Implantable sensor for measuring physiologic information
First Claim
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1. An implantable sensor comprising:
- a piezopolymer sensor element comprising a body having a plurality of layers of a piezopolymer;
an attachment device configured to hold the piezopolymer sensor element in direct contact with at least one of a bodily fluid and bodily tissue such that the piezopolymer sensor element is configured to bend in response to motion of the at least one of bodily fluid and bodily tissue; and
a pair of electrodes attached to the piezopolymer sensor element, the electrodes configured to collect an electrical charge generated within the piezopolymer sensor element due to the bending of the piezopolymer sensor element;
wherein the attachment device comprises a cable defining an at least partially loop-shaped portion, the piezopolymer sensor element being held within an open space bounded by the loop-shaped portion.
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Abstract
An implantable sensor is provided that includes a piezopolymer sensor element including a body having a plurality of layers of a piezopolymer, and an attachment device configured to hold the piezopolymer sensor element in direct contact with at least one of a bodily fluid and bodily tissue such that the piezopolymer sensor element is configured to bend in response to motion of the at least one of bodily fluid and bodily tissue. A pair of electrodes are attached to the piezopolymer sensor element and the electrodes are configured to collect an electrical charge that is generated within the piezopolymer sensor element due to the bending of the piezopolymer sensor element.
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Citations
21 Claims
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1. An implantable sensor comprising:
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a piezopolymer sensor element comprising a body having a plurality of layers of a piezopolymer; an attachment device configured to hold the piezopolymer sensor element in direct contact with at least one of a bodily fluid and bodily tissue such that the piezopolymer sensor element is configured to bend in response to motion of the at least one of bodily fluid and bodily tissue; and a pair of electrodes attached to the piezopolymer sensor element, the electrodes configured to collect an electrical charge generated within the piezopolymer sensor element due to the bending of the piezopolymer sensor element; wherein the attachment device comprises a cable defining an at least partially loop-shaped portion, the piezopolymer sensor element being held within an open space bounded by the loop-shaped portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An implantable sensor comprising:
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a piezopolymer sensor element comprising a body having a plurality of layers of a piezopolymer; an attachment device configured to hold the piezopolymer sensor element in direct contact with at least one of a bodily fluid and bodily tissue such that the piezopolymer sensor element is configured to bend in response to motion of the at least one of bodily fluid and bodily tissue; and a pair of electrodes attached to the piezopolymer sensor element, the electrodes configured to collect an electrical charge generated within the piezopolymer sensor element due to the bending of the piezopolymer sensor element; wherein the attachment device comprises a cable defining an at least partially diamond-shaped portion, the piezopolymer sensor element being held within an open space bounded by the diamond-shaped portion. - View Dependent Claims (15)
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16. A method for measuring the motion of a heart, said method comprising:
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positioning an attachment device with a sensor element within a pericardial space of a heart such that the sensor element is in direct contact with a surface of at least one of a serous pericardium of the pericardium and a fibrous pericardium of the pericardium such that the sensor element bends in response to motion of the at least one of a serous pericardium of the pericardium and a fibrous pericardium of the pericardium, wherein the attachment device comprises a cable defining an at least partially loop-shaped portion, the piezopolymer sensor element being held within an open space bounded by the loop-shaped portion; measuring an output voltage of electrical charges generated on at least one surface of the sensor element due to the bending of the sensor element; and determining a bending moment of the sensor element based on the measured output voltage. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification