초록 ▼

A portable intravenous fluid warming system wherein the temperature monitoring and control is accomplished utilizing four monolithic IC thermosensors. The sensors operate in a serial multi-stage fashion with the first sensor functioning so as to provide a ramp or build up to the next stage thus smoo

A portable intravenous fluid warming system wherein the temperature monitoring and control is accomplished utilizing four monolithic IC thermosensors. The sensors operate in a serial multi-stage fashion with the first sensor functioning so as to provide a ramp or build up to the next stage thus smoothly and gently increasing the temperature of the fluid and reducing the dynamic range required for the final heater stage, thus ensuring a more accurate and consistent output temperature. Power FET's provide heater drive current from an unregulated DC input source. The sensor is coupled to a microprocessor that is factory preprogrammed with predetermined set points. The microprocessor will continuously determine the temperature so as to allow determination of when the desired temperature is reached and will adjust power to the FET as necessary to hold the temperature at the correct point without exceeding the temperature. Interfacing is provided to an optional external digital readout unit for monitoring. The addition of an in-line thermocircuit breaker will provide an independent over-temperature shutdown failsafe.

대표청구항 ▼

[ What is claimed is:] [1.] A portable intravenous fluid warming system comprising:a housing having an intravenous fluid input port and intravenous fluid output port;a plurality of groups of interconnected tube sections in said housing carrying said intravenous fluid to be warmed between said input

[ What is claimed is:] [1.] A portable intravenous fluid warming system comprising:a housing having an intravenous fluid input port and intravenous fluid output port;a plurality of groups of interconnected tube sections in said housing carrying said intravenous fluid to be warmed between said input port and said output port, each one of said tube sections having an outer periphery;a first group of said plurality of tube sections in said housing for receiving intravenous fluid to be warmed from said input port and forming a group of staged heating sections;a final section of tube in said housing for dispensing said warmed I.V. fluid to said output port and forming a final heating stage; anda like plurality of flexible heating elements as said plurality of tube sections for heating the intravenous fluid therein, each one of said flexible heating elements being wrapped around, in contact with, and surrounding at least the majority of the peripheral surface of a corresponding tube section.