Certified Wound Ostomy Nurse (CWON) Practice Test

How deep must air chambers be for optimal functioning of alternating pressure surfaces?

1. 5cm

2. 10cm

3. 15cm

4. 20cm

The correct answer is: 10cm

For optimal functioning of alternating pressure surfaces, the appropriate depth of air chambers is essential for effective pressure redistribution and maintenance of the therapeutic benefits these surfaces provide. A depth of 10 centimeters allows for adequate air displacement, facilitates proper cycling between inflation and deflation of the chambers, and provides sufficient cushioning for the patient. This depth is necessary to prevent bottoming out when the patient’s weight is applied, ensuring that the alternating pressure system can accurately relieve pressure points. A depth that is too shallow can lead to insufficient air volume and inadequate pressure relief, while excessive depth may cause instability and ineffective pressure redistribution. Understanding this depth requirement is crucial for healthcare professionals in the management of patients at risk for pressure injuries.