Multiple plate fluid warmer unit

• US 6,882,797 B2
• Filed: 03/26/2003
• Issued: 04/19/2005
• Est. Priority Date: 03/26/2003
• Status: Expired due to Fees

• Current Assignee: Gaymar Industries Incorporated (Stryker Corporation)
• Original Assignee: Gaymar Industries Incorporated (Stryker Corporation)
• Inventors: Stewart, Thomas P., Paolini, Raymond P.
• Primary Examiner(s): CAMPBELL, THOR S
• Application Number:
  US10/397,110
• Publication Number:
  US 20040190884A1
• Time in Patent Office: 755 Days
• Field of Search: 392/470, 392/479, 392/480, 219/518, 604/113, 604/93.01
• US Class Current: 392/470
• CPC Class Codes: A61M 5/445 the media being heated in the reservoir, e.g. warming bloodbags

Abstract

The present invention is directed to a parenteral fluid warming system. The system has at least first and second fluid warming bags and a warmer device. Each of the at least first and second fluid warming bags have an inlet, an outlet, a top surface, a bottom surface, and a fluid path extending between the inlet and the outlet. In a first embodiment of the present invention, the outlet from the first bag directs the fluid into the inlet of the second bag. In an alternative version of the first embodiment, the first bag and the second bag are a interconnected to each other. The warmer device has at least first and second energy reservoirs that correspond with the number of fluid warming bags. Each energy reservoir also has at least one heater unit.

Claims

1. A parenteral fluid warming system comprising:

a) at least a first and a second fluid warming bag, every fluid warming bag having an inlet, an outlet, a top surface, a bottom surface, and a fluid path extending between the inlet and the outlet, wherein the coldest fluid path portion is the portion of the fluid path receiving fluid from the inlet, and the warmest fluid path portion is the portion of the fluid path providing fluid to the outlet, wherein the outlet from the first bag directs the fluid into the inlet of the second bag;

b) a warmer device having at least a first energy reservoir and a second energy reservoir;

each energy reservoir corresponds with at least one fluid warming bag, the first energy reservoir has a first heating pad and the second energy reservoir has a second heating pad, the first heating pad is capable of generating thermal energy at a different temperature in relation to the second heating pad;

c) the top surface and/or the bottom surface of each fluid warming bag, when positioned within a respective energy reservoir, is in thermal proximity to the heating pad in the respective energy reservoir; and

d) each heating pad generates thermal energy to provide a desired temperature to the fluid in each of at least first and second bags which are positioned within the respective at least first and second energy reservoir.

2. The parenteral fluid warming system of claim 1 wherein the fluid from the outlet of each of the first and the second fluid warming bags has a different temperature.

3. The parenteral fluid warming system of claim 1 wherein the fluid from the outlet of each of the first and the second fluid warming bags has the same temperature.

4. The parenteral fluid warning system of claim 1 wherein the first and second energy reservoirs share a common heating pad.

5. The parenteral fluid warning system of claim 1 wherein the first energy reservoir has the first heating pad and a third heating pad, and the second energy reservoir has the second heating pad and a fourth heating pad.

6. The parenteral fluid warming system of claim 5 wherein the first, second, third and fourth heating pads are independent from each other.

7. The parenteral fluid warming system of claim 5 wherein the third and the fourth heating pads are the same heating pad.

8. The parenteral fluid warming system of claim 1 wherein the first energy reservoir has the first heating pad and a third heating pads between a first slot that receives the first fluid warming bag, and the second energy reservoir has the second heating pad and a fourth heating pads between a second slot that receives the second fluid warming bag.

9. The parenteral fluid warming system of claim 1 wherein the fluid path of the fluid warming bag is tortuous.

10. The parenteral fluid warming system of claim 1 wherein the fluid path of the fluid warming bag is serpentine.

11. The parenteral fluid warming system of claim 1 further comprising a temperature controller for controlling the temperature of the fluid to a set temperature.

12. The parenteral fluid warming system of claim 11 wherein the temperature controller transmits a first alarm if the temperature of the fluid exceeds the set temperature by a predetermined first value.

13. The parenteral fluid warming system of claim 12 wherein the predetermined first value is 0.1 to 5.0°

C.

14. The parenteral fluid warming system of claim 12 wherein the temperature controller transmits a second alarm if the temperature of the fluid exceeds the set temperature by a predetermined second value wherein the predetermined second value is greater than the predetermined first value.

15. The parenteral fluid warming system of claim 14 wherein the second alarm shuts down the system.

16. The parenteral fluid warming system of claim 12 wherein the first alarm shuts down the system.

17. The parenteral fluid warning system of claim 1 further comprising a third energy reservoir.

18. The parenteral fluid warming system of claim 1 wherein the fluid that is warmed in the bags to a set temperature can be delivered at any reasonable flow rate to a patient.

19. The parenteral fluid warming system of claim 1 wherein the first and second bags are a single unit.

20. The parenteral fluid warming system of claim 1 further comprising a flow rate measuring device that monitors the flow rate of the fluid.

21. The parenteral fluid warming system of claim 20 wherein the flow rate measuring device transmits a signal to the system to decrease the temperature of the fluid when the flow rate exceeds a predetermined flow rate.

22. The parenteral fluid warming system of claim 20 wherein the flow rate measuring device transmits a signal to the system to increase the temperature of the fluid when the flow rate falls below a predetermined flow rate.