Drug dispensing system

Details Drug dispensing system Drug dispensing system

1987-05-11

1989-05-30

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604236, 604231, A61M 3700, A61M 5315

Patent

active

048347051

ABSTRACT:
The drug dispensing set includes a reservoir having a cylinder for receiving a primary infusion solution at the proximal end and a piston which slides within the cylinder in seal-tight relation. The piston includes a one-way valve to permit passage of the primary infusion solution to the distal side of the piston under pump pressure. A Y-site or three-way valve is connected in the tubing downstream of the reservoir to permit infusion of a drug dosage into the distal end of the cylinder while the piston moves towards the proximal end of the cylinder under the pressure of the delivered drug dosage. The drug dosage is subsequently dispensed from the reservoir when the pump is re-started and the primary infusion solution following the drug dosage serves to flush the tubing of the drug dosage.

REFERENCES:
patent: 657440 (1900-09-01), McCaw
patent: 1563627 (1925-12-01), Hein
patent: 1624990 (1927-04-01), Smith
patent: 3699961 (1972-10-01), Szpur
patent: 3976068 (1976-08-01), Lundquist
patent: 4299238 (1981-11-01), Baidwan et al.
patent: 4453934 (1984-06-01), Gahwiler et al.
patent: 4464174 (1984-08-01), Ennis
patent: 4690154 (1987-09-01), Woodford et al.

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