11.2 Pressure Prevention, Repositioning, and Support Surfaces

Pressure Prevention, Turning, and Surface Selection

Pressure prevention begins with the relationship between tissue tolerance, pressure intensity, and pressure duration. A patient who cannot independently shift weight is exposed to longer pressure time, especially over bony prominences. Shear and friction add risk because they distort or abrade tissue, and moisture makes skin less resilient. WCC questions often ask which intervention best reduces the cause of injury, so look for the answer that lowers pressure and shear while supporting inspection and adherence.

A support surface is a tool, not a complete care plan. A reactive foam surface, powered redistribution surface, wheelchair cushion, heel suspension device, or operating-table pad may be appropriate in different settings. The exam will not expect brand selection. It will expect recognition that the surface must match mobility, moisture, weight distribution, existing skin status, transfer safety, and setting resources.

Use this prevention grid for exam items:

Applied WCC scenario guidance: a patient in long-term care has a high risk score, spends most of the day in a recliner, and develops heel redness. The strongest answer is not simply to order a specialty bed. The scenario points to heel offloading, seating assessment, scheduled weight shifts or repositioning, skin inspection, staff education, and documentation. If the patient also has moisture or nutrition risks, those belong in the prevention plan.

For exam purposes, distinguish pressure reduction from wound covering. A prophylactic foam dressing may help reduce friction or manage microclimate in selected areas, but it does not eliminate pressure. The correct response should still include pressure redistribution and repositioning. If the question asks for the best first prevention action, choose the answer that removes or reduces the mechanical load.

Support-surface questions also test reassessment. After a surface change, the team should monitor skin response, comfort, transfer safety, ability to reposition, and whether the surface is functioning as intended. A surface that traps heat, increases falls risk during transfer, or prevents the patient from moving may create new problems. WCC-style reasoning balances prevention benefit with tolerance and safety.

Exam trap: a powered surface does not make turning unnecessary. Another trap is confusing a pressure injury prevention surface with treatment for a wound caused by uncontrolled arterial disease, diabetes, or infection. If the wound cause is not pressure, the surface may still protect skin, but it is not the primary etiology-specific intervention. Always tie the surface choice to assessed pressure risk.

Documentation is part of prevention. Record risk findings, skin status, support surface or offloading plan, education, tolerance, refusals or barriers, and reassessment findings according to facility process. The WCC exam may present a legal or administration angle where failure to document the prevention plan is the weakness. Prevention that is not communicated or measured is unlikely to be sustained across shifts and settings.