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A wound classified as an abrasion or blister with partial-thickness tissue loss is categorized as Stage II. In wound classification, Stage II encompasses injuries where there is a partial-thickness loss of the dermis. This typically presents as a shallow open sore or a blister that can be either intact or ruptured, with a red or pink wound bed that is moist.

These characteristics align with the definition of Stage II wounds, which indicates that the damage goes through the epidermis and into the upper layers of the dermis but does not extend deeper, as is the case in the later stages. Stages I and III involve either intact skin with non-blanchable redness or deeper tissue loss that affects the full thickness of the skin, respectively. Stage IV represents full-thickness tissue loss, which may include exposure of muscle, bone, or tendon. Therefore, recognizing the specific characteristics of each stage is crucial in accurately categorizing the wound type and determining the most appropriate treatment and intervention options.