LAUSR

in the same arm, always place the draw line PIV below the return PIV to avoid the risk of recirculation. 1 Publi-shed reports describing recirculation associated with apheresis, however, are notably lacking. We share our case as a clear, quantifiable example of recirculation due to poorly placed PIV in the same arm. We estimate that there was 75% recirculation based on the calculated CD34-CE, which was significantly lower than the CD34-CE in other HPCC during the same 30-day period (Figure 1B). We also believe that recirculation accounts for the unsteady collection preference and need to re-establish the interface observed during the procedure.