ELECTROLYTICALLY DRIVEN DRUG PUMP DEVICES
First Claim
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1. A drug pump device comprising:
- a vial comprising a drug reservoir therein, the drug reservoir being fluidically connectable to a cannula for conducting liquid from the reservoir;
an electrolytically driven piston, movable within the vial, for forcing liquid from the reservoir into the cannula, a first side of the piston facing the drug reservoir; and
an electrolysis pump comprising an electrolysis chamber in contact with a second side of the piston and, contained within the chamber, at least one coaxial electrode pair in contact with electrolyte absorbed within a matrix.
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Accused Products
Abstract
Electrolytically driven drug pump devices may be configured so as to ensure sustained contact of the electrolysis electrodes with the electrolyte, thereby improving the reliability and/or pump capacity of the devices.
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Citations
42 Claims
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1. A drug pump device comprising:
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a vial comprising a drug reservoir therein, the drug reservoir being fluidically connectable to a cannula for conducting liquid from the reservoir; an electrolytically driven piston, movable within the vial, for forcing liquid from the reservoir into the cannula, a first side of the piston facing the drug reservoir; and an electrolysis pump comprising an electrolysis chamber in contact with a second side of the piston and, contained within the chamber, at least one coaxial electrode pair in contact with electrolyte absorbed within a matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A drug pump device comprising:
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a vial comprising a drug reservoir therein, the drug reservoir being fluidically connectable to a cannula for conducting liquid from the reservoir; an electrolytically driven piston, movable within the vial, for forcing liquid from the reservoir into the cannula, a first side of the piston facing the drug reservoir; and an electrolysis pump comprising (i) an electrolysis chamber in contact with a second side of the piston, and (ii) cathode and anode structures arranged to remain at least partially submerged in liquid electrolyte partially filling the chamber notwithstanding variations in orientation of the device. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. The device of claim 121, wherein the vial is formed from a conventional drug vial.
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34. A drug pump device comprising:
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a vial comprising a drug reservoir therein, the drug reservoir being fluidically connectable to a cannula for conducting liquid from the reservoir; an electrolytically driven piston, movable within the vial, for forcing liquid from the reservoir into the cannula, a first side of the piston facing the drug reservoir; and an electrolysis pump comprising an electrolysis chamber and a gas-permeable separator partitioning the chamber into first and second compartments, the first compartment containing a pair of electrodes immersed in electrolyte, and the second compartment being in contact with a second side of the piston. - View Dependent Claims (35, 36)
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37. A drug pump device comprising:
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a refillable drug reservoir; an electrolytically driven displaceable member for forcing liquid from the reservoir, a first side of the displaceable member facing the drug reservoir; and an electrolysis pump comprising an electrolysis chamber in contact with a second side of the displaceable member, and, contained within the chamber, electrodes in contact with liquid electrolyte absorbed within a matrix that substantially does not expand during electrolysis. - View Dependent Claims (38, 39, 40, 41, 42)
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Specification