METHOD FOR SPECTROPHOTOMETRIC BLOOD OXYGENATION MONITORING OF ORGANS IN THE BODY

摘要

A method and apparatus for non-invasively determining a blood oxygen saturation level within an organ of a subject using direct application of a near infrared spectrophotometric sensor is provided. The method includes the steps of: a) transmitting a light signal directly into the subject's organ using the sensor; b) sensing a first intensity of the light signal and a second intensity of the light signal, after the light signal travels a predetermined distance through the organ of the subject; c) determining an attenuation of the light signal along multiple different wavelengths using the sensed first intensity and sensed second intensity; d) determining a difference in attenuation of the light signal between wavelengths; and e) determining the blood oxygen saturation level within the subject's organ using the difference in attenuation between wavelengths.

主权项

1. A method for monitoring the effects of cardioplegia administered to a heart, comprising:
applying a near infrared spectrophotometric sensor onto a region of the heart, which sensor is in communication with a processor adapted to receive data signals from the sensor, and is adapted to determine the oxygen saturation level within heart tissue using the data signals; sensing the oxygen saturation level within the heart tissue using the spectrophotometric sensor before an administration of a cardioplegia to the heart, and producing a pre-administration sensed heart tissue oxygenation level value using the processor; administering a cardioplegia to the heart; sensing the oxygen saturation level within the heart tissue using the spectrophotometric sensor after the administration of the cardioplegia to the heart, and producing a post-administration sensed heart tissue oxygenation level value using the processor.