Single step fluid circuit engagement device and method

• US 20040243047A1
• Filed: 03/08/2004
• Published: 12/02/2004
• Est. Priority Date: 02/14/1997
• Status: Abandoned Application

• Current Assignee: Nxstage Medical Incorporated (Fresenius SE & Co. KGaA)
• Original Assignee: Nxstage Medical Incorporated (Fresenius SE & Co. KGaA)
• Inventors: Brugger, James M., Treu, Dennis M., Burbank, Jeffrey H.
• Application Number:
  US10/796,912
• Publication Number:
  US 20040243047A1
• Time in Patent Office: Days
• US Class Current: 604/4.01
• CPC Class Codes: A61M 1/1639 linked by membranes
• 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 1/3401 Cassettes therefor
• CPC Class Codes: A61M 1/3403 Regulation parameters
• CPC Class Codes: A61M 1/341 by measuring the filtrate rate or volume
• CPC Class Codes: A61M 1/342 Adding solutions to the blood, e.g. substitution solutions for preventing coagulation A61M1/3672
• CPC Class Codes: A61M 1/3441 Substitution rate control as a function of the ultrafiltration rate
• CPC Class Codes: A61M 1/3444 in which the collected ultra-filtrate expels an equal volume of substitution fluid from a reservoir
• CPC Class Codes: A61M 1/3448 by mechanically linked pumps in both ultra-filtrate and substitution flow line
• CPC Class Codes: A61M 1/3458 having electrolytes not present in the dialysate
• CPC Class Codes: A61M 1/361 before treatment
• CPC Class Codes: A61M 1/3612 after treatment
• CPC Class Codes: A61M 1/362223 the interface being evacuated interfaces to enhance contact
• CPC Class Codes: A61M 1/36224 with sensing means or components thereof
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/36226 Constructional details of cassettes, e.g. specific details on material or shape
• CPC Class Codes: A61M 1/362262 Details of incorporated reservoirs
• CPC Class Codes: A61M 1/362265 Details of valves
• CPC Class Codes: A61M 1/3626 Gas bubble detectors
• CPC Class Codes: A61M 1/3639 Blood pressure control, pressure transducers specially adapted therefor
• CPC Class Codes: A61M 1/3646 : Expelling the residual body fluid after use, e.g. back to the body
• CPC Class Codes: A61M 1/367 : Circuit parts not covered by the preceding subgroups of group A61M1/3621
• CPC Class Codes: A61M 2205/126 : with incorporated membrane filters
• CPC Class Codes: A61M 2205/128 : with incorporated valves
• CPC Class Codes: A61M 2205/15 : Detection of leaks
• CPC Class Codes: A61M 2205/3331 : Pressure; Flow
• CPC Class Codes: A61M 2205/3334 : Measuring or controlling the flow rate
• CPC Class Codes: A61M 2205/35 : Communication
• CPC Class Codes: A61M 2205/3553 : remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3569 : sublocal, e.g. between console and disposable
• CPC Class Codes: A61M 2205/505 : Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/60 : with identification means
• CPC Class Codes: A61M 2205/6018 : providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2205/6072 : Bar codes
• CPC Class Codes: A61M 39/0208 : Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276

Abstract

A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.

Claims

1. A renal replacement therapy system, comprising:

a blood treatment device with at least one peristaltic pump mechanism;

a fluid circuit with respective portions to engage said at least one peristaltic pump mechanism;

said fluid circuit including separate engagement elements that may be brought together around said respective portions to engage said at least one peristaltic pump mechanism fluid circuit portions by a forcing a first of said engagement elements against a second of said engagement elements;

said fluid circuit and said blood treatment device being arranged such that multiple separate fluid flows may be maintained by an operation of said at least one peristaltic pump merely by means of said forcing, whereby an installation and set up of said fluid circuit is simplified.

2. A system according to claim 1, wherein said fluid circuit includes an extracorporeal blood circuit.

3. A system as in claim 1, wherein said fluid circuit is configured for circulating blood from an individual through the blood treatment device to remove waste and to return blood and replacement fluid to the individual after removal of waste and said respective portions include a first portion for conveying waste, a second portion for conveying blood, and a third portion for conveying replacement fluid.

4. A system as in claim 1, wherein said at least one actuator includes a peristaltic pump with a single rotating element that pumps blood through multiple ones of said respective portions, said respective portions carrying different fluids including at least blood and another fluid.

5. A system as in claim 4, wherein said at least another fluid includes replacement fluid.

6. A system as in claim 4, wherein said at least another fluid includes waste fluid.

7. A system as in claim 1, wherein said first of said engagement elements includes a filter.

8. A system as in claim 1, wherein said first of said engagement elements is permanently attached to said fluid circuit forming a sterile consumable component which is replaced after a fixed number of treatments.

9. A method of performing renal replacement therapy using a blood treatment device with at least one peristaltic pump mechanism having separate engagement elements, a fluid circuit with respective portions to engage said at least one peristaltic pump mechanism, comprising the steps of:

locating said fluid circuit respective portions between said separate engagement portions;

attaching said engagement portions together to squeeze said respective portions therebetween;

operating a pump in one of said engagement portions to convey at least blood and at least one other fluid in order to perform a therapeutic treatment.

10. A method as in claim 9, wherein said respective portions include fluid lines and said step of locating includes laying said fluid lines on a peristaltic pump.

11. A method as in claim 9, further comprising disposing of said first of said engagement elements and replacing it with another after a fixed number of treatments.

12. A method as in claim 11, wherein said fixed number is one.

13. A renal replacement therapy system, comprising:

a blood treatment machine having at least one pump and at least one pump race configured to engage tubes of a fluid circuit;

a replaceable tubing set with tubes configured to engage with said at least one pump;

said at least one pump defining a single synchronous mechanical device such that said at least one pump, upon engaging with multiple ones of said tubes, said fluids are synchronously pumped through said tubes by an action of said at least one pump;

said tubes being engageable in a single step operation by placing them between said at least one pump and moving said at least one pump race toward said at least one pump.

14. A system as in claim 13, wherein said at least one pump race is connected to a filter.

15. A system as in claim 13, wherein said at least one pump race is attached to said fluid circuit.