Anales de la RANM

72 A N A L E S R A N M R E V I S T A F U N D A D A E N 1 8 7 9 POSTOPERATIVE BLOOD SALVAGE AFTER KNEE ARTHROPLASTY Valbuena I, et al. An RANM. 2022;139(01): 67 - 77 Figure 2. Comparison of the use of postoperative BS versus probability of transfusion. Results expressed as number and per- centage [n (%)]. BS: Blood Salvage. Chi-square Test; p=0,024. Figure 3. Haemoglobin and haematocrit levels during hospital stay in blood salvage exposed group and not exposed group.