Method and apparatus for controlling pressurized infusion and temperature of infused liquids

• US 20020147426A1
• Filed: 03/12/2002
• Published: 10/10/2002
• Est. Priority Date: 03/12/2001
• Status: Active Grant

• Current Assignee: Medical Solutions Incorporated
• Original Assignee: Medical Solutions Incorporated
• Inventors: Faries, Durward I. Jr., Blankenship, Calvin, Heymann, Bruce R., Hendrix, David
• Granted Patent: US 7,238,171 B2
• Time in Patent Office: Days
• US Class Current: 604/140
• CPC Class Codes: A61M 5/1483 using flexible bags externally pressurised by fluid pressure
• CPC Class Codes: A61M 5/445 the media being heated in the reservoir, e.g. warming bloodbags

Abstract

A system for controlling pressurized infusion and temperature of intravenous fluids according to the present invention includes a housing, a heating assembly and a flexible cover. The heating assembly is recessed within the housing and includes a generally U-shaped configuration to surround and uniformly heat fluid within a fluid container placed thereon. The cover wraps around a portion of the fluid container to secure the fluid container against the heating assembly. The cover includes a pressurization member to apply a desired pressure to the fluid container to achieve a desired flow rate of intravenous fluid from the fluid container to an infusion site on a patient. The system further includes a controller to control the heating assembly and pressure within the pressurization member in accordance with desired temperature and pressure information entered into the controller for system operation.

Claims

1. A system for controlling pressurized infusion and temperature of intravenous fluids comprising:

a housing;

a heating assembly recessed within a housing exterior surface to heat an intravenous fluid container to a desired temperature;

a flexible cover to wrap around a portion of said fluid container to secure said fluid container against said recessed heating assembly;

a pressurization member to apply a desired pressure to said fluid container and control a flow rate of intravenous fluid from said fluid container to a patient; and

a controller to control at least one of said heating assembly and said pressurization member.

2. The system of claim 1, wherein said controller controls said heating assembly to heat said fluid container to the desired temperature.

3. The system of claim 1, wherein said controller controls said pressurization member to apply the desired pressure to said fluid container.

4. The system of claim 3, wherein said pressurization member includes an inflatable bellows, and said controller controls inflation and deflation of said bellows to achieve application of the desired pressure to said fluid container.

5. The system of claim 1, wherein said pressurization member is disposed on said cover.

6. The system of claim 3, further including:

a pressure sensor to measure pressure within said pressurization member, wherein said pressure sensor is coupled to said controller to facilitate control of said pressurization member in accordance with said measured pressure.

7. The system of claim 6, further including:

a pump to inflate said pressurization member with a fluid; and

a release valve to facilitate deflation of said pressurization member by releasing fluid therefrom;

wherein said pump and release valve are coupled to said controller to facilitate control of said pressurization member to apply the desired pressure to said fluid container.

8. The system of claim 2, further including:

a temperature sensor to measure a temperature of said heating assembly, wherein said temperature sensor is coupled to said controller to facilitate control of said heating assembly to heat said fluid container to the desired temperature in accordance with said measured temperature.

9. The system of claim 8, wherein said heating assembly includes:

a heating plate to receive said fluid container;

a heater disposed proximate at least a portion of said heating plate to apply heat to said heating plate and said fluid container; and

a heater controller coupled to said heater to control said heater to heat said heating plate to a predetermined temperature;

wherein said heater controller is controlled by said controller to facilitate heating of said fluid container to the desired temperature.

10. The system of claim 1, wherein said heating assembly includes a heating plate with a generally U-shaped configuration to receive said fluid container and substantially uniformly distribute heat thereto.

11. The system of claim 1, further comprising an input device coupled to said controller to facilitate entry of control information to said controller, wherein said control information includes at least one of the desired temperature and the desired pressure.

13. The method of claim 12, wherein step (d) further includes:

(d.1) controlling said heating assembly to heat said fluid container to the desired temperature.

14. The method of claim 12, wherein step (d) further includes:

(d.1) controlling said pressurization member to apply the desired pressure to said fluid container.

15. The method of claim 14, wherein said pressurization member includes an inflatable bellows, and step (d.1) further includes:

(d.1.1) controlling inflation and deflation of said bellows to achieve application of the desired pressure to said fluid container.

16. The method of claim 12, wherein said pressurization member is disposed on said cover, and step (d) further includes:

(d.1) controlling said pressurization member on said cover to apply the desired pressure to said fluid container.

17. The method of claim 14, wherein step (d.1) further includes:

(d.1.1) measuring pressure within said pressurization member and controlling said pressurization member to apply the desired pressure to said fluid container in accordance with said measured pressure.

18. The method of claim 17, wherein step (d.1.1) further includes:

(d.1.1.1) selectively inflating and deflating said pressurization member to control said pressurization member to apply the desired pressure to said fluid container.

19. The method of claim 13, wherein step (d.1) further includes:

(d.1.1) measuring a temperature of said heating assembly and controlling said heating assembly to heat said fluid container to the desired temperature in accordance with said measured temperature.

20. The method of claim 19, wherein said heating assembly includes a heating plate, a heater disposed proximate at least a portion of said heating plate and a heater controller, and step (a) further includes:

(a.1) receiving said fluid container on said heating plate;

step (b) further includes;

(b.1) applying heat from said heater to said heating plate and said fluid container; and

step (d.1.1) further includes;

(d.1.1.1) controlling said heater, via said heater controller, to heat said heating plate to a predetermined temperature; and

(d.1.1.2) controlling said heater controller to heat said fluid container to the desired temperature.

21. The method of claim 12, wherein said heating assembly includes a heating plate with a generally U-shaped configuration, and step (a) further includes:

(a.1) receiving said fluid container on said heating plate; and

step (b) further includes;

(b.1) substantially uniformly distributing heat from said heating plate to said fluid container.

22. The method of claim 12, wherein step (a) further includes:

(a.1) facilitating entry of control information, wherein said control information includes at least one of the desired temperature and the desired pressure.

24. The system of claim 23, wherein said pressurization means includes an inflatable bellows, and said control means controls inflation and deflation of said bellows to achieve application of the desired pressure to said fluid container.

25. The system of claim 23, wherein said pressurization means is disposed on said wrap means.

26. The system of claim 23, further including:

pressure sensing means for measuring pressure within said pressurization means, wherein said pressure sensing means is coupled to said control means to facilitate control of said pressurization means in accordance with said measured pressure.

27. The system of claim 26, further including:

pumping means for inflating said pressurization means with a fluid; and

deflating means for deflating said pressurization means by releasing fluid therefrom;

wherein said pump means and said deflating means are coupled to said control means to facilitate control of said pressurization means to apply the desired pressure to said fluid container.

28. The system of claim 23, further including:

temperature sensing means for measuring a temperature of said heating means, wherein said temperature sensing means is coupled to said control means to facilitate control of said heating means to heat said fluid container to the desired temperature in accordance with said measured temperature.

29. The system of claim 28, wherein said heating means includes:

a heating plate to receive said fluid container;

a heater disposed proximate at least a portion of said heating plate to apply heat to said heating plate and said fluid container; and

heater control means coupled to said heater to control said heater to heat said heating plate to a predetermined temperature;

wherein said heater control means is controlled by said control means to facilitate heating of said fluid container to the desired temperature.

30. The system of claim 23, wherein said heating means includes a heating plate with a generally U-shaped configuration to receive said fluid container and substantially uniformly distribute heat thereto.

31. The system of claim 23, further comprising entry means coupled to said controller for facilitating entry of control information to said control means, wherein said control information includes at least one of the desired temperature and the desired pressure.

12. In a system including a housing, a heating assembly recessed within a housing exterior surface, a flexible cover, a pressurization member and a controller, a method of controlling pressurized infusion and temperature of intravenous fluids comprising the steps of:

(a) receiving an intravenous fluid container within said recessed heating assembly, wherein said flexible cover is wrapped around a portion of said fluid container to secure said fluid container against said heating assembly;

(b) heating said fluid container to a desired temperature via said heating assembly;

(c) applying a desired pressure to said fluid container, via said pressurization member, to control a flow rate of fluid flowing from said fluid container to a patient; and

(d) controlling at least one of said heating assembly and said pressurization member.

23. A system for controlling pressurized infusion and temperature of intravenous fluids comprising:

a housing;

heating means recessed within a housing exterior surface for heating an intravenous fluid container to a desired temperature;

wrap means for wrapping around a portion of said fluid container to secure said fluid container against said recessed heating means;

pressurization means for applying a desired pressure to said fluid container and controlling a flow rate of intravenous fluid from said fluid container to a patient; and

control means for controlling at least one of said heating means and said pressurization means.

32. A system for controlling pressurized infusion of intravenous fluids comprising:

a housing;

a receptacle recessed within a housing exterior surface to receive an intravenous fluid container;

a flexible cover to wrap around a portion of said fluid container to secure said fluid container within said receptacle;

a pressurization member to apply a desired pressure to said fluid container and control a flow rate of intravenous fluid from said fluid container to a patient; and

a controller to control pressure applied by said pressurization member.

33. The system of claim 32, wherein said pressurization member is disposed on said cover.

34. The system of claim 32, further including:

a pressure sensor to measure pressure within said pressurization member, wherein said pressure sensor is coupled to said controller to facilitate control of said pressurization member in accordance with said measured pressure.

36. The system of claim 35, further including:

a temperature sensor to measure a temperature of said heating assembly, wherein said temperature sensor is coupled to said controller to facilitate control of said heating assembly to heat said fluid container to the desired temperature in accordance with said measured temperature.

37. The system of claim 36, wherein said heating assembly includes:

a heating plate to receive said fluid container;

a heater disposed proximate at least a portion of said heating plate to apply heat to said heating plate and said fluid container; and

a heater controller coupled to said heater to control said heater to heat said heating plate to a predetermined temperature;

wherein said heater controller is controlled by said controller to facilitate heating of said fluid container to the desired temperature.

38. The system of claim 35, wherein said heating assembly includes a heating plate with a generally U-shaped configuration to receive said fluid container and substantially uniformly distribute heat thereto.

35. A system for controlling temperature of intravenous fluids comprising:

a housing;

a heating assembly recessed within a housing exterior surface to heat an intravenous fluid container to a desired temperature;

a flexible cover to wrap around a portion of said fluid container to secure said fluid container against said recessed heating assembly; and

a controller to control said heating assembly.