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Comprehensive and Detailed Explanation:

An ABI between 0.5 and 0.8–0.9 typically allows reduced or modified compression rather than absolute contraindication, provided there is no critical ischemia or rest pain. Therapeutic compression remains the cornerstone of venous ulcer treatment, but pressure levels are adjusted (often 20–30 mmHg or supervised short-stretch systems) and the limb is monitored closely for ischemic symptoms. Complete avoidance of compression when mild arterial disease coexists frequently results in failure to heal. High uncontrolled pressure risks tissue damage. Non-therapeutic stockinette provides no meaningful venous support. Patient Management domain includes safe application of compression therapy. The specialistmust interpret vascular studies, select the appropriate compression class, educate the patient on warning signs, and reassess frequently, especially during the first days of therapy.