Externally releasable body portal anchors and systems
First Claim
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1. An anchor assembly for securing a device relative to a skin-covered portal, the anchor assembly comprising:
- a retainer positionable in or near the portal and beneath the skin, the retainer comprising;
a body portion including a peripheral edge and a first retaining surface; and
an arm attached to the body portion, the arm comprising a second retaining surface movable, relative to the first retaining surface, between a first position and a second position; and
a lock member comprising an elongate cord removably coupled to the body portion, the lock member movable from an engaged state in which the lock member holds the arm in the second position, to a disengaged state in which the lock member releases the arm from the second position, wherein the lock member is movable from the engaged state to the disengaged state via manipulation of the lock member from outside the skin.
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Abstract
Embodiments of the present invention include anchor assemblies and methods for using the same to immobilize a device within a body portal. In one embodiment, the anchor assembly is utilized to immobilize a catheter relative to a covered (e.g., skin-covered) burr hole formed in a skull. Anchor assemblies in accordance with embodiments of the present invention may include anchors located subdermally that may be unlocked from outside the body to release the device without a surgical procedure.
85 Citations
25 Claims
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1. An anchor assembly for securing a device relative to a skin-covered portal, the anchor assembly comprising:
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a retainer positionable in or near the portal and beneath the skin, the retainer comprising; a body portion including a peripheral edge and a first retaining surface; and an arm attached to the body portion, the arm comprising a second retaining surface movable, relative to the first retaining surface, between a first position and a second position; and a lock member comprising an elongate cord removably coupled to the body portion, the lock member movable from an engaged state in which the lock member holds the arm in the second position, to a disengaged state in which the lock member releases the arm from the second position, wherein the lock member is movable from the engaged state to the disengaged state via manipulation of the lock member from outside the skin. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An anchor assembly for securing a therapy delivery device relative to a burr hole, the anchor assembly comprising:
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an anchor comprising; a base comprising a peripheral portion defining a central opening; and a retainer attachable to the base in or near the central opening, the retainer comprising; a body portion defining a mounting plane, the body portion comprising a peripheral edge and a first retaining surface formed by an edge of an opening extending through the peripheral edge; and an arm movably attached to the body portion, the arm comprising a second retaining surface movable, relative to the first retaining surface, between a first position and a second position; and a lock member comprising an elongate cord detachably received within an opening formed in the body portion of the retainer such that the lock member protrudes outwardly in a direction generally orthogonally from the mounting plane of the body portion. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An anchor assembly for securing a therapy delivery device relative to a burr hole, the anchor assembly comprising:
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an anchor comprising; a base including a peripheral portion defining a central opening, the peripheral portion comprising a ledge formed by a plurality of teeth extending into the central opening; a retainer positionable on the ledge, the retainer comprising; a body portion defining a mounting plane, the body portion having a peripheral edge and a first retaining surface formed by an edge of an opening extending through the peripheral edge, the first retaining surface spanning from an interior of the body portion to a location at or near the peripheral edge; an arm pivotally attached to the body portion, the arm comprising a second retaining surface movable, relative to the first retaining surface, between a first position in which the second retaining surface is oblique to the first retaining surface, and a second position in which the first and second retaining surfaces are generally parallel; and a latch comprising a latch plunger biased towards a latched position beyond the peripheral edge of the body portion; and a lock member comprising a first end insertable into a lock opening in the body portion such that the lock member protrudes away from the body portion and outwardly in a direction generally orthogonal to the mounting plane. - View Dependent Claims (22)
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23. A method for removing a partially implanted device extending through a skin-covered burr hole, the method comprising:
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securing the device relative to the burr hole with an anchor assembly, the anchor assembly comprising a subdermal anchor fixed relative to bone surrounding the burr hole, wherein the device protrudes outwardly through skin; releasing the device from the anchor by manipulation of the anchor assembly while the anchor is covered by the skin, wherein releasing the device comprises applying a release force to a release cord attached to the anchor, the release cord protruding outwardly through the skin; and applying a force to a portion of the device that protrudes outside the skin to remove the device. - View Dependent Claims (24)
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25. A method for removing a partially implanted device extending through a skin-covered burr hole, the method comprising:
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securing the device relative to the burr hole with an anchor assembly, the anchor assembly comprising a subdermal anchor fixed relative to bone surrounding the burr hole, wherein the device protrudes outwardly through skin; releasing the device from the anchor by manipulation of the anchor assembly from outside the skin, wherein releasing the device comprises applying a release force to a release cord attached to the anchor, the release cord protruding outwardly through the skin; and applying a force to a portion of the device that protrudes outside the skin to remove the device.
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Specification