Target depth locators for trajectory guide for introducing an instrument
First Claim
Patent Images
1. An apparatus comprising:
- a mounting base, configured to be locally secured relative to an entry portal in a surface;
a trajectory guide assembly, adjustably coupled to the mounting base, the trajectory guide assembly including at least one adjustably orientable instrument guide structure to establish a trajectory for an instrument to be introduced through the entry portal in the surface;
first and second imagable locators, coupled to the trajectory guide assembly at respective different first and second positions that are located away from the trajectory, the first and second imagable locators defining a first line therebetween that intersects the trajectory; and
wherein the first and second imagable locators are each adjustably coupled to the trajectory guide assembly such that each of the first and second imagable locators are moveable to adjust the first line to substantially orthogonally intersect the trajectory at different points along the trajectory.
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Abstract
This document discusses, among other things, examples of a stereotactic apparatus that includes reticles or other imagable locators for confirming placement of an instrument introduced along a desired trajectory. In certain examples, the reticles are re-positionable with respect to the trajectory to permit placement confirmation along different views. In other examples, the reticles are positionable toward or away from a skull.
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Citations
31 Claims
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1. An apparatus comprising:
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a mounting base, configured to be locally secured relative to an entry portal in a surface; a trajectory guide assembly, adjustably coupled to the mounting base, the trajectory guide assembly including at least one adjustably orientable instrument guide structure to establish a trajectory for an instrument to be introduced through the entry portal in the surface; first and second imagable locators, coupled to the trajectory guide assembly at respective different first and second positions that are located away from the trajectory, the first and second imagable locators defining a first line therebetween that intersects the trajectory; and wherein the first and second imagable locators are each adjustably coupled to the trajectory guide assembly such that each of the first and second imagable locators are moveable to adjust the first line to substantially orthogonally intersect the trajectory at different points along the trajectory. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for use with a trajectory guide assembly that is adjustably coupled to a mounting base that is configured to be locally secured relative to an entry portal in a surface, the trajectory guide assembly defining a trajectory, through the entry portal, along which an instrument is introduced, the apparatus configured for confirming, using an imaging system, a depth to which the instrument is inserted along the trajectory, the apparatus comprising:
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a positioning assembly that is adapted to be coupled to the trajectory guide assembly and including a first and second side arm coupled to the positioning assembly at respective different first and second locations away from the trajectory, the first and second side arms each extending and axially adjustable along a longitudinal axis; first and second imagable locators, each coupled to a respective one of the first and second side arms of the positioning assembly such that, when the positioning assembly is coupled to the trajectory guide assembly, a first line between the first and second locators intersects the trajectory; and wherein the positioning assembly includes at least one positioner configured to permit adjustment of locations of the first and second imagable locators to adjust the first line to intersect the trajectory at different points along the trajectory. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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a mounting base, configured to be locally secured relative to an entry portal in a surface of a skull; a trajectory guide assembly, adjustably coupled to the mounting base, the trajectory guide assembly including; an instrument guide structure that is configured to establish a trajectory for an instrument to be introduced through the entry portal in the surface; a rotational joint, that permits the instrument guide structure to rotate about a first axis concentric to the entry portal and orthogonal to the surface; and an arc-shaped joint, that permits the instrument guide to tilt to adjust an angle between the trajectory and the first axis concentric to the entry portal; and a positioning assembly that includes first and second radial arms that are operable to be coupled to the instrument guide structure, first and second side arms that are adjustably coupled to a respective one of the first and second radial arms, and first and second imagable locators coupled to respective distal ends of the first and second side arms, the first and second side arms extending generally parallel to each other and orthogonal to the first and second radial arms, such that a first line formed between the first and second side arms intersects the trajectory, with the first and second imagable locator operable to indicate whether the instrument has reached a target along the trajectory. - View Dependent Claims (15, 16, 17, 18)
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19. A method comprising:
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locally mounting a base relative to an entry portal in a surface; obtaining a desired trajectory through the entry portal toward a target beyond the surface; inserting an instrument along the trajectory; positioning first and second imagable locators on opposing sides of the trajectory; and determining a depth of the instrument along the trajectory to ensure that the instrument has reached the target, in which the determining includes aligning the first and second imagable locators with the instrument and obtaining an image of the first and second imagable locators aligned with the instrument to determine the depth of the instrument using the first and second imagable locators. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A method comprising:
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locally mounting a base relative to an entry portal in a surface; adjusting an orientation of an instrument guide structure, with respect to the base, to obtain a desired trajectory through the entry portal toward a target beyond the surface; inserting an instrument along the trajectory using the instrument guide structure to guide the instrument along the trajectory; coupling first and second imagable locators to the instrument guide structure such that a first line between the first and second imagable locators orthogonally intersects the trajectory; and determining a depth of the instrument along the trajectory to ensure that the instrument has reached the target, in which the determining includes obtaining an image of the first and second imagable locators and the instrument. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification