Beyond Standard Dressings: When Wounds Need More
1. Negative Pressure Wound Therapy (NPWT)
♦ What It Is
♦ How It Works
- Exudate removal: Continuously removes excess wound fluid, reducing bacterial load and wound oedema
- Mechanical cell stimulation: The negative pressure mechanically deforms wound-edge cells, stimulating growth factor release and angiogenesis
- Wound contraction: Draws wound edges together, reducing wound dimensions and closing dead space
- Granulation tissue formation: Promotes rapid development of healthy granulation tissue, particularly in post-surgical and cavity wounds
♦ Clinical Indications for NPWT
NPWT is indicated for Grade 3–4 diabetic foot ulcers, post-surgical DFU wounds, deep cavity wounds, and degloving injuries. It is also used after diabetic foot amputation to prepare the wound bed for skin grafting. Contraindications include untreated osteomyelitis, malignant wounds, and wounds with exposed blood vessels requiring surgical management.
♦ Availability and Cost in India (2026)
2. Hyperbaric Oxygen Therapy (HBOT)
♦ What It Is
♦ Clinical Evidence
♦ Who Benefits Most
- Wagner Grade 3–4 DFU patients with ischaemia not amenable to surgical revascularisation
- Post-amputation wound healing where primary closure is delayed
- Radionecrosis and chronic refractory osteomyelitis (co-indications)
- DFU patients with failed NPWT who still have intact vascular supply
♦ HBOT in India: Availability (2026)
HBOT chambers are available in a growing number of Indian cities including Mumbai, Delhi, Chennai, Hyderabad, Bengaluru, and Pune, primarily in specialised hyperbaric medicine centres and select NABH-accredited hospitals. Cost: ₹3,500–₹8,000 per session. A full course of 30 sessions represents a significant investment, but it must be weighed against the cost of prolonged hospitalisation or amputation.
3. Bioengineered Skin Substitutes and Growth Factors
♦ What They Are
- Acellular Dermal Matrices (ADMs): Processed extracellular matrix (from human, porcine, or bovine sources) with natural growth factors preserved. Provides scaffolding for cell migration and neovascularisation. Examples: porcine small intestinal submucosa.
- Bilayered Living Skin Equivalents: Contain both dermal fibroblasts and epidermal keratinocytes—providing a near-complete biological skin replacement.
- Autologous Keratinocyte Sheets: Grown from the patient's own skin cells in a laboratory and applied as a living biological dressing. Costly but immunologically compatible. A prospective study (Hwang et al.) showed 78.9% complete healing in chronic DFU patients.
♦ Platelet-Rich Plasma (PRP) and Growth Factor Therapy
PRP—derived from the patient’s own blood, concentrated by centrifugation—delivers high concentrations of PDGF, VEGF, TGF-β, and EGF directly to the wound bed. These growth factors activate fibroblast proliferation, angiogenesis, and epithelialisation. PRP therapy is gaining traction in Indian centres as a cost-effective, advanced diabetic wound treatment with no risk of immunological rejection.
4. Extracorporeal Shock Wave Therapy (ESWT)
5. Nanotechnology-Based Wound Care:
Research published in Frontiers in Pharmacology (July 2025) highlights an extraordinary pipeline of wound care technology solutions for 2026.
- Zinc Oxide Nanoparticles (ZnO NPs): Potent antimicrobial and anti-inflammatory activity against polymicrobial wound biofilm, including MRSA and Pseudomonas
- Copper Carbonate Nanoparticles: Demonstrated complete wound closure in diabetic murine models by day 14, with large inhibition zones against Pseudomonas at 18.5 mm at 12 mg/mL concentrations
- Microneedle Drug Delivery Systems: Co-delivering haemoglobin-resveratrol nanoparticles and gold nanowires for simultaneous wound healing and localised blood glucose control
- Smart Hydrogels: Self-assembled hydrogels containing ginseng saponins or asiaticoside that reduce wound inflammation while enhancing VEGF production and collagen fibre organisation
