Background: Fatigue in anaemia is empirically reduced by
blood transfusion. Long storage time of red cells may be associated
with immunomodulatory effects, and blood stored for a
long time may cause tissue hypoxia upon transfusion. Patients
and Methods: 22 patients admitted with haemoglobin < 6.0
mmol/l, complaints of fatigue and no active bleeding were included.
Eleven patients received two red cells units (SAGM)
stored less than 1 week (short storage time, S), and 11 patients
received two units stored more than 3 weeks (long storage
time, L). Fatigue was self-estimated on a visual analogue scale.
Clinical observations and blood samples were obtained before
transfusion was started, and were repeated 2-8 h after transfusion
of the 2nd unit. Measured plasma parameters included IL-
1ß, IL-6, IL-8, IL-10, IL-12 and TNF-a. Results: There were no significant
differences between group S and L (nsSL) in demographic
data, observational data and blood plasma values.
Haemoglobin increased from mean (± SD) 5.2 ± 0.6 to 6.4 ± 0.7
mmol/l after transfusion (nsSL). Fatigue score significantly decreased
from a pre-transfusion median 6.6 (range 0.1-9.9) to
post-transfusion 4.7 (0.6-10.0) (p = 0.02) for all patients (nsSL).
Beside increase in haemoglobin the only significant change in
blood parameters after transfusion was a decrease in thrombocyte
count (nsSL). No significant differences were seen in concentrations
of cytokines before and after transfusion. Conclusion:
Transfusion of two units of red cells relieved self-estimated
fatigue, independent of blood storage time. Thrombocyte
count decreased after transfusion, probably due to dilution by
transfused blood. Aged red cells may not, or only sparsely, directly
trigger the interleukin cascade.