Needle with ultrasonically reflective displacement scale
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United States of America Patent
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Apr 15, 1986
Grant Date -
N/A
app pub date -
Nov 18, 1981
filing date -
Nov 18, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A puncturing device for insertion into the body, which has an ultrasonically coded displacement scale of gaseous inclusions regularly spaced along the length of the device. Owing to the acoustic reflectiveness of the gaseous inclusions, the precise location of the puncturing device can be directly and readily detected by an ultrasound visualization system. The acoustically reflective displacement scale enables the calibration of distances to be made directly from the ultrasound viewing screen. Located at the tip of the puncturing device is a gaseous inclusion which reveals the precise location of the tip of the device in the body.
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