Rapid infusion device

A rapid infusion system for rapidly delivering filtered, bubble free, warmed volume to a patient, said rapid infusion device comprising in combination:

• (a) a pre-assembled unitary disposable unit;
• and
• (b) a permanent durable unit;
• wherein said disposable unit includes all sub-components that will come into contact with the volume infused to the patient including a disposable flexible length of tubing serving as a pumping chamber;
• wherein said permanent durable unit includes reusable components including driving means and related control means therefor, pump means operably connected to said drive means, heating means for heating the volume, and housing means, said flexible tubing having opposite ends thereof connected to said pre-assembled unitary disposable unit whereby said disposable unit and said length of tubing can be disposed of after use;
• wherein said housing means supports said pump means, said unitary disposable unit, flexible tubing, said heating means, said drive means, and said related control means whereby a filtered, bubble free warmed volume of predetermined temperature may be infused to a patient at a predetermined flow rate;
• wherein said preassembled unitary disposable unit further includes a pair of manually operable two-way valves and an adjustable pressure controlled by-pass valve;
• wherein said adjustable pressure controlled by-pass valve includes a cylindrical housing which encloses a spring loaded ball valve and an adjusting screw which can be adjusted to set the spring bias on said ball valve with respect to a cooperating seat whereby a patient line pressure in excess of the predetermined setting forces said ball to unseat and by-pass a portion of said volume back to said reservoir;
• and
• wherein said predetermined setting is in the range of 230 to 300 mm Hg.

A rapid infusion system for rapid delivery of filtered, bubble free, warmed volume to a patient, said rapid infusion system comprising a preassembled unitary disposable subsystem, a permanent reusable subsystem and a disposable length of PVC tubing which serves as a pumping chamber and interconnects portions of said preassembled unitary disposable subsystem;

• said preassembled unitary subsystem comprising reservoir means with filter means mounted therein, heat exchange unit means and volume pathways including valve means;
• said disposable length of PVC tubing having opposite ends interconnected with said reservoir means and said heat exchange unit means at opposite ends thereof;
• said permanent reusable subsystem comprising motor drive means and first housing means enclosing said motor drive means and including control panel means;
• second housing means mounted on top of said first housing means;
• pump means and heater element means mounted on said second housing means;
• said second housing means serving as a supporting base for said preassembled unitary disposable subsystem whereby any desired volume may be infused rapidly into a patient;
• and
• wherein said reservoir means, said heat exchange unit means, and said volume pathways of said disposable subsystem are formed simultaneously through joining of two halves after which said filter means are placed in said reservoir means, said two halves are then joined and sealed for liquid integrity.

A rapid infusion system for rapid delivery of filtered, bubble free, warmed volume to a patient, said rapid infusion system comprising a preassembled unitary disposable subsystem, a permanent reusable subsystem and a disposable length of PVC tubing which serves as a pumping chamber and interconnects portions of said preassembled unitary disposable subsystem;

• said preassembled unitary subsystem comprising reservoir means with filter means mounted therein, heat exchange unit means and volume pathways including valve means;
• said disposable length of PVC tubing having opposite ends interconnected with said reservoir means and said heat exchange unit means at opposite ends thereof;
• said permanent reusable subsystem comprising motor drive means and first housing means enclosing said motor drive means and including control panel means;
• second housing means mounted on top of said first housing means;
• pump means and heater element means mounted on said second housing means;
• said second housing means serving as a supporting base for said preassembled unitary disposable subsystem whereby any desired volume may be infused rapidly into a patient;
• and
• wherein said filter means comprises a two stage system wherein said first stage is a coarse filter formed by a coarse plastic material which removes material over 100-150 microns in size;
• said second stage serving as the fine filter removing impurities in the 27 to 40 micron size.

A rapid infusion system for rapid delivery of filtered, bubble free, warmed volume to a patient comprising an integral disposable unit which includes all sub-components that come into contact with the volume infused to a patient, a permanent durable unit which comprises the reusable components including drive means operably connected to pump means;

• heater means and associated controls therefor, and a disposable length of flexible tubing which serves as the pumping chamber of said pump means and interconnects pathways of said integral disposable unit whereby a warm, filtered, bubble free volume of blood or other fluid may be rapidly infused into a patient by a single medical person;
• wherein said integral disposable unit further includes a pair of manual two-way valves and an adjustable spring loaded pressure control valve, said pair of manual two-way valves mounted in volume pathways whereby said two-way valves can be set to direct volume back to said reservoir when operating the device in its de-aerating and warming modes;
• wherein said adjustable spring loaded pressure control valve further includes a cylindrical housing in which said spring loaded valve is mounted, said cylindrical housing enclosing an adjusting screw, stationary disc with a threaded aperture, coil spring and ball valve whereby said adjusting screw biases said coil spring into contact with said ball valve to maintain it closed until a predetermined pressure is reached;
• and
• wherein said predetermined normal pressure setting of said adjusting screw is in the range of 230-300 mm Hg.