Patient controllable drug delivery system flow regulating means
First Claim
1. A patient controllable drug delivery system capable of delivering a drug to a patient via a patient line, the system including:
- (i) a main reservoir for holding the drug;
(ii) a metering device comprising an intermittent dose reservoir and a plunger biased towards a retracted position;
(iii) a fill-line located between the main reservoir and the intermittent dose reservoir which allows continuous fluid communication between the main reservoir and the intermittent dose reservoir via a metering device fill-point; and
(iv) a flow regulating means located in-line between the metering device and the patient line, wherein the flow regulating means comprises;
(a) a pressure set one-way valve; and
(b) a means for receiving and dispensing a dose of drug, said means having an inlet means and an outlet means through which a drug may pass;
characterised in that the one-way valve is located prior to the inlet, the valve is closed when the flow regulating means is dispensing a drug and open when receiving a drug.
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Accused Products
Abstract
A patient controllable drug delivery system including a metering device (30) having an intermittent dose reservoir (34) and a plunger, a main reservoir (26), a fill line (32connecting the main reservoir (26) and the intermittent reservoir (34) via a metering device fill point (26) and a flow regulating means (10) between the metering device (30) and the patient line (36), the flow regulating means (10) comprising a means for receiving and dispensing a dose of drug (12) and a pressure set one way valve (16), the intermittent dose reservoir (34) and the patient line (36) being in restricted fluid communication, dispensation of the drug being effected by pressure applied by the receiving and dispensing means (12). Systems for the supply of a continuous dose in addition to the patient controllable delivered dose, and a secondary delivery system are also disclosed.
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Citations
19 Claims
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1. A patient controllable drug delivery system capable of delivering a drug to a patient via a patient line, the system including:
- (i) a main reservoir for holding the drug;
(ii) a metering device comprising an intermittent dose reservoir and a plunger biased towards a retracted position;
(iii) a fill-line located between the main reservoir and the intermittent dose reservoir which allows continuous fluid communication between the main reservoir and the intermittent dose reservoir via a metering device fill-point; and
(iv) a flow regulating means located in-line between the metering device and the patient line, wherein the flow regulating means comprises;(a) a pressure set one-way valve; and
(b) a means for receiving and dispensing a dose of drug, said means having an inlet means and an outlet means through which a drug may pass;
characterised in that the one-way valve is located prior to the inlet, the valve is closed when the flow regulating means is dispensing a drug and open when receiving a drug. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- (i) a main reservoir for holding the drug;
Specification