Hematologic Response


At 200 Rads of acute total body exposure, the hematologic responses becomes more profound. As always, the lymphocytes are the first cells to resond by falling to 40% of their prior circulating level within several days. The neutrophils show a gradual decrease which reaches a low of about 60% at 45 days post exposure. Interestingly, there is a slight increase in the curve at 2-3 days and 2 weeks post exposure. The reason for this slight increase is unclear. The platelets show a gradual decrease to between 30 and 35% of the normal levels which reaches its lowest at 30 days post exposure. Despite the profound effects on these cells, bleeding and infections are still not usually seen.