Prosthetic renal valve
First Claim
1. A method comprising:
- identifying a subject as suffering from a condition that causes the subject to have elevated renal venous pressure even in an absence of a condition that causes renal venous pressure of the subject to be elevated due to pressure being exerted on the subject'"'"'s renal vein through walls of the subject'"'"'s renal vein from a location outside the renal vein; and
in response thereto, reducing blood pressure within a renal vein of the subject relative to the subject'"'"'s central venous pressure, by placing a device at least partially within the subject'"'"'s renal vein, the device being configured, in a passive manner, to reduce venous pressure within the subject'"'"'s renal vein relative to central venous pressure of the subject.
1 Assignment
0 Petitions
Accused Products
Abstract
Apparatus and methods are described including a valve (34) that includes valve leaflets (33) and a non-branched valve frame (31) configured to support the valve leaflets, the frame defining a single longitudinal axis thereof, the longitudinal axis being a generally straight line along a full length of the frame. The valve (34) is placed at least partially within a renal vein of a subject. The valve defines an open state thereof in which the valve leaflets (33) allow generally unimpeded antegrade blood flow therethrough, and a closed state thereof in which the valve leaflets (33), in a passive manner, reduce venous pressure within the renal vein relative to central venous pressure of the subject. Other applications are also described.
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Citations
28 Claims
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1. A method comprising:
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identifying a subject as suffering from a condition that causes the subject to have elevated renal venous pressure even in an absence of a condition that causes renal venous pressure of the subject to be elevated due to pressure being exerted on the subject'"'"'s renal vein through walls of the subject'"'"'s renal vein from a location outside the renal vein; and in response thereto, reducing blood pressure within a renal vein of the subject relative to the subject'"'"'s central venous pressure, by placing a device at least partially within the subject'"'"'s renal vein, the device being configured, in a passive manner, to reduce venous pressure within the subject'"'"'s renal vein relative to central venous pressure of the subject.
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2. A method comprising:
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identifying a subject as suffering from a condition that causes the subject to have elevated central venous pressure; and in response thereto, reducing blood pressure within renal veins of the subject relative to the subject'"'"'s central venous pressure, by placing a first device at least partially in a left renal vein of the subject and placing a second device at least partially in a right renal vein of the subject, the devices being configured, in a passive manner, to reduce venous pressure within the subject'"'"'s renal veins relative to central venous pressure of the subject.
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3. A method comprising:
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identifying a subject as suffering from a condition that causes the subject to have elevated central venous pressure, the condition being selected from the group consisting of;
cardiac dysfunction, congestive heart failure, and kidney dysfunction; andin response thereto, reducing blood pressure within a renal vein of the subject relative to the subject'"'"'s central venous pressure, by placing a device at least partially within the subject'"'"'s renal vein, the device being configured, in a passive manner, to reduce venous pressure within the subject'"'"'s renal vein relative to central venous pressure of the subject. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A method comprising:
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identifying a subject as suffering from a condition that causes the subject to have elevated central venous pressure; and in response thereto, reducing blood pressure within a renal vein of the subject relative to the subject'"'"'s central venous pressure, by placing a valve at least partially within the subject'"'"'s renal vein, the valve being configured, in a passive manner, to reduce venous pressure within the subject'"'"'s renal vein relative to central venous pressure of the subject. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for use with renal veins and a vena cava of a subject, the method comprising:
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identifying a subject as suffering from a condition that causes the subject to have elevated central venous pressure; and in response thereto, reducing blood pressure within the subject'"'"'s renal veins relative to the subject'"'"'s central venous pressure, by placing a valve frame at least partially inside the subject'"'"'s vena cava, such that valve leaflets that are coupled to the valve frame are disposed in vicinities of ostia of junctions between the vena cava and the renal veins, and such that the valve leaflets are configured to; open in response to antegrade blood flow from the renal vein into the vena cava, and close in response to retrograde blood flow from the vena cava into the renal vein, such that, even when the valve leaflets are closed, blood flow through the vena cava is not occluded by the valve leaflets. - View Dependent Claims (26, 27, 28)
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Specification