Surgery – Instruments – Stereotaxic device
Patent
1997-12-22
1999-09-28
Dawson, Glenn K.
Surgery
Instruments
Stereotaxic device
600417, 600429, A61B 1900
Patent
active
059579340
ABSTRACT:
A method and apparatus are described for guiding a penetrating tool to a predetermined point of interest within a three-dimensional object, such as a brain tumor within a human skull. A plurality of signal-transmitting markers disposed about the periphery of the object are used to determine the precise point of entry and slope of entry. A light ray is directed along the slope of entry to the point of entry, and a penetrating tool is directed along the path defined by the light ray. In a preferred embodiment, in which the point of interest is within the brain, additional signal-transmitting markers are placed through a very small skull opening directly at the point of interest and optionally about its periphery. When the skull is opened for surgery and the position of the point of interest in the brain shifts due to loss of pressure, the additional markers nevertheless will indicate the exact location of the point of interest.
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Dawson Glenn K.
Rapoport Uri
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