Fluid drug delivery device
First Claim
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1. A fluid drug delivery device comprising:
- (a) a portable base unit including a processing unit, and an actuator controlled by said processing unit;
(b) a cartridge removably interconnected to said base unit, said cartridge including a fluid supply assembly, a fluid outlet, and a flow control arrangement including a flow control valve, said flow control arrangement controlling flow from said fluid supply assembly to said fluid outlet, wherein said flow control arrangement further includes an elongated pressure reduction passageway; and
(c) at least one pressure sensor interconnected with a first and a second pressure sensing points, said pressure sensing points located at intervals alone said elongated passageway so as to discern a pressure differential between said first and second pressure sensing points, wherein said flow control valve is operated by force applied to at least one actuation surface provided by said cartridge, said actuation surface being isolated from contact with the fluid, at least part of said actuator being deployable in contact with said actuation surface.
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Abstract
A portable insulin delivery device that supplies insulin in a pre-pressurized chamber, passes the insulin through a pressure-dropping labyrinth to a flow control valve. The valve is activated by a piezoelectric actuator. This allows for precise insulin delivery. An electronic package provides for programming of basal rates and bolus. A pressure sensor relays data concerning normal operation and pressure changes that indicate problems. The processor, keypad, display, power source, fluid pressure sensor and fluid flow control actuator are housed in a base unit. A removable cartridge unit houses the pre-pressurized fluid reservoir, flow path labyrinth, and flow control valve.
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Citations
12 Claims
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1. A fluid drug delivery device comprising:
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(a) a portable base unit including a processing unit, and an actuator controlled by said processing unit;
(b) a cartridge removably interconnected to said base unit, said cartridge including a fluid supply assembly, a fluid outlet, and a flow control arrangement including a flow control valve, said flow control arrangement controlling flow from said fluid supply assembly to said fluid outlet, wherein said flow control arrangement further includes an elongated pressure reduction passageway; and
(c) at least one pressure sensor interconnected with a first and a second pressure sensing points, said pressure sensing points located at intervals alone said elongated passageway so as to discern a pressure differential between said first and second pressure sensing points, wherein said flow control valve is operated by force applied to at least one actuation surface provided by said cartridge, said actuation surface being isolated from contact with the fluid, at least part of said actuator being deployable in contact with said actuation surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification