Anales de la RANM

73 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 TABLE 3.- Bleeding and allogenic blood transfusion risk factors Bleeding risk factor mean + SD (ml) p Male gender Male 943,75 + 528,08 Female 635,86 + 385,84 < 0,001 Atrial Fibrillation Yes 960,83 + 647,84 No 687,4 + 412,42 0,035 Anti-platelet therapy Yes 847,45 + 460,05 No 682,79 + 437,51 0,022 Cementless Primary TKA Cementless primary TKA 1200 + 327,87 TKA revision 532,05 + 325,86 0,017 Allogenic blood transfusion risk factors n (%) p ASA clasification: 0,032 - ASA I Yes ABT 0 (0%) No ABT 7 (100%) - ASA II Yes ABT 41 (24,3%) No ABT 128 (75,7%) - ASA III Yes ABT 27 (37%) No ABT 46 (63%) Preoperative Haemoglobin ABT in Hb < 13 g/dl 35 (57,4%) ABT in Hb > 13 g/dl 32 (16,5%) < 0,001 TKA revision ABT in TKA revision 10 (45,5%) ABT in primary TKA 59 (24,8%) 0,045 Preoperative anti-platelet therapy Yes ABT 20 (41,7%) No ABT 49 (23,1%) 0,011 Surgery time (minutes) Yes ABT 110,07 + 29,07 SD (min.) No ABT 100,62 + 21,82 SD (min.) 0,006 Total time (minutes) Yes ABT 162,7 + 31,44 SD (min.) No ABT 150,2 + 37,6 SD (min.) 0,016 TKA: total knee arthroplasty; ASA Classification: American Society of Anesthesiologists Classification; p: statistic signification.