What is an abrasion?

An abrasion is accurately defined as an open injury to the outermost layer of the skin caused by scraping. This type of injury typically occurs when the skin comes into contact with a rough surface or object, which removes or rubs off the upper layer of skin, creating a wound. Abrasions do not penetrate deeply, affecting only the epidermis, and are usually considered superficial. They often result in minor bleeding and may be accompanied by pain and redness around the affected area.

In contrast, the other options pertain to different types of injuries or conditions. A muscle injury from impact refers to a contusion or bruise rather than an abrasion. A type of fracture in the bone specifies a completely different category of injury that involves the breakage of bone tissue. Lastly, a closed injury resulting from excessive bleeding does not relate to abrasions, as closed injuries don’t involve visible wounds on the skin and typically indicate internal bleeding or trauma. This precise definition and understanding of abrasions are essential for proper assessment and treatment in emergency medical settings.