DSA (density of the spectral array) spectral analysis is an important tool for processing the results of objective studies showing changes in the characteristics of brain bioelectrical activity over time. It clearly shows frequency, time and power, which makes it easy to identify changes in the frequency structure of EEG.
Neuro-IOM.NET software has not only EEG spectral analysis visualization in a separate window, there is also a possibility of advanced settings. For example, setting the minimum and maximum values of the DSA scale allows you to adequately evaluate the entire frequency spectrum of EEG with both high and low amplitude. The SEF (Spectral Edge Frequency) parameter displays quantitative trends of changes in the EEG structure.
A number of techniques have become possible in DSA spectral analysis window implemented in the Neuro-IOM.NET software:
- Monitoring the depth of anesthesia. Although each anesthetic causes different changes in brain rhythms, some common aspects can be used to assess the depth of anesthesia achieved with different agents. The effects of common anesthetic agents on brain electrical activity can be viewed here.
- Detection of decreased cerebral blood flow and ischemic lesions. Changes in spectral composition are observed at volume rates in the range of 10-22 ml/100 g/min. Rapid detection of decreased cerebral blood flow before perfusion falls to infarct-inducing levels (below 10-12 ml/100 g/min) is essential to prevent irreversible damage.
- Predicting the risk of postoperative delirium. This complication is still difficult to diagnose, but with the help of spectral analysis it is possible to track the risk of delirium during the surgery. In addition, with this information, doctors can adjust anesthesia during surgery, minimizing the risk of delirium.
EEG spectral analysis is a promising tool for polymodal intraoperative neuromonitoring. It is not limited to these techniques and can be useful in many other areas. EEG spectral analysis is already available for you in Neuro-IOM.NET software for all Neurosoft intraoperative monitoring systems.
