Implantable medical device fixation
First Claim
Patent Images
1. An implantable medical device comprising:
- at least one housing;
a plurality of electrodes;
pacing circuitry within the at least one housing, the pacing circuitry configured to deliver cardiac pacing via the electrodes;
a power source with the at least one housing, the power source configured to power the pacing circuitry;
a fixation assembly comprising;
a fixation assembly housing fixedly connected to the at least one housing proximate a distal end of the at least one housing; and
a fixation element comprising a proximal base within the fixation assembly housing and a set of fixation tines extending distally from the proximal base and out of the fixation assembly housing, wherein each fixation tine in the set comprises a shape memory alloy material and is deployable by bending from a spring-loaded position in which a distal end of the fixation tine points away from the at least one housing to a hooked position in which the fixation tine bends back towards the at least one housing, wherein the set of fixation tines is configured to secure the implantable medical device to patient tissue when deployed while distal ends of the fixation tines are positioned adjacent to the patient tissue.
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Abstract
Various fixation techniques for implantable medical device (IMDs) are described. In one example, an assembly comprises an IMD; and a set of active fixation tines attached to the IMD. The active fixation tines in the set are deployable from a spring-loaded position in which distal ends of the active fixation tines point away from the IMD to a hooked position in which the active fixation tines bend back towards the IMD. The active fixation tines are configured to secure the IMD to a patient tissue when deployed while the distal ends of the active fixation tines are positioned adjacent to the patient tissue.
386 Citations
20 Claims
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1. An implantable medical device comprising:
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at least one housing; a plurality of electrodes; pacing circuitry within the at least one housing, the pacing circuitry configured to deliver cardiac pacing via the electrodes; a power source with the at least one housing, the power source configured to power the pacing circuitry; a fixation assembly comprising; a fixation assembly housing fixedly connected to the at least one housing proximate a distal end of the at least one housing; and a fixation element comprising a proximal base within the fixation assembly housing and a set of fixation tines extending distally from the proximal base and out of the fixation assembly housing, wherein each fixation tine in the set comprises a shape memory alloy material and is deployable by bending from a spring-loaded position in which a distal end of the fixation tine points away from the at least one housing to a hooked position in which the fixation tine bends back towards the at least one housing, wherein the set of fixation tines is configured to secure the implantable medical device to patient tissue when deployed while distal ends of the fixation tines are positioned adjacent to the patient tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A kit comprising:
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a catheter forming a lumen that includes an aperture to the lumen that is adjacent to the distal end of the catheter; and an implantable medical device that includes; at least one housing; a plurality of electrodes; pacing circuitry within the at least one housing, the pacing circuitry configured to deliver cardiac pacing via the electrodes; a power source with the at least one housing, the power source configured to power the pacing circuitry; a fixation assembly comprising; a fixation assembly housing fixedly connected to the at least one housing proximate a distal end of the at least one housing; and a fixation element comprising a proximal base within the fixation assembly housing and a set of fixation tines extending distally from the proximal base and out of the fixation assembly housing, wherein each fixation tine in the set comprises a shape memory alloy material and is deployable by bending from a spring-loaded position in which a distal end of the fixation tine points away from the at least one housing to a hooked position in which the fixation tine bends back towards the at least one housing, wherein the set of fixation tines is configured to secure the implantable medical device to patient tissue when deployed while distal ends of the fixation tines are positioned adjacent to the patient tissue, wherein the lumen of the catheter is sized to receive the implantable medical device and hold the set of fixation tines in the spring-loaded position, and wherein the set of fixation tines are configured to be deployed by pushing the implantable medical device towards the distal end of the catheter until the distal ends of the set of fixation tines extend out of the aperture. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An implantable medical device comprising:
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at least one housing; a plurality of electrodes; pacing circuitry within the at least one housing, the pacing circuitry configured to deliver cardiac pacing via the electrodes; a power source with the at least one housing, the power source configured to power the pacing circuitry; a fixation assembly comprising; a fixation assembly housing fixedly connected to the at least one housing proximate a distal end of the at least one housing; and a fixation element comprising a proximal base within the fixation assembly housing and a set of fixation tines extending distally from the proximal base and out of the fixation assembly housing, wherein each fixation tine in the set comprises a shape memory alloy material and is deployable by bending from a spring-loaded position in which a distal end of the fixation tine points away from the at least one housing to a hooked position in which the fixation tine bends back towards the at least one housing, wherein the set of fixation tines are in a circular arrangement about the proximal base with proximal ends of the fixation tines secured to the proximal base, the set of fixation tines are positioned substantially equidistant from each other in the circular arrangement, and the set of fixation tines are oriented radially outwardly relative to the circular arrangement in the hooked position, wherein the set of fixation tines is configured to secure the implantable medical device to patient tissue when deployed while distal ends of the fixation tines are positioned adjacent to the patient tissue, wherein one electrode of the plurality of electrodes is located within the circular arrangement and the implantable medical device is configured such that the one electrode contacts the patient tissue when the implantable medical device is secured to the patient tissue by the set of fixation tines, wherein the implantable medical device further comprises at least one conductor configured to couple the one electrode to the pacing circuitry, wherein the at least one conductor extends from the at least one housing, through the fixation assembly, and to the electrode, and wherein the fixation assembly housing electrically isolates the set of fixation tines from the at least one conductor.
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Specification