Noninferiority of Copper Dressings Than Negative Pressure Wound Therapy in Healing Diabetic Wounds: A Randomized Clinical Trial.
Eyal Melamed, Jihad Dabbah, Talia Israel et al.
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In 30 seconds
This randomized clinical trial compared copper oxide–impregnated dressings (COD) with negative pressure wound therapy (NPWT) in patients with type 1 or type 2 diabetes and noninfected wounds eligible for NPWT. The primary outcome was wound-size reduction, assessed blindly with 3D imaging. COD met the study’s statistical criterion for noninferiority to NPWT in wound-size reduction (p < 0.01). Wound closure occurred in 47.83% (11/23) with COD and 34.78% (8/23) with NPWT (p > 0.05); adjusted time to closure was also similar. COD was more convenient and cost 14% of NPWT ($470 compared with $3,360).
Key findings
- COD showed statistically significant noninferiority to NPWT for wound-size reduction throughout the study (p < 0.01).
- Wound closure was 47.83% (11/23) with COD and 34.78% (8/23) with NPWT (p > 0.05).
- COD was rated more convenient by patients (p < 0.001) and caregivers (p = 0.003), with shorter application time (p < 0.001).
- COD cost $470 compared with $3,360 for NPWT, or 14% of NPWT cost.
Why it matters
For noninfected diabetic wounds considered eligible for NPWT, the trial suggests that copper dressings may achieve comparable wound-size reduction while being less costly and more convenient. These practical differences may matter to patients, caregivers, and health services, although the findings apply to the population and outcomes studied and do not establish superiority in wound closure.
What to keep in mind
The trial included 23 wounds in each arm, and wound closure did not differ significantly between groups. The abstract does not report follow-up duration.