A clean incised wound heals by –
**Core Concept**
Wound healing is a complex process involving various cellular and molecular mechanisms. **Primary intention** healing occurs when the edges of a wound are closely approximated, such as in a clean incised wound. This type of healing is characterized by direct closure of the wound with minimal granulation tissue formation.
**Why the Correct Answer is Right**
A clean incised wound heals by **primary intention**, where the wound edges are brought together, and the healing process occurs rapidly with minimal scar formation. This process involves the activation of **platelets**, the release of **growth factors**, and the migration of **fibroblasts** to synthesize new collagen. As a result, the wound heals quickly with a minimal amount of granulation tissue.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not a recognized method of wound healing.
**Option B:** Incorrect as it refers to a type of wound closure, not a method of healing.
**Option C:** Incorrect because it is not applicable to clean incised wounds.
**Option D:** Incorrect as it is not a valid option for this context.
**Clinical Pearl / High-Yield Fact**
It's essential to distinguish between **primary** and **secondary intention** healing, as this affects treatment and prognosis. Primary intention healing is typically seen in clean, surgical wounds, while secondary intention healing occurs in wounds with significant tissue loss.
**Correct Answer:** D. Primary intention.