Oncology Certified Nurse (OCN) Nursing Practice Test

Which tests are used to diagnose DIC?

1. Complete blood count and liver function tests

2. Platelet count and D Dimer

3. CRP and ESR tests

4. Urinalysis and imaging studies

The correct answer is: Platelet count and D Dimer

The diagnosis of disseminated intravascular coagulation (DIC) primarily relies on identifying specific laboratory findings associated with abnormalities in hemostasis. Among the key tests for diagnosing DIC, the platelet count and D Dimer play critical roles. A decreased platelet count is a hallmark of DIC, as the disorder involves excessive activation of the coagulation cascade that leads to rapid consumption of platelets. Additionally, elevated levels of D Dimer indicate increased fibrin degradation, which occurs due to the formation and breakdown of fibrin clots in the microvasculature, a characteristic feature of DIC. These two tests together provide a clear picture of the coagulation state in patients suspected of having DIC, making them essential components of the diagnostic workup. In clinical practice, healthcare providers rely on these results to confirm the presence of DIC and guide further management.