Fluid processing apparatus

• US 7,226,538 B2
• Filed: 02/04/2004
• Issued: 06/05/2007
• Est. Priority Date: 07/13/2001
• Status: Expired due to Term

• Current Assignee: Nxstage Medical Incorporated (Fresenius Medical Care AG)
• Original Assignee: Nxstage Medical Incorporated (Fresenius Medical Care AG)
• Inventors: Brugger, James M., Treu, Dennis M.
• Primary Examiner(s): KIM, SUN U
• Application Number:
  US10/772,888
• Publication Number:
  US 20040222139A1
• Time in Patent Office: 1,217 Days
• Field of Search: 210/194, 210/195.1, 210/232, 210/252, 210/257.1, 210/258, 210/435, 210/436, 210/472, 210/254, 604/4.01, 604/5.01, 604/6.01, 604/6.09, 604/7, 604/9, 604/403, 604/408, 604/411, 604/412
• US Class Current: 210/252
• CPC Class Codes: A61M 1/288 Priming priming in extracorporeal blood circuits A61M1/3643
• CPC Class Codes: A61M 1/3462 Circuits for the preparation thereof
• CPC Class Codes: A61M 1/3468 using treated filtrate as substitution fluid
• CPC Class Codes: A61M 1/3643 Priming, rinsing before or after use
• CPC Class Codes: A61M 1/3644 Mode of operation
• CPC Class Codes: A61M 1/3646 Expelling the residual body fluid after use, e.g. back to the body

Abstract

Systems and methods handle air and rinsing fluid during fluid processing. The systems and methods eliminate air from a fluid processing system prior to, during, and after use. The systems and methods provide a connector assembly for establishing fluid flow from a fluid source. The connector assembly has discrete first and second passages that prevent communication between the fluid in first passage and the fluid in the second passage. Prior to system use, the connector assembly may be utilized in a priming function to remove residual air from a fluid circuit prior to use. The connector assembly may also be utilized after use to perform a rinse-back function.

Claims

1. A fluid processing apparatus comprising:

an extracorporeal blood treatment fluid circuit including a blood filter, the fluid circuit having a blood circuit portion and a non-blood circuit portion separated by a membrane of the blood filter;

a connector having a distal end and a base opposite the distal end, the connector including a medical fluid bag spike having two lumens that open proximate the distal end;

each of the two lumens being connected, at the base, to the blood circuit portion, such that there is flow communication between the lumens and the blood circuit portion;

at least one of the two lumens being releasably connected to the blood circuit portion;

a sterile empty medical fluid bag, the medical fluid bag spike being inserted in the sterile empty medical fluid bag.

2. The apparatus of claim 1, wherein one of the two lumens opens at the distal end further from the base than the other lumen opens at the distal end.

3. The apparatus of claim 1, wherein the blood filter has two openings, one for blood inlet and one for blood outlet, one of the lumens being connected to the opening for blood inlet and the other to the opening for blood outlet.

4. A fluid processing apparatus comprising:

a fluid circuit for blood treatment including a blood filter, the fluid circuit having a blood circuit portion and a non-blood circuit portion separated by a membrane of the blood filter;

a connector having a distal end and a base opposite the distal end, the connector including a medical fluid bag spike having two lumens that open proximate the distal end;

a first of the two lumens being connected, at the base, to the blood circuit portion, such that there is flow communication between the first lumen and the blood circuit portion;

a second of the two lumens having a lumen connector, the blood circuit portion having a circuit connector that mates with lumen connector such that, when mated, the second lumen is in fluid communication with the blood circuit portion;

a sterile empty medical fluid bag, the medical fluid bag spike being inserted in the sterile empty medical fluid bag.

5. The apparatus of claim 4, wherein one of the two lumens opens at the distal end further from the base than the other lumen opens at the distal end.

6. The apparatus of claim 4, wherein the blood filter has two openings, one for blood inlet and one for blood outlet, the first lumen being connected to the opening for blood inlet and the second lumen being connectable to the opening for blood outlet.