The New anesthesia depth- Electroencephalogram Monitor

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During general anesthesia in adults (and children over 1 year old),  the anesthetist should be able to adjust the amount of anesthetic agent to the needs of the patient, possibly resulting in a more rapid emergence from anesthesia. Depth of anesthesia is a theoretical construct  to conceptualize anesthetic effects on the central nervous system as discrete or continuous phases or states. Clinical signs for assessing anesthetic depth are currently being supplemented by brain monitors. Their use may help to prevent insufficient anesthesia, which can lead to intraoperative awareness with recall, as well as anesthetic overdose.

Bispectral index (BIS)
BIS is one of several recently developed technologies which allows to monitor depth of anesthesia. BIS monitors carry out titrating  of anesthetic agents to a specific bispectral index during anesthesia. Use of the BIS monitor is thought to reduce the incidence of intraoperative awareness in surgeries. The algorithm is a proprietary information, which means that it is kept secret by the company that developed it.

 A new ECG monitor from Neuro Wave
NeuroWave, Ohio, released their new small and lighter version of NeuroSENSE Monitor (NS-701) for monitoring the depth of anesthesia and sedation. This bilateral brain monitor, designed with independent indices for each brain hemisphere, has a 10.4″ monitor screen, as well as advanced EEG algorithms that crunch the company’s proprietary depth of anesthesia indexes.

According to the company, the new monitor “integrates a new optimized algorithm for the...



detection of cortical suppression in noisy recordings and for the detection of near-suppression periods during spindle activity.”

Added features with the product :

  1. Delay-free tracking of patient state via low-noise WAVCNS1 bilateral indexes, which provide instantaneous tracking of the patient state
  2. Automatic trending facilitates immediate response without increasing the index noiseTrue bilateral monitoring with great inter-hemispheric reproducibility
  3. Increased reliability due to redundancy (asymmetry due to underlying pathologies or unrecognized artifacts can be easily detected)
  4. Superior prediction of loss of consciousness
  5. Linear response to increasing EEG suppression
  6. Robust hardware with superior signal quality
  7.  Advanced automated artifact detection and removal
  8. Electro-surgical interference detection and filtering Cardiac defibrillation proof
  9. Continuous measurement of electrode-skin contacts
  10. High-resolution clinical EEG tracings suitable for interpretation by EEG experts.
  11. Availability of raw EEG data and Transparent, published algorithm.

The device is compliant with the guidelines of International Federation of Clinical Neurophysiology (IFCN) and American Clinical Neurophysiology Society (ACNS)

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