Knighton et al evaluated chronic nonhealing wounds using the Total Wound Score, which consists of 3 parts. The final score is a sum of the 3 subscores.The authors are from the University of Minnesota in Minneapolis.


Patient selection: chronic nonhealing wound from mixed etiologies (decubitus, diabetic, arterial, venous stasis, other)



(1) general wound appearance (range 0 to 32)

(2) anatomic considerations (range 0 to 27)

(3) wound measurements (range 0 to 38)


total score =

= SUM(points for all 3 subscores)



• minimum score: 0

• maximum subscore: 97

• The higher the score the more severe the wound.

• The score decreases with effective treatment with healing.


delta score =

= (previous score) - (current score)


percent change =

= (delta score) / (previous score)


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