Phase Ⅱ Clinical Study of Human Umbilical Cord Mesenchymal Stem Cells in the Treatment of Venous Leg

The dosage range of each cm2 ulcer wound is (1～5)×10\^6. The dosage of human umbilical cord mesenchymal stem cells for the second treatment is determined according to the severity of the ulcer. Each patient is treated for 2 consecutive times, and the interval between each treatment is 3 days.

fter wound debridement, a silver ion dressing suitable for the size of the wound was cut and covered on the wound bed. Sterile gauze was covered on the silver ion dressing and fixed with adhesive tape.