ObjectiveTo evaluate the high-level disinfection effect of flexible endoscopes in the Endoscopy Center of the First People’s Hospital of Longquanyi District of Chengdu, explore the key links of flexible endoscope cleaning and disinfection, and provide theoretical guarantee and technical support for the next step of the endoscope center work.MethodsWe sampled and monitored the lumens, water and air injection ports and biopsy ports of 19 flexible endoscopes after high-level disinfection in the Endoscopy Center of the First People’s Hospital of Longquanyi District of Chengdu. A total of 307 specimens were collected from 108 flexible endoscopes. We compared the disinfection effects of different flexible endoscopes and different sampling sites, and compared the microbial detection status of different flexible endoscopes.ResultsThe qualified rates of disinfection of gastroscopes, colonoscope and duodenoscopy were 79.22%, 86.21% and 100.00%, respectively, and the difference was not statistically significant (P=0.721). The qualified rates of disinfection of the endoscopic lumen, water and air injection port and biopsy port were 87.04%, 93.00% and 94.95%, respectively, and the difference was not statistically significant (χ2=4.585, P=0.101). The qualified rates of the lumen, water and air injection port and biopsy port of gastroscope, colonoscope and duodenoscope were 84.42%, 93.10%, 100.00%, 92.96%, 92.59%, 100.00%, 94.29%, 96.30%, 100.00%, respectively. There was no statistically significant difference in the disinfection effect of various parts of different flexible endoscopes (P>0.05). Bacteriological identification showed that of the 28 specimens with excess bacteriological standards, 16 gram-positive bacteria (57.1%), and 12 gram-negative bacteria (42.9%) were found.ConclusionThe cleaning and disinfection effect of flexible endoscopes has certain defect. Endoscope should be treated in strict accordance with the technical specifications for cleaning and disinfection of the flexible endoscope to further improve the disinfection effect of the flexible endoscope.
Objective To compare germicidal effect of three disinfectants acting on frequently-touched surfaces in Intensive Care Unit (ICU) at different time points after disinfection so as to put forward the reasonable disinfection method and interval before the next disinfection. Methods We wiped the four frequently-touched surfaces in ICU with disinfectant containing acidic electrolyzed oxidizing water (EOW) from the building system of hospital, disinfectant wipes, and 500 mg/L chlorine respectively. The culture samples were collected from the surfaces before wiping, and 10 minutes, 30 minutes, 1 hour, 2 hours and 4 hours after wiping respectively. The bacterial clearance rate and the qualified rate of bacterial colony counts on the surfaces were compared among the three different disinfectants at different time points after disinfection. Results The bacterial killing rate of three methods for disinfection of object surfaces decreased with the passing of time. The bacterial killing rate of EOW from the building system of hospital was lower than that of the other two methods at all five time points after disinfection (P< 0.05). The bacterial killing rate at hour four after disinfection using chlorine-containing disinfectant and disinfectant wipes was higher than 90.0%. The qualified rate of bacterial colony counts on the surfaces at 10 and 30 minutes after disinfection among the three groups was not significantly different (P>0.05). The qualified rate of bacterial colony counts on the surfaces disinfected by EOW from the building system of hospital was lower than that in the other two groups at the other three time points (P<0.05), and it was totally unqualified at hour four after disinfection. Conclusions The germicidal effect of EOW from the building system of hospital is inferior to chlorine disinfectant and disinfectant wipes. Moreover, the surface can be easily recontaminated after disinfection. It is suggested that EOW should be used in ICU every other hour. and the other two disinfection methods should be used every two hours.
Endoscopic retrograde cholangiopancreatography is one of the main methods for the diagnosis and treatment of biliary tract and pancreatic diseases. Compared with other digestive endoscopes, duodenoscopy has a special structure. Since the outbreaks of nosocomial infections caused by the transmission of multidrug-resistant organism through duodenoscopy in 2010, the reprocessing and design of digestive endoscopes represented by duodenoscopy have faced new challenges. This article reviews the international advances in duodenoscopy reprocessing in the past 10 years including the structural characteristics of duodenoscope, related infection outbreak cases, outbreak control measures, and the use of disposable duodenoscopy, so as to provide guidance and reference for the duodenoscopy reprocessing and related nosocomial infections prevention and control work in China.
The coronavirus disease 2019 (COVID-19) epidemic has had a serious impact in the world. In the absence of vaccines and therapeutic drugs, disinfection has become an important technical means to block the spread of the virus. By analyzing the characteristics of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), we studied a series of disinfection technologies for COVID-19. During the outbreak of COVID-19, Jinan Second Center for Disease Control and Prevention disinfected the houses of the cases to be investigated in a community. The effectiveness of the disinfection technology was verified through the process of disinfection preparation, sampling before disinfection, field disinfection, sampling after disinfection and evaluation of disinfection effect. Compared the data before and after disinfection, the killing rate of the total bacterial colonies in the air and on the surface of the object was more than or equal to 90%, and no SARS-CoV-2 was detected after disinfection. The results show that the disinfection effect of the disinfection technology meets the standard. Finally, through the analysis of the wrong way of disinfection and the harm of over disinfection, the importance of scientific disinfection and precise disinfection are emphasized, and the research has a good guiding value for prevention and control of the epidemic.
ObjectiveTo 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. MethodsReferring 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. ResultsBefore 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. ConclusionThe 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.
ObjectiveTo study the effect of PDCA cycle model on the standardization of the application of common disinfectants, in order to promote the management level of hospital disinfection. MethodsBy questionnaire and observation, the study was to learn the knowledge and its application in medical workers on common disinfectants. Based on the results, we tried to regulate effective preventive measures and carry out continuous improvements. ResultAfter the implementation of PDCA cycle model, the awareness rate of the medical staff on disinfection and the application accuracy of disinfectants were significantly increased (P<0.05). ConclusionThe implementation of PDCA cycle model can improve nosocomial infection management level effectively, ensure medical quality management and patients' safety, which is an effective way of management to reduce the rate of nosocomial infection.
With the development of medical diagnosis and treatment technology, ultrasound examination has been widely used in clinical practice, but it also faces certain safety hazards. If the ultrasound probe is not effectively disinfected after use, it may be contaminated by pathogenic bacteria transmitted from blood, mucous membranes, genital or rectal secretions, thus becoming a carrier for the transmission of pathogenic bacteria among patients. In addition, the frequent use of ultrasound probe and coupling agent is also an important factor affecting the occurrence of hospital infections. Multiple studies at home and abroad have shown that incomplete cleaning and disinfection of medical ultrasound probe can lead to hospital infection incidents, thereby affecting patient safety and medical quality. Exploring effective disinfection methods and disinfection effects of ultrasound probe is of great significance for hospital infection prevention and control. Therefore, this article provides a review of research related to disinfection of medical ultrasound probe.
Objective To investigate the current situation of sterile supply management in primary healthcare institutions in Pudong New Area of Shanghai, analyze the existing problems, and provide a scientific basis for formulating and implementing follow-up improvement measures. Methods The primary healthcare institutions in Pudong New Area were surveyed from June to July 2024. The contents of the questionnaire included the nature of the institution, sterile supply mode, personnel, facilities and equipment configuration, quality monitoring and sterile supply management. Results A total of 71 valid questionnaires were collected, including 25 public institutions and 46 non-public institutions; 29.6% used the sterile supply mode outside the hospital, and 70.4% used the sterile supply mode inside the hospital. In primary healthcare institutions with in-hospital sterile supply mode, part-time staff accounted for 46.1%, staff under the age of 40 accounted for 69.5%, professional qualification holding rate was high (94.3%), and their education was mainly junior college (60.3%). Healthcare institutions were all equipped with steam sterilizers, and the configuration rate of cleaning and disinfection machines (92.0%) were high, but the configuration rate of water treatment and drying equipment (70.0%), information traceability system (48.0%) and low-temperature sterilizers (10.0%) were low. Disinfection and sterilization quality monitoring had been widely carried out (96.0%), but the cleaning quality monitoring rate was low (88.0%). The implementation rate of multiple requirements exceeded 96%, but the utilization rate of information traceability system was low (36.0%). The proportion of primary healthcare institutions with out-of-hospital sterile supply mode that conducted quality monitoring, requested quality reports and carried out on-site inspection on the goods provided by the service provider were less than 80%. The proportion of healthcare institutions with full-time personnel, contaminated equipment collection and temporary storage room and sterile goods handover and distribution room did not exceed 80%, and the utilization rate of information traceability system was also less than 50%. Conclusions There are still deficiencies in personnel allocation, equipment and facilities, quality monitoring and system implementation of sterile supply management in primary healthcare institutions in Pudong New Area.
ObjectiveTo evaluate the evidence of the experience with medical sewage treatment procedures in medical institutions in China. MethodsDatabases including CNKI, WanFang Data, PubMed, Web of Science, and EBSCO were electronically searched to collect studies on the medical sewage treatment process, flow, and specifications in medical institutions in China. We used the quality evaluation system to classify and grade the experiences based on the principles and methods of evidence-based science and performed a descriptive analysis. ResultsAfter the SARS pandemic in 2003, China systematically established and standardized the technical criteria of medical sewage treatment and discharge. Moreover, a prevention system for the epidemic using medical sewage was constructed, which guaranteed that the quality of medical sewage treatment and discharge would meet the criteria and protect the citizens, and the technical specifications of medical sewage treatment would progress and increase strictly. At present, medical sewage treatment in medical institutions in China was based on mechanical and biological methods, and disinfection was mainly performed using chlorine and its compounds, ozone, and ultraviolet light. ConclusionThe COVID-19 pandemic requires a higher quality of medical sewage treatment and discharge criteria for medical institutions in China. To meet these criteria, all medical institutions in China should check, replace, and update their old facilities; strengthen personnel training and effectively ensure the quality of medical sewage treatment.
Objective To provide the evidence for anti-epidemic command and developing response plan through investigation on prophlactical disinfection in Deyang, the worst-hit areas after Wenchuan earthquake. Methods We used convenient sampling together with the report forms and the self-made questionnaire to collect information from 107 villages and 17 settlement spots for the disaster victims in 25 towns in Deyang disaster area. Results There were a total of 6 kinds of disinfectant, including the chlorine disinfectant, 2 kinds of peroxide disinfectant and 2 other types of disinfectant, which were delivered the Deyang disaster area through the National amp; Province CDC system allocation or the None-Goverment Organization donation. From May 17 to June 9, the large-scale preventive disinfection was carried out in the disaster area, covering tap water, the restroom and the latrine pit, trash, environment and sewage. All personnel who conducted the disinfection for prevention and public health in the villages and towns received the technical training for disinfection. Conclusion Various disinfectant types and difference specifications cause trouble in the training of manpower and the use of disinfectant. Preventive disinfection in the most serious disaster areas is better than in serious disaster areas. The main channel of obtaining the disinfectant is through the National amp; Province CDC. The daily-report system of the disinfected areas may monitor the progress of disinfectant use. The suitable disinfection may prevent the public health secondary disaster and protect the environment effectively.