Devices and systems for medical fluid treatment

• US 8,821,135 B2
• Filed: 08/25/2011
• Issued: 09/02/2014
• Est. Priority Date: 08/25/2010
• Status: Active Grant

• Current Assignee: Children's Healthcare of Atlanta Foundation Incorporated, Emory University, Georgia Tech Research Corporation (University System of Georgia)
• Original Assignee: Emory University, Georgia Tech Research Corporation (University System of Georgia)
• Inventors: Paden, Matthew L., Yoganathan, Ajit, Dasi, Lakshmi Prasad
• Primary Examiner(s): LETTMAN, BRYAN MATTHEW
• Application Number:
  US13/218,328
• Publication Number:
  US 20120048407A1
• Time in Patent Office: 1,104 Days
• Field of Search: 417/395, 417/413.1, 417/571
• US Class Current: 417/413.1
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1601 Control or regulation
• 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 1/3623 Means for actively controlling temperature of blood
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/117 for assisting the heart, e.g. transcutaneous or external ventricular assist devices
• 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 60/38 Blood oxygenation
• CPC Class Codes: A61M 60/441 generated by an electromotor
• CPC Class Codes: A61M 60/546 of blood flow, e.g. by adapting rotor speed
• CPC Class Codes: A61M 60/554 of blood pressure
• CPC Class Codes: A61M 60/585 User interfaces
• CPC Class Codes: A61M 60/825 Contact bearings, e.g. ball-and-cup or pivot bearings
• CPC Class Codes: A61M 60/853 the valve being formed by a flexible tube element which is clamped for restricting the flow
• CPC Class Codes: A61M 60/892 : Active valves, i.e. actuated by an external force
• CPC Class Codes: A61M 60/894 : Passive valves, i.e. valves actuated by the blood
• CPC Class Codes: F04B 43/02 : having plate-like flexible members, e.g. diaphragms F04B43/14 takes precedence
• CPC Class Codes: Y10T 137/85978 : With pump

Abstract

The devices and systems are medical fluid treatment therapies. The device and systems are configured and capable of operating based on small volumes of fluids. The devices and systems include a pump configured for small volume of a fluid. The pump may include a first conduit configured for inflow of the fluid; a second conduit configured for outflow of the fluid; a fluid chamber configured to move the fluid through the pump; a diaphragm configured to force the fluid through the fluid chamber by indirectly exerting force on the fluid chamber; and a connector configured to removably attach the pump to a motor.

Claims

1. A fluid pump for medical fluid treatment therapies configured for small volumes of a fluid, comprising:

a first conduit configured for inflow of the fluid;

a second conduit configured for outflow of the fluid;

a fluid chamber configured to move the fluid through the pump;

a diaphragm configured to force the fluid through the fluid chamber by indirectly exerting force on the fluid chamber;

a connector configured to removably attach the pump to a motor; and

an actuator directly connected to the diaphragm, the actuator being configured to move a surface of the diaphragm,

wherein the fluid chamber includes a first surface and an opposing second surface, the first surface and the second surface defining a membrane configured to hold the fluid therebetween, at least one of the first and second surfaces includes a flexible material.

2. The fluid pump according to claim 1, wherein:

the actuator is configured to linearly move the surface of the diaphragm; and

each of the first and second surfaces includes the flexible material.

3. The fluid pump according to claim 1, further comprising:

a housing, the housing including at least a first section and a second section; and

wherein the first section includes a cavity filled with an incompressible fluid, the first conduit, the second conduit and the fluid chamber, and the cavity is disposed between the fluid chamber and the diaphragm.

4. The fluid pump according to claim 3, wherein:

the diaphragm is fixedly attached to the housing between the first section and the second section; and

the actuator is configured to move the diaphragm between a first position and a second position;

the first position corresponding to when a surface of the diaphragm protrudes into the first section and the second position corresponding to when the surface of the diaphragm protrudes into the second section.

5. The fluid pump according to claim 4, wherein:

the diaphragm is configured to transfer force to the incompressible fluid when the diaphragm is in the second position, and the incompressible fluid is configured to move the fluid through the fluid chamber.

6. The fluid pump according to claim 4, wherein the second section includes a piston.

7. The fluid pump according to claim 6, wherein the first section has an extending surface and the second section has an extending surface, the extending surface of the first section facing the extending surface of the second section.

8. The fluid pump according to claim 1, further comprising:

a cap, the cap including ports configured to connect tubing to the first and second conduits.

9. A medical fluid therapy system, comprising:

at least one medical fluid pump, the pump including;

a fluid chamber configured to move a fluid through the pump;

a diaphragm configured to force the fluid through the fluid chamber by indirectly exerting force on the fluid chamber;

a plurality of valves, the valves including at least a first valve and a second valve configured to control the flow of fluid through the fluid pump;

a motor;

a controller configured to collectively control the movement of the motor and valves with respect to each other; and

an actuator directly connected to the diaphragm, the actuator being configured to move a surface of the diaphragm,

wherein the fluid chamber includes a first surface and an opposing second surface, the first surface and the second surface defining a membrane configured to hold the fluid therebetween, at least one of the first and second surfaces includes a flexible material.

10. The system according to claim 9, further comprising:

a fluid balance system,

the fluid balance system including a first pump and a second pump, each pump including the fluid chamber, the diaphragm and the first valve and the second valve,

wherein the first pump and second pump are offset of each other.

11. The system according to claim 9, further comprising:

a display, the display includes a user interface configured to enter operating parameters to control the system.

12. The system according to claim 11, wherein the user interface displays the operating status of the system.

13. The system according to claim 12, wherein the operating status includes flow rates of the fluid flowing through the pump and an angle of the valve.

14. The system according to claim 9, further comprising:

at least one pump receiving member, the at least one pump receiving member having a depression configured to receive a portion of the pump,

wherein the pump includes a housing, the housing including at least a first section and a second section,

wherein the first section has an extending surface and the second section has an extending surface, the extending surface of the first section facing the extending surface of the second section, and

wherein the depression is configured to receive the extending surface of at least the second section.

15. The system according to claim 14, further comprising:

at least first and second self-contained sections, wherein the first self-contained section includes the controller; and

the second self-contained section includes the pump receiving member.

16. The system according to claim 9, wherein the system is configured for a plurality of fluid treatment modes.

17. The system according to claim 9, wherein the controller is configured to control the motor and valves based on entered volume parameters.

18. The system according to claim 17, wherein an operating status of the system is stored at predetermined intervals.

19. A disposable kit for a medical therapy system, comprising:

a first conduit configured for inflow of a fluid;

a second conduit configured for outflow of the fluid;

a fluid chamber configured to move the fluid through a pump;

a diaphragm configured to force the fluid through the fluid chamber by indirectly exerting force on the fluid chamber;

a connector configured to removably attach the pump to a motor; and

an actuator directly connected to the diaphragm, the actuator being configured to move a surface of the diaphragm,

wherein the fluid chamber includes a first surface and an opposing second surface, the first surface and the second surface defining a membrane configured to hold the fluid therebetween, at least one of the first and second surfaces includes a flexible material.

20. The kit according to claim 19, further comprising:

tubing configured for the medical therapy system.