Anesthesia depth monitoring system and method based on near infrared spectroscopy

Abstract

The invention provides an anesthesia depth monitoring system and method based on near infrared spectroscopy. The anesthesia depth monitoring system comprises a cerebral blood oxygen signal acquisitionmodule A, a sample entropy calculating module B, a target signal identification module C and an optimal threshold determining module D; first, various Hb and HbO2 signals of the prefrontal lobe of apatient are collected through near infrared light with the wavelength being 735 nm and near infrared light with the wavelength being 850 nm correspondingly, and band-passing filtering of 0.01-0.04 Hzis conducted; then data processing is conducted by a sample entropy algorithm, and the sample entropy values of the patient at different stages are calculated; by drawing an ROC curve, signals with the highest distinguishing capacity to an anesthesia state and a waking state are selected by an ACU value; at last, the optimal threshold value capable of distinguishing the anesthesia stage and the waking stage is found through a youden index, and the anesthesia depth is monitored by the threshold value. The anesthesia depth monitoring system and method have the advantages that the data length required by calculating is small, the operation efficiency is high, the signals needing to be monitored can be screened out more quickly, safety and convenience are achieved, and the prince is low.

Description

technical field [0001] The invention relates to the technical field of biomedical signal processing, in particular to a system and method for monitoring depth of anesthesia based on near-infrared spectrum technology, which is mainly used in clinical monitoring of the depth of anesthesia of patients undergoing general anesthesia. Background technique [0002] Anesthesia, especially general anesthesia, is a common means in clinical treatment. Generally, during the operation, the patient's central nervous system is inhibited by intravenous injection or inhalation of anesthetic drugs, so that the patient shows loss of consciousness, decreased motor function, pain stimulus response disappears, etc., so that the patient loses the memory of the pain sensation during the operation. , Increase the safety of the operation to facilitate the operation. Anesthesia depth monitoring is an important method to ensure the quality of anesthesia in clinical operations. If the depth of anesthe...

AI Technical Summary

Problems solved by technology

However, AEP monitors are easily affected by the surrounding environment. At the same time, AEP relies on human hearing, which makes it difficult for patients with hearing problems to use this method.

For the monitoring method of anesthesia depth based on EEG signals, in clinical operations, the use of high-frequency electrocautery will greatly interfere with the acquisition of brain signals, thus affecting the application effect of the monitoring method

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