Cerebral instrument guide frame and procedures utilizing it
First Claim
1. A cerebral instrument guide frame for use with a live human patient, comprising:
- a first arcuate member having first and second ends, and a radius;
a second arcuate member having first and second ends and a radius;
the radius of said second arcuate member greater than the radius of said first arcuate member;
aligned first and second openings provided adjacent each of said first and second ends of each of said first and second arcuate members;
first and second rigid ear fixator rods mounted in said aligned openings, the first in the openings adjacent said first ends of said first and second arcuate members, and the second in the openings adjacent said second ends of said first and second arcuate members, said rods mounted for movement with respect to said first and second arcuate members along a common axis passing through said openings, and said arcuate members mounted for pivotal movement with respect to each other about said common axis;
an abutment mounted on one of said arcuate members for engaging a portion of a patient'"'"'s head to preclude movement of said arcuate member past that portion of the patient'"'"'s head; and
an instrument guide mounted on the other of said arcuate members for guiding an instrument aligned therewith into contact with the patient'"'"'s head, said guide directed to the midpoint of said common axis.
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Accused Products
Abstract
A cerebral instrument guide includes first and second arcs with aligned openings adjacent their ends, the openings defining a common axis about which the arcs are pivotal. The rods are mounted for movement along the common axis into contact with a human patient'"'"'s auditory meati. A nasal bridge fixation element mounted on the first arc, as well as orbit pads, engage the bridge of a patient'"'"'s nose, and his/her bony orbits. The appropriate angle to which the arcs should be pivoted with respect to each other is calculated by a computer program, as is the position to which a tubular instrument guide, slidable along the second arc and a projection from it intersecting the mid point of the common axis, is to be positioned to mark the burr hole on the patient'"'"'s skull for performing a neurological procedure, such as a ventriculostomy. A needle is passed through the tubular instrument guide to mark the burr hole site. The cerebral instrument guide frame may be left in place, or removed, while a stereotactic instrument placement guide is used (after the burr hole is formed) to properly position the neurological instrument (e.g. catheter) used to perform the neurological procedure.
258 Citations
15 Claims
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1. A cerebral instrument guide frame for use with a live human patient, comprising:
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a first arcuate member having first and second ends, and a radius; a second arcuate member having first and second ends and a radius; the radius of said second arcuate member greater than the radius of said first arcuate member; aligned first and second openings provided adjacent each of said first and second ends of each of said first and second arcuate members; first and second rigid ear fixator rods mounted in said aligned openings, the first in the openings adjacent said first ends of said first and second arcuate members, and the second in the openings adjacent said second ends of said first and second arcuate members, said rods mounted for movement with respect to said first and second arcuate members along a common axis passing through said openings, and said arcuate members mounted for pivotal movement with respect to each other about said common axis; an abutment mounted on one of said arcuate members for engaging a portion of a patient'"'"'s head to preclude movement of said arcuate member past that portion of the patient'"'"'s head; and an instrument guide mounted on the other of said arcuate members for guiding an instrument aligned therewith into contact with the patient'"'"'s head, said guide directed to the midpoint of said common axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cerebral instrument guide for use with a live human patient'"'"' comprising:
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a first frame element having first and second ends, and a central portion; a nasal bridge fixation mounted on said first frame element at said central portion, and movable with respect to said first frame element; a second frame element having first and second ends, and a central portion; pivot means for mounting said first and second frame elements for pivotal movement with respect to each other about a common axis; an instrument guide mounted on said second frame element, and movable with respect thereto and directed toward the midpoint of said common axis; and means for positively locating said pivot means with respect to the patient'"'"'s head so that said axis remains stationary with respect to a predetermined portion of the patient'"'"'s head. - View Dependent Claims (12, 13, 14, 15)
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Specification