Implantable medical pump with pressure sensor
First Claim
1. An implantable medical device (IMD) comprising:
- one or more electrical components within the IMD;
a fluid enclosure wall partially defining a fluid enclosure and defining an opening, wherein the fluid enclosure is configured to accommodate a fluid; and
a pressure sensor comprising an operative surface configured to mate to the fluid enclosure wall, the operative surface occluding the opening to partially define the fluid enclosure and separate the fluid from the one or more electrical components, wherein the one or more electrical components are configured to detect, based on a signal from the pressure sensor, a blockage to delivering the fluid from the IMD to a patient.
1 Assignment
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Accused Products
Abstract
The disclosure is directed to a pressure sensor of an implantable medical device. The pressure sensor may utilize detect fluid pressure based on a changing capacitance between two capacitive elements. The pressure sensor may define at least a portion of a fluid enclosure of the IMD. In one example, the pressure sensor has a self-aligning housing shape that occludes an opening in the pump bulkhead of the IMD. An operative surface of the pressure and the portion of the fluid enclosure may be formed of a corrosion resistant and/or biocompatible material. A first capacitive element of the pressure sensor may be a metal alloy diaphragm that deflects in response to external fluid pressure. A second capacitive element of the pressure sensor may be a metal coating on a rigid insulator sealed from the fluid by the diaphragm and a housing of the sensor.
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Citations
20 Claims
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1. An implantable medical device (IMD) comprising:
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one or more electrical components within the IMD; a fluid enclosure wall partially defining a fluid enclosure and defining an opening, wherein the fluid enclosure is configured to accommodate a fluid; and a pressure sensor comprising an operative surface configured to mate to the fluid enclosure wall, the operative surface occluding the opening to partially define the fluid enclosure and separate the fluid from the one or more electrical components, wherein the one or more electrical components are configured to detect, based on a signal from the pressure sensor, a blockage to delivering the fluid from the IMD to a patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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controlling a pump of an implantable medical device (IMD) to deliver a fluid out of the IMD, wherein the IMD comprises; one or more electrical components within the IMD; a fluid enclosure wall partially defining a fluid enclosure and defining an opening, wherein the fluid enclosure is configured to accommodate the fluid; and a pressure sensor comprising an operative surface configured to mate to the fluid enclosure wall, the operative surface occluding the opening to partially define the fluid enclosure and separate the fluid from the one or more electrical components; and detecting, with the one or more electrical components and based on a signal from the pressure sensor, a blockage to delivering the fluid from the IMD to a patient. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A system comprising:
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a catheter configured to deliver a fluid to a patient; and an implantable medical device (IMD) configured to connect with the catheter and deliver the fluid to the patient via the catheter, wherein the IMD comprises; one or more electrical components within the IMD; a fluid enclosure wall partially defining a fluid enclosure and defining an opening, wherein the fluid enclosure is configured to accommodate the fluid; and a pressure sensor comprising an operative surface configured to mate to the fluid enclosure wall, the operative surface occluding the opening to partially define the fluid enclosure and separate the fluid from the one or more electrical components, wherein the one or more electrical components are configured to detect, based on a signal from the pressure sensor, a blockage to delivering the fluid from the IMD to the patient.
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Specification