Vena-caval device

• US 10,299,918 B2
• Filed: 02/02/2017
• Issued: 05/28/2019
• Est. Priority Date: 06/06/2012
• Status: Active Grant

• Current Assignee: Magenta Medical Ltd.
• Original Assignee: Magenta Medical Ltd.
• Inventors: Tuval, Yosi
• Primary Examiner(s): Baria, Dinah
• Application Number:
  US15/423,368
• Publication Number:
  US 20170143483A1
• Time in Patent Office: 845 Days
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2250/006 modular

Abstract

Apparatus and method are described including identifying a subject as suffering from a condition that causes the subject to have elevated central venous pressure. In response thereto, a device is placed inside the subject'"'"'s vena cava such that an upstream end of the device is placed at a location upstream of junctions of the vena cava with all of the subject'"'"'s renal veins. The device defines a passage through the device, at least a portion of the passage converging in a direction from an upstream end of the device to downstream end of the device. Other applications are also described.

Claims

1. A method for use with renal veins and a vena cava of a subject, the method comprising:

identifying the 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 directing antegrade blood flow through the subject'"'"'s vena cava past the subject'"'"'s renal veins, by placing a nozzle inside the subject'"'"'s vena cava, such that an upstream end of the nozzle is placed at a location upstream of junctions of the vena cava with one or more of the subject'"'"'s renal veins, the nozzle converging from the upstream end of the nozzle to a downstream end of the nozzle.

2. The method according to claim 1, further comprising placing an additional device within the vena cava at a location that is downstream of the junctions of the vena cava with one or more of the subject'"'"'s renal veins, the additional device being configured to direct blood flow through the vena cava in an antegrade direction.

3. The method according to claim 2, wherein placing the additional device within the vena cava downstream of the junctions of the vena cava with one or more of the subject'"'"'s renal veins comprises placing a valve inside the subject'"'"'s vena cava at the location that is downstream of the junctions of the vena cava with one or more the subject'"'"'s renal veins, the valve being configured to allow antegrade blood flow therethrough and to prevent retrograde blood flow therethrough.

4. A method for use with renal veins and a vena cava of a subject, the method comprising:

identifying a subject as suffering from a condition that causes the subject to have elevated central venous pressure; and

in response thereto, placing a device inside the vena cava such that an upstream end of the device is placed at a location upstream of junctions of the vena cava with one or more of the subject'"'"'s renal veins, the device defining a passage through the device, at least a portion of the passage converging in a direction from the upstream end of the device to downstream end of the device.

5. The method according to claim 4, wherein placing the device inside the vena cava such that the upstream end of the device is placed at the location upstream of junctions of the vena cava with one or more of the subject'"'"'s renal veins comprises placing a nozzle inside the vena cava such that an upstream end of the nozzle is placed at the location upstream of junctions of the vena cava with one or more of the subject'"'"'s renal veins.

6. The method according to claim 4, further comprising placing an additional device within the vena cava at a location that is downstream of the junctions of the vena cava with one or more of the subject'"'"'s renal veins, the additional device being configured to direct blood flow through the vena cava in an antegrade direction.

7. The method according to claim 6, wherein placing the device inside the vena cava such that the upstream end of the device is placed at the location upstream of junctions of the vena cava with one or more of the subject'"'"'s renal veins comprises placing a nozzle inside the vena cava such that the upstream end of the device is placed at the location upstream of junctions of the vena cava with one or more of the subject'"'"'s renal veins.

8. The method according to claim 6, wherein placing the additional device within the vena cava downstream of the junctions of the vena cava with one or more of the subject'"'"'s renal veins comprises placing a valve inside the subject'"'"'s vena cava at the location that is downstream of the junctions of the vena cava with the subject'"'"'s renal veins, the valve being configured to allow antegrade blood flow therethrough and to prevent retrograde blood flow therethrough.

9. The method according to claim 8, wherein placing the device inside the vena cava such that the upstream end of the device is placed at the location upstream of junctions of the vena cava with one or more of the subject'"'"'s renal veins comprises placing a nozzle inside the vena cava such that the upstream end of the device is placed at the location upstream of junctions of the vena cava with one or more of the subject'"'"'s renal veins.