Continuous diffusion of oxygen improves diabetic foot ulcer healing when compared with a placebo control: a randomised, double-blind, multicentre study

Objective: The aim of this study was to assess whether continuous diffusion of oxygen improves healing in people receiving treatment for diabetic foot ulcers (DFU). Method: A double-blind, placebo control randomised study to receive either active continuous diffusion of oxygen (CDO) therapy using an active CDO device, or a fully operational placebo device without delivering oxygen. Patients were followed until closure or 12 weeks. Patients, caretakers, treating physicians and independent evaluators were blinded to the study arm. All patients received identical offloading, debridement, dressings and follow-up. Results: We enrolled 146 people with DFUs (77% male, aged 56.3±12.4 years). A significantly higher proportion (195%) of DFUs healed in the CDO arm compared with placebo (32.4% versus 16.7%, p=0.033). The time to 50% DFU closure was significantly shorter in patients that received CDO therapy (mean 18.4 versus 28.9 days, p=0.001). There were no differences in overall adverse events (p=0.66) or ulcer-re...