If the NPWT unit alarm indicates a lack of seal, what should you check?

• A. Check the patient's skin folds and drape around the tubing assembly or curved body areas
• B. Replace the entire unit
• C. Increase the wound suction immediately
• D. Remove the dressing and discontinue NPWT

Answer: (A)

An airtight seal is essential for NPWT to maintain the negative pressure that drives therapy. When the unit alarms for a lack of seal, the first step is to look for leaks at the dressing and tubing interfaces. Examine the skin folds and the drape around the tubing assembly or any curved body areas where wrinkles can create gaps. If you find wrinkles or lifting, smooth the drape, reposition the dressing, and reapply or reinforce the adhesive border so the edges are sealed. Make sure the tubing is connected properly and not kinked or occluded, and add tape or replace the dressing as needed to restore a complete seal. Replacing the entire unit is not necessary for a seal issue, increasing suction won’t fix a leak and could cause harm, and removing the dressing would interrupt therapy. Once a secure seal is achieved, the alarm should stop and negative pressure can resume.