Fig. 1

54-year-old man, diabetic foot, Wagner classification: grade 4. a Diabetic foot condition with second toe necrosis after admission. b Diabetic foot condition after absolute debridement. c Application of the simple skin stretching system and condition of the margin of the wound. d Use NPWT system simultaneously. e Diabetic wound condition after removing the NPWT system. f The condition of the wound after removing the staples and elastic band. g The wound was sutured without high tension. h 3 months after last operation