Figure 2

SpO ₂ values according to anesthetic time point and anesthetic use (BUPI or LEVO). BUPI = hyperbaric bupivacaine; LEVO = isobaric levobupivacaine; Oxygen saturation: pre = partial oxygen saturation at operating room (OR) admission; Oxygen saturation: intra = partial oxygen saturation at 30 minutes after onset of anesthesia; Oxygen saturation: post = partial oxygen saturation at the end of anesthesia; SpO₂% = partial oxygen saturation. ^★p <0.05 from preoperative values; 0 = atypical value (the numbers next to atypical values refer to case number in the database and not the value of the SpO₂).