Table 2. Patient characteristics.

Age (Mean ± SD)	60.2 ± 14.0
BMI (Mean ± SD)	27.6 ± 6.5
Sex (N,%) Male Female	102 (63.4 %)  59 (36.6 %)
ASA classification (N,%) ASA I ASA II ASA III ASA IV	3 (1.9 %)  52 (32.3 %)  91 (56.5 %)  15 (9.3 %)
Past medical history of underlying respiratory disease (N,%)	26 (16.2 %)
Patient requiring baseline oxygen (N,%)	104 (64.6 %)
Hemoglobin prior to the procedure (mean ± SD)	8.5 ± 2.0
INR prior to the procedure (mean ± SD)	1.6 ± 0.7
Transfusion history prior to the procedure (mean [min – max] units) PRBC Platelets Fresh frozen plasma	1.3 (0 – 17)   0.1 (0 – 4)   0.5 (0 – 8)

SD, standard deviation; BMI, body mass index; ASA, American Society of Anesthesiologists; INR, international normalized ratio; PRBC, packed red blood cells