What is a key risk factor for developing thromboembolism post-surgery?

Immobility is a significant risk factor for developing thromboembolism after surgery because it can lead to stasis of blood flow in the veins, particularly in the lower extremities. When a person is immobile for extended periods, such as after surgery, blood circulation can slow or become stagnant, increasing the likelihood of clot formation. These clots can develop in the deep veins of the legs—a condition known as deep vein thrombosis (DVT). If dislodged, these clots can travel to the lungs, causing a pulmonary embolism, which is a serious complication.

In contrast, low blood pressure does not directly contribute to thromboembolism; instead, it is more related to inadequate blood flow and perfusion. High fluid intake is associated with better hydration and can actually help prevent clot formation by promoting smoother blood flow. Frequent mobility exercises actively counter immobility and help maintain circulation, which further reduces the risk of clotting. Therefore, promoting mobility and regular movement is crucial for patients after surgery to mitigate the risk of thromboembolism.