Device and system for filtering blood

• US 8,617,392 B2
• Filed: 01/10/2012
• Issued: 12/31/2013
• Est. Priority Date: 05/17/2002
• Status: Expired due to Fees

• Current Assignee: Gambro Lundia AB (Baxter International Inc.)
• Original Assignee: Gambro Lundia AB (Baxter International Inc.)
• Inventors: Nilsson, Anders
• Primary Examiner(s): Kim, John
• Application Number:
  US13/347,074
• Publication Number:
  US 20120116283A1
• Time in Patent Office: 721 Days
• Field of Search: 210/645, 210/646, 210/650, 210/651, 210/109, 210/114, 210/195.2, 210/252, 210/256, 210/257.1, 210/257.2, 210/321.6, 210/321.65, 210/321.78, 210/321.79, 210/321.8, 210/321.87, 210/321.88, 210/321.89, 210/433.1, 210/436, 210/472, 210/473, 210/477, 422/44, 604/4.01, 604/5.01, 604/6.09, 604/6.15, 604/403, 604/404, 604/405, 604/408
• US Class Current: 210/321.65
• CPC Class Codes: A61M 1/34 Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration
• CPC Class Codes: A61M 1/341 by measuring the filtrate rate or volume
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2209/088 on the body

Abstract

Device (5) for filtering blood including a filter unit (7) having a blood filter, an inlet (8) for blood to be filtered and being connectable to an artery of a patient and a blood outlet (9) for filtered blood and being connectable to a vein of the patient, and having a filtrate container (6,14), that encloses the filter unit (7), for receiving filtrate (12) passing through the blood filter during a filtering process and that the filtrate container (6,14) is a closed container, which in a filled state is arranged to establish a counter-pressure over the blood filter, whereby the filtering process is interrupted. The invention also concerns a system including the above device.

Claims

1. A device for filtering blood comprising:

a filter unit having an inlet for blood to be filtered and being connectable to an artery of a patient and a blood outlet for filtered blood and being connectable to a vein of the patient, and

a filtrate container for receiving a filtrate filtered from the blood passing through the filter unit during a filtering process, said filtrate container enclosing the filter unit,

the filtrate container being a closed container which, during the filtering provides room for filtrate received through walls of the filtering unit and, the filtrate container in a filled state, establishing a counter-pressure over the walls of the filter unit so that the filtering process is interrupted, wherein the filtrate container includes a flexible, expandable container which is collapsed in an empty state.

2. The device according to claim 1, wherein the flexible, expandable container is enclosed in an outer, substantially rigid container.

3. The device according to claim 1, wherein the filtrate container with the filter unit is a one-way, disposable unit.

4. The device according to claim 1, wherein the filter unit comprises a substantially tubular filter body.

5. The device according to claim 1, wherein the filter unit is an ultra filtration filter.

6. The device according to claim 1, wherein a filtrate volume of the filtrate container is chosen between about 0.2-1 liter.

7. A system for ultra filtration of blood including a device according to claim 1.

8. The system according to claim 7 further including an implanted bloodstream access device.