Grade 1: Minor | Superficial wound problem: local redness or minimal drainage Conservative approach, spontaneous healing |
Grade 2: Superficial | Wound infection: positive culture Antibiotic treatment |
Grade 3: Moderate | Deep wound infection: soft tissue dehiscence without bone extension Need for drainage, debridement, or VAC |
Grade 4: Severe | Mediastinitis or mechanical sternal dehiscence with bone extension Refixation of the sternum or omentoplasty |