Which statement best describes the risk associated with a platelet count of 18,000 per microliter?

• A. Increased risk for infection.
• B. Risk for bleeding.
• C. No significant risk.
• D. Immediate risk of clotting.

Answer: (B)

The main idea is that platelets are essential for making the initial clot when a vessel is injured. When the platelet count is very low, like 18,000 per microliter, the body's ability to stop bleeding is greatly reduced. This level of thrombocytopenia means spontaneous bleeding can occur and even minor injuries can lead to prolonged or uncontrolled bleeding. That’s why the primary risk here is bleeding.

Infection risk is driven more by white blood cell counts, not platelets, so a very low platelet count doesn’t primarily raise infection risk. Clotting would be unlikely at this low level, since there aren’t enough platelets to form a proper clot. So the statement that best fits is the risk for bleeding.