BLOOD CIRCUIT ASSEMBLY FOR A HEMODIALYSIS SYSTEM

• US 20090105629A1
• Filed: 08/27/2008
• Published: 04/23/2009
• Est. Priority Date: 02/27/2007
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Grant, Kevin L., Demers, Jason A., Collins, David E., Dale, James D., Wilt, Michael J.
• Granted Patent: US 9,028,691 B2
• Time in Patent Office: Days
• US Class Current: 604/5.40
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1601 Control or regulation
• CPC Class Codes: A61M 1/1633 with more than one dialyser unit
• CPC Class Codes: A61M 1/1639 linked by membranes
• CPC Class Codes: A61M 1/1652 Holding or locking systems for the membrane unit
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/166 Heating for sterilisation A61M1/1686
• CPC Class Codes: A61M 1/1668 Details of containers
• CPC Class Codes: A61M 1/1682 both machine and membrane module, i.e. also the module blood side
• CPC Class Codes: A61M 1/1686 by heat
• CPC Class Codes: A61M 1/1696 with dialysate regeneration
• CPC Class Codes: A61M 1/3607 Regulation parameters
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/362266 Means for adding solutions or substances to the blood
• CPC Class Codes: A61M 1/3623 Means for actively controlling temperature of blood
• CPC Class Codes: A61M 1/3627 Degassing devices; Buffer reservoirs; Drip chambers; Blood filters
• CPC Class Codes: A61M 1/842 rotating continuously rotating surgical cutting instruments A61B17/32002
• CPC Class Codes: A61M 1/85 with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/3331 : Pressure; Flow
• CPC Class Codes: A61M 2205/3368 : Temperature
• CPC Class Codes: A61M 2205/58 : Means for facilitating use, e.g. by people with impaired vision
• CPC Class Codes: A61M 2209/08 : Supports for equipment
• CPC Class Codes: A61M 39/1011 : Locking means for securing connection; Additional tamper safeties A61M39/16 takes precedence
• CPC Class Codes: A61M 39/105 : Multi-channel connectors or couplings, e.g. for connecting multi-lumen tubes multi-channel connectors in general F16L37/56
• CPC Class Codes: A61M 60/113 : in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/268 : the displacement member being flexible, e.g. membranes, diaphragms or bladders
• CPC Class Codes: A61M 60/37 : Haemodialysis, haemofiltration or diafiltration
• CPC Class Codes: A61M 60/427 : the force acting on the blood contacting member being hydraulic or pneumatic
• CPC Class Codes: A61M 60/523 : using blood flow data, e.g. from blood flow transducers
• CPC Class Codes: A61M 60/546 : of blood flow, e.g. by adapting rotor speed
• CPC Class Codes: B01D 61/30 : Accessories; Auxiliary operation
• CPC Class Codes: B01D 61/32 : Controlling or regulating

Abstract

A blood circuit assembly for a dialysis unit may include an organizing tray, a pair of pneumatic pumps mounted to the organizing tray for circulating blood received from a patient through a circuit including a dialyzer unit and returned to the patient, an air trap mounted to the organizing tray arranged to remove air from blood circulating in the circuit, a pair of dialyzer connections arranged to connect to the inlet and outlet of a dialyzer unit, and a pair of blood line connectors, one inlet blood line connector for receiving blood from the patient and providing blood to the pneumatic pumps and the other outlet blood line connector for returning blood to the patient.

Claims

1. A blood circuit assembly for a dialysis unit, comprising:

an organizing tray;

a pair of pneumatic pumps mounted to the organizing tray for circulating blood received from a patient through a circuit including a dialyzer unit and returned to the patient;

an air trap mounted to the organizing tray arranged to remove air from blood circulating in the circuit;

a pair of dialyzer connections arranged to connect to the inlet and outlet of a dialyzer unit; and

a pair of blood line connectors, one inlet blood line connector for receiving blood from the patient and providing blood to the pneumatic pumps and the other outlet blood line connector for returning blood to the patient.

2. The blood circuit assembly of claim 1, further comprising an anticoagulant connection for engaging with an anticoagulant source and providing anticoagulant into the circuit.

3. The blood circuit assembly of claim 2, further comprising a pump for pumping anticoagulant from the anticoagulant source to the circuit.

4. The blood circuit assembly of claim 3, wherein the pair of pneumatic pumps, the anticoagulant connection, and the anticoagulant pump are part of a pump cassette.

5. The blood circuit assembly of claim 4, wherein the inlet blood line connector is connected to an inlet for the pump cassette, an outlet for the pump cassette is connected to a dialyzer inlet connector, a dialyzer outlet connector is connected to an inlet of the air trap, and an outlet of the air trap is connected to the outlet blood line connector.

6. The blood circuit assembly of claim 2, wherein the anticoagulant connection includes a vial holder and a spike, and the anticoagulant source is a vial of heparin.

7. The blood circuit assembly of claim 1, wherein the organizing tray includes a pair of handles arranged for gripping by a user for installing the blood circuit assembly on a dialysis unit.

8. The blood circuit assembly of claim 7, wherein the organizing tray includes openings adjacent each of the handles for receiving retaining tabs on a dialysis unit that engage with the blood circuit assembly and retain the blood circuit assembly on the dialysis unit.

9. The blood circuit assembly of claim 8, wherein the inlet of the air trap is located above the outlet of the air trap when the blood circuit assembly is mounted to a dialysis unit.

10. The blood circuit assembly of claim 1, wherein the pneumatic pumps are diaphragm pumps.

11. The blood circuit assembly of claim 1, wherein the blood line connectors are arranged for a threaded luer-type connection to a patient access, and are arranged for a press-in type connection to the dialysis unit.

12. The blood circuit assembly of claim 11, wherein the blood line connectors include a frustoconical member with an internal thread for the luer-type connection, and a central tube extending from a center of the frustoconical member.

13. The blood circuit assembly of claim 12, wherein the blood line connectors include locking arms with at least one barb to engage with a complementary connector for the press-in type connection to the dialysis unit.

14. The blood circuit assembly of claim 1, wherein the organizing tray includes circuit tube engagement members having a hole through which a respective circuit tube passes, the engagement members engaging with the respective circuit tube to allow the circuit tube to be pulled and stretched for engagement with an occluder of the dialysis unit.

15. A method for replacing a blood circuit assembly of a dialysis unit, comprising:

grasping a pair of handles on an organizing tray of a blood circuit assembly that is mounted to a dialysis unit, the blood circuit assembly including a pair of pneumatic pumps mounted to the organizing tray for circulating blood received from a patient through a circuit including a dialyzer unit and returned to the patient, an air trap mounted to the organizing tray arranged to remove air from blood circulating in the circuit, a pair of dialyzer connections arranged to connect to the inlet and outlet of a dialyzer unit, and a pair of blood line connectors;

disengaging locking tabs of the dialysis unit from the blood circuit assembly to free the blood circuit assembly from the dialysis unit; and

pulling on the handles on the organizing tray of the blood circuit assembly to remove the blood circuit assembly from the dialysis unit.

16. The method of claim 15, wherein the step of disengaging locking tabs comprises:

flexing the locking tabs away from each other such that each locking tab is moved toward a nearest one of the handles.

17. The method of claim 15, further comprising:

providing a replacement blood circuit assembly for installation on the dialysis unit;

aligning openings in the organizing tray of the replacement blood circuit assembly with the locking tabs so that each locking tab is received into a respective opening; and

pushing the organizing tray relative to the dialysis unit such that the locking tabs engage with the replacement blood circuit assembly to mount the replacement blood circuit assembly to the dialysis unit.

18. The method of claim 17, further comprising:

connecting the dialyzer connections to the inlet and outlet of the dialyzer unit.

19. The method of claim 17, further comprising:

connecting blood line connectors to the dialysis unit to receive dialysate into the circuit.

20. The method of claim 17, wherein the step of pushing the organizing tray comprises:

engaging control ports on a blood pump cassette with corresponding ports on the dialysis unit such that the control ports receive control fluid to control operation of the pneumatic pumps.

21. A tube securing arrangement of a blood circuit assembly for a medical infusion device for delivering a liquid to a patient, comprising:

an organizing tray that supports components of a blood circuit assembly, the organizing tray having a pair of tube engagement members each having a hole;

a pair of patient inlet and outlet lines arranged to connect with patient access points for receiving liquid from and/or providing liquid to the patient; and

a pair of stops on the patient inlet and outlet lines, respectively;

wherein the patient inlet and outlet lines each pass through a hole of a respective tube engagement member so that the stop engages with the tube engagement member, and wherein the tube engagement members are arranged to resist pulling and stretching of the inlet and outlet lines when engaging the lines with an occluder.

22. The arrangement of claim 21, wherein the tube engagement members are flexible to allow a user to press inwardly on the engagement member and seat the respective inlet or outlet line in the occluder, yet resist downward pulling of the line.

23. The arrangement of claim 22, wherein the tube engagement members are arranged to resist downward pulling of the line to allow the line to stretch and reduce diameter when pulled.