Negative pressure wound therapy (NPWT) promotes wound healing through which primary mechanism?

• A Macro and microdeformation of the wound bed promoting cell proliferation, reducing edema, and removing inhibitory exudate ✓
• B Provision of a moist wound environment preventing eschar formation
• C Direct antiseptic action against wound biofilm bacteria
• D Collagen deposition through activation of fibroblasts via topical growth factors

Explanation

NPWT (vacuum-assisted closure) works through multiple mechanisms: macrostrain (mechanical wound contraction bringing wound edges together), microstrain (deformation at the cellular level stimulating angiogenesis and cell proliferation via mechanotransduction), removal of inhibitory wound exudate and inflammatory cytokines, reduction of interstitial edema, and maintenance of a moist microenvironment. The primary mechanism distinguishing NPWT from standard moist dressings is the combination of macro/microdeformation and exudate removal, reducing bacterial burden indirectly rather than directly.

Reference: Bailey & Love's Short Practice of Surgery, 27th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.