Update on bispectral index monitoring

Area of Science:

• Anesthesiology
• Neurophysiology
• Medical Devices

Background:

• Bispectral index (BIS) monitoring has been used clinically since 1997.
• Originally approved for hypnosis monitoring, BIS now has an indication for reducing intraoperative awareness.
• Extensive research supports BIS in improving intermediate outcomes like reduced drug administration and faster recovery.

Purpose of the Study:

• To review the established and emerging applications of BIS monitoring in anesthesia and sedation.
• To discuss the impact of BIS on patient outcomes, including awareness and recovery.
• To highlight the limitations and future directions of BIS technology.

Main Methods:

• Review of experimental research and clinical practice data on BIS monitoring.
• Analysis of large-scale outcome studies, including randomized controlled trials and cohort studies.
• Discussion of BIS applications in various settings, including pediatrics, intensive care, and procedural sedation.

Main Results:

• BIS monitoring has been shown to reduce hypnotic drug administration, extubation time, and postoperative nausea.
• Two large studies demonstrated an approximately 80% reduction in the incidence of recall after anesthesia using BIS.
• BIS provides valuable data for individualizing hypnotic drug doses but does not predict movement or precise return of consciousness.

Conclusions:

• BIS technology offers significant benefits in reducing intraoperative awareness and improving patient recovery.
• Its utility extends beyond the operating room into intensive care and procedural sedation settings.
• Anesthesiologists should lead the safe and effective transition of BIS technology into broader clinical use.