Chronically implantable medical devices configured for extraction and extraction devices for extracting chronically implanted medical devices
First Claim
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1. An implantable medical device (IMD) configured for deployment within a chamber of a patient'"'"'s heart, the chamber including a chamber wall, the IMD comprising:
- a housing configured to be positioned within the chamber of the patient'"'"'s heart proximate the chamber wall once the IMD is implanted, the housing extending from a distal end to a proximal end;
a power source disposed within the housing;
circuitry disposed within the housing and operatively coupled to the power source;
an electrode fixed relative to the housing and positioned to contact the chamber wall once the IMD is implanted, the circuitry configured to pace the patient'"'"'s heart via the electrode;
a fixation element for extending into the chamber wall at the implantation site to fix the IMD relative to the chamber wall at the implantation site, the fixation element disposed at or near the distal end of the housing;
a retrieval feature for retrieving the IMD after implantation, the retrieval feature disposed at or near the proximal end of the housing; and
the retrieval feature including an ablating region that is operatively coupled to the circuitry, wherein the circuitry is configured to selectively provide sufficient energy from the power source to the ablating region to cause tissue proximate the retrieval feature to ablate and to expose the IMD to a surrounding blood pool.
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Abstract
Extraction devices for extracting chronically implanted devices such as leadless cardiac pacemakers (LCP). In some cases, the extraction devices may be configured to cut, tear or ablate through at least some of the tissue ingrowth around and/or over the chronically implanted device such that a retrieval feature on the chronically implanted device may be grasped for removal of the chronically implanted device. Implantable medical devices such as LCPs may include features that facilitate their removal.
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Citations
17 Claims
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1. An implantable medical device (IMD) configured for deployment within a chamber of a patient'"'"'s heart, the chamber including a chamber wall, the IMD comprising:
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a housing configured to be positioned within the chamber of the patient'"'"'s heart proximate the chamber wall once the IMD is implanted, the housing extending from a distal end to a proximal end; a power source disposed within the housing; circuitry disposed within the housing and operatively coupled to the power source; an electrode fixed relative to the housing and positioned to contact the chamber wall once the IMD is implanted, the circuitry configured to pace the patient'"'"'s heart via the electrode; a fixation element for extending into the chamber wall at the implantation site to fix the IMD relative to the chamber wall at the implantation site, the fixation element disposed at or near the distal end of the housing; a retrieval feature for retrieving the IMD after implantation, the retrieval feature disposed at or near the proximal end of the housing; and the retrieval feature including an ablating region that is operatively coupled to the circuitry, wherein the circuitry is configured to selectively provide sufficient energy from the power source to the ablating region to cause tissue proximate the retrieval feature to ablate and to expose the IMD to a surrounding blood pool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable medical device (IMD) configured for deployment within a patient, the IMD comprising:
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a housing configured to be implantable within the patient at an implantation site; a fixation element for fixing the IMD to the patient at the implantation site; a retrieval feature secured relative to the housing for facilitating retrieval of the IMD from the implantation site; and an extraction element secured relative to the housing, the extraction element configured to expose at least part of the retrieval feature from tissue overgrowth by ablating at least some of the tissue overgrowth. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An implantable medical device (IMD) configured for deployment within a patient, the IMD comprising:
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a housing configured to be implantable within the patient at an implantation site; a fixation element for fixing the IMD to the patient at the implantation site; a retrieval feature secured relative to the housing for facilitating retrieval of the IMD from the implantation site; and an extraction element secured relative to the housing, the extraction element comprising an energy-absorbable material that can be sufficiently heated by an incident energy beam emanating from exterior to the patient to ablate or cut tissue overgrowth adjacent the extraction element.
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Specification