Intravenous drug mixing and flow device

Details Intravenous drug mixing and flow device Intravenous drug mixing and flow device

1987-06-29

1989-02-07

Rosenthal, Arnold

Valves and valve actuation

With restrictor in parallel to main valve

251 9, 251 10, 251 7, 604 34, 604250, F16K 706, F16K 4708, A61M 500

Patent

active

048026506

ABSTRACT:
A set for the passive infusion of one or more medications at a determined rate includes a fluid supply tube having first and second branched flow paths with first and second rate-defining flow restrictors. An injection port upstream of the first flow restrictor permits injection of a drug to be metered, so the first restrictor provides a metered flow of drug plus carrier, and the second restrictor provides a metered flow of diluent/carrier. A Y-connector, which may contain a mixing element, combines the two flows to provide the desired output flow and drug concentration. Further flow branches, each with an injection port and a flow restrictor, allow additional drugs to be metered in other concentrations. A flushable flow restrictor segment includes a flexible flow tube which may be pinched off, and a substantially rigid capillary tube integral with the flexible tube. End connectors adapt the segment for placement in an infusion line, and a pinch clamp surrounds the flow tube, so that the segment may be opened for flushing yet conveniently clamped to a determined flow rate by the pinch clamp. Various delivery rates are achieved with series or parallel arrangements of such flow restrictor segments. A flow restrictor with a branched end connector connects to a pressure monitor.

REFERENCES:
patent: 4267835 (1981-05-01), Barcer et al.
patent: 4322054 (1982-03-01), Campbell
patent: 4373524 (1983-02-01), Leibinsohn
patent: 4673161 (1987-06-01), Flynn et al.
patent: 4718634 (1988-01-01), Bond
patent: 4743235 (1988-05-01), Waldbilling et al.

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