In renal dysfunction, uremia can cause which of the following platelet abnormalities?

In renal dysfunction, uremia can cause which of the following platelet abnormalities?

• A. Thrombocytosis
• B. Thrombocytopenia
• C. Neutropenia
• D. Nucleocytosis

Answer: (B)

Uremia from renal dysfunction primarily causes platelet dysfunction rather than a decrease in platelet numbers. The toxins that accumulate in kidney failure interfere with how platelets adhere to damaged vessels, aggregate, and release the substances needed for a proper hemostatic plug. This qualitative defect means a patient can have a normal platelet count but an increased bleeding tendency and a longer bleeding time. In this context, the key takeaway is that the abnormality is functional: platelets don’t work as well as they should, leading to mucosal or easy bruising tendencies even when platelet numbers are not reduced. Some patients with severe uremia may have additional mild reductions in platelet count, but that is not the defining issue. Management focuses on addressing the uremia (dialysis, optimizing renal function) and, acutely, measures like desmopressin to improve platelet function if bleeding occurs.

Uremia from renal dysfunction primarily causes platelet dysfunction rather than a decrease in platelet numbers. The toxins that accumulate in kidney failure interfere with how platelets adhere to damaged vessels, aggregate, and release the substances needed for a proper hemostatic plug. This qualitative defect means a patient can have a normal platelet count but an increased bleeding tendency and a longer bleeding time.

In this context, the key takeaway is that the abnormality is functional: platelets don’t work as well as they should, leading to mucosal or easy bruising tendencies even when platelet numbers are not reduced. Some patients with severe uremia may have additional mild reductions in platelet count, but that is not the defining issue. Management focuses on addressing the uremia (dialysis, optimizing renal function) and, acutely, measures like desmopressin to improve platelet function if bleeding occurs.