Sheath assembly for an access device and method therefor
First Claim
Patent Images
1. A sheath assembly for a deep brain access device, the sheath assembly comprising:
- at least one sheath configured to be guided to a target location using the access device, the sheath including;
a first sheath portion; and
a separate second sheath portion, the first and second sheath portions coupled to a handle at one end and rotatable with respect to each other such that, when the handle is rotated into a first position the first and second sheath portions together define a central lumen, and when the handle is rotated to a second position, a longitudinal sheath opening is exposed;
wherein the central lumen is sized and shaped to accept at least a portion of an electrode therein, the central lumen configured to guide the electrode to the target location, and wherein the longitudinal sheath opening is selectively openable and configured to allow at least the portion of the electrode to pass therethrough; and
a securing base configured to secure the electrode during removal of the at least one sheath.
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Accused Products
Abstract
Devices and methods provide accurate targeting, placement, and/or stabilization of an electrode or other instrument(s) into the brain or other body organ, such as to treat severe tremor or other neurological disorders. Targeting is performed using any form of image-guidance, including real-time MRI, CT, or frameless surgical navigation systems.
329 Citations
30 Claims
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1. A sheath assembly for a deep brain access device, the sheath assembly comprising:
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at least one sheath configured to be guided to a target location using the access device, the sheath including; a first sheath portion; and a separate second sheath portion, the first and second sheath portions coupled to a handle at one end and rotatable with respect to each other such that, when the handle is rotated into a first position the first and second sheath portions together define a central lumen, and when the handle is rotated to a second position, a longitudinal sheath opening is exposed; wherein the central lumen is sized and shaped to accept at least a portion of an electrode therein, the central lumen configured to guide the electrode to the target location, and wherein the longitudinal sheath opening is selectively openable and configured to allow at least the portion of the electrode to pass therethrough; and a securing base configured to secure the electrode during removal of the at least one sheath. - View Dependent Claims (2, 3, 4)
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5. A sheath assembly for a deep brain access device, the sheath assembly comprising:
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a primary guide assembly cooperating with the access device and defining at least one lumen having an insertion axis; and at least one sheath configured to be inserted through the at least one lumen of the primary guide assembly and guided to a target location, the at least one sheath defining a center passage sized and shaped to accept at least a portion of an electrode therein, the center passage configured to guide the electrode to the target location, the at least one sheath including at least two portions arranged to be selectively separated and peeled-away from each other to define an opening in the sheath, the opening being selectively openable and configured to allow at least the portion of the electrode to pass therethrough; wherein the primary guide assembly includes transverse grooves extending laterally in opposite directions from the at least one lumen, the transverse grooves each arranged to hold one of the at least two peel-away portions of the at least one sheath. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method, comprising:
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providing an adjustable trajectory access device having a primary guide assembly that defines a lumen having an insertion axis; providing a sheath assembly; guiding the sheath assembly through the lumen to a target location using the adjustable trajectory access device, the sheath assembly defining at least one center passage sized and shaped to accept at least a portion of an electrode therein; separating the sheath assembly into at least two portions, the at least two portions defining an opening in the sheath assembly; positioning the at least two separated portions into transverse grooves disposed in the primary guide assembly and extending laterally in opposite directions from the lumen; and removing at least the portion of the electrode from the at least one center passage. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A sheath assembly for a deep brain access device, the sheath assembly comprising:
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three sheathes linearly arranged and configured to be guided to a target location using the access device, each sheath of the three sheathes defining a center passage sized and shaped to accept at least a portion of an electrode therein, the center passage configured to guide the electrode to the target location, each sheath having at least two portions configured to be selectively separated to open at least one opening in the sheath, the opening being configured to allow at least the portion of the electrode to pass therethrough; and a stylet having a wedge disposed on a proximal portion of the stylet, the proximal portion including a handle abutting the wedge, wherein the wedge is disposed so as to be symmetrically positioned about a longitudinal axis of the stylet, the wedge being configured to assist in separating the portions of each sheath. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A sheath assembly for a deep brain access device, the sheath assembly comprising:
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three sheathes configured to be guided to a target location using the access device, each sheath of the three sheathes including; a first sheath portion; and a separate second sheath portion, the first and second sheath portions of each of the three sheathes coupled to a handle at one end and rotatable with respect to each other such that, when the handle is rotated into a first position the first and second sheath portions of each of the three sheathes together define a central lumen, and when the handle is rotated to a second position, a longitudinal sheath opening is exposed; wherein the central lumen is sized and shaped to accept at least a portion of an electrode therein, the central lumen configured to guide the electrode to the target location, and wherein the longitudinal sheath opening is selectively openable and configured to allow at least the portion of the electrode to pass therethrough; and a stylet assembly including a handle portion and at least three stylets extending therefrom, the at least three stylets configured to be received in the at least three sheathes.
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Specification