Renal therapy machine and system including a priming sequence

Patent metadata

Field	Value
Publication number	US-9925320-B2
Application number	US-201715668850-A
Country	US
Kind code	B2
Filing date	Aug 4, 2017
Priority date	Oct 24, 2007
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A renal therapy machine includes a blood filter including a plurality of porous fibers; a blood circuit in communication with the blood filter; and a dialysate circuit in communication with the blood filter and operable with at least one pump, wherein the renal therapy machine is configured to perform a priming sequence in which a physiologically compatible solution, other than dialysate, primes the blood circuit and is flowed within the fibers and through pores in the fibers of the blood filter, and the pump of the dialysate circuit vents air from the blood filter into the dialysate circuit.

First claim

The invention is claimed as follows:

1. A renal therapy machine comprising:
a blood filter including a plurality of porous fibers;
a blood circuit in communication with the blood filter;
a dialysate circuit in communication with the blood, filter; and
at least one pump or valve positioned and arranged to purge air from the blood filter into the dialysate circuit, as a physiologically compatible solution, other than dialysate, is moved across the porous fibers of the blood filter,
wherein the renal therapy machine is configured to perform a priming sequence in which (i) the physiologically compatible solution, other than dialysate, primes the blood circuit and is flowed within the fibers and through pores in the fibers of the blood filter, and (ii) the at least one pump or valve purges air, via the dialysate circuit, from the blood filter into the dialysate circuit.

2. The renal therapy machine of claim 1 , wherein the at least one pump or valve is a spent dialysate pump or valve.

3. The renal therapy machine of claim 1 , which includes a blood pump operable with the blood circuit, wherein the blood filter includes a housing holding the porous fibers, and wherein the physiologically compatible solution, other than dialysate, is pumped by the blood pump through pores in the fibers of the blood filter and fills the housing of the blood filter.

4. The renal therapy machine of claim 1 , which includes a blood pump operable with the blood circuit, and wherein the physiologically compatible solution, other than dialysate, is pumped by the blood pump through the pores in the fibers of the blood filter and into the dialysate circuit.

5. The renal therapy machine of claim 4 , wherein the physiologically compatible solution, other than dialysate, flowed into the dialysate circuit purges air from the dialysate circuit.

6. The renal therapy machine of claim 5 , which includes a fresh dialysate pump operable with the dialysate circuit, and wherein the dialysate circuit is additionally primed using dialysate pumped by the fresh dialysate pump.

7. The renal therapy machine of claim 1 , which includes a fresh dialysate pump operable with the dialysate circuit, and wherein the dialysate circuit is primed using dialysate pumped by the fresh dialysate pump.

8. The renal therapy machine of claim 1 , which includes a blood pump and at least one blood circuit valve operable with the blood circuit, and wherein the blood circuit is primed using the blood pump and the at least one blood circuit valve.

9. The renal therapy machine of claim 1 , wherein the physiologically compatible solution, other than dialysate, includes saline.

10. A renal therapy machine comprising:
a blood filter including a housing holding a plurality of porous fibers;
a blood circuit in communication with the blood filter and operable with a blood pump;
a dialysate circuit in communication with the blood filter; and
at least one pump or valve positioned and arranged to purge air from the blood filter into the dialysate circuit, as a physiologically compatible solution, other than dialysate, is moved across the porous fibers of the blood filter,
wherein the renal therapy machine is configured to perform a priming sequence in which (i) the physiologically compatible solution, other than dialysate, is pumped by the blood pump to prime the blood circuit and to flow within the fibers and through pores in the fibers of the blood filter, (ii) wherein the at least one pump or valve vents air, via the dialysate circuit, from the blood filter into the dialysate circuit, and (iii) wherein the physiologically compatible solution, other than dialysate, enters a portion of the housing of the blood filter outside of the fibers.

11. The renal therapy machine of claim 10 , wherein the physiologically compatible solution, other than dialysate, is pumped by the blood pump through the pores in the fibers of the blood filter and into the dialysate circuit.

12. The renal therapy machine of claim 10 , wherein the at least one pump or valve enables the physiologically compatible solution, other than dialysate, to flow through the pores in the fibers of the blood filter and into the dialysate circuit.

13. The renal therapy machine of claim 10 , wherein the at least one pump or valve is a spent dialysate pump or valve.

14. The renal therapy machine of claim 10 , wherein the blood pump pumps in multiple directions to prime the blood circuit.

15. A renal therapy machine comprising:
a blood filter;
a blood circuit in communication with the blood filter;
a blood pump operable with the blood circuit;
a dialysate circuit in communication with the blood filter and including a balancing structure forming a fresh dialysate circuit side between a fresh dialysate source and a fresh fluid inlet to the blood filter and a spent dialysate circuit side between a dialysate outlet of the blood filter and a drain; and
at least one pump or valve positioned and arranged to vent air from the blood filter into the dialysate circuit, as a physiologically compatible solution, other than dialysate, is moved across porous fibers of the blood filter,
wherein the renal therapy machine is configured to perform a priming sequence in which (i) the physiologically compatible solution, other than dialysate, is pumped by the blood pump to prime the blood circuit and at least a portion of the spent dialysate circuit side of the dialysate circuit formed by the balancing structure, (ii) dialysate is pumped by a fresh dialysate pump to prime the fresh dialysate circuit side of the dialysate circuit formed by the balancing structure, and (iii) the at least one pump or valve vents air, via the dialysate circuit, from the blood filter into the dialysate circuit.

16. The renal therapy machine of claim 15 , wherein the dialysate used to prime the fresh dialysate circuit side of the dialysate circuit formed by the balancing structure is fresh dialysate from the fresh dialysate source.

17. The renal therapy machine of claim 15 , wherein the at least one pump or valve is a spent dialysate pump operable with the spent dialysate circuit side to pull the physiologically compatible solution, other than dialysate, from the blood filter and into the spent dialysate circuit side.

18. The renal therapy machine of claim 17 , wherein the spent dialysate pump operable with the spent dialysate circuit side also pushes the physiologically compatible solution, other than dialysate, to the balancing structure, causing fresh dialysate to flow along the fresh dialysate circuit side from the balancing structure to the blood filter.

19. The renal therapy machine of claim 15 , wherein the fresh dialysate pump operable with the fresh dialysate circuit side pulls fresh dialysate from the fresh dialysate source into the fresh dialysate circuit side formed by the balancing structure.

20. The renal therapy machine of claim 19 , wherein the fresh dialysate pump also pushes the fresh dialysate to the balancing structure, causing the physiologically compatible solution, other than dialysate, to flow along the spent dialysate circuit side, from the balancing structure to the drain.

Assignees

• Baxter Int
• Baxter Healthcare Sa

Inventors

• Childers Robert W
• Kelly Thomas D
• Roger Rodolfo

Classifications

• A61M1/16 Primary

  with membranes · CPC title

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title

• A61M1/1605

  Physical characteristics of the dialysate fluid · CPC title

• A61M1/14

  Dialysis systems; Artificial kidneys; Blood oxygenators (semi-permeable membranes characterised by the material, manufacturing processes therefor B01D71/00){; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis} · CPC title

• A61M1/3649

  using dialysate as priming or rinsing liquid · CPC title