Complex sentence: Compression stockings are elastic garments worn around the leg, compressing the limb, exerting pressure against the legs, reducing the diameter of distended veins, and causing an increase in venous blood flow velocity and valve effectiveness.
Split into simpler sentences: Compression stockings are elastic garments worn around the leg, compressing the limb. This reduces the diameter of distended veins and causes an increase in venous blood flow velocity and valve effectiveness.