Hyperbaric Oxygen Therapy for Necrotising Soft Tissue Infections
Necrotising soft tissue infections (NSTIs) are rapidly progressive, life-threatening infections that destroy skin, fat, and muscle tissue. Necrotising fasciitis, one of the most severe forms, spreads quickly and can lead to systemic shock, organ failure, and death if not treated urgently. While emergency surgical debridement and intravenous antibiotics are the mainstays of treatment, Hyperbaric Oxygen Therapy (HBOT) can serve as an important adjunctive therapy to improve tissue survival, limit bacterial spread, and support patient recovery. HBOT delivers high concentrations of oxygen to affected tissues, enhancing immune response and inhibiting anaerobic bacterial growth in hypoxic environments.
Understanding Necrotising Soft Tissue Infections
NSTIs typically occur after trauma, surgery, burns, or puncture wounds. Common causative bacteria include Streptococcus pyogenes, Clostridium species, and mixed aerobic and anaerobic flora. Risk factors include diabetes, immunosuppression, obesity, and peripheral vascular disease. The infection spreads rapidly along fascial planes, often outpacing visible skin changes. Early symptoms may include severe pain, swelling, redness, and fever. As the infection progresses, blisters, skin discoloration, foul-smelling discharge, and systemic symptoms like shock can develop. NSTIs require immediate surgical intervention to remove necrotic tissue and halt the spread of infection.
How HBOT Supports Treatment
HBOT is not a replacement for surgery or antibiotics but provides critical support to improve outcomes. Therapeutic Benefits of HBOT 1. Delivers Oxygen to Hypoxic Tissue Infected tissues often have poor blood supply, limiting oxygen availability. HBOT dissolves oxygen directly into plasma, improving tissue oxygenation. 2. Inhibits Anaerobic Bacterial Growth Many NSTI pathogens, including Clostridium species, thrive in low-oxygen environments. HBOT creates conditions that suppress bacterial proliferation. 3. Enhances Immune Function High oxygen levels improve white blood cell activity, helping the body fight infection more effectively. 4. Supports Tissue Healing HBOT promotes angiogenesis and collagen synthesis, helping to preserve viable tissue and support wound repair after surgical debridement.
HBOT Within a Multidisciplinary Care Pathway
Management of NSTIs involves:
- Urgent surgical debridement to remove necrotic tissue
- Broad-spectrum intravenous antibiotics
- Intensive care support for systemic complications
- HBOT as an adjunct to improve tissue oxygenation and reduce bacterial proliferation
The number of HBOT sessions varies based on severity, patient response, and extent of infection. Treatment is typically initiated as soon as possible after surgical stabilization.
HBOT Availability in the UK
In the UK, patients with NSTIs are managed in acute hospital settings, often in collaboration with vascular or plastic surgery teams, infectious disease specialists, and hyperbaric medicine centres. Accredited HBOT facilities provide structured treatment under close medical supervision, following established clinical protocols.
Clinical Outcomes and Recovery
When integrated with prompt surgery and antibiotic therapy, HBOT may:
- Reduce the extent of tissue loss
- Limit progression of infection
- Support faster wound healing
- Improve overall survival rates
- Enhance functional recovery of affected limbs
Early intervention is critical, as NSTIs progress rapidly and delays in treatment can have devastating consequences.
FAQs About Necrotising Soft Tissue Infections and HBOT
HBOT is used as an adjunct in severe or high-risk cases, not as a standalone therapy.
Early initiation after surgical debridement is most effective in improving tissue oxygenation and inhibiting bacterial growth.
While not guaranteed, HBOT can help preserve viable tissue and improve the likelihood of limb salvage.
Yes. HBOT is delivered under specialist supervision with careful monitoring, even in intensive care settings.
HBOT supports surgical and antibiotic treatment but does not replace them; prompt surgery and antibiotics remain essential.
Conclusion
Necrotising soft tissue infections, including necrotising fasciitis, are medical emergencies with high morbidity and mortality. Hyperbaric Oxygen Therapy provides a valuable adjunctive tool by enhancing tissue oxygenation, inhibiting anaerobic bacterial growth, and supporting immune function and healing. When integrated into a multidisciplinary care pathway with urgent surgery and antibiotics, HBOT can help limit tissue loss, improve survival, and support functional recovery in patients facing these aggressive infections.