The British Journal of Psychiatry 131: 59-62 (1977)
© 1977 The Royal College of Psychiatrists
The relationship between extra- and intracellular lithium concentration in human red blood cells: an in vitro study
JJ Ratey and AG Mallinger
Red blood cells (RBC's) from normal volunteers were incubated in vitro at
four different extracellular lithium concentrations. Extracellular lithium
concentration affected RBC lithium accumulation in several ways. As
extracellular lithium concentration increased, the inter- individual
variability of RBC lithium accumulation increased. Furthermore, the ratio
of RBC lithium concentration to extracellular lithium concentration
(lithium ratio) increased in relation to increasing extracellular lithium
concentration. A lack of agreement among the authors of recent reports
dealing with the significance of the lithium ratio as a psychobiological
measure has been noted. It is suggested that this lack of agreement may be
due, in part, to the study of patients with differing levels of
extracellular lithium.