Which equipment item is designed to limit deep vein thrombosis and peripheral edema in immobile patients?

A sequential compression unit is specifically designed to prevent deep vein thrombosis (DVT) and peripheral edema in patients who are immobile. This device works by applying pressure to the legs in a rhythmic sequence, which enhances venous return and promotes circulation. This helps to prevent blood from pooling in the veins, thereby reducing the risk of clot formation and swelling that can occur when patients are inactive for extended periods.

In contrast, other equipment items serve very different purposes. A respirator primarily aids in breathing support for patients who cannot breathe effectively on their own. An intermittent suction device is used for clearing the airways of secretions, which does not relate to the management of blood flow in the legs. A defibrillator is employed to restore normal heart rhythm during cardiac arrest, again unrelated to the prevention of DVT or swelling in immobile patients. Thus, the sequential compression unit stands out as the correct answer for addressing the specific needs of immobile patients in terms of circulation and edema management.