Near-Infrared Spectroscopy for the Evaluation of Anesthetic Depth

Figure 1

Effect of bolus propofol induction (200 mg) on [Hb], [HbO₂], and [HbTot]. (a) Time before induction and (b) time after induction. Data collected from a 31-year-old female patient undergoing a laparoscopic hysterectomy. (G. Hernandez-Meza, personal communications, July 22, 2015, School of Biomedical Engineering, Science and Health Systems at Drexel University, Philadelphia, PA 19104).