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US 8,282,591 B2Granted
Hybrid arteriovenous shunt
OwnerIftikhar Khan, Nazir Khaninventors
Life of this patent
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Abstract
An apparatus for positioning a graft and catheter operable for subcutaneous access to the vascular system of a patient. A surgically created, hybrid arteriovenous shunt is provided which comprises a flexible graft and a venous outflow catheter connected to the graft via surgical anastomosis over a cuff. The graft is connected to an arterial source and then to a single lumen venous outflow catheter which deposits dialyzed blood directly into the heart at the right atrium. Methods of surgical placement and performing hemodialysis using embodiments of the apparatus are provided.
Claims20
An arterio venous shunt comprising:
- a. An arterial graft comprising a body, a lead end and a terminal end, said lead end being configured for subcutaneous connection to an artery by anastomosis, wherein said arterial graft has a first diameter of about 2-8 mm;
- and
- b. a single lumen venous outflow catheter comprising an intake end and depositing end, said depositing end being configured for insertion through a vein into the right atrium of the heart, wherein said venous outflow catheter has a second diameter of about 1-7 mm, different from said first diameter;
- and
- c. a cylindrical cuff, operable to direct passage of blood from said arterial graft to said venous outflow catheter, said cuff comprising an inlet in blood communication with an outlet:
- i. Said inlet being disposed about and connected to said terminal end of said arterial graft;
- and
- ii. Said outlet being disposed about and connected to said intake end of said venous outflow catheter;
- wherein said cuff provides a secure fit for said arterial graft first diameter and said venous outflow catheter second diameter.
6 more elements
A system for performing hemodialysis on a patient comprising:
- a. an arterio venous shunt comprising:
- i. An arterial graft comprising a body, a lead end and a terminal end, said lead end being configured for subcutaneous connection to an artery by anastomosis, wherein said arterial graft has a first diameter of about 2-8 mm;
- and
- ii. A single lumen venous outflow catheter comprising an intake end and depositing end, said depositing end being configured for insertion through a vein into the right atrium of the heart, wherein said venous outflow catheter has a second diameter of about 1-7 mm ,different from said first diameter;
- and
- iii. A cylindrical connecting cuff operable to direct passage of blood from said arterial graft to said venous outflow catheter, said cuff comprising an inlet with blood communication with an outlet:
- 1. Said inlet being disposed about and connected to said terminal end of said subcutaneous graft;
- and
- 2. Said outlet being disposed about and connected to said intake end of said venous outflow catheter;
- wherein said cuff provides a secure fit for said arterial graft first diameter and said venous outflow catheter second diameter.
7 more elements
A method of performing hemodialysis on a patient comprising:
- a. Surgically inserting an arteriovenous shunt into a patient, wherein said arterio venous shunt comprise
- i. An arterial graft comprising a body, a lead end and a terminal end, said lead end being configured for subcutaneous connection to an artery by anastomosis, wherein said arterial graft has a first diameter of about 2-8 mm;
- and
- ii. A single lumen venous outflow catheter comprising an intake end and depositing end, said depositing end being configured for insertion through a vein into the right atrium of the heart, wherein said venous outflow catheter has a second diameter of about 1-7 mm different from said first diameter;
- and
- iii. A cylindrical cuff operable to direct passage of blood from said arterial graft to said venous outflow catheter, said cuff comprising an inlet in blood communication with an outlet:
- I. Said inlet being disposed about and connected to said terminal end of said arterial graft;
- and
- II. Said outlet being disposed about and connected to said intake end of said venous outflow catheter, wherein said cuff provides a secure fit for said arterial graft first diameter and said venous outflow catheter second diameter;
- b. connecting said arterial graft to a hemodialysis apparatus;
- c. collecting blood from the patient through said arterial graft with a dialysis cannula;
- d. passing said blood through the hemodialysis apparatus;
- e. collecting purified blood from hemodialysis apparatus with a dialysis cannula to the graft ;
- and
- f. Transmitting said purified blood through said cuff into said venous outflow catheter which is located in the right atrium and the blood is directly deposited into the right atrium.
12 more elements
Dependencies are inferred from the claim text.