Table 1: Age, Preoperative and Postoperative Hematocrit, Hemoglobin and SpO2 Values

	Mean ± SD	Minimum	Maximum	Median
Age (year)	74.4 ± 13.3	60	91	75
Preoperative hematocrit (% )	35.9 ± 4.8	25	47	35.9
Preoperative Hb (gm/dl)	11.8 ± 1.8	8.4	16.2	11.9
Postoperative Ht (% )	32.8 ± 3.8	26	42	32.7
Postoperative Hb (gm/dl)	10.7 ± 1.4	8.0	13.0	10.6
Preoperative SpO2	96.0 ± 2.3	88	99	97
Postoperative SpO2	97.0 ± 2.1	90	99	97