Stereotactic device
First Claim
1. A stereotactic device for accurate placement of a medical instrument in a body, comprising:
- at least one vertical stanchion;
a support member attached to said stanchion, said support member being vertically movable along a portion of said stanchion;
a straight, horizontal bridge member attached to said support member perpendicular to said stanchion, said bridge member defining a longitudinal axis which passes through said support member;
a locking device for selectively securing said support member at a desired location along said stanchion; and
a guidance device mounted on said bridge member, said guidance device being selectively movable relative to said stanchion along the longitudinal axis of said bridge member, said guidance device further being selectively rotatable about an axis of rotation parallel to said longitudinal axis;
wherein said guidance device comprises a carrier adapted to carry the medical instrument for insertion in the body, said carrier being selectively movable along an arc defined by said guidance device to define a range of sagittal angles, said arc having a curvature such that the focus of said arc lies on said axis of rotation of said guidance device.
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Accused Products
Abstract
A stereotactic device of simplified structure, adaptable to align and precisely orient a variety of medical devices, such as differently sized needles, cannulas, and guide wires, into the human body for procedures, such as tumor biopsies, percutaneous discectomies, cyst aspirations, and tumor localizations, is described. The use in a stereotactic device is adapted for use in combination with a stereotactic bridge which includes a span rotatable on its horizontal axis and movably affixed to a C.T. scan table or an X-ray table by a positioning mechanism that provides for both vertical and horizontal movement of the span. The stereotactic device interacts with a C.T. scanner to achieve accurate placement of the selected medical device. Use of the stereotactic bridge allows alignment of the medical device in sagittal orientation with a high degree of accuracy.
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Citations
19 Claims
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1. A stereotactic device for accurate placement of a medical instrument in a body, comprising:
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at least one vertical stanchion; a support member attached to said stanchion, said support member being vertically movable along a portion of said stanchion; a straight, horizontal bridge member attached to said support member perpendicular to said stanchion, said bridge member defining a longitudinal axis which passes through said support member; a locking device for selectively securing said support member at a desired location along said stanchion; and a guidance device mounted on said bridge member, said guidance device being selectively movable relative to said stanchion along the longitudinal axis of said bridge member, said guidance device further being selectively rotatable about an axis of rotation parallel to said longitudinal axis; wherein said guidance device comprises a carrier adapted to carry the medical instrument for insertion in the body, said carrier being selectively movable along an arc defined by said guidance device to define a range of sagittal angles, said arc having a curvature such that the focus of said arc lies on said axis of rotation of said guidance device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A stereotactic device for accurate placement of a medical instrument in a body, comprising:
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at least one vertical stanchion; a support member attached to said stanchion, said support member being vertically movable along a portion of said stanchion; a straight, horizontal bridge member attached to said support member perpendicular to said stanchion, said bridge member defining a longitudinal axis which passes through said support member; a locking device for selectively securing said support member at a desired location along said stanchion; and guide means mounted on said bridge member for guiding a medical instrument into the body, said guide means being selectively movable relative to said stanchion along the longitudinal axis of said bridge member, said guide means further being selectively rotatable about an axis of rotation parallel to said longitudinal axis; wherein said guide means comprises carrier means for carrying the medical instrument for insertion in the body, said carrier means being selectively movable along an arc defined by said guide means to define a range of sagittal angles, said arc having a curvature such that the focus of said arc lies on said axis of rotation of said guide means. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification