Flow control device for administration of iv fluids

Details Flow control device for administration of iv fluids Flow control device for administration of iv fluids

A - Human Necessities

61

M

128/91

A61M 5/14 (2006.01) A61M 5/168 (2006.01) G01F 13/00 (2006.01)

Patent

CA 1174136

ABSTRACT OF THE DISCLOSURE A metering apparatus and system for controlling the adminis- tration of intravenous fluids (IV) is provided herein. The apparatus and system includes a flow metering valve including (i) a housing defin- ing a fluid passageway having opposite upper and lower ends, the passage- way including a valving surface; (ii) a metering member having a body axially moveable relative to the valving surface, the metering member defining a flow metering notch in one surface, the notch having a cross- sectional area which varies axially along the member for metering flow therealong, the metering member further defining a flow passageway for establishing a purge position, the metering member having a first closed position with the body blocking flow at the valving surface, a second purge position with flow across the valving surface at the flow passage- way and a third metering position with flow across the valving surface through the notch, the second purge position establishing a greater flow rate than the third metering position; (iii) actuating means cooperative with the metering member to axially progressively displace the member relative to the valving surface to establish continuous and infinite flow metering along the notch portion of the flow passage in the third position whereby the user can establish a predetermined flow rate. It also includes a drip chamber, means connecting the drip chamber to the source of fluid, and tubing means connected to the drip chamber and terminating at administration means. Accordingly, accurately and highly predictable and repeatable flow rates can be achieved by positioning the metering pin with respect to the valve seat to vary the flow area through the valve.

390052

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