Answer :

A sterile, flexible applicator wet with saline is the tool the nurse should use to gauge the depth of the client's tunneled wound. The safest tool to use is an applicator that is flexible and sterile. The other tools are not sterile, too big, or flexible enough.

While tunneling enters tissue more deeply, undermining is less pervasive. To gauge the depth of penetration, gently probe the wound's border. A wound has developed to the point where it has created tunnels underneath the skin's surface.

These tunnels might be straight or winding, short or long, shallow or deep. Pressure ulcers that are at stages 3 or 4 may tunnel.

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