Development and Application of a Decision-Making Aid Tool for Amputation Surgery in Diabetic Foot Patients Based on the Ottawa Decision Support Framework

Inclusion Criteria: * Diabetic foot ulcers with Wagner grade 4 or higher gangrene. Diabetic foot ulcers with Wagner grade 3 accompanied by severe infection or systemic symptoms; severe local infections, or chronic osteomyelitis causing functional impairment of the limb. Patients with lower extremity vascular disease showing progression despite systemic treatment. IWGDF stage 3 severe infections (characterized by loss of protective sensation or peripheral arterial disease, with at least one of the following: history of foot ulcer, lower limb amputation, or end-stage renal disease). Exclusion Criteria: * History of psychiatric disorders with inability to cooperate during communication. Concomitant severe complications.