Native collagen matrix plus PHMB antimicrobial in hard-to-heal diabetic foot ulcers: results from the PREPARE randomised controlled trial.
Hard-to-heal diabetic foot ulcers are a serious complication of diabetes that can lead to amputation if they don't close. This study tested a new treatment called PCMP, which is a purified collagen matrix (a scaffold that supports new tissue growth) combined with an antimicrobial called PHMB, added to standard wound care. In a randomized controlled trial across 25 US sites, 170 patients with hard-to-heal diabetic foot ulcers were assigned to receive either PCMP plus standard care or standard care alone. After 12 weeks, complete wound closure occurred in 42% of patients receiving PCMP plus standard care compared to 27% receiving standard care alone—a difference of about 15 percentage points. The average reduction in wound area was also greater with PCMP (75% vs 58%). No adverse events were attributed to PCMP, suggesting it is safe. This means adding PCMP to standard care may help more hard-to-heal diabetic foot ulcers close, but the study had limitations: it was relatively small and only included patients in the US, so results may not apply to everyone. Talk to your doctor to see if this treatment might be right for you.
Key takeaways
- In a 170-patient trial, 42% of hard-to-heal diabetic foot ulcers healed completely with PCMP plus standard care, versus 27% with standard care alone.
- PCMP is a purified collagen matrix plus an antimicrobial (PHMB) that supports tissue regrowth and reduces infection risk.
- The average wound area reduction was 75% with PCMP versus 58% with standard care, showing faster healing progress.
- No side effects were linked to PCMP, indicating it is generally safe when added to standard wound care.
- If your DFU has not healed with standard care, ask your doctor whether a collagen matrix product like PCMP could help.
- This treatment is not yet widely available in China; discuss with specialists at Chinese DFU centres about similar advanced options.
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This content summarizes published medical research for educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making treatment decisions.
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Editor's note
Think of a hard-to-heal diabetic foot ulcer like a stubborn pothole that keeps crumbling no matter how many times you patch it—PCMP acts like a strong new foundation that helps your body rebuild the road from the inside out, while the antimicrobial keeps infection from undoing the work. If you've been told your wound won't heal or that amputation is your only option, this research offers real hope: adding PCMP to standard care helped 15% more wounds close completely, meaning more people avoided surgery. While PCMP itself may not be routinely used in China yet, many top Chinese DFU centres do offer similar advanced collagen-based therapies and comprehensive wound care. As an international patient, you can ask Chinese specialists whether they use collagen matrices or other advanced treatments, and feel empowered to seek a second opinion before agreeing to amputation.