By Dr. James Ferriday, Consultant in Diabetes and Vascular Medicine ยท Category: Wound Care Science ยท Published 2 July 2026
A diabetic foot ulcer is not a wound with a complication risk. It is a limb with a deadline. Once ulceration is established, outcomes are determined less by which dressing is eventually reached for and far more by how quickly the right combination of offloading, perfusion assessment, infection control and exudate management is put in place.
The economics of hesitation
Advanced dressings carry a higher unit cost than basic dressings, and formulary pressure often pushes teams to work through cheaper options first. In a diabetic foot ulcer this sequencing logic inverts. The relevant comparison is not dressing against dressing. It is the total cost of a wound that closes in eight weeks against one that is still open at six months.
The costs of delay accumulate quietly:
- Weeks of district nurse visits, sometimes daily, for a wound making no measurable progress.
- Repeated courses of antibiotics, with the resistance and microbiome consequences that follow.
- Unplanned admissions for infection, which dominate the true cost of diabetic foot disease.
- Escalating risk of osteomyelitis and, ultimately, of minor or major amputation.
- Loss of mobility, independence and employment for the person concerned.
Set against that, the incremental cost of an advanced dressing used from week one is small.
What early intervention actually means
Early does not mean reaching for the most expensive product available. It means completing a full assessment quickly and acting on all of it at once, rather than serially.
- Assess perfusion first. Palpate pulses and measure ankle brachial pressure index or toe pressures. An ischaemic ulcer will not heal regardless of the dressing, and needs vascular referral, not another product trial.
- Offload immediately. Pressure redistribution is the highest-value intervention in a neuropathic plantar ulcer. A total contact cast or equivalent non-removable device outperforms any dressing decision. Without offloading, everything else is optimism.
- Debride thoroughly and repeatedly. Callus and devitalised tissue at the wound margin conceal the true extent of the ulcer and harbour biofilm. Sharp debridement at every review is standard, not exceptional.
- Probe for bone. A wound that probes to bone materially raises the probability of osteomyelitis and changes the pathway.
- Manage exudate and bioburden from day one. This is where dressing technology earns its place.
Where dressing technology contributes
Diabetic foot ulcers present a specific combination of challenges: variable exudate in a confined anatomical space, high infection risk, fragile periwound skin already compromised by pressure and moisture, and a dressing that must sit inside footwear or a cast without creating a new pressure point.
- AQUACELยฎ Ag+ Extraโข uses Hydrofiberยฎ Technology to gel on contact, locking exudate and bacteria into the dressing and limiting lateral spread to vulnerable periwound skin, while MORE THAN SILVERโข technology is designed to disrupt biofilm and expose organisms to the antimicrobial.
- Hydrofiberยฎ Technology conforms closely to the wound bed, which matters in the irregular, undermined cavities typical of plantar ulceration, and has been relied on clinically for more than 25 years.
- ConvaFoamโข provides low-profile protection and exudate handling where a foam is appropriate and cast or footwear space is limited.
- DuoDERMยฎ supports autolytic debridement in selected lightly exuding wounds, though it is not a first choice in infected or heavily exuding diabetic foot ulcers.
A four-week decision rule
Measure and photograph at baseline, at two weeks and at four weeks. A diabetic foot ulcer that has not reduced in area by approximately half at four weeks is very unlikely to heal on the current plan. Treat that as a hard trigger to re-examine perfusion, offloading adherence, infection status and bone involvement, and to escalate to the multidisciplinary foot team โ rather than as a reason to persevere for another month.
The argument in one line
In diabetic foot ulceration, the cheapest dressing is the one used in the wound that closes. Early, decisive, protocol-driven care โ perfusion, offloading, debridement and advanced exudate and infection management together, from the first appointment โ is what protects limbs.
Convatec Academy offers diabetic foot ulcer pathways, case studies and accredited education for multidisciplinary foot teams.