GCC Context: UAE and Saudi Arabia rank among the highest globally for diabetic foot disease. Diabetic foot complications account for up to 40% of all non-traumatic lower limb amputations in the Gulf region. Annual foot assessment is mandatory for all diabetic patients.
Tests for loss of protective sensation (LOPS). Apply perpendicular to skin for 1–2 seconds at each of 10 standard sites. Patient must not see the foot.
Failure at 2+ sites = LOPS. Avoid bony prominences and callused skin. Avoid testing on areas with active ulceration.
Emergency presentation: Hot, swollen, red foot in a diabetic patient = Charcot until proven otherwise. Do NOT assume infection or gout without ruling out Charcot.
| Category | Features | Review Frequency |
|---|---|---|
| Low Risk (0) | No neuropathy, no PAD, no deformity | Annual |
| Moderate (1) | LOPS or PAD, no previous ulcer | Every 3–6 months |
| High Risk (2) | LOPS + PAD, or deformity, or previous ulcer | Every 1–3 months |
| Active (3) | Ulcer, infection, acute Charcot, critical ischaemia | Immediate referral |
| Grade | Description | Clinical Features | Management Focus |
|---|---|---|---|
| 0 | Pre/post ulcerative lesion | Intact skin; callus, deformity, at-risk foot | Offloading, orthotics, education |
| 1 | Superficial ulcer | Full thickness skin, not involving subcutaneous tissue | Debridement, appropriate dressing, offload |
| 2 | Deep ulcer | Penetrating to tendon, capsule, or bone; no abscess/osteomyelitis | Sharp debridement, wound swab, IV antibiotics |
| 3 | Deep + infection | Abscess, osteomyelitis, or septic joint | Hospitalisation, IV antibiotics, surgery |
| 4 | Partial gangrene | Forefoot or toe gangrene | Urgent vascular assessment, consider amputation |
| 5 | Full foot gangrene | Entire foot involved | Major amputation likely, MDT emergency |
SINBAD (Site, Ischaemia, Neuropathy, Bacterial infection, Area, Depth) — predicts outcome, guides comparison between centres.
Distributes plantar pressure across entire foot surface. Non-removable. Most evidence for neuropathic ulcer healing. Changed weekly or if wet/damaged.
Less effective due to non-compliance. Can be rendered non-removable by wrapping in cohesive bandage (iRCW). Suitable where TCC contraindicated.
Custom therapeutic footwear post-healing for prevention. Half-shoes for forefoot ulcers. Wheelchair / crutches as necessary.
| Severity | Clinical Features | Nursing Action |
|---|---|---|
| Uninfected | No symptoms or signs of infection | Wound care, offloading, glucose optimisation |
| Mild | Local infection only: ≥2 of — purulent discharge, erythema, warmth, swelling, pain. Erythema ≤2cm from wound | Oral antibiotics (Flucloxacillin or Co-amoxiclav), community follow-up 48h |
| Moderate | Local infection with erythema >2cm, lymphangitis, or deep tissue involvement (fascia, tendon, joint, bone) | Hospital admission, IV antibiotics, surgical review, daily wound assessment |
| Severe | Systemic SIRS: temp >38°C or <36°C, HR >90, RR >20, WBC >12 or <4. Sepsis possible. | Emergency admission, broad-spectrum IV antibiotics, urgent surgical debridement, ITU if septic |
GCC Alert: Gulf region hospitals report high prevalence of MRSA and ESBL-producing organisms in diabetic foot infections. Empirical cover must account for local antibiogram — always liaise with Microbiology early.
Tissue biopsy preferred over swab — surface swabs pick up colonisers, not true pathogens. Deep tissue culture is the diagnostic gold standard.
All chronic wounds are colonised. Infection = organism burden overwhelming host defences. Clinical signs (erythema, exudate, odour, delayed healing) determine infection, NOT a positive swab alone.
For MSSA. Add Vancomycin or Daptomycin if MRSA suspected or confirmed (common in GCC).
Broad G-negative + anaerobe cover. Meropenem for ESBL producers (common in GCC). Monitor renal function.
Add if fetid odour, necrosis, crepitus, or gas on X-ray (gas-forming organism — surgical emergency). Always discuss with Microbiology.
Surgical Emergency Signs: Crepitus on palpation, gas on X-ray, rapidly spreading erythema/necrosis, haemodynamic instability = necrotising fasciitis or gas gangrene — emergency debridement <6 hours.
Nurse's Role: Patient education is the most powerful preventive tool. Up to 85% of diabetic amputations are preventable through structured education and early detection.
GCC Context — High-Risk Situations: Walking barefoot at mosques, on hot pavements, beaches, or in communal areas is extremely common and significantly increases ulceration risk. Emphasise this culturally relevant risk at every consultation.
Ramadan fasting increases ulceration risk: hypoglycaemia, prolonged standing at Tarawih prayers, dehydration, and meal-timing changes all affect wound healing. Advise patients to check feet before and after prayer times. Liaise with diabetologist regarding insulin adjustment during Ramadan.
Smoking causes peripheral vasoconstriction, impairs leukocyte function, and reduces tissue oxygenation. Cessation improves wound oxygenation within weeks. Refer to cessation service — NRT and Varenicline both safe in diabetic foot patients.
Advise patients to attend ED/emergency immediately if:
Refractory Wagner grade 3–4 wounds failing standard care, especially with compromised perfusion. HBOT increases tissue pO₂, promoting angiogenesis and leukocyte bactericidal activity.
| ABI Value | Interpretation | Action |
|---|---|---|
| >1.3 | Calcified / incompressible vessels | Use toe-brachial index (TBI); value unreliable |
| 0.9–1.3 | Normal perfusion | Routine monitoring; reassess annually |
| 0.5–0.89 | Mild–moderate PAD | Vascular review; optimise CVD risk factors |
| <0.5 | Critical limb ischaemia | Urgent vascular referral; consider revascularisation |
Standard SWME test sites — apply 10g monofilament perpendicular, 1–2 sec. Failure at ≥2 sites = LOPS.
Q1. A diabetic patient has a foot ulcer penetrating to the tendon with no systemic signs. What is the Wagner grade?
Q2. What is the gold standard offloading device for neuropathic diabetic foot ulcers?
Q3. A hot, swollen, red foot with no open wound in a diabetic patient — what is the priority diagnosis to exclude?
Q4. An ABI of 1.4 is obtained in a diabetic patient. What does this indicate and what should the nurse do?
Q5. Which investigation is the gold standard for osteomyelitis diagnosis in diabetic foot?
Q6. What is the SINBAD score acronym and which score indicates high amputation risk?
Q7. A patient asks why surface wound swabs are not always useful. What is the correct explanation?
Q8. What IWGDF risk category is a patient with LOPS + previous ulcer + foot deformity?