Devices, systems, and methods for warming fluids in multiple intravenous fluid containers

• US 8,313,460 B2
• Filed: 03/21/2006
• Issued: 11/20/2012
• Est. Priority Date: 03/21/2005
• Status: Active Grant

• Current Assignee: Vital Signs Incorporated (Becton, Dickinson & Co)
• Original Assignee: General Electric Company
• Inventors: Cassidy, David E.
• Primary Examiner(s): DeSanto, Matthew F
• Application Number:
  US11/385,174
• Publication Number:
  US 20060210255A1
• Time in Patent Office: 2,436 Days
• Field of Search: 604/113, 604/114, 604/93.01, 604/27, 604/28, 604/29, 604/6.13, 392/470, 607/96, 607/104
• US Class Current: 604/113
• CPC Class Codes: A61M 2205/3653 by Joule effect, i.e. electric resistance
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/8212 with means or measures taken for minimising energy consumption
• CPC Class Codes: A61M 5/1408 in parallel, e.g. manifolds, sequencing valves access sites A61M39/02; tube connectors A61M39/10
• CPC Class Codes: A61M 5/445 the media being heated in the reservoir, e.g. warming bloodbags

Abstract

Devices, systems and methods for controlling fluid temperatures from more than one fluid containers prior to their infusion into a human body are disclosed. The device includes a power supply source for providing power; an input/output interface for receiving fluid temperature data from thermal sensors and for transmitting duty-cycle signals to each of the fluid warming unit; a processing unit for comparing fluid temperature data with a permissible fluid temperature range, for calculating a fluid temperature differential, and for apportioning the available work cycle of the power supply source; and a controller for adjusting the duty-cycle of each fluid warming unit based on the fluid temperature differentials, so that during each work cycle all available power provided by the power supply source is delivered to only one of the fluid warming units at a time.

Claims

1. A device for controlling fluid temperatures from more than one fluid containers prior to their infusion into a human body, each of more than one fluids being heated by a fluid warming unit with a controllable duty-cycle, the device comprising:

a power supply source to provide power to a plurality of fluid warming units;

an input/output interface to receive fluid temperature data with respect to each fluid warming unit and to transmit duty-cycle signals to each fluid warming unit;

a processing unit to compare fluid temperature data with a permissible fluid temperature range and calculate a fluid temperature differential therefrom; and

a controller to adjust the duty-cycle of each fluid warming unit based on the fluid temperature differentials, so that during each work cycle all available power from the power supply source is delivered to only one of the fluid warming units, when both fluid warming units are on and being used at the same time.

2. The device as recited in claim 1, the device further comprising a display device for displaying fluid temperature data.

3. The device as recited in claim 2, the device further comprising a gravitational sensor that provides a gravitational orientation, which the processing unit uses to orient a display on the display device so that it is readable.

4. The device as recited in claim 1, the device further comprising

a first housing portion and a second housing portion for housing and protecting the power supply source, the input/output interface, the processing unit, and the controller;

and

a clamping device that is fixedly attached to one of the first housing portion and the second housing portion for releasably attaching the device to a support.

5. The device as recited in claim 4, wherein the support is an intravenous drip bag pole that is oriented horizontally or vertically.

6. The device as recited in claim 1, wherein the device includes a fluid warming unit identification device that comprises an activation device and a visual identification device having a matching color to a visual identification device disposed on the respective fluid warming unit.

7. The device as recited in claim 6, wherein the activation device on the fluid warming unit identification device is further structured and arranged to provide a signal to an audio identification device disposed on the respective fluid warming unit such that, when the activation device is activated, the audio identification device emits an audible signal.

8. The device as recited in claim 1, wherein each of the more than one fluid containers is an intravenous drip bag.

9. The device as recited in claim 1, wherein the input/output interface receives fluid temperature data from a thermal sensor in association with each of the more than one fluid containers or each of the fluid warming units.

10. The device as recited in claim 1, wherein the controller can access formulae or a look-up table that provides duty-cycle adjustments for a multiplicity of fluid temperature differentials.

11. The device as recited in claim 1, wherein the processing unit apportions the work cycle of the power supply source so that the duty-cycle of each fluid warming unit is accomplished during the work cycle.

12. A system for controlling fluid temperatures from more than one fluid containers prior to their infusion into a human body, the system comprising:

more than one fluid warming units, each having a controllable duty-cycle, each of which is associated with a respective one of the more than one fluid containers to heat fluid from the more than one fluid containers prior to infusion into the human body;

more than one thermal sensors, each of which is associated with a respective one of the more than one fluid warming units, to provide fluid temperature data; and

a device to adjust the duty-cycle of each fluid warming unit, the device including;

a power supply source to provide power to the more than one fluid warming units;

an input/output interface to receive fluid temperature data from each of the thermal sensors and to transmit duty-cycle signals to each of the more than one fluid warming units;

a processing unit to compare fluid temperature data with a permissible fluid temperature range and calculate a fluid temperature differential therefrom; and

a controller to adjust the duty-cycle of each fluid warming unit based on the fluid temperature differentials, so that during each work cycle all available power provided by the power supply source is delivered to only one of the fluid warming units, when both fluid warming units are on and being used at the same time.

13. The system as recited in claim 12, the device further comprising a display device for displaying fluid temperature data.

14. The system as recited in claim 13, the device further comprising a gravitational sensor that provides a gravitational orientation, which the processing unit uses to orient a display on the display device so that it is readable.

15. The system as recited in claim 12, the device further comprising:

a first housing portion and a second housing portion for housing and protecting the power supply source, the input/output interface, the processing unit, and the controller; and

a clamping device that is fixedly attached to one of the first housing portion and the second housing portion for releasably attaching the device to a support.

16. The system as recited in claim 15, wherein the support is an intravenous drip bag pole that is oriented horizontally or vertically.

17. The system as recited in claim 12, wherein the device for adjusting the duty-cycle of each fluid warming unit includes a fluid warming unit identification device that comprises an activation device and a visual identification device having a matching color to a visual identification device disposed on the respective fluid warming unit.

18. The device as recited in claim 17, wherein the activation device on the fluid warming unit identification device is further structured and arranged to provide a signal to an audio identification device disposed on the respective fluid warming unit such that, when the activation device is activated, the audio identification device emits an audible signal.

19. The system as recited in claim 12, wherein each of the more than one fluid containers is an intravenous drip bag.

20. The system as recited in claim 12, wherein the controller can access formulae or a look-up table that provides duty-cycle adjustments for a multiplicity of fluid temperature differentials.

21. The system as recited in claim 12, wherein the processing unit apportions the work cycle of the power supply source so that the duty-cycle of each fluid warming unit is accomplished during the work cycle.

22. A method for controlling fluid temperatures from more than one fluid containers prior to their infusion into a human body, the method comprising:

providing a plurality of fluid warming units, each having a controllable duty-cycle, to heat a fluid from the more than one fluid containers;

providing power from a single power supply source to each of the plurality of fluid warming units during a work cycle;

providing a thermal sensor to sample a fluid temperature in each of the plurality of fluid warming units;

providing fluid temperature data to a controller; and

adjusting the duty-cycle of each fluid warming unit based on the fluid temperature data, so that, during each work cycle, available power from the single power supply source is provided to only one of the fluid warming units at a time.

23. The method as recited in claim 22, wherein adjusting the duty-cycle of each fluid warming unit includes:

comparing fluid temperature data with a permissible fluid temperature range;

calculating a fluid temperature differential therefrom;

calculating a duty-cycle time for each of the plurality of fluid warming unit for each work cycle; and

transmitting duty-cycle signals to each of the plurality of fluid warming units.

24. The method as recited in claim 23, wherein calculating a duty-cycle time for each fluid warming unit includes using formulae or a look-up table that provides duty-cycle adjustments for a multiplicity of fluid temperature differentials.

25. The method as recited in claim 23, wherein calculating the duty-cycle time for each of the plurality of fluid warming units includes apportioning the work cycle of the power supply source so that the duty-cycle of each fluid warming unit is accomplished during the work cycle.