Skin biopsy is widely used in clinic.Compared with round cutaneous punch,the sawtooth cutaneous punch is surpassingly better in some aspects,i.e.smaller diameter,easier operation,etc.

• 本文介绍将皮肤活检圆形钻孔器改造成圆形锯齿带内套针型钻孔器,并就两种钻孔器的技术数据,操作及优点做了阐述。