Method for the non-invasive detection of an intravascular injection of an anesthetic by the use of an indicator dye
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United States of America Patent
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Apr 4, 1995
Issued Date -
N/A
app pub date -
Jun 7, 1994
filing date -
Apr 29, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus in which an anesthesia catheter is inserted into the epidural space of the patient. A blood soluble dye mixed with a local anesthetic is injected through the catheter and into the patient. A transducer clip is positioned on the finger of the patient for monitoring the light responsive characteristics of the patient's blood. A transducer signal is fed to a microprocessor for generating a real time display for indicating to the anesthesiologist that the dye, and therefore the local anesthetic, is present in the bloodstream.
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