为了解常规胃镜清洗消毒方法对乙肝病毒ＤＮＡ（ＨＢＶＤＮＡ）的清除效果，采用聚合酶链反应（ＰＣＲ）方法对２９例乙肝病毒表面抗原（ＨＢＳＡｇ）阳性患者胃镜检查后，清洗消毒前后胃镜活检通道冲洗液进行检测，结果８份（２７６％）清洗消毒前冲洗液ＨＢＶＤＮＡ为阳性，清洗消毒后冲洗液仍有２份（６９０％）为阳性。提示：对胃镜的清洗消毒还应加强，确保其安全性 To understand the effect of routine gastroscopic cleaning and disinfection on hepatitis B virus DNA (HBVDNA), 29 patients with hepatitis B virus surface antigen (HBsAg) positive were examined by polymerase chain reaction (PCR) before and after gastroscopy Biopsy channel flushing fluid testing, the results of 8 (27  6%) before washing and disinfection of washing liquid HBV  DNA positive, after washing and disinfecting rinse liquid is still 2 (6  90%) was positive. Tip: Gastroscope cleaning and disinfection should also be strengthened to ensure its safety