Which device is used to prevent thrombus formation in immobile patients?

Which device is used to prevent thrombus formation in immobile patients?

• A. Sequential compression devices
• B. Ambulatory aid
• C. Pacemaker
• D. Oxygen concentrator

Answer: (A)

Immobility slows venous blood flow in the legs, increasing the chance of clot formation (venous stasis). Sequential compression devices provide intermittent external pressure to the calves, mimicking the normal muscle-pump action. This boosts venous return, reduces pooling, and lowers the risk of thrombus development in patients who cannot move. The other devices don’t address clot prevention in this way: ambulatory aids help with movement but don’t mechanically reduce venous stasis; a pacemaker treats heart rhythm; an oxygen concentrator delivers oxygen.

Immobility slows venous blood flow in the legs, increasing the chance of clot formation (venous stasis). Sequential compression devices provide intermittent external pressure to the calves, mimicking the normal muscle-pump action. This boosts venous return, reduces pooling, and lowers the risk of thrombus development in patients who cannot move. The other devices don’t address clot prevention in this way: ambulatory aids help with movement but don’t mechanically reduce venous stasis; a pacemaker treats heart rhythm; an oxygen concentrator delivers oxygen.