FROM MY PT SCHOOL NOTES · WOUND CARE · CHAPTER 18
What Makes a Diabetic Foot Wound High Risk?
A plantar wound may continue to experience damaging load even when dressing changes are consistent.
Understand neuropathy and repetitive loading
The original notes connect diabetes to sensory, motor and autonomic neuropathy. Loss of protective sensation makes repeated loading less noticeable; motor changes can alter foot posture or pressure points; autonomic changes may affect skin integrity. Callus over a loaded metatarsal region is not a harmless finding in a high-risk foot.
Examination highlights: inspect skin and footwear; ask about prior ulcers or amputation; assess protective sensation (for example a standardized 10-g monofilament approach when trained), pulses and vascular status; evaluate deformity, movement and walking/loading patterns; and consider signs of infection. A painless foot ulcer can still threaten the limb.
Assess protective sensation and footwear
Further diabetic-foot notes: sensory testing may include 10-g monofilament and vibration assessment, complemented by motor examination of intrinsic/extrinsic muscle function, toe deformity, fat-pad displacement, callus and plantar loading. A warm, swollen, sometimes red foot in a person with neuropathy raises concern for acute Charcot neuro-osteoarthropathy; it can be relatively painless despite serious pathology. This warrants prompt medical assessment and protection/offloading rather than simply prescribing additional walking.
Foot-care reminder from class: inspect shoes, skin and between the toes, noting cracks, blisters, new pressure areas or callus. Avoid prolonged soaking and unprotected barefoot walking. Fit footwear carefully, and leave higher-risk nail or callus procedures to appropriately trained professionals. A newly warm, swollen or red neuropathic foot warrants prompt Charcot evaluation even if pain is mild.
Recognize when specialized care is needed
Offloading is not just ‘better shoes.’ For an eligible neuropathic plantar forefoot or midfoot ulcer, IWGDF 2023 recommends a non-removable knee-high device first (total-contact cast or non-removable walker). Some people with mild infection or mild ischemia may still be candidates, but severe or combined complications, drainage needs, balance/fall risk, skin inspection needs and patient tolerance change the choice. If a non-removable device is contraindicated or not tolerated, a removable knee- or ankle-high device may be considered, with emphasis on wearing it during weight-bearing activities. Different wound sites require different strategies.
Class note on total-contact casting: it redistributes plantar load and limits repetitive tissue stress, but fitting, monitoring, wound inspection and individual risk assessment matter. A device is only useful when it effectively reduces the harmful pressure and the patient can use it safely. Offloading may require revisiting gait, transfers, balance and the contralateral limb—not just the ulcerated foot.
Check your reasoning: If a patient has loss of protective sensation, is the absence of pain reassuring by itself?
No. Reduced protective sensation can allow injury to progress without the expected pain response.
Make the clinical connection
Scenario: A patient with diabetes has a plantar forefoot ulcer beneath heavy callus. A new dressing has been applied weekly, but pressure exposure and footwear are unchanged.
What is the next reasoning step?
Reasoning: Review the loading pattern, protective sensation, footwear, vascular status and appropriate specialized offloading plan. Repeated mechanical stress can obstruct healing despite consistent dressings; the clinical team should evaluate infection and ischemia concerns.
Common mistake: Assuming the dressing is the only reason a plantar wound is not improving. Remember: Treat the conditions driving tissue injury, not only the wound covering.
Current reference (separate from my class notes): IWGDF/IDSA guidance on diabetes-related foot infection. Infection is clinically evaluated using signs and symptoms and interdisciplinary assessment; an ulcer by itself does not prove infection.
Source: my General Medical / Wound Care school-notes companion, wound section(s) 7. This is for studying concepts and clinical reasoning. It does not authorize debridement, compression, dressing selection or burn care without qualified training, evaluation and current protocols.
