News Column

Patent Issued for Vascular Endograft

September 1, 2014

By a News Reporter-Staff News Editor at Cardiovascular Week -- Khoury Medical Devices, LLC (St. George, UT) has been issued patent number 8808358, according to news reporting originating out of Alexandria, Virginia, by NewsRx editors (see also Khoury Medical Devices, LLC).

The patent's inventor is Khoury, Michael David (Shelby Township, MI).

This patent was filed on June 22, 2006 and was published online on August 19, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "Stent grafts have become a popular treatment option for aneurysms. Typically, a stent graft is delivered to a treatment site through endovascular insertion via an introducer or catheter. Subsequent radial expansion retains the graft in position relative to the vessel wall. In instances where an aneurysm is located along a length of vessel on which branch vessels are not present, a simple tubular cylindrical stent graft is suitable. Additionally, stent grafts are known to the art for treatment of aneurysms in aortic regions where the distal end of the graft bifurcates to define two lumens so as to extend into arterial branches. Such bifurcated stent grafts are well known for the treatment of ascending thoracic and abdominal aortic aneurysms. Exemplary stents of this kind are embodied in U.S. Pat. Nos. 6,695,875 B2 and 6,814,752 B1 and U.S. patent application Publication 2004/0230287 A1.

"Currently, aneurysms in certain anatomic regions of the aorta have proved difficult to properly repair with a stent graft. In particular, treatment of suprarenal aortic aneurysms has proved problematic. In such locales, the lack of a neck above the aneurysm precludes attachment of a conventional endovascular graft. Additionally, in the treatment of an aneurysm in such a locale, the preoperative measurement of arterial and aortic dimensional variables necessary to form a suitable endograft has proven to be complex. Any misfit in preparing a conventional stent graft to treat an aneurysm in this region results in lumenal obstruction or collapse, or material fatigue, resulting in continued blood flow into the aneurysm.

"WO 03/082153, FIGS. 7-11, is representative of the stent grafts for the treatment of suprarenal aortic aneurysms. This graft includes a single lumen containing a Gianturco type zigzag Z stent tube in communication at a distal end with an aperture in the lumen and free floating at the proximal end within the lumen. Unfortunately, the free-floating tube proximal end is prone to damage during insertion of a sleeve therefrom into an artery in registry with the aperture, as well as under hemodynamic operating conditions.

"Thus, there exists a need for a vascular endograft capable of treating an aneurysm in a vessel having adjacent vessel branches."

Supplementing the background information on this patent, NewsRx reporters also obtained the inventor's summary information for this patent: "An endograft for a vessel having a vascular branch extending from the vessel is provided. The endograft includes a main body having a wall separating interior and exterior surfaces and adapted to be inserted within the vessel. The main body is characterized by a single proximal opening and two distal openings and at least one aperture extending through the wall. At least one stent is secured to the main body that upon expansion pressure fits the main body into the vessel. An open tunnel is secured to the interior surface of the main body around the main body aperture and secured somewhere along the tunnel length to provide fluid communication between the interior and exterior surfaces of the main body through the aperture and with the vascular branch in proximity to the main body aperture. The tunnel is readily formed independent of an expandable stent. Through the addition of further apertures and tunnels, an endograft is well suited for revascularizing the celiac, superior mesenteric artery and renal arteries for the treatment of a suprarenal aortic aneurysm. The insertion of a sleeve positioned partly within the tunnel and extending beyond the exterior surface of the main body into the vascular branch assures continued fluid flow to the vascular branch. The two distal openings are adapted to engage the iliac arteries."

For the URL and additional information on this patent, see: Khoury, Michael David. Vascular Endograft. U.S. Patent Number 8808358, filed June 22, 2006, and published online on August 19, 2014. Patent URL:

Keywords for this news article include: Aneurysm, Angiology, Cardiovascular Diseases, Khoury Medical Devices LLC.

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Source: Cardiovascular Week

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