Medication delivery pump for redundant staggered glucose sensor insulin dosage system
AssigneeWillow Laboratories, Inc.
InventorsHung The Vo, Sai Kong Frank Lee, Richard Velasco, Tran Minh Tuan
Life of this patent
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Abstract
A disease management system including a medication delivery pump configured to deliver a medication from a medication pouch to a patient. The medication delivery pump may include one or more plungers configured to interrupt a flow path of medication from a medication reservoir to a patient, one or more muscle wires, and one or more disc shaped springs. The one or more muscle wires and disc shaped springs may be configured to move the one or more plungers to interrupt and uninterrupt the flow path of medication towards a patient from a medication pouch.
Claims19
A method to pump liquid medication from a liquid medication reservoir to a patient through a cannula or needle inserted into a patient, the method comprising:
- contracting one or more of a plurality of plungers from an uncontracted position to cause a negative pressure to draw medication into a flow path from the liquid medication reservoir, wherein an output of a first plunger of the plurality of plungers is in fluid communication with an input of a second plunger of the plurality of plungers;
- and
- retracting the one or more of a plurality of plungers to the uncontracted position by applying a retraction force, wherein the retraction force causes a positive pressure to the medication in the flow path to move medication downstream within the flow path.
A method to engage a system of plungers configured to pump liquid medication through a flow path from a medication reservoir to a patient to a cannula or needle inserted into a patient, the method comprising:
- applying a first electrical signal to a first wire and a second electrical signal to a second wire to cause the first wire to contract a first plunger, applying a negative pressure within the flow path in a first portion, and to contract a second plunger to apply a negative pressure within the flow path in a second portion substantially simultaneously to cause flow of the liquid medication, wherein an output of the first portion is in fluid communication with an input of the second portion;
- ceasing applying the electrical signal to the first wire in order to allow application of retraction pressure to the first plunger such that the first plunger is retracted to an uncontracted position to apply a positive pressure in the first portion;
- applying a third electrical signal to a third wire to contract a third plunger, applying a positive pressure within the flow path in a third portion, wherein an output of the second portion is in fluid communication with an input of the third portion;
- and
- ceasing applying the electrical signal to the second wire substantially simultaneously to applying the third electrical signal, application of retraction pressure to the second plunger such that the second plunger is retracted to an uncontracted position and to apply a negative pressure within the flow path in the second portion.
A muscle wire pump system configured to manage a liquid medication flow path from a medication reservoir to a patient through a cannula or needle inserted into a patient, the system comprising:
- a controller configured to control operation of a pump by operating a plurality of plungers within the liquid medication flow path, wherein an output of a first plunger of the plurality of plungers is in fluid communication with an input of a second plunger of the plurality of plungers;
- a plurality of muscle wires each coupled to one of the plurality of plungers, each of the plurality of muscle wires configured to receive an electrical signal and cause contraction of the corresponding plunger, thereby creating a negative pressure to draw medication along the flow path;
- and
- a plurality of means for opposing contraction of the plurality of muscle wires, each of the plurality of means for opposing contraction configured to return one of the plurality of plungers to an uncontracted position upon cessation of the electrical signal to the muscle wire coupled to the plunger.
Dependencies are inferred from the claim text.