Compensating drug delivery system
First Claim
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1. A device for delivery of a liquid medicament to an animal comprising:
- a reservoir for containing the liquid medicament;
a needle for penetrating the skin of the animal;
a flow tube in fluid communication with the needle and the reservoir;
means for causing the liquid medicament to flow from the reservoir to the animal;
a memory device for storing a schedule of delivery of the liquid medicament to an animal in terms of dose or dosing rate or both dose and dosing rate as a function of time;
a meter for measuring the time required for an increment of liquid medicament to flow a prescribed distance along the flow tube; and
a valve for starting and stopping liquid flow in the flow tube in a periodic manner;
wherein the time the valve is open or closed each period is adjusted to compensate for changes in system parameters as determined by measurements made by the meter so that the schedule of delivery is followed.
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Abstract
A compensating drug delivery system for delivery of medicaments to animals is described. A drug-containing reservoir is connected to a needle array through a flow tube. Medicament delivery to the animal through this flow tube is regulated by the combined action of a metering means and a valving means, and inaccuracies in delivery rate are compensated. The metering means and the valving means are microprocessor controlled to insure that the medication administered is according to a pre-established protocol.
139 Citations
18 Claims
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1. A device for delivery of a liquid medicament to an animal comprising:
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a reservoir for containing the liquid medicament;
a needle for penetrating the skin of the animal;
a flow tube in fluid communication with the needle and the reservoir;
means for causing the liquid medicament to flow from the reservoir to the animal;
a memory device for storing a schedule of delivery of the liquid medicament to an animal in terms of dose or dosing rate or both dose and dosing rate as a function of time;
a meter for measuring the time required for an increment of liquid medicament to flow a prescribed distance along the flow tube; and
a valve for starting and stopping liquid flow in the flow tube in a periodic manner;
wherein the time the valve is open or closed each period is adjusted to compensate for changes in system parameters as determined by measurements made by the meter so that the schedule of delivery is followed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of delivering a liquid medicament to an animal including the steps of
a) providing a two component drug delivery device wherein the first component comprises a reservoir for containing a liquid medicament, a needle for penetrating the skin of the animal, a flow tube connecting the reservoir and the needle, and a means for causing the medicament to flow from the reservoir to the animal, and wherein the second component is matable with the first component and comprises a valve for starting and stopping flow in the tube, a memory device for storing a delivery schedule for the liquid medicament in terms of dose or dosing rate or both dose and dosing rate as a function of time, and a meter for measuring the time required for an increment of the liquid medicament to flow a prescribed distance along the flow tube, b) using the meter to measure the time required for an increment of the liquid medicament to flow a prescribed distance along the flow tube, and c) using the measured time to deliver the liquid medicament according to the schedule by adjusting the time that the valve is open or closed to compensate for changes in system parameters.
Specification