探讨不同消毒方法对超声探头消毒效果的影响

目的了解某院医用超声探头带菌状况,以及探讨不同消毒方法对超声探头的消毒效果,旨在为医用超声探头清洁与消毒提供参考依据。方法采集某三甲医院实际使用的普通超声探头和妇科经阴道超声探头标本274份,按不同采样时机分组:普通超声探头为接触患者后普通卫生纸擦拭前、普通卫生纸擦拭后、探头消毒后;经阴道超声探头为接触患者黏膜检查后且脱去一次性保护套后、探头消毒后。按不同消毒方法又分为2组:A组为消毒湿巾组(复合双链季铵盐消毒湿巾),B组为超声探头消毒器组,分别进行菌落总数计算及鉴定。结果共采集普通超声探头标本174份,其中接触患者后普通卫生纸擦拭前、普通卫生纸擦拭后、消毒后标本平均菌落数为1.61×10~4、1.57×10~3、2.41 CFU/件,3个不同采样时机平均菌落数比较,差异有统计学意义(P0.05);共采集妇科经阴道超声探头标本100份,其中接触患者黏膜且脱去一次性保护套、经消毒后平均菌落数分别为13.20、0.24 CFU/件,2个不同采样时机平均菌落数比较,差异有统计学意义(P0.05)。采用消毒湿巾和超声探头消毒器对普通超声探头进行消毒,平均菌落数分别为5、0CFU/件;对妇科经阴道超声探头进行消毒,平均菌落数分别为0.40、0CFU/件;两种消毒方法比较,差异均无统计学意义(均P0.05);超声探头消毒后均未检出致病菌。结论复合双链季铵盐消毒湿巾和超声探头消毒器对超声探头消毒效果均较好,可以推荐使用于超声诊疗室。

Effect of different disinfection methods on the disinfection of medical ultrasound probes

Objective To investigate the bacterial contamination of medical ultrasound probes in a hospital, explore the disinfection effect of different disinfection methods on ultrasound probes, and provide reference for cleaning and disinfection of medical ultrasound probes. Methods 274 specimens of common ultrasound probes and gynecolo-gical transvaginal ultrasound probes in a tertiary first-class hospital were taken and grouped according to different sampling time, common ultrasound probes were taken specimens before and after wiping with common tissue paper as well as after disinfection following touching patients; transvaginal ultrasound probes were taken specimens after removal of disposable protective sheath and after disinfection following mucosa-touching examination for patients. According to different disinfection methods, two groups were also divided:group A was disinfection wet wipes group (compound double-chain quaternary ammonium salt disinfection wet wipes), group B was ultrasound probe sterilizer group, the total number of bacteria was calculated and identified respectively. Results A total of 174 specimens of common ultrasound probes were taken, the average bacterial colonies before and after wiping with common tissue paper, as well as after disinfection following touching patients were 1.61×10⁴, 1.57×10³, and 2.41 CFU/piece respectively, there was significant difference in the average bacterial colonies at three different sampling times (P<0.05); a total of 100 gynecological transvaginal ultrasound probe specimens were taken, the average bacterial colonies of probes after removing disposable protective sheath and after disinfection following touching patients' mucosa were 13.20 and 0.24 CFU/piece respectively, there was significant difference in the average colonies between two sampling times (P<0.05). After probes were disinfected by disinfection wet wipes and ultrasound probe sterilizer, the average bacterial colonies of common ultrasound probes were 5 and 0 CFU/piece respectively, transvaginal ultrasound probes were 0.40 and 0 CFU/piece respectively, there were no significant difference between two disinfection methods (both P>0.05); no pathogen was detected after ultrasound probes were disinfected. Conclusion Both double-chain compound quaternary ammonium salt disinfection wet wipes and ultrasound probe sterilizer have good disinfection effect on ultrasound probes, which can be recommended for use in ultrasound diagnosis and treatment department.