Accumulator for implantable infusion device
First Claim
1. An implantable infusion device (IID) comprising:
- a reservoir configured to store a therapeutic agent;
a fluid delivery pump configured to receive the therapeutic agent from the reservoir and deliver the therapeutic agent through an outlet of the fluid delivery pump into a flow path; and
an accumulator arranged at the outlet of the fluid delivery pump, the accumulator comprising;
a cover; and
a diaphragm biased away from the cover and configured to deflect toward the cover under pressure generated by the therapeutic agent in the flow path of the IID,wherein the cover is configured to withstand the pressure generated by the therapeutic agent in the flow path without appreciably deforming.
1 Assignment
0 Petitions
Accused Products
Abstract
An accumulator is employed in an implantable infusion device to provide compliance in the flow path of the device. The accumulator may act to increase the pumping accuracy and repeatability while simultaneously reducing the energy requirements of the device. In one example, the accumulator is arranged at the outlet of a fluid delivery pump of the infusion device. The accumulator includes a cover and a diaphragm biased away from the cover and configured to deflect toward the cover under pressure generated by the therapeutic agent in a flow path of the infusion device. The cover of the accumulator is configured to withstand the pressure generated by the therapeutic agent in the flow path without deforming.
16 Citations
31 Claims
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1. An implantable infusion device (IID) comprising:
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a reservoir configured to store a therapeutic agent; a fluid delivery pump configured to receive the therapeutic agent from the reservoir and deliver the therapeutic agent through an outlet of the fluid delivery pump into a flow path; and an accumulator arranged at the outlet of the fluid delivery pump, the accumulator comprising; a cover; and a diaphragm biased away from the cover and configured to deflect toward the cover under pressure generated by the therapeutic agent in the flow path of the IID, wherein the cover is configured to withstand the pressure generated by the therapeutic agent in the flow path without appreciably deforming. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A fluid delivery pump for an implantable infusion device (IID), the fluid delivery pump comprising:
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an inlet configured to be fluidically connected to a source of a therapeutic agent; an outlet configured to be fluidically connected to a catheter; a pumping mechanism configured to receive the therapeutic agent from the source through the inlet and deliver the therapeutic agent through a flow path from the outlet into and through the catheter; and an accumulator arranged at the outlet, the accumulator comprising; a cover; and a diaphragm biased away from the cover and configured to deflect toward the cover under pressure generated by the therapeutic agent in the flow path of the IID, wherein the cover is configured to withstand the pressure generated by the therapeutic agent in the flow path without appreciably deforming. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A system comprising:
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an implantable infusion device (IID); and a catheter connected to the IID, wherein the IID comprises; a reservoir configured to store a therapeutic agent; a fluid delivery pump configured to receive the therapeutic agent from the reservoir and deliver the therapeutic agent through a flow path from an outlet of the fluid delivery pump into and through the catheter; and an accumulator arranged at the outlet of the fluid delivery pump, the accumulator comprising; a cover; and a diaphragm biased away from the cover and configured to deflect toward the cover under pressure generated by the therapeutic agent in the flow path of the IID, wherein the cover is configured to withstand the pressure generated by the therapeutic agent in the flow path without appreciably deforming.
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Specification