Intravenous fluid warming cassette with stiffening member and integral handle

• US 6,464,666 B1
• Filed: 10/08/1999
• Issued: 10/15/2002
• Est. Priority Date: 10/08/1999
• Status: Expired due to Term

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: Augustine Medical, Inc. (3M Company)
• Inventors: Maharaj, Gary R., Woodwick-Sides, Teryl L., Entenman, Scott A., Augustine, Scott D., Leland, Keith J.
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): WILLIAMS, CATHERINE SERKE
• Application Number:
  US09/415,405
• Time in Patent Office: 1,103 Days
• Field of Search: 604/93.01, 604/113, 604/114, 604/6.13, 604/122-127, 604/403, 604/408, 392/465, 392/470, 165/46, 222/146.1, 222/146.2, 222/146.5
• US Class Current: 604/113
• CPC Class Codes: A61F 7/0085 Devices for generating hot or cold treatment fluids
• CPC Class Codes: A61J 1/16 Holders for containers
• CPC Class Codes: A61J 2200/42 Heating means
• CPC Class Codes: A61M 5/44 having means for cooling or heating the devices or media
• CPC Class Codes: A61M 5/445 the media being heated in the reservoir, e.g. warming bloodbags
• CPC Class Codes: Y10T 137/6579 Circulating fluid in heat exchange relationship

Abstract

A fluid warming cassette with a stiffening frame structure and an integral handle is provided to support a parenteral fluid container. The fluid container is desirably thin to minimize heat exchange inefficiencies. The frame structure permits the thin fluid container to be inserted into the narrow space between fixed position warming plates of a warming unit. The frame structure has a quadrilateral shape with sides and ends. The fluid container is attached, at its periphery to the sides and ends of the frame structure, within the quadrilateral shape. Part of the frame structure is formed into a handle to assist in both the insertion and removal of the cassette from a warming unit.

Claims

1. A method of operating a parenteral fluid warming system that includes a warming unit having parallel heating plates with alignment grooves and a fluid warming cassette with a quadrilateral frame structure having a distal end, a proximal handle, alignment lands, and a stop mechanism near the proximal handle, the warming cassette further including a fluid container with a fluid pathway, in which the fluid container is joined to the frame structure, the method including:

grasping the proximal handle;

orienting the lands with the grooves;

inserting the distal end between the heating plates; and

sliding the warming cassette between the heating plate until the stop mechanism engages the warming unit.

2. The method of claim 1, further including transferring heat from the heating plates to the fluid container.

3. The method of claim 1, further including providing parentarel fluid to the fluid pathway.

4. The method of claim 3, wherein providing includes providing the parentarel fluid under pressure.

5. The method of claim 3, further including transferring heat from the heating plates to the fluid container.

6. The method of claim 5, wherein providing includes providing the parentarel fluid under pressure.