Bispectral Index Measurements Are Not Degraded During Aeromedical Evacuations

Abstract

For a decade, depth of anesthesia monitoring has become a reality in the operating room. It provides valuable help for managing anesthesia, especially for unstable patients. This might be particularly relevant during aeromedical evacuation. In this study, we aimed to assess the validity of the bispectral index (BIS) during long-range patient transportation aboard fixed-wing aircraft. BIS was recorded in 30 patients, 25 under anesthesia and 5 awake, during aeromedical evacuations performed by the French Air Force. BIS index was available and analyzable (signal quality index above 50%) more than 90% of time. Despite potential pitfalls related to mechanical or electrical interference, BIS monitor can be reliably used to monitor depth of anesthesia during individual strategic aeromedical evacuations.

Preemptive Anti–Stress Response Effects of Oxycodone Versus Sufentanil for Patients Undergoing Cardiac Valve Replacement—A Randomized Controlled Trial

“…The BIS was used to judge the level of sedation and monitor the depth of anesthesia. The BIS value ranges from 0 to 100: 85 to 100 for normal state, 65 to 85 for sedative state, and 40 to 65 for anesthetic state . The OAA/S score ranges from 1 to 5: 1 = does not respond to mild prodding or shaking; 2 = responds only after mild prodding or shaking; 3 = responds only after name is called loudly and/or repeatedly; 4 = lethargic; and 5 = responds to name spoken in normal tone.…”

Effect of Carbon Dioxide on Bispectral Index of EEG under Intravenous Target-Controlled Anesthesia Based on Intelligent Medical Treatment

“…Whether there is awareness, memory, and implicit memory in anesthesia depends on the sedation depth in anesthesia. It is found that the BIS value is 75∼90 in light sleep, 75∼92 in rapid eye movement, and 20∼70 in slow-wave sleep [ 18 ]. It is more advantageous to distinguish the existence and disappearance of consciousness.…”