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Hemodialysis arterio-venous graft with a ring-like diameter-adjustable device

A graft and vein technology, applied in dialysis system, tourniquet, medical science, etc., can solve problems such as thrombosis, poor blood flow, ischemic tissue loss, etc.

Inactive Publication Date: 2011-06-08
THE GENERAL HOSPITAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technique is that dialysis patients with frequent use of grafts may have thrombosed grafts due in part to poor blood flow
Another disadvantage of this technique is that dialysis patients sometimes experience ischemia of the hand due to high blood flow into the graft (arterial steal syndrome)
Excessive blood flow to the graft resulting in less blood flow to the extremities, causing ischemia and / or tissue loss in the hand or leg

Method used

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  • Hemodialysis arterio-venous graft with a ring-like diameter-adjustable device
  • Hemodialysis arterio-venous graft with a ring-like diameter-adjustable device
  • Hemodialysis arterio-venous graft with a ring-like diameter-adjustable device

Examples

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Embodiment Construction

[0060] Referring to FIG. 1 , an arteriovenous graft 18 from a right brachial artery 1 to a right cubital vein 2 is shown. Artery-vein graft 18 is shown in right arm 5 with arterial interface 3 at artery 1 and venous interface 4 at vein 2 . By using an artery-vein graft 18 in a hemodialysis patient as shown in Figure 2, a further channel for blood flow is created. The graft 18 serves as an artificial vessel into which the needle 9 can be repeatedly inserted to allow blood to flow out of the patient's bloodstream. The blood is then returned to the patient's bloodstream after having passed through the hemodialysis machine. The arteriovenous graft 18 is typically buried shallowly under the patient's skin. In Fig. 2, a hemodialytic arteriovenous graft 18 and a hemodialysis circuit are shown. Hemodialysis generally involves passage of blood from an artery through a dialysis machine, illustrated in FIG. 2 by a pump 6 and an artificial kidney 7 . A dialysis machine removes impurit...

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PUM

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Abstract

A ring device is integrated externally onto and around a regular hemodialysis arterio-venous graft conduit. The ring device is adjustable to reduce or to normalize (by rebounding) the diameter of the graft, and eventually to change blood flow through the graft. This ring device is designed such that it can be scaled up or down to change its diameter, and simultaneously the diameter of the associated graft prior to and even after its implantation into a patient's arm or leg. Since a hemodialysis arterio-venous graft is usually implanted superficially underneath skin, the device and its adjustable parts can be electively or urgently located and operated from outside by touching and pushing the skin, subcutaneous tissues and the device without a surgical incision. The ring device can be located anywhere within the graft and can function with a single ring or as a set of multiple rings.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Patent Application 61 / 061402, filed June 13, 2008. [0003] Statement Regarding Federally Sponsored Research and Development [0004] none technical field [0005] The present invention relates generally to the field of hemodialysis devices, and in particular to hemodialysis arteriovenous grafts having a ring device for adjusting the inner diameter of the arteriovenous graft. Background technique [0006] Twenty-six million Americans have chronic kidney disease. While some of these patients undergo treatment to maintain some kidney function, some patients have completely lost their kidney function (known as end-stage renal disease) and are dependent on artificial kidneys to survive through hemodialysis. In the United States, approximately 400,000 patients with end-stage renal disease are currently receiving hemodialysis. The cost of hemodialysis is approximately $26 billion pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/14
CPCA61M1/3655A61B17/1322A61B2017/00778
Inventor S·吴
Owner THE GENERAL HOSPITAL CORP
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