Portable fluid warmer

A warming device, for warming infusion or transfusion fluids by an exothermic reaction of a reactive liquid, wherein said warming device comprises:

• a planar reaction chamber and a secondary chamber;
• the reaction chamber and the secondary chamber are aligned end on and are abutting;
• the reaction chamber containing a trigger;
• the reaction chamber comprising:
• an upper sheet;
• a lower sheet spaced apart and parallel to the upper sheet;
• and
• a plurality of spaced apart connections between the upper sheet and the lower sheet;
• the reaction chamber being at least partially empty and unexpanded;
• the secondary chamber containing said reactive liquid;
• the secondary chamber is compressible;
• an inlet positioned between the secondary chamber and the reaction chamber to allow passage of the reactive liquid from the secondary chamber into the reaction chamber to thereby expand the reaction chamber and contact of the reactive liquid with the trigger resulting in exothermic reaction and crystallization of the reactive liquid in the expanded reaction chamber;
• the inlet being transversely elongate relative to the flow of the reactive liquid;
• the trigger being spaced apart from the inlet;
• a frangible or removable barrier closing the inlet;
• a passageway extending through said reaction chamber, the passageway configured to receive a flow of said infusion or transfusion fluids therethrough;
• and
• the passageway, the reaction chamber and the secondary chamber all being flexible, so that the secondary chamber can be rolled up,
• wherein the reaction chamber can be rolled around the rolled up secondary chamber,
• wherein the upper sheet and the lower sheet of the reaction chamber are configured to move apart, constrained by the plurality of spaced apart connections, upon ingress of the reactive liquid into the expanded reaction chamber, and
• wherein at least one of the upper sheet or the lower sheet are spaced apart from the passageway in the expanded reaction chamber.

An apparatus, comprising:

• a reaction chamber, the reaction chamber comprising a trigger, the reaction chamber being at least partially empty and unexpanded, the reaction chamber further comprising tubing extending through the reaction chamber from a tubing inlet to a tubing outlet, the tubing defining a passageway between the tubing inlet and the tubing outlet, the passageway configured to receive a flow of fluid therethrough;
• a secondary chamber, the secondary chamber containing a reactive liquid, wherein the secondary chamber is compressible;
• an inlet port positioned between the secondary chamber and the reaction chamber, the inlet port comprising a barrier closing the inlet port, wherein said barrier is configured for opening, wherein upon barrier opening the inlet port is configured to allow a flow of the reactive liquid from the secondary chamber into the reaction chamber to thereby expand the reaction chamber and contact of the reactive liquid with the trigger resulting in exothermic reaction and crystallization of the reactive liquid in the expanded reaction chamber;
• the reaction chamber further comprising the trigger spaced apart from the inlet port;
• and
• the secondary chamber configured to be rolled up and the reaction chamber configured to be rolled around the rolled up secondary chamber.