March marks DVT Awareness Month, prompting us to discuss the intricacies of thrombus staging.

Understanding the stages of thrombosis is crucial in effectively managing this condition.


  1. Acute DVT: This refers to thrombosis occurring within the last 14 days. During this phase, collaterals are typically absent, and the thrombosis may be loosely attached or free-floating.
  2. Subacute DVT: Thrombosis falls into this category if it occurred between 14 to 28 days ago. Collaterals are now present, indicating a transitional phase in the progression of the condition.
  3. Chronic DVT: Thrombosis that has persisted for over 28 days is classified as chronic. During this stage, collaterals are more likely to be present, reflecting the body’s attempts to adapt to the blockage.

Ultrasound emerges as the gold standard noninvasive diagnostic tool for DVT. Its unparalleled ability to provide detailed insights into thrombus characteristics sets it apart from other imaging modalities. Through optimized B-mode imaging, we can discern thrombus features with acute precision, allowing us to gauge its chronicity and tailor treatment accordingly.

Contact Vein Specialists of the Carolinas to help you with your questions and examination of your veins.

“All We Do Is Veins, All Day Every Day.”


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