Impact of Removable Cast Walker Design on Usability for Patients With Diabetic Foot Ulcers

Inclusion criteria

• presence of a full thickness plantar (forefoot) diabetic foot ulcer ≥1cm2 that is being treated on an outpatient basis with a University of Texas wound classification of 1A-C or 2 A-C;
• self-reported ability to walk for at least two continuous minutes at a self-selected speed
• confirmation of the presence of diabetic peripheral neuropathy as identified by failure to detect a 10 gram Semmes Weinstein Monofilament on either foot at one of four sites tested (1st, 3rd, 5th metatarsal heads, and plantar surface of hallux) OR a vibration perception threshold value of 25 or more at either hallux.

Exclusion criteria

• lower extremity amputation more proximal than transmetatarsal on either limb
• chronic kidney disease stage 4 or higher (i.e., currently undergoing dialysis or eGFR<30 within last 60 days)
• active Charcot neuroarthropathy
• severe peripheral arterial disease (non-palpable pulse at posterior tibia and dorsalis pedis arteries, and an ankle brachial index<0.7)
• gait/balance disturbance not attributable to diabetes (e.g. neuromuscular disease or cerebrovascular vascular accident)
• current or previous (within past year) use of an ankle-high RCW or of a contralateral lift to offset an RCW-induced LLD