Dual drug delivery device
First Claim
1. A liquid delivery apparatus comprising a liquid delivery pathway, the liquid delivery pathway comprising:
- a liquid reservoir comprising a deformable balloon and a pressure source selected from the group consisting of a compressive sleeve spring and an electrolytic fluid cell, the deformable balloon having an interior volume and at least one deformable interior wall in the interior volume, the at least one deformable interior wall defining a plurality of reservoir chambers in the interior volume;
a liquid metering unit fluidly connected to one of the reservoir chambers; and
,a catheter delivery tube fluidly connected to the liquid metering unit.
2 Assignments
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Accused Products
Abstract
A liquid delivery apparatus for the intrathecal delivery of one or more medications to a patient is disclosed. The liquid delivery apparatus generally includes a liquid reservoir, a liquid metering unit fluidly connected to the liquid reservoir, and a catheter delivery tube fluidly connected to the liquid metering unit. Preferably, the liquid delivery apparatus includes two or more liquid reservoirs. In various embodiments, the liquid reservoir includes a deformable balloon and a compressive sleeve spring as a pressure source, the liquid metering unit is a piezoelectrically actuated microvalve, and/or diagnostic sensors are included in the apparatus. The disclosed apparatus are compact, volume-efficient, energy-efficient, capable of delivering accurate fluid volumes, and address problems associated with multi-medication therapies. Methods of operating the liquid delivery apparatus are also disclosed.
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Citations
20 Claims
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1. A liquid delivery apparatus comprising a liquid delivery pathway, the liquid delivery pathway comprising:
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a liquid reservoir comprising a deformable balloon and a pressure source selected from the group consisting of a compressive sleeve spring and an electrolytic fluid cell, the deformable balloon having an interior volume and at least one deformable interior wall in the interior volume, the at least one deformable interior wall defining a plurality of reservoir chambers in the interior volume; a liquid metering unit fluidly connected to one of the reservoir chambers; and
,a catheter delivery tube fluidly connected to the liquid metering unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A liquid delivery apparatus comprising:
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a deformable balloon having an interior volume and at least one deformable interior wall in the interior volume, the at least one deformable interior wall defining a plurality of reservoir chambers in the interior volume; and a plurality of liquid delivery pathways, each liquid delivery pathway comprising; a liquid reservoir corresponding to one of the plurality of reservoir chambers; a piezoelectrically actuated microvalve fluidly connected to the liquid reservoir; and
,a catheter delivery tube fluidly connected to the piezoelectrically actuated microvalve. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A liquid delivery apparatus comprising a liquid delivery pathway and a sensor selected from the group consisting of a flow meter fluidly connected to the liquid delivery pathway, an accelerometer, and combinations thereof;
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wherein the liquid delivery pathway comprises; a liquid reservoir comprising a deformable balloon having an interior volume and at least one deformable interior wall in the interior volume, the at least one deformable interior wall defining a plurality of reservoir chambers in the interior volume; a liquid metering unit fluidly connected to one of the reservoir chambers; and
,a catheter delivery tube fluidly connected to the liquid metering unit. - View Dependent Claims (17)
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18. A liquid delivery apparatus comprising:
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a liquid reservoir comprising a deformable balloon having an interior volume and at least one deformable interior wall in the interior volume, the at least one deformable interior wall defining a plurality of reservoir chambers in the interior volume; a plurality of liquid metering units, each of which is fluidly connected to one of the reservoir chambers; a means for measuring the volume of the liquid in the reservoir chamber; and
,a plurality of catheter delivery tubes, each of which is fluidly connected to one of the liquid metering units. - View Dependent Claims (19, 20)
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Specification