Frozen plasma thawing system

• US 4,486,389 A
• Filed: 06/28/1982
• Issued: 12/04/1984
• Est. Priority Date: 06/28/1982
• Status: Expired due to Fees

• Current Assignee: Cryosan Incorporated
• Original Assignee: Cryosan Incorporated
• Inventors: Kuzyk, Roman, Darnell, John W.
• Primary Examiner(s): Richman, Barry
• Assistant Examiner(s): Johnson, William R.
• Application Number:
  US06/392,641
• Time in Patent Office: 890 Days
• Field of Search: 422/25, 422/40, 422/41, 422/301, 422/99, 422/300, 422/307, 165/46, 165/80 R, 165/80 E, 165/104.19, 604/408, 248/95, 248/99
• US Class Current: 422/307
• CPC Class Codes: A61M 2205/366 by liquid heat exchangers
• CPC Class Codes: A61M 5/445 the media being heated in the reservoir, e.g. warming bloodbags

Abstract

A technique and apparatus for thawing a frozen blood plasma unit while maintaining the unit in a dry condition includes a water bath and a special holder which supports a thin plastic bag in which the plasma unit is contained. The holder maintains the bag and the plasma unit submerged in a manner which affords substantial thermal contact between the plasma unit and the water bath.

Claims

1. A system for thawing frozen plasma units comprising a water bath;

a thin, flexible, waterproof pouch having a portion vented to the atmosphere, the pouch being receptive to a frozen plasma unit;

means for supporting the pouch within the water bath so that the lower end of the pouch when containing a plasma unit, is maintained in a substantially submerged position while the vented portion of the pouch is maintained in spaced relation from the water level of the bath and in communication with the atmosphere;

said pouch being sufficiently flexible as to be capable of conforming into intimate contact with a plasma unit contained therein under the influence of the pressure of the water in which the pouch is submerged,

whereby a frozen plasma unit may be thawed rapidly and uniformly while maintained in a dry condition.

2. A system as defined in claim 1 wherein the flexible pouch is polyethylene having a thickness of not substantially greater than 1 mil.

3. A system as defined in claim 1 wherein the means to support the bag comprises:

a pouch holder having a top wall and a lower wall, spaced below the top wall, each of the top wall and lower wall having at least one slot therein to form at least one pouch receiving slot pair;

means for supporting the holder so that its lower wall is substantially at or below the water level of the water bath.

4. A device as defined in claim 3 further comprising means for adjustably positioning the height of the holder.

5. A system as defined in claim 3 wherein each of the top and lower walls is provided with a plurality of slots extending along one edge of each wall, the slots being arranged in pairs, in which each pair includes an upper and a lower slot.

6. A system as defined in claim 3 wherein the holder further comprises:

each of the top and lower walls includes slots formed alternately on opposite edges of the respective wall facing in alternately different directions.

7. A system as defined in claim 3 further comprising:

the water bath including a tub having sidewalls;

the pouch holder being located with respect to one of the sidewalls of the tub so that there is a substantial space between said sidewall and said holder, said substantial space providing a region to facilitate insertion and removal of the pouches from said at least one slot pair and from the system.

8. A system as defined in claim 7 wherein the holder further comprises:

the top wall being longer than the bottom wall and defining laterally extending flanges, the flanges being adapted to rest on the upper edge of the sidewall of the water bath tub.

9. A system as defined in claim 8 further comprising:

the lateral flanges of the holder being provided with slots adapted to receive upwardly extending registration pins mounted to the sidewalls of the bath tub.