An Exploratory Research on the Efficacy and Safety of Antibacterial Absorbable Dressing in Chronic Non-healing Wounds

Inclusion Criteria: * Age : 18-80 years * Wound Type : Chronic non-healing ulcers\* with no signs of healing progression for ≥1 week * Wound Area : 1-35 cm² * Infection Status : Local infection, contamination, or colonization\*\* as classified by IWII Wound Infection Staging * Wound Phase : Late necrotic stabilization phase, granulation phase, or epithelial migration phase\*\*\* * Consent : Voluntary participation with signed informed consent Exclusion Criteria: * Severe Comorbidities : Acute myocardial infarction, heart failure, hepatitis, shock, respiratory failure, or other critical conditions requiring stabilization * Uncontrolled Diabetes : Fasting blood glucose \>15 mmol/L or HbA1c \>12% * Active Wound Hemorrhage : Bleeding precluding standard wound therapy * Critical Laboratory Values : Serum albumin \<20 g/L Hemoglobin \<60 g/L Platelet count \<50×10⁹/L * Systemic Infection : Disseminated/systemic infection requiring antibiotic therapy * Malignancy : Advanced cancer patients，Current radiotherapy/chemotherapy，Malignant (cancer-related) ulcers * Untreated Burns : Full-thickness (third-degree) burns without escharotomy * Active Autoimmune Disease : Flare-up phase of autoimmune disorders * Pregnancy/Lactation : Pregnant or breastfeeding women * Allergy : Hypersensitivity to absorbable wound repair materials or polyhexamethylene biguanide hydrochloride * Non-compliance : Inability to cooperate or psychiatric disorders * Investigator's Discretion : Any condition deemed to compromise wound healing or study adherence