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US 4,538,918 AGranted
Medication mixing and sequential administration device
AssigneeTrimedyne, Inc.
InventorHerbert Mittleman
Life of this patent
Estimating the term…
Abstract
The present invention teaches a medical device which mixes a primary medication with a secondary medication before administration to a patient. The device is also capable of automatically sequentially administering the primary medication alone to the patient. The device includes a medication chamber which is reduced in volume to deliver the secondary medication for mixing with the primary medication.
Claims16
A medication mixing device for use with a primary medication source, the device comprising:
- (a) a housing defining a first confined space and a second confined space separated by a movable partition, the first space being adapted to receive a secondary medication;
- (b) a mixing cell mounted on the housing and having an outlet;
- (c) an inlet on the housing for receiving primary medication from the primary medication source;
- (d) a secondary medication fluid passageway in fluid communication with the first confined space and the cell;
- (e) a first fluid passageway in fluid communication with the inlet and the second confined space;
- (f) a second fluid passageway in fluid communication with the inlet, the first fluid passageway and the mixing cell such that a positive fluid pressure at the inlet generates a positive fluid pressure in the second confined space to drive the partition so as to displace secondary medication from the first confined space into the cell to mix with primary medication entering the cell through the second passageway.
3 more elements
A medication diluting device for use with a diluent supply, the device comprising:
- (a) a housing defining an enclosure and a chamber separated by a flexible member, the chamber being adapted to receive a medication;
- (b) a mixing cell having a top portion and a bottom portion and an outlet on the bottom portion, the top portion of cell being mounted on the housing;
- (c) an inlet mounted on the housing for receiving diluent from the diluent supply;
- (d) a medication fluid passageway in fluid communication between the chamber and opening into the top portion of the cell;
- (e) a first fluid passageway in fluid communication with the inlet and the enclosure;
- (f) a second fluid passageway in fluid communication with the enclosure and opening into the top portion of the mixing cell such that a positive fluid pressure at the inlet generates a positive pressure in the enclosure to drive the flexible member to reduce the chamber volume and displace medication from the chamber and into the cell to mix with diluent entering the cell through the third passageway;
- (g) diluent flow regulating means associated with the second fluid passageway for regulating the flow of liquid into the cell;
- and
- (h) medication flow regulating means cooperating with the medication fluid passageway for regulating the flow of medication into the cell.
6 more elements
Dependencies are inferred from the claim text.