TRAJECTORY GUIDE, ACCESS PORT, AND FIDUCIAL MARKER ALIGNMENT

摘要

A trajectory guide for introducing an instrument into a human or animal subject is described. A guide stem can be removed in sections without disturbing the aligned instrument. An access port portion of the trajectory guide can be left in place, without disturbing trajectory alignment, and can allow overlying skin to be sutured closed. The access port can provide infusate delivery, such as using an injection port, catheter or the like. A fiducial marker arrangement can provide easy and accurate trajectory alignment, for use with the present trajectory guide, another trajectory guide, or without any trajectory guide.

主权项

1. A trajectory guide apparatus, comprising:
a base, configured to be able to be capable of being affixed substantially at a burr hole in a human or animal subject; a pivotably adjustable instrument guide, coupled to and pivotably adjustable with respect to the base, the instrument guide defining a longitudinal open passage therethrough defining an adjustable instrument trajectory; and a first set of one or more fiducial markers, disposed in and commonly defining a first plane extending orthogonal to the trajectory, and defining a first common centroid on the first plane at an intersection with the trajectory within the open passage.