A sequential compression device (SCD) is a medical tool designed to enhance circulation and prevent deep vein thrombosis (DVT) and pulmonary embolism (PE) in immobile patients through a cyclic inflation and deflation mechanism. Its use is crucial, particularly for post-surgical patients, as it helps reduce the risk of blood clots and enhances overall blood flow. Nursing considerations include assessing patient suitability, monitoring for adverse reactions, and documenting therapy details to ensure effective care.