What degree of edema corresponds to a 6-mm deep indentation?

A 6-mm deep indentation is characteristic of a 3+ degree of edema. Edema is typically assessed using a grading scale based on the depth of the indentation left after pressing on the swollen area of the skin.

In this grading system, the degree of swelling and the time it takes for the indentation to rebound or return to normal provides insight into the severity of the edema. A 1+ edema is identified by a slight indentation of 2 mm or less, a 2+ edema corresponds to an indentation of 3-4 mm, and a 4+ edema involves an indentation of more than 8 mm with a prolonged time to rebound.

Therefore, a 6-mm indentation aligns perfectly with the characteristics of a 3+ edema, making it the correct answer for this question. Understanding these grading scales is crucial for assessing fluid retention and guiding treatment effectively in clinical practice.