Surgery – Instruments – Stereotaxic device
Patent
1990-01-16
1991-10-01
Cohen, Lee S.
Surgery
Instruments
Stereotaxic device
33512, 378208, A61B 1000
Patent
active
050530429
ABSTRACT:
A planar template and measuring device is provided for guiding a biopsy needle to a predetermined point with angular and radial coordinates, in a cross-sectional plane of a patient's torso, derived from CT scans of the patient. The device is configured to fit across and around the torso of a patient lying on the table of a CT scanner, when the device is positioned at right angles to the plane of the table and the long axis of the patient. The template is slidably mounted on rails attached to the long sides of the table so that it can be positioned at any point on the long axis of the patient. The device has an arcuate slot defining a part-circle marked with an angular scale, the center of which coincides with a central reference point of the CT scanner. A sliding carriage for a biopsy needle travels along the slot and may be set at any desired angle relative to the part-circle. The carriage has brackets which hold the needle in radial alignment relative to the part-circle and parallel to a linear scale scribed on the carriage. One of the brackets is adjustable permitting the needle to be set at any desired position along a given radius.
REFERENCES:
patent: 2430133 (1957-07-01), Thompson
patent: 4465064 (1984-08-01), Barbier et al.
patent: 4706665 (1987-11-01), Gouda
Akers Scott R.
Cohen Lee S.
Hobby III William M.
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