Abstract
Background: The bispectral index (BIS) derived from the electroencephalogram is an additional means of monitoring the depth of narcosis. Objective: To compare the monitoring of the depth of narcosis by the BIS associated with clinical data versus standard monitoring at the University Hospital of Parakou in Benin in 2019. Methods: This was an observational study for descriptive and analytical purposes with prospective data collection, carried out in general surgery and intensive care unit for 4 months. The inclusion criteria were: an age ≥ 18 years, an ASA score ≤ 3, surgery under general anesthesia and informed consent of the patient. Two groups were formed: non-BIS group monitored by clinical parameters (PA, FC, FR, EtCO2, and SpO2) only and BIS group monitored by bispectral index in addition to clinical parameters. Patients were seen 48 hours after the procedure. Results: 36 patients were collected. The mean age was 40.63 ± 16.77 years with a sex ratio of 3. ASA 1 patients represented 86.11% of the sample and ASA2 patients 13.89%. The average doses of Propofol were not significantly reduced in the BIS group (p = 0.555). On the other hand, the period of intraoperative recovery (p-value = 0.007) and the NVPO (p = 0.043; OR = 0.10; 95% CI [0.01 - 0.97]) were significantly reduced by the use of BIS. One case of intraoperative memorization (2.78%) was however found in the BIS group. Conclusion: The bispectral index makes it possible to significantly reduce the risk of intraoperative awakening and PONV, and not significantly reduce the consumption of Propofol.
Highlights
General Anesthesia (GA) is widely used during surgical procedures in operating theaters
Two groups were formed: non-BIS group monitored by clinical parameters (PA, FC, FR, EtCO2, and SpO2) only and BIS group monitored by bispectral index in addition to clinical parameters
Monitoring the depth of this sleep has long been a concern for anesthesiologists because of the morbidity and mortality associated with a poor dosage of anesthetic drugs, the administration of which depends on many parameters
Summary
General Anesthesia (GA) is widely used during surgical procedures in operating theaters. Clinical monitoring has been the only technique for monitoring the depth of narcosis. In order to improve the monitoring’s quality, new neurophysiological monitoring techniques have been invented and among them, the bispectral index (BIS) which is currently the most widely used. The bispectral index is a derivative of the electroencephalogram (EEG) that provides anesthesiologists with an additional way to monitor the depth of narcosis. The bispectral index (BIS) derived from the electroencephalogram is an additional means of monitoring the depth of narcosis. Objective: To compare the monitoring of the depth of narcosis by the BIS associated with clinical data versus standard monitoring at the University Hospital of Parakou in Benin in 2019. The inclusion criteria were: an age ≥ 18 years, an ASA score ≤ 3, surgery under general anesthesia and informed consent of the patient. Conclusion: The bispectral index makes it possible to significantly reduce the risk of intraoperative awakening and PONV, and not significantly reduce the consumption of Propofol
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