Normal blood counts fall within the range that has been established by testing healthy men and women of all ages. The cell counts are compared to those of healthy individuals of similar age and sex.

A typical platelet count range can change with age. Platelet counts may fluctuate due to natural vascular aging, changes in bone marrow tissue, and altered blood plasma makeup. Platelets, or ...

A normal platelet count is between 150,000 to 450,000 per microliter (mcL) of blood. This range is generally applicable to all adults. However, research has suggested that normal platelet counts might ...

Of 289 patients with bacteremia, 52% had normal WBC count and 17% had neither WBC elevation nor fever. Despite multiple studies showing that a normal white blood cell (WBC) count does not exclude ...

A high red blood cell count can occur for many reasons, including excessive cell production, changes in blood volume, or underlying medical conditions. Sometimes, the cause is unknown. Erythrocytes, ...

Q: I have been confused about what normal blood pressure is for me (or anyone). I know there are some issues on what normal is today, but let us say that normal is 120/80 mm Hg. Does this mean that ...

DEAR DR. ROACH: I have been confused about what normal blood pressure is for me (or anyone). I know there are some issues on what normal is today, but let us say that normal is 120/80 mm Hg. Does this ...