Negative pressure wound therapy compared with standard moist wound care on diabetic foot ulcers in real-life clinical practice: results of the German DiaFu-RCT

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Dörthe Seidel 1, Martin Storck 2, Holger Lawall 3 4, Gernold Wozniak 5, Peter Mauckner 6, Dirk Hochlenert 7, Walter Wetzel-Roth 8, Klemens Sondern 9, Matthias Hahn 10, Gerhard Rothenaicher 11, Thomas Krönert 12, Karl Zink 13, Edmund Neugebauer 14 15

Main idea: negative pressure wound therapy was not superior to standard moist wound care in diabetic foot wounds in German clinical practice. Overall, wound closure rate was low. Documentation deficits and deviations from treatment guidelines negatively impacted the outcome wound closure.

Abstract

Objectives: The aim of the DiaFu study was to evaluate effectiveness and safety of negative pressure wound therapy (NPWT) in patients with diabetic foot wounds in clinical practice.

Design: In this controlled clinical superiority trial with blinded outcome assessment patients were randomised in a 1:1 ratio stratified by study site and ulcer severity grade using a web-based-tool.

Setting: This German national study was conducted in 40 surgical and internal medicine inpatient and outpatient facilities specialised in diabetes foot care.

Participants: 368 patients were randomised and 345 participants were included in the modified intention-to-treat (ITT) population. Adult patients suffering from a diabetic foot ulcer at least for 4 weeks and without contraindication for NPWT were allowed to be included.

Interventions: NPWT was compared with standard moist wound care (SMWC) according to local standards and guidelines.

Primary and secondary outcome measures: Primary outcome was wound closure within 16 weeks. Secondary outcomes were wound-related and treatment-related adverse events (AEs), amputations, time until optimal wound bed preparation, wound size and wound tissue composition, pain and quality of life (QoL) within 16 weeks, and recurrences and wound closure within 6 months.

Results: In the ITT population, neither the wound closure rate nor the time to wound closure was significantly different between the treatment arms. 191 participants had missing endpoint documentations, premature therapy ends or unauthorised treatment changes. 96 participants in the NPWT arm and 72 participants in the SMWC arm had at least one AE, but only 16 AEs were related to NPWT.

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