Near-Infrared Spectroscopy for the Evaluation of Anesthetic Depth

Figure 2

Example of the effect of changes in position on female patient (58 years old) during laparoscopic salpingo-oophorectomy using general anesthesia with 2.4% sevoflurane. (a) Response of Hb, HbO₂, and HbTot during transition from (1) supine position to (2) Trendelenburg position. (b) Transition from (3) Trendelenburg position to (4) supine position. (G. Hernandez-Meza, personal communications, July 22, 2015, School of Biomedical Engineering, Science and Health Systems at Drexel University, Philadelphia, PA 19104).

(a)

(b)