title: Effects of blood transfusions on some hematological variables in endurance athletes.
abstract: Selected hematological variables (blood hemoglobin concentration [Hb], serum (s-) iron, s-bilirubin, s-ferritin, blood lactate, and s-erythropoietin [Epo]) were analyzed before and for 4 wk after autologous blood transfusions. A group of well-trained (8 male and 4 female) former endurance athletes was phlebotomized and 3-4 months later reinfused with the freezer-stored autologous red blood cells (RBC) from 1350 ml of blood. The [Hb] increased significantly (P less than 0.001 for both sexes) from 146.7 +/- 5.31 and 131.7 +/- 11.20 g. l-1 immediately before reinfusion to maximum values of 163.5 +/- 7.47 and 155.9 +/- 11.43 g.l-1 (mean +/- SD) in males and females, respectively, 2 d after reinfusion. S-iron increased transiently 5 h after reinfusion. S-bilirubin remained unchanged throughout the study. S-ferritin increased gradually (P less than 0.02) from 48 +/- 32.91 mmol.l-1 before reinfusion to a maximum of 80.8 +/- 39.52 mmol.l-1 2 wk after reinfusion. S-[Epo] increased transiently (P less than 0.01) from 8.83 +/- 2.51 (mean +/- SD) to 12.36 +/- 5.64 U.l-1, (mean +/- SD) 5 h after reinfusion. Subsequently, there was a significant marked decrease in s-[Epo] to 5.85 +/- 1.32 U.l-1, (mean +/- SD) 1 d after reinfusion (P less than 000.1, as compared to before reinfusion). Thereafter, s-[Epo] remained low throughout the study. Blood lactate was significantly decreased only the first 2 d after reinfusion (P less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Medicine and Clinical Physiology, Karolinska Hospital, Stockholm, Sweden.
authors.forename: B
authors.initials: B
authors.lastname: Berglund
authors.forename: G
authors.initials: G
authors.lastname: Birgegård
authors.forename: L
authors.initials: L
authors.lastname: Wide
authors.forename: P
authors.initials: P
authors.lastname: Pihlstedt
mesh_terms: D000328:Adult; D000465:Algorithms; D001663:Bilirubin / Q000097:blood; D001804:Blood Transfusion, Autologous; D005260:Female; D005293:Ferritins / Q000097:blood; D006403:Hematologic Tests; D006801:Humans; D007501:Iron / Q000097:blood; D007773:Lactates / Q000097:blood; D008297:Male; D008875:Middle Aged; D010807:Physical Endurance / Q000502:physiology*; D013177:Sports
chemical_list: D007773:Lactates; D005293:Ferritins; D007501:Iron; D001663:Bilirubin