FIELD: medical engineering. SUBSTANCE: device has ruler having scale ticks spaced all the length long in parallel to each other corresponding to digital values of relative B-lymphocyte contents in peripheral blood and a scale of IgG absolute contents digital values having united coordinates base. Cursor is movable along the ruler to match peripheral blood lymphocyte percentage with the corresponding B- lymphocyte contents percentage given in digital form and/or with the IgG digital values. EFFECT: accelerated low cost procedure. 11 cl, 1 dwg
