Spinal marker needle
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 23, 1993
Issued Date -
N/A
app pub date -
Dec 26, 1990
filing date -
Mar 11, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radiographically opaque spinal marker needle having a lower portion consisting of a small bore hollow needle and an upper portion having a larger outside diameter. An intermediate penetration restriction member fixed to and surrounding the marker needle at a point proximate the junction of the upper portion and the lower portion limits the depth of penetration of the hollow needle into the patient or tissue, provides stability, and forms a large observable mass on an X-ray. In an alternative embodiment the larger upper bore portion is in the form of a syringe and includes a prefilled ampule of dye within the syringe for injection into the patient by a plunger assembly. The upper portion may be separable from the lower portion at a point above the pentration restriction member.
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Family
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Cited Art Landscape
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