System and apparatus for the patient-controlled delivery of a beneficial agent, and set therefor
First Claim
1. A system for the patient-controlled delivery of a beneficial agent, comprising:
- (a) supply means for storing the beneficial agent;
(b) conduit means for transporting the beneficial agent from the supply means to a dose reservoir;
(c) pump means for expressing the beneficial agent out of the supply means through the conduit means and into a dose reservoir at a controlled rate;
(d) a dose reservoir for receiving a dose of beneficial agent from the supply means;
(e) control means operative by the patient for selectively expressing the beneficial agent out of said dose reservoir, through an outlet thereof, in at least one of discrete dose volumes or fractional dose volumes, as selected by the patient; and
(f) excess dose prevention means for supplying the beneficial agent to the dose reservoir at a predetermined flow rate that fills the volume of the dose reservoir substantially linearly with time up to the discrete dose volume;
(g) wherein said system is patient-wearable and permits the patient to be ambulatory.
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Accused Products
Abstract
An apparatus (60) and system (20) are disclosed for the patient-controlled delivery of an analgesic or other beneficial agent 142, while preventing administration of a toxic quantity of the beneficial agent. The invention permits delivery of fractional doses to a patient in quantities which are directly proportional to the time period since the last dose or fraction thereof was delivered to the patient. In the preferred embodiments the apparatus includes a housing (58) including a casing (88) and a back plate (86), the housing containing a control switch (84) for opening and closing downstream conduit (62) and for depressing a floating plate (100) that thereby compresses a dose reservoir (90) with the beneficial agent (142) therein. A spring (124) biases the control switch (84).
152 Citations
30 Claims
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1. A system for the patient-controlled delivery of a beneficial agent, comprising:
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(a) supply means for storing the beneficial agent; (b) conduit means for transporting the beneficial agent from the supply means to a dose reservoir; (c) pump means for expressing the beneficial agent out of the supply means through the conduit means and into a dose reservoir at a controlled rate; (d) a dose reservoir for receiving a dose of beneficial agent from the supply means; (e) control means operative by the patient for selectively expressing the beneficial agent out of said dose reservoir, through an outlet thereof, in at least one of discrete dose volumes or fractional dose volumes, as selected by the patient; and (f) excess dose prevention means for supplying the beneficial agent to the dose reservoir at a predetermined flow rate that fills the volume of the dose reservoir substantially linearly with time up to the discrete dose volume; (g) wherein said system is patient-wearable and permits the patient to be ambulatory. - View Dependent Claims (2)
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3. An apparatus for the patient-controlled delivery of a beneficial agent comprising:
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(a) a dose reservoir for receiving and storing a dose of beneficial agent; (b) an inlet to said dose reservoir, for receiving the beneficial agent under pressure; (c) an outlet to said dose reservoir, through which beneficial agent in said dose reservoir exits said dose reservoir; (d) downstream passageway means having a proximal end in communication with said outlet; and (e) control means operative by the patient for selectively expressing the beneficial agent out of said dose reservoir, through said outlet, said control means comprising (i) valve means having a closed mode of operation whereby said downstream passageway means is closed and an open mode of operation whereby said downstream passageway means is open, permitting flow of the beneficial agent therethrough; (ii) biasing means for biasing said valve means in said closed operating mode; (iii) dose reservoir compression means for compressing said dose reservoir; and (iv) a control switch operatively connected to said valve means, said biasing means, and said compression means, such that the force of actuation of said control switch by the patient overcomes said biasing means and places said valve means in said open mode of operation, the force of actuation of said control switch also causing said control switch to operatively engage said compression means to reduce the volume of said dose reservoir and express the beneficial agent out of said dose reservoir and said outlet while said valve means is in said open mode of operation; (f) wherein said apparatus may be worn by the patient and permits the patient to be ambulatory. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An apparatus for patient controlled delivery of an agent comprising:
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a dose reservoir in fluid communications with an outlet and an inlet, the dose reservoir having a maximum capacity which represents the discrete dose limit to be administered to the patient; excessive dose prevention means for supplying a predetermined flow rate of the agent to the dose reservoir such that after a predetermined fill time the dose reservoir is filled to maximum capacity; valve means having a closed mode of operation whereby the outlet is closed and an open mode of operation whereby the outlet is open, permitting flow of the beneficial agent therethrough; biasing means for biasing the valve means in the closed operating mode; dose reservoir compression means for compressing the dose reservoir; and a control switch operatively connected to the valve means, the biasing means, and the dose reservoir means such that the force of actuation of the control switch overcomes the biasing means and places the valve means in the open mode of operation, the force of actuation of the control switch also causing the control switch to operatively engage the compression means to reduce the volume of the dose reservoir and express the beneficial agent out of the dose reservoir and the outlet while the valve means is in the open mode of operation; whereby operation of the valve means prior to the fill time results in an amount of agent less than the discrete dose maximum being administered to the patient. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification