In wound assessment, which statement about tunneling and undermining is correct, and how is their depth documented?

In wound assessment, which statement about tunneling and undermining is correct, and how is their depth documented?

• A. Tunneling is a radiographic term used to describe bone involvement.
• B. Tunneling is a narrow channel extending from the wound bed; undermining is tissue destruction under wound edges causing a hollow; depth is recorded relative to the wound margins using a clock reference and measured with a sterile probe.
• C. Tunneling is a superficial channel on the skin surface; undermining is infection around the wound; depth is never measured.
• D. Tunneling refers to depth measurement measured with a ruler.

Answer: (B)

Understanding wound assessment hinges on how tunneling and undermining are defined and documented. Tunneling is a narrow channel that extends from the wound bed into surrounding tissue. Undermining is tissue destruction under the wound edges that creates a hollow beneath intact skin. For depth, providers document relative to the wound margins using a clock-face reference (for example, describing how deep at 6 o’clock or along 3 o’clock) and measure with a sterile probe to determine how far the tunnel or undermining extends. This clock-based approach with a sterile probe gives a standardized, reproducible way to describe wound architecture and track healing over time. This isn’t a radiographic term about bone involvement, and undermining isn’t defined by infection. Depth is not measured with a ruler; the clock reference and sterile probing method are the standard.

Understanding wound assessment hinges on how tunneling and undermining are defined and documented. Tunneling is a narrow channel that extends from the wound bed into surrounding tissue. Undermining is tissue destruction under the wound edges that creates a hollow beneath intact skin. For depth, providers document relative to the wound margins using a clock-face reference (for example, describing how deep at 6 o’clock or along 3 o’clock) and measure with a sterile probe to determine how far the tunnel or undermining extends. This clock-based approach with a sterile probe gives a standardized, reproducible way to describe wound architecture and track healing over time.

This isn’t a radiographic term about bone involvement, and undermining isn’t defined by infection. Depth is not measured with a ruler; the clock reference and sterile probing method are the standard.