Medical device anchoring apparatus and methods

摘要

Methods and apparatus for anchoring an elongate medical device within a body portal, for example, a stimulation lead in a cranial burr hole, employ a securing element attached to a plate member, which may be held over a body portal by a base ring. The securing element includes a spring member and an engagement surface; a retaining member holds the engagement surface, spaced apart from a side of a slot of the plate member, in an open position, against a bias of the spring member. In the open position, the device may be received between the engagement surface and the side of the slot, through an opening of the slot. Disengaging the retaining member releases a moveable portion of the spring member to move the engagement surface toward the side of the slot and into a closed position, at which the inserted device is anchored. The anchored device may be routed through one of a plurality of base ring channels.

主权项

1. An anchoring assembly for an elongate medical device, the assembly comprising:
a plate member generally defining a plane and including a slot that extends generally along the plane, the slot including a first side, a second side, opposite the first side, and an opening located at a perimeter of the plate member, from which the first and second sides extend; a securing element attached to the plate member and overlaying a surface of the plate member, the surface being substantially parallel to the defined plane of the plate member, the securing element including an engagement surface and a spring member, the spring member including a first portion fixed to the plate member, and a second, moveable portion coupled to the engagement surface to move the engagement surface, relative to the plate member, between an open position and a closed position, the engagement surface being spaced apart from the first side of the slot by a first distance in the open position, and being spaced apart from the first side of the slot by a second distance in the closed position, the first distance allowing insertion of the elongate medical device through the opening of the slot and between the engagement surface and the first side of the slot, and the second distance being less than the first distance at which the engagement surface anchors the inserted device; and a retaining member comprising a first pin member configured to engage and disengage with the securing element, and a second pin member configured to engage and disengage with the plate member; wherein the retaining member, when engaged with the securing element, holds the moveable portion of the spring member against a bias of the spring member, to keep the engagement surface of the securing element in the open position; and when the retaining member is disengaged from the securing element, the moveable portion of the spring member is released to move the engagement surface to the closed position.