System and method for detecting vascular contamination by surgical anesthetic using non-invasive IR spectrophotometry


Ontology type: sgo:Patent     


Patent Info

DATE

2018-10-02T00:00

AUTHORS

CLENDENEN STEVEN R , HAIDER CLIFTON R , GILBERT BARRY K , SPEES OLIVER WILLIAM

ABSTRACT

A system and method for detecting vascular contamination by surgical anesthetic using non-invasive IR spectrophotometry. One embodiment is a method for operating an instrument such as an enhanced pulse oximeter to monitor a patient receiving local anesthetic marked with dye that absorbs infrared light. Light is applied to and detected from tissue of the patient. A signal representative of the detected light is processed to derive patient oxygenation information. The detected light is also processed to derive information representative of the presence of the dye-marked anesthetic. The oxygenation information and the information representative of the presence of anesthetic are displayed. The oxygenation monitoring and display and the anesthetic monitoring and display can occur separately or concurrently. Fluorescing dyes and fluorescence detection approaches are used for anesthetic detection in some embodiments. Other embodiments apply a sequence of light pulses and correlate the applied light pulse sequence to the detected signal to identify the presence of the dye-marked anesthetic. More... »

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