A patient arrives in the recovery room after surgical wound debridement with a negative-pressure wound system in place. Which best describes how this type of therapy helps a wound to heal?


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- The negative pressure draws the edges of the wound together

- The wound vacuum stimulates keratinocyte formation

- The negative pressure decreases collagen production in the wound bed

- The wound vacuum removes granulation tissue if it develops


A negative-pressure wound system may be used for some types of wounds as part of healing. The system utilizes slight negative pressure like a vacuum to draw the edges of the wound together, remove bacteria that could cause infection, and stimulate circulation to the site to promote healing.

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