The risk of hypoxemia Table 3.11: The number of patients with hypoxemia and the time from the beginning of LFA to appears Parameters Group N0.5 (n = 37) Group N1 (n = 37) The number of patients with hypoxemia n (%) 12 (32.4) 0 (0, .0) Times (min) X ± SD Min - Max 97.2 ± 19.6 70 - 125 - Comments: In group N0.5, 32.4% of patients had hypoxemia after 97.2 ± 19.6 minutes of low current anesthesia.