重症新冠患者隔离病房物表和空气污染调查及消毒策略

Investigation and sensory control of surface and air pollution in isolation ward of severe COVID-19 patients

目的评价新冠病毒奥密克戎变异株感染重症患者重症加强治疗病房隔离病房消毒措施效果。方法参考新冠病毒奥密克戎变异株感染重症患者流行病学及核酸样本结果资料,使用物体表面采样法对其居住的隔离病房环境进行核酸采样,并行荧光PCR法检测病毒核酸Ct值;采用湿壁气旋采样器对气溶胶进行采集,并行荧光PCR法检测病毒核酸Ct值。结果日常消毒前、气管镜下行气管切开后患者病房物体表面以及空气采样均发现有新冠病毒阳性样本。日常消毒后患者病房物品表面及空气未发现新冠病毒阳性样本。结论医院日常消毒措施可以达到新冠病毒消毒的效果,提示患者行气管切开、支气管镜等有创操作后病房内物品表面尤其是距离气管切开较近的2 m范围内和气管切开处空气是消毒的重点环节,需要引起重视。

Objective To evaluate the effect of disinfection measures in the isolation ward of ICU in severe patients infected with the Omilkerong variant of the new coronavirus,and to optimize the infection control measures.Methods Referring to the patient's epidemiological and nucleic acid sample data,nucleic acid sampling was performed on the isolated ward environment by surface sampling method,and the nucleic acid Ct value of virus was detected by parallel fluorescence PCR method.The aerosol was collected by a wet-wall cyclone sampler,and the nucleic acid Ct value of the virus was detected by parallel fluorescence PCR.Results Before daily disinfection,SARS-CoV-2 positive samples were found on the surface of the patient's ward and air sampling after the tracheoscopic tracheostomy.No positive samples of SARS-CoV-2 were found on the surface of articles and air in the patient's ward after daily disinfection.Conclusion The daily disinfection measures of the hospital can achieve the effect of SARS-CoV-2 disinfection,which suggests that the surface of the articles in the ward after invasive operations such as tracheostomy and tracheoscopy,especially within 2 meters of the tracheostomy and the tracheostomy,is the key part of disinfection,which needs to be paid attention to.