Abstract:Objective To explore the effect of wound foundation preparation procedure therapy of debridement, dressing change, negative pressure drainage, and platelet-rich plasma therapy in chronic refractory wounds.Methods The data of 83 patients with chronic refractory wounds who were admitted to the hospital from May 2017 to May 2021 were retrospectively analyzed, and they were divided into debridement and dressing group (n = 25 cases), negative pressure drainage group (n = 35 cases), and platelet-rich plasma group (n = 23 cases) according to different treatment methods. The wound healing time, percentage of patients with complete wound healing, clinical efficacy, difference of visual analogue scale (VAS) before and after treatment, wound healing quality score (VSS), difference of wound infection indicators before and after treatment, wound bacterial positive rate, and recurrence were compared among the three groups.Results The wound healing time in the platelet-rich plasma group was shorter than that in the debridement and dressing group and the negative pressure drainage group (P < 0.05). There was no significant difference in the percentage of patients with complete wound healing between the platelet-rich plasma group, the debridement dressing group and the negative pressure drainage group (P > 0.05). There was no significant difference in the total effective rate between the platelet-rich plasma group, the debridement dressing group, and the negative pressure drainage group (P > 0.05). The difference of VAS score before and after treatment in the platelet rich plasma group was higher than that in the debridement and dressing change group and negative pressure drainage group (P < 0.05), and the VSS score in the platelet rich plasma group was lower than that in the debridement and dressing change group and negative pressure drainage group (P < 0.05). The difference of C-reactive protein (CRP) and white blood cell count (WBC) in platelet rich plasma group before and after treatment were higher than those in debridement and dressing change group and negative pressure drainage group (P < 0.05). The positive rate and recurrence rate of wounds in the platelet-rich plasma group were lower than those in the debridement and dressing group and the negative pressure drainage group (P < 0.05).Conclusion Compared with debridement, dressing change and negative pressure drainage, platelet-rich plasma used for wound-base preparation, and procedural treatment of patients with chronic refractory wounds can accelerate wound healing, reduce pain, improve wound healing quality, and reduce inflammatory responses.