Fig. 4
From: Anesthesia depth monitoring during opioid free anesthesia – a prospective observational study
Secondary quantitative outcome. Data from processed electroencephalography and density spectral array (DSA) for all ten patients in opioid-free anesthesia (OFA) group. Patients in this figure were labeled a1 - j1 starting on top left to bottom right. All patients were considered to be in anesthetic steady state after skin incision