bispectral index , BIS (Abkürzung)

The bispectral index is a statistically based, empirically derived complex parameter.

Equipment that monitors depth of anesthesia, such as bispectral index monitoring, should not be used in isolation.

The bispectral index is prone to artifacts.

The monitoring of other parameters such as anaesthesia depth monitors (EEG, bispectral index etc.) may also be necessary.

The signal is captured via a forehead mounted sensor, in a similar way employed by bispectral index (BIS).

Bispectral index (BIS) is one of several technologies which purport to monitor depth of anesthesia.

The device described in the filings, a bispectral index monitor, is in any event not a suitable substitute for medical monitoring, its maker and prominent anesthesiologists said.

A form of bispectral analysis called the bispectral index is applied to EEG waveforms to monitor depth of anaesthesia.

Also, there are special patient monitors which incorporate the monitoring of brain waves (electroencephalography, gas anesthetic concentrations, bispectral index (BIS), etc.

The technique, called bispectral index monitoring, or BIS monitoring, is used in only about a quarter of operations in the United States, and much less elsewhere.

A-2000 bispectral index (BIS) consciousness monitor, Aspect Medical Systems (Newton, MA)

Myles PS, Leslie K, McNeil J, et al: Bispectral index monitoring to prevent awareness during anaesthesia: the B-Aware randomised controlled trial.

Monitoring Consciousness Using the Bispectral Index During Anesthesia by Scott D. Kelley M.D. (PDF)

The bispectral index has not been proven to measure the level of consciousness, independently of the cause of reduced consciousness (whether this be drugs, metabolic disease, hypothermia, head trauma, hypovolemia, natural sleep and so on).

Bispectral index (BIS) was introduced by Aspect Medical Systems, Inc. in 1994 as a novel measure of the level of consciousness by algorithmic analysis of a patient's electroencephalogram during general anesthesia.

Sophistication in bedside EEG hardware is increasing, with multi-channel EEG recording, various data reduction functions such as the Bispectral Index, and evoked potential analysis becoming available to the ICU.

These newer technologies include the bispectral index (BIS), EEG entropy monitoring, auditory evoked potentials, and several other systems such as the SNAP monitor and the Narcotrend monitor.

Titrating anesthetic agents to a specific bispectral index during general anesthesia in adults (and children over 1 year old) allows the anesthetist to adjust the amount of anesthetic agent to the needs of the patient, possibly resulting in a more rapid emergence from anesthesia.

This is because as anaesthesia "deepens", there are predictable changes in the EEG including slowing, synchronicity, and burst suppression, that, in the case of BIS (Bispectral index) or Entropy, are converted to a number expressing the likelihood of awareness.

The correlation between bispectral index in children over one year and state of consciousness has already been proven, although in younger patients the monitor is unreliable because of the differences between immature infant EEG patterns and the adult EEG patterns that the BIS algorithm utilises.