Abstract
The mean intrasplenic red cell transit time (STT) and the slow mixing splenic red cell volume (SSV) have been measured in patients with hereditary spherocytosis (HS), autoimmune haemolytic anaemia (AIHA) and lymphoproliferative disease (LD). There was an inverse relationship between the mean red cell life span (MRCLS) and the STT in HS (r = -0.96, P less than 0.001) and in AIHA (r = -0.90, P less than 0.001). No such relationship existed in LD. The size of the spleen and the SSV were not related to the severity of haemolysis. Our data offer strong evidence for the conditioning effect of the spleen on HS- and AIHA red cells and suggest that the STT is an index of the adverse effect of the spleen on red cells in patients with HS or AIHA.
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