Method and apparatus for administering a drug to a patient
First Claim
1. An apparatus for administering a drug to a patient comprising:
- a reservoir of diluent liquid,support means supporting a syringe, the syringe having a cylinder and a plunger movable in the cylinder;
actuator means engagable with the plunger to move the plunger into and out of the cylinder; and
control means for generating drive signals at intervals to which the actuator means is responsive to cause a reciprocating movement of the plunger in the cylinder, thereby causing the plunger to perform a delivery stroke during which a quantity of a drug in the cylinder is expelled, and an intake stroke in which a quantity of a diluent liquid is drawn into the cylinder.
0 Assignments
0 Petitions
Accused Products
Abstract
A method of administering a drug to a patient comprises the steps of filling a dispenser (20) with a predetermined total volume of a liquid containing the drug and administering a predetermined volume of the liquid in the dispenser to the patient (10) The liquid in the dispenser is then replaced with a diluent (22). The administration of liquid and replacement with diluent (22) are then repeated from time to time so that diminishing doses of the drug are administered to the patient (10). Preferably the diluent (22) is drawn into the dispenser (20) prior to the drug containing liquid being administered. The method is preferably- patient (10) controlled via control push button (48). The invention extends to apparatus which is used to carry out the method.
173 Citations
7 Claims
-
1. An apparatus for administering a drug to a patient comprising:
-
a reservoir of diluent liquid, support means supporting a syringe, the syringe having a cylinder and a plunger movable in the cylinder; actuator means engagable with the plunger to move the plunger into and out of the cylinder; and
control means for generating drive signals at intervals to which the actuator means is responsive to cause a reciprocating movement of the plunger in the cylinder, thereby causing the plunger to perform a delivery stroke during which a quantity of a drug in the cylinder is expelled, and an intake stroke in which a quantity of a diluent liquid is drawn into the cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification