What is the normal reference range for platelets?

What is the normal reference range for platelets?

• A. 100–300 x 10^3/µL
• B. 150–450 x 10^3/µL
• C. 200–500 x 10^3/µL
• D. 50–150 x 10^3/µL

Answer: (B)

Platelets are small cell fragments essential for forming clots to stop bleeding. The normal reference range for platelets is about 150,000 to 450,000 per microliter of blood (often written as 150–450 x 10^3/µL). Values below 150,000 indicate thrombocytopenia, which increases bleeding risk, while values above 450,000 suggest thrombocytosis, which can raise the risk of unwanted clotting. This range is the standard for interpreting a platelet count, making it the best answer for identifying a normal level.

Platelets are small cell fragments essential for forming clots to stop bleeding. The normal reference range for platelets is about 150,000 to 450,000 per microliter of blood (often written as 150–450 x 10^3/µL). Values below 150,000 indicate thrombocytopenia, which increases bleeding risk, while values above 450,000 suggest thrombocytosis, which can raise the risk of unwanted clotting. This range is the standard for interpreting a platelet count, making it the best answer for identifying a normal level.