What is the primary cause of stasis leading to DVT?

Prolonged immobility is recognized as the primary cause of venous stasis that can lead to deep vein thrombosis (DVT). When a person remains inactive for extended periods, such as during long flights, bed rest, or sedentary activities, blood flow in the veins slows down significantly. This stagnant blood flow increases the risk of clot formation, as the body relies on muscle movement to promote venous return to the heart. Without regular movement, blood can pool in the veins, setting the stage for the development of a thrombus.

While a sedentary lifestyle can contribute to the risk of DVT, it is the specific condition of prolonged immobility that directly leads to stasis. High-impact exercise typically does not cause stasis; instead, it promotes circulation and can help prevent DVT. Dehydration can affect blood viscosity and overall circulation but is not as directly related to stasis as prolonged immobility. Therefore, prolonged immobility stands out as the most significant factor contributing to the development of DVT.