Patent US5474564A successfully refreshed from Google Patents.
US5474564A
Expired / Lapsed
US
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Method of utilizing a cerebral instrument guide frame
Assignee: Individual
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Filing: 1994-04-01
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Granted: 1995-12-12
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Expires: 2014-04-01
Abstract
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.
Inventors
- 👤 David A. Clayman
- 👤 Tai Q. Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
A; A61; A61B; A61B90/00; A61B90/10; A61B90/11; A61B90/36; A61B2090/363; A61B90/39; A61B2090/3954; A61B90/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
A method of performing a neurological procedure on a human patient utilizing imaging equipment, a cerebral instrument guide frame, and an operating room, comprising the steps of substantially sequentially: (a) effecting coordinate multiplanar tomographic diagnostic imaging of the patient's head with the imaging equipment while the patient's head is free of frame attachments, to obtain data necessary for performing a neurological procedure; (b) moving the patient to the operating room; (c) in the operating room, utilizing the data from the diagnostic imaging of step (a), fixing the cerebral instrument guide frame on the patient's head; and (d) substantially immediately after step (c), in the operating room, without transporting the patient back to the imaging equipment to effect a second imaging, performing the neurological procedure on the patient, utilizing the cerebral instrument guide frame to guide one or more medical instruments.
Claim 2
Independent Claim
140 words
A method of performing a neurological procedure on a human patient utilizing imaging equipment, a cerebral instrument guide frame, and an operating room, comprising the steps of substantially sequentially: (a) effecting coordinate multiplanar tomographic diagnostic imaging of the patient's head with the imaging equipment while the patient's head is free of frame attachments, to obtain data necessary for performing a neurological procedure; (b) moving the patient to the operating room; (c) in the operating room, utilizing the data from the diagnostic imaging of step (a), fixing the cerebral instrument guide frame on the patient's head; and (d) substantially immediately after step (c), in the operating room, without transporting the patient back to the imaging equipment to effect a second imaging, performing the neurological procedure on the patient, utilizing the cerebral instrument guide frame to guide one or more medical instruments.
Claim 3
Dependent Claim
159 words
A method as recited claim 1 wherein during the practice of step (a) there is non-zero angle of inclination between imaging equipment and the patient and while there is an incremental advance between images; and wherein step (a) is practiced by the sub-steps of: (a1) during coordinate multiplanar tomographic imaging of the patient's body, determining the coordinates of a first point on or within the patient's body; (a2) during coordinate multiplanar tomographic imaging of the patient's body, determining the coordinates of a second point on or within the patient's body; (a3) determining the non-zero angle of inclination of the imaging equipment with respect to the patient and the incremental advance between images; and (a4) utilizing the coordinates of the first and second points, the non-zero angle of inclination, and the incremental advance, by vector parameterization calculating the distance between the first and the second points and the loci of points along a line containing the first and second points.
Claim 4
Dependent Claim
36 words
A method as recited in claim 2 wherein step (a4) is practiced by calculating the straight line distance between the first and second points and the loci of points along a straight line containing those points.
Claim 5
Dependent Claim
17 words
A method as recited in claim 2 wherein steps (a1) and (a2) are practiced by CT scanning.
Claim 6
Dependent Claim
30 words
A method as recited in claim 2 wherein the neurological procedure of step (d) is selected from the group consisting essentially of ventriculostomy, biopsy, radioactive seed placement, and lesion generation.
Claim 7
Dependent Claim
30 words
A method as recited in claim 1 wherein the neurological procedure of step (d) is selected from the group consisting essentially of ventriculostomy, biopsy, radioactive seed placement, and lesion generation.
References Cited (Backward Citations)
US3053256A
Cited
US4638798A
Cited
US4618978A
Cited
US5078140A
Cited
US4791934A
Cited
US5016639A
Cited
US5300080A
Cited
US5309913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |