How do compression hose aid in preventing blood clots?

Compression hose aid in preventing blood clots primarily by squeezing the legs to promote blood flow. The graduated compression provided by these garments encourages venous return, which is the process of blood returning to the heart from the lower extremities. This compression helps to alleviate venous stasis, a condition where blood pools in the veins, which can lead to clot formation.

By applying pressure to the surface veins, compression hose enhance the flow of blood and reduce the diameter of the veins, making it easier for the blood to flow back to the heart. This action effectively helps to mitigate the risk of clot development, particularly in individuals who may be immobile or at increased risk for venous thromboembolism due to various medical conditions.

The other options do not accurately describe the mechanism by which compression hoses operate. They are designed specifically to aid circulation rather than to affect airflow, increase blood pressure directly, or warm the blood. The focus here is on enhancing circulation through compression, which is the key function in preventing blood clots.