Interrogation device and method
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United States of America Patent
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-
Mar 23, 1999
Issued Date -
N/A
app pub date -
Oct 21, 1997
filing date -
Jan 16, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An interrogation device is used to locate a nerve within the body. The device uses a piezoelectric crystal to locate a pulsing vessel proximate with the nerve. As the device is guided toward the nerve, it can emit an electric signal to stimulate the nerve. The operator can then watch for any physical reaction from the patient in response to nerve stimulation. As the device closes upon the nerve, pressure is applied with the needle to the vessel, thus compressing the vessel, diminishing the doppler response. Once the surface of the nerve is located, it can be accurately anesthetized.
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