Passive flow control devices for implantable pumps
First Claim
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1. A method of controlling flow in an implantable drug delivery device comprising the steps of:
- a) providing a bi-stable flow control element;
b) providing a control module for generating a signal to the flow control element;
c) duty cycling the flow control element to obtain a desired average flow rate over time;
d) providing a bolus delivery component in parallel communication with the flow control element; and
e) controlling operation of the bolus delivery component to permit accumulation of a predetermined amount of drug bolus in the bolus delivery device and subsequent release of the accumulated bolus.
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Accused Products
Abstract
An implantable drug delivery device is provided with a passive flow control device is provided in the form of a valve which may assume two flow states. Flow control is achieved by duty cycling the valve using a control module which generates appropriate signals in response to an input telemetry signal corresponding to a desired flow rate. In another embodiment, a passively controlled bolus delivery device is provided to deliver a bolus of drug in addition to normal dosage.
70 Citations
1 Claim
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1. A method of controlling flow in an implantable drug delivery device comprising the steps of:
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a) providing a bi-stable flow control element;
b) providing a control module for generating a signal to the flow control element;
c) duty cycling the flow control element to obtain a desired average flow rate over time;
d) providing a bolus delivery component in parallel communication with the flow control element; and
e) controlling operation of the bolus delivery component to permit accumulation of a predetermined amount of drug bolus in the bolus delivery device and subsequent release of the accumulated bolus.
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Specification
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Current AssigneeMedtronic Incorporated (Medtronic Plc)
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Original AssigneeMedtronic Incorporated (Medtronic Plc)
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InventorsRogers, Charles, McMullen, Raymond, Starkebaum, Warren
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Primary Examiner(s)Casler, Brian L.
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Assistant Examiner(s)Sirmons, Kevin C.
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Application NumberUS09/303,004Time in Patent Office1,278 DaysField of Search604/890--89, 604/93, 604/131, 604/151, 604/156, 604/246-249US Class Current604/151CPC Class CodesA61M 2205/0244 Micromachined materials, e....A61M 5/141 with capillaries for restri...A61M 5/14276 specially adapted for impla...A61M 5/16813 by controlling the degree o...
