Wound, Ostomy and Continence Nurses Society (WOCN) Practice Exam

Which of the following describes a type of dynamic compression therapy?

1. Static compression applied continuously

2. Sequential: legging applied 1-2x/day for 1-2 hours

3. Static compression for 8 hours

4. Continuous compression only

The correct answer is: Sequential: legging applied 1-2x/day for 1-2 hours

The correct answer accurately identifies a specific type of dynamic compression therapy—sequential compression. Dynamic compression therapy is characterized by its ability to change pressure patterns dynamically over time, as opposed to being uniformly applied. In sequential compression, devices (often referred to as sequential compression devices or SCDs) inflate and deflate in a sequenced manner to promote venous return and lymphatic drainage. This method enhances circulation by simulating a muscle pump effect, which can be particularly beneficial for patients at risk for venous thromboembolism or those with certain types of edema. Sequential compression therapy typically involves the application of legging devices that inflate intermittently for several periods throughout the day, often recommended to be used for a duration of 1-2 hours at a time, 1-2 times a day. This strategic timing aids in reducing swelling and improving venous blood flow without putting constant pressure on the limbs, setting it apart from purely static or continuous compression methods. The other options described static or continuous compression therapies, which do not involve the dynamic fluctuations in pressure that are essential to the definition of dynamic compression. Static compression applies a constant level of pressure over a prolonged period without fluctuation, while continuous compression lacks the alternating pressure that characterizes dynamic systems