Patent ID: 7699854
Filing Date: 2010-04-20
Classification: A61B

Abstract:
1. A method comprising: securing an apparatus having a base and an instrument guide relative to an entry portal of a subject, the instrument guide defining a first lumen having a first axis and a second lumen having a second axis, the first and second axes being fixed relative to each other at a nonzero first angle; moving a position of the instrument guide with respect to the base and the entry portal such that the first axis passes substantially through a center of the entry portal toward a target in the subject and such that a second trajectory through the instrument guide along the second axis is directed through the entry portal, wherein the moving the position of the instrument guide includes selecting the first angle to provide a predetermined offset distance between intersection points of the first and second axes with a range plane, beyond the entry portal, that is substantially orthogonal to the first axis; and adjusting a height between the instrument guide and the entry portal to adjust a distance between the entry portal and the range plane corresponding to the predetermined offset distance.