Mechanistic Insights and International Use Cases of cTOT in Wound Management
Summary
This document provides an in-depth review of continuous topical oxygen therapy (cTOT) as an effective adjunctive treatment for managing chronic and complex wounds. Chronic wounds, often caused by tissue hypoxia and impaired healing, are a growing global health concern. cTOT delivers sustained oxygen directly to the wound bed, promoting cellular metabolism, immune modulation, angiogenesis, and tissue regeneration.
Key Points:
- Mechanisms of cTOT:
- Enhances mitochondrial ATP production, fibroblast and keratinocyte function, and collagen synthesis.
- Promotes angiogenesis and extracellular matrix remodeling.
- Facilitates the transition of macrophages from pro-inflammatory (M1) to reparative (M2) phenotypes.
- Improves immune cell function and bactericidal efficacy.
- cTOT Device:
- The NATROX® O₂ system delivers continuous low-pressure oxygen (11 ml/hour) via a portable, wearable device powered by rechargeable batteries.
- Oxygen is delivered by the ODS, which is covered by a semi-occlusive dressing to maintain a wound healing environment.
- Clinical Applications:
- cTOT has been successfully used to treat various hard-to-heal wounds around the world, including diabetic foot ulcers (DFUs), vasculitis, burns, open amputation sites, calciphylaxis, surgical dehiscence, and osteoradionecrosis.
- Eight international case studies from six countries (USA; Colombia; Portugal; UK; Malaysia; South Africa) demonstrated significant clinical improvement, with complete wound closure achieved in all cases. Healing timelines ranged from 4 to 29 weeks.
- Global Relevance:
- Chronic wounds affect over 13 million people worldwide, with prevalence expected to rise due to aging populations and associated comorbidities.
- cTOT has been integrated into standard care protocols globally and is supported by evidence from randomized controlled trials and systematic reviews.
Conclusion:
cTOT is a promising, globally adaptable therapy for chronic and complex wounds. It addresses physiological barriers to healing and complements standard of care protocols. Further research is needed to optimize treatment protocols, identify ideal patient subgroups, and evaluate long-term outcomes.
The document highlights the transformative potential of cTOT in wound care, emphasizing its ability to improve healing outcomes across diverse wound types and healthcare settings.
Citation:
Windy Cole, Harikrishna KR Nair, Sagar U Nigwekar, Viviana Gonçalves, Liezl Naude, Wolmark Xiques Molina, Noel B Natoli, Andrew Camilleri
22 December 2025