Which patient care device is designed to limit the development of deep vein thrombosis and edema for bedridden patients?

The sequential compression unit is specifically designed to help prevent deep vein thrombosis (DVT) and edema in patients who are bedridden or have limited mobility. This device works by applying intermittent pressure to the legs, which promotes venous blood flow back to the heart. By stimulating circulation, the sequential compression unit helps reduce the risk of blood clots forming in the deep veins of the legs, a common concern for patients who are immobile for extended periods.

The other options, such as compression stockings, while they do aid in venous return, provide a constant level of compression rather than the intermittent compression offered by a sequential compression unit. Mobility aids are intended to assist patients in moving about rather than provide support for blood circulation during immobility. A hydrocollator, which is used for heat therapy, does not address the prevention of DVT or edema. Therefore, the sequential compression unit distinctly fulfills the purpose of enhancing circulation in bedridden patients, making it the appropriate choice.