Treatment of Stage 3 Diabetic Plantar Foot Ulcer

Primary Offloading Strategy

The American Diabetes Association recommends using a non-removable knee-high offloading device with an appropriate foot-device interface as first-line treatment, which has the strongest evidence (high quality) for healing neuropathic plantar forefoot ulcers 1, 2, 3
A non-removable knee-high offloading device ensures adherence, which is critical since patients often fail to consistently wear removable devices 1, 2, 3

If a non-removable device is contraindicated or not tolerated, the American College of Foot and Ankle Surgeons suggests using a removable knee-high walker, but only if the patient demonstrates reliable adherence to wearing it during all weight-bearing activities 1, 4
If knee-high devices cannot be used, consider forefoot offloading shoes, cast shoes, or custom-made temporary shoes, again only with expected adherence, as recommended by the American Diabetes Association 1, 5
If offloading devices are unavailable, felted foam combined with appropriately fitting footwear can serve as third-line treatment, according to the American College of Foot and Ankle Surgeons 1, 6

If mild infection is present, a non-removable knee-high device can still be used, as stated by the American Diabetes Association 1
If moderate infection, consider a removable offloading device for easier wound monitoring, as recommended by the American College of Foot and Ankle Surgeons 1
If severe infection with purulence or deep tissue involvement, prioritize infection control with intravenous antibiotics and surgical drainage/debridement before definitive offloading, according to the American Diabetes Association 1

If conservative offloading fails after an appropriate trial, consider Achilles tendon lengthening (strongest evidence) or metatarsal head resection combined with continued offloading for plantar metatarsal head ulcers, as recommended by the American College of Foot and Ankle Surgeons 1, 5
For hallux ulcers, consider joint arthroplasty, according to the American Diabetes Association 1
For flexible toe deformities with plantar/apex ulcers on digits 2-5, perform digital flexor tenotomy (strong recommendation), as stated by the American College of Foot and Ankle Surgeons 1

Never allow the patient to walk barefoot, in socks only, or in thin slippers during treatment, as this will prevent healing, according to the American Diabetes Association 2, 4
Do not rely on patient adherence with removable devices unless you have strong reason to believe they will comply; non-removable is superior, as recommended by the American College of Foot and Ankle Surgeons 1, 2

Instruct the patient to inspect feet daily, report any temperature changes or new lesions immediately, maintain the offloading device continuously during all weight-bearing activities, and understand this is a limb-threatening condition requiring strict adherence, as stated by the American Diabetes Association 7, 8