Implantable medical device fixation
First Claim
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1. A method of implanting an assembly in a patient, the assembly comprising:
- an implantable medical device comprising;
a plurality of electrodes, andcircuitry configured to deliver cardiac pacing stimulation via the plurality of electrodes; and
a set of fixation tines attached to the implantable medical device such that the set of fixation tines extends from a distal end of the implantable medical device, wherein each fixation tine of the set of fixations tines comprises a super-elastic material, the method comprising;
holding, within a lumen of a delivery catheter, the implantable medical device and the set of fixation tines, wherein the lumen is sized to hold each fixation tine of the set of fixation tines in a spring-loaded position;
deploying each fixation tine of the set of fixation tines from the spring-loaded position to a hooked position, wherein each fixation tine of the set of fixation tines is configured to be deployed from the spring-loaded position to the hooked position by being released from the spring-loaded position and allowed to assume the hooked position;
penetrating, by a distal end of each fixation tine of the set of fixation tines and as a result of the deployment of the set of fixation tines, cardiac tissue;
generating, by each fixation tine of the set of fixation tines, a deployment force during the deployment; and
applying, by each fixation tine of the set of fixation tines, the deployment force to at least one of the cardiac tissue or the delivery catheter to pull the attached implantable medical device toward the cardiac tissue through an aperture at a distal end of the delivery catheter.
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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.
399 Citations
28 Claims
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1. A method of implanting an assembly in a patient, the assembly comprising:
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an implantable medical device comprising; a plurality of electrodes, and circuitry configured to deliver cardiac pacing stimulation via the plurality of electrodes; and a set of fixation tines attached to the implantable medical device such that the set of fixation tines extends from a distal end of the implantable medical device, wherein each fixation tine of the set of fixations tines comprises a super-elastic material, the method comprising; holding, within a lumen of a delivery catheter, the implantable medical device and the set of fixation tines, wherein the lumen is sized to hold each fixation tine of the set of fixation tines in a spring-loaded position; deploying each fixation tine of the set of fixation tines from the spring-loaded position to a hooked position, wherein each fixation tine of the set of fixation tines is configured to be deployed from the spring-loaded position to the hooked position by being released from the spring-loaded position and allowed to assume the hooked position; penetrating, by a distal end of each fixation tine of the set of fixation tines and as a result of the deployment of the set of fixation tines, cardiac tissue; generating, by each fixation tine of the set of fixation tines, a deployment force during the deployment; and applying, by each fixation tine of the set of fixation tines, the deployment force to at least one of the cardiac tissue or the delivery catheter to pull the attached implantable medical device toward the cardiac tissue through an aperture at a distal end of the delivery catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of implanting an assembly in a patient, the assembly comprising:
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an implantable medical device comprising; a plurality of electrodes; and circuitry configured to deliver cardiac pacing stimulation via the plurality of electrodes; and a set of fixation tines attached to the implantable medical device such that the set of fixation tines extends from a distal end of the implantable medical device, wherein each fixation tine of the set of fixations tines comprises a super-elastic material and defines an oblong cross-section, wherein the set of fixation tines are positioned substantially equidistant from each other in a circular arrangement, wherein one of the electrodes is located at the distal end of the implantable medical device generally centered within the circular arrangement, wherein the set of fixation tines extend from the implantable medical device at a longitudinal position that is proximal to the electrode, the method comprising; holding, within a lumen of a delivery catheter, the implantable medical device and the set of fixation tines, wherein the lumen is sized to hold each fixation tine of the set of fixation tines in a spring-loaded position, wherein the delivery catheter includes an aperture to the lumen that is adjacent to the distal end of the delivery catheter; deploying each fixation tine of the set of fixation tines from the spring-loaded position to a hooked position by pushing the implantable medical device towards the distal end of the delivery catheter until the distal ends of the set of fixation tines extend out of the aperture, wherein each fixation tine of the set of fixation tines is configured to be deployed from the spring-loaded position to the hooked position by being released from the spring-loaded position and allowed to assume the hooked position; penetrating, by a distal end of each fixation tine of the set of fixation tines and as a result of the deployment of the set of fixation tines, cardiac tissue; generating, by each fixation tine of the set of fixation tines, a deployment force during the deployment; and applying, by each fixation tine of the set of fixation tines, the deployment force to at least one of the cardiac tissue or the delivery catheter to pull the attached implantable medical device toward the cardiac tissue and at least partially out of the lumen through the aperture. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification