Criteria	Thrombosis	Embolism
Definition	Formation of a blood clot within a blood vessel	Obstruction of a blood vessel by a detached embolus
Etiology	Endothelial injury, stasis of blood flow, hypercoagulability	Migration of a thrombus or other foreign material
Location	Can occur in both arteries and veins	Usually occurs in arteries
Pathophysiology	Blood clot forms and adheres to the vessel wall	Detached embolus travels through the bloodstream
Clinical Features	Localized pain, swelling, redness	Sudden onset of symptoms, depending on the affected organ
Risk Factors	Immobility, surgery, trauma, pregnancy	Atrial fibrillation, deep vein thrombosis, cardiac disorders
Diagnosis	Doppler ultrasound, angiography, D-dimer test	Imaging techniques (CT scan, MRI), angiography, D-dimer test
Treatment	Anticoagulation therapy, thrombolytic therapy	Embolectomy, anticoagulation therapy, thrombolytic therapy
Clinical Significance	Thrombosis can lead to tissue ischemia, infarction, and organ damage	Embolism can cause sudden occlusion of blood vessels, leading to tissue ischemia and infarction

Thrombosis refers to the formation of a blood clot within a blood vessel. It can occur in both arteries and veins and is often caused by endothelial injury, stasis of blood flow, or hypercoagulability. Thrombosis can lead to localized pain, swelling, and redness. It is diagnosed using Doppler ultrasound, angiography, and D-dimer tests. Treatment options include anticoagulation therapy and thrombolytic therapy.

Embolism, on the other hand, is the obstruction of a blood vessel by a detached embolus. It usually occurs in arteries and is caused by the migration of a thrombus or other foreign material. Clinical features of embolism include sudden onset of symptoms, which vary depending on the affected organ. Diagnosis is made using imaging techniques such as CT scan, MRI, angiography, and D-dimer tests. Treatment options include embolectomy, anticoagulation therapy, and thrombolytic therapy.