stents save lives.

The inhibitor film 15 is represented by a full-surface heparin layer which is able to bond oxalate ions stably, thus producing an inert cover for the stent surface.

Of course there is also the option to embed one or more active agents into the biodegradable material, i.e. into the stent itself, and to cover the stent additionally with an active agent or with a polymeric or non-polymeric carrier containing one or more active agents.

The hemocompatible coating directly covering the stent includes preferably of heparin of native origin and also of synthetically produced derivatives with different degrees of sulfation and acetylation in the molecular weight range from the pentasaccharide responsible for the antithrombotic effect up to the standard molecular weight of commercially available heparin, heparan sulfates and their derivatives, oligo- and polysaccharides of the erythrocyte glycocalix reproducing perfectly the athrombogenic surface of erythrocytes, since here in contrast to phosphorylcholine the real contact between blood and erythrocyte surface takes place, oligosaccharides, polysaccharides, completely desulfated and N-reacetylated heparin, desulfated and N-reacetylated heparin, N-carboxymethylated and/or partially N-acetylated chitosan, polyacrylic acid, polyvinylpyrrolidone and/or polyethylene glycol as well as compositions of these substances.

The published prior art WO 03/087443 A1 describes a fiber-like covering for a stent, which is applied onto the supporting structure by way of electrospinning.

The present invention is based on the finding that a premature detachment of the active ingredient-carrying coating from the base body of the stent can be prevented particularly effectively in that the entire base body, including the active ingredient-carrying coating, is coated both on the luminal and the abluminal side with a biocorrodible protective layer covering the stent in a form-fitting manner.

Complete covering of the stent surface by magnesium stearate can occur as a result in the solution, which also penetrates the surface structures and undercuts.

The outer tubing 68 has been pushed so far over the crimped stent 3 that it meets the stop 69 behind the tip 65 and it follows that it now covers the entire stent region 61 .

When applied to vessels of the craniocebral base, this concept has hitherto usually failed because available covered stents or their introducer kits are not flexible enough to be able to push them forward into diseased vessel segments.

The medical device (100) of any one of Claims 1 to 14, wherein the funnel (300) is configured to invert in conveyor belt fashion to cover the stent (202).

In this way, the inadequate sealing of conventional covered stents, such as in the case of incongruity of intestinal lumens, can be compensated.

As explained in detail above, so-called covered self-expanding stents that are used for treating leaks in the gastrointestinal tract, can be equipped with open-cell film.

The main point in dispute in the infringement proceedings between Medinol (patent proprietor) and Abbott (alleged infringer) was whether the claims would also cover in-phase stents in which the problem underlying the patent at issue does not occur and which thus do not use the compensation mechanism provided by the claimed invention.