A randomized clinical trial assessing the efficacy of single and multiple intralesional collagenase injections for treating contracted scars  

作　　者：Shuangbai Zhou Poh-Ching Tan Cheng-An Chiang Yun Xie Peiqi Zhang Qingfeng Li Kai Liu 

机构地区：[1]Department of Plastic and Reconstructive Surgery,Shanghai Ninth People’s Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai 200011,China

出　　处：《Chinese Journal of Plastic and Reconstructive Surgery》2023年第3期120-125,共6页

基　　金：supported by the National Natural Science Foundation of China(grant nos.81501678,81971848,and 82272287);Clinical Research Plan of Shanghai Hospital Development Center(grant nos.SHDC2020CR1019B and SHDC2020CR4029);Shanghai Municipal Key Clinical Specialty(grant no.shslczdzk00901);Innovative Research Team of High-Level Local University in Shanghai(grant no.SSMUZDCX20180700).

摘　　要：Background:Scar contractions caused by trauma or burns can cause secondary physical dysfunction and disfigurement.Many minimally invasive methods for scar contraction have shown limited applicability and efficacy.This study investigated the feasibility and efficacy of intralesional collagenase injections for scar contraction treatment.Methods:Patients with contracted scars who had limited joint movement and physical disfiguration for>1 year were enrolled in this single-blind,randomized clinical trial from July 2017 to February 2018 at Shanghai Ninth People’s Hospital.Collagenase was injected into the firm-contracted scar(15 U/cm^(2))three times at 4-week intervals in the multiple treatment group and once in the single treatment group,and a placebo injection was performed in the control group.Scar length and skin texture were documented at the 4-and 12-week follow-ups.The safety of the collagenase treatment was also evaluated.Results:The contracted scar was significantly elongated after both single and multiple collagenase treatments.The results showed that,compared to a one-time treatment,repeated injections were more effective at 12 weeks,with an average improvement of 26.83(15.79%).At 12 weeks,78.9% of the patients in the multiple group and 52.9%in the single group achieved significant improvement at 12 weeks.No severe adverse events were observed.Conclusion:Intralesional collagenase injection showed promising results in improving scar contraction and provides an alternative treatment for patients.

关 键 词：Contracted scar COLLAGENASE Intralesional injection Functional improvement Clinical trial 

分 类 号：R622[医药卫生—整形外科]