Negative pressure wound therapy carries a specific set of recognized complications beyond the more obvious and commonly discussed issue of seal failure — understanding this fuller complication profile is what allows clinicians and trained caregivers to recognize genuine warning signs rather than treating NPWT as a set-and-forget therapy once properly initiated.
Bleeding Is the Most Serious Recognized Complication
Bleeding, in rare cases significant enough to be life-threatening, represents the most serious recognized NPWT complication, particularly when the therapy is used near blood vessels, following recent surgery, or in patients on anticoagulant therapy — this risk is precisely why NPWT initiation and dressing changes near major vessels or in high-bleeding-risk patients generally involves more conservative foam placement technique and closer monitoring than standard use, and any new or unexpected blood in the collection canister warrants prompt clinical evaluation rather than being assumed to be routine wound drainage.
Retained Foam Fragments Are a Documented, Preventable Error
A specific and entirely preventable NPWT complication involves foam dressing fragments inadvertently left in the wound during a dressing change, which can cause infection or delayed healing if not identified — this is why dressing change protocols specifically include counting and confirming complete foam removal as a documented step, treating this the same way a surgical team accounts for instruments and sponges during a procedure, rather than assuming visual inspection alone reliably catches every fragment.
Pain During Therapy Initiation and Pressure Changes Is Common but Manageable
Pain associated with NPWT, particularly during initial application and during changes in pressure settings, is a recognized and common experience rather than an unusual complication — this pain is generally manageable with appropriate premedication and gradual pressure adjustment rather than an immediate jump to full therapeutic pressure, and clinicians who proactively address anticipated pain rather than only responding after a patient reports significant discomfort generally achieve better patient tolerance of the therapy overall.
Periwound Skin Breakdown Reflects a Real Maceration and Adhesive Risk
The adhesive drape required to maintain NPWT's airtight seal can contribute to periwound skin breakdown, either through adhesive-related skin stripping at dressing changes or through moisture trapped beneath an imperfect seal — using skin barrier products around the wound margin before drape application, and careful, non-aggressive adhesive removal technique at dressing changes, both directly address this recognized risk.
Fistula Formation Is a Rare but Serious Concern in Specific Contexts
In wounds located near the bowel or other hollow organs, NPWT has been associated in rare cases with fistula formation, a serious complication that has led to more cautious use guidelines in abdominal wounds with any proximity to bowel — this specific risk profile is why NPWT use in complex abdominal wounds generally involves more conservative technique and closer surgical team involvement than its use in more straightforward extremity or pressure wounds.
Conclusion
NPWT's complication profile extends well beyond simple seal failure to include bleeding risk, retained foam fragments, periwound skin issues, and, in specific anatomical contexts, rare but serious risks like fistula formation — a fuller picture that supports appropriate monitoring rather than treating the therapy as complication-free once properly initiated. Facilities providing NPWT depend on reliable wound care supplies and disciplined protocol adherence to manage this complication profile safely.
