Objective To observe and analyze the clinical effect of drychemistry and urine sediment. Methods This study selected 150 patientsin our hospital from January 2022 to June 2022, divided into threegroups, experimental group of 50 patients with routine urine test usingdry chemical method, observation group of 50 patients with urine routinetest, the control group of dry chemistry method and urine sediment, andthe detection of the index of patients in urine routine test. Results The comparison of each index in the experimental group and theobservation group with routine urine test was less than that of urineroutine test in the control group using the combined method of drychemistry and urine sediment; the misdiagnosis rate in the experimentalgroup with a routine urine test using dry chemistry was $8\%$ , the missed diagnosis rate was 14%,the total error rate was 22%; the misdiagnosis rate in the observationgroup using the routine urine test was 10%, the missed diagnosis ratewas ${18}\%$ , the total error ratewas ${28}\%$ ; the misdiagnosis rateof the control group with routine urine test using combined drychemistry and urine sediment was 2%, the missed diagnosis rate was 2%,the total error rate was 4%, the total error rate of the experimentalgroups with routine dry chemistry urine testing and the observationgroups with routine urine sediment testing was greater than that of thecontrol group with routine urine testing using combined dry chemistryand urine sediment, the statistical significant difference wassignificant $\left({P<{0.05}}\right)$ . Conclusion After the active cooperation ofrelevant researchers and patients, the clinical effect observation ofurine routine test shows that the combination of dry chemistry and urinesediment is the best clinical effect.

Objective To study and improve medical equipment fault diagnosis techniques by utilizing system state detection methods to quickly and accurately diagnose faults in medical equipment without schematics, thereby enhancing the efficiency and accuracy of equipment maintenance. Methods This study employed the system state detection method, using online testers and digital oscilloscopes to establish a system state database for the equipment. The study involved 20 common medical devices from a hospital, including blood oxygen monitors and laminar flow fan frequency converters. When equipment failures occurred, traditional fault localization methods were first used to narrow the fault range to the board level. Subsequently, online testers and digital oscilloscopes were used for component comparison testing, combined with previous successful cases for fault diagnosis. Results Among the 20 medical devices, 18 were successfully diagnosed and repaired, achieving a fault diagnosis accuracy rate of 90%. Specific cases included successfully eliminating ADC chip faults in the PM9000 monitor's blood oxygen board and E2PROM faults in the laminar flow fan frequency converter. By establishing a system state database and case database, the efficiency of equipment fault diagnosis was significantly improved, with the average diagnosis time reduced by 30%. Conclusion System state detection can effectively enhance the accuracy of medical equipment fault diagnosis and should be further promoted to optimize maintenance management.

In order to improve the comprehensive service capabilities of medical device inspection and testing laboratories, the inspection and testing business activities are empowered by digital means, and complete the digitization of the entire lifecycle of laboratory business. This article proposed a construction idea and design plan for the digitization of provincial medical device inspection institutions laboratories, designed the design principles, technical routes, and architecture of digital laboratories, constructed application scenarios for business and digital capabilities, strengthened the quality system of inspection and testing business, and utilized risk monitoring analysis and application of daily commissioning, supervision sampling, registration inspection, rapid evaluation, and defect/warning/recall to better serve supervision and enterprises.

Surface water is an indispensable and important resource in human life and production. However, the existence of trace metal elements in surface water poses a potential threat to the safety of water quality. Therefore, it is important to perform accurate and rapid monitoring of trace metal elements in surface water. This article reviews the application of ICP-MS in monitoring trace metal elements in surface water, analyzes the challenges and countermeasures in its application process, and provides accurate data reference for the comprehensive development of surface water protection work. Reference for the comprehensive development of surface water protection work.

The quality of urban sewage discharge affects the protection of urban water resources, ecological environment and so on, and has an impact on urban economic development and civilization construction. Therefore, it is very important to do a good job in water quality monitoring and management of drainage pipe network. This paper briefly describes the importance of water quality monitoring and water quality management, analyzes the factors that affect the quality of water quality monitoring, including human causes and monitoring equipment, and puts forward measures to improve the quality of water quality monitoring results. Finally, it puts forward measures such as building an information management system of drainage pipe network and perfecting the water quality monitoring management system to ensure the quality of urban sewage discharge.

Objective To understand the water quality and health status of swimming pools in Banan District of Chongqing, and to provide scientific basis for further strengthening the health management of swimming places, so as to ensure the health of swimming enthusiasts. Methods The total bacterial count and coliform microbial index of swimming pool water in Banan District of Chongqing were monitored. Results A total of 384 swimming pool water samples were monitored in Banan District of Chongqing from 2018 to 2022, and the overall qualified rate was ${97.12}\%$, the lowest qualified rate was ${90.70}\%$ in 2020, and there was no significant difference in 5-year qualified rate $\left({{\chi }^{2}= {6.395}, P >{0.05}}\right)$. There was no significant difference in the qualified rate of microbial detection in swimming pool water between different seasons $\left({{\chi }^{2}= {4.899}}\right.$, $P >{0.05})$. There was significant difference in the qualified rate of microorganism monitoring in swimming pool water of different types of swimming pool venues $\left({{\chi }^{2}= {17.361}, P <{0.01}}\right)$. Conclusion The microbial detection of swimming pool water in Banan District of Chongqing from 2018 to 2022 is generally good, but there are still some unqualified samples. It is necessary to strengthen the supervision and management of microorganism detection in swimming pool water and relevant technical guidance.

Objective To investigate the effects of enrofloxacin andciprofloxacin residues in hot processed shrimp and to provide referencefor dietary risk assessment. Methods The shrimp (Penaeus indicus) afterdrug administration was selected as raw material, and a detection methodbased on RP-HPLC-FLD was established. The shrimp was processed by twohot processing methods: boiling and drying. The effects of water-shrimpratio (proportion of water to shrimp), boil holding time, dryingtemperature and drying time on residual concentrations of enrofloxacinand ciprofloxacin in shrimp were evaluated. Results During the boilingprocess, the residual concentrations of enrofloxacin and ciprofloxacinin shrimp decreased with the increase of water-to-shrimp ratio andboiling retention time, and the residual concentrations reached theminimum when the water-to-shrimp ratio was 5 . Under this condition, theeffect on the residual concentrations was significantly reduced afterthe boiling retention time reached ${20}\mathrm{\;{min}}$ . During the dryingprocess, the residual concentrations of enrofloxacin and ciprofloxacinincreased with increasing drying temperature and remained basicallyunchanged between 150 and ${180}^{\circ }\mathrm{C}$ . When thedrying temperature was set at ${150}^{\circ }\mathrm{C}$ , the residualconcentration increased with the increase of drying time and remainedbasically unchanged between 5 and 8 min. Studies have shown that boilingcan significantly reduce the residual concentrations of enrofloxacin andciprofloxacin in shrimp, while drying can cause the residualconcentrations to increase on the basis of boiling. The overallprocessing factor of enrofloxacin and ciprofloxacin was less than 1 ,indicating that the residual concentrations of enrofloxacin andciprofloxacin in dried shrimp were lower than those in raw shrimp. Conclusion The study in this paper can help processing enterprises orquality supervision departments to effectively evaluate the impact ofantibiotic residues in hot processing shrimp, and put forward relevantsuggestions on food safety.

Objective To develop a scientific method for identifyingsea sand to differentiate it from river sand. Methods Qualitative andquantitative analysis of sea sand is conducted through its sensorycharacteristics, microscopic features, chemical and physical properties,and volumetric measurement methods. Results The chemical analysis showsthat sea sand is different from river sand with high chloride content(≥0.01%) and high shell content (≥0.1%). The electrical conductivity ofsea sand is significantly higher than that of river sand. In terms ofquantitative analysis, the relative deviation of the sea sand weightcalculation method proposed in this study is ${0.25}\%\sim {0.87}\%$ , which is close tothe allowable error of $\pm {0.3}\%$ of the truck scale. Conclusion The identification method proposed inthis study can quickly and effectively distinguish sea sand, which is ofgreat significance in ensuring the safety of building materials.

The large-scale instrument sharing platform in universities is the core resource for sharing scientific and technological resources. It not only provides strong support for teaching and research in various universities, but also offers technical support to relevant enterprises and other social units. After analyzing the current large-scale instrument sharing platforms in universities, it was found that there are problems in the service process. Based on the development of service plans, the construction of experimental teams, cross institutional cooperation mechanisms, and service quality evaluation and monitoring mechanisms, a “one-stop" service system guided by "demand" was proposed to optimize the entire service process, promote the improvement of sharing benefits, and form a closed-loop management.

Objective To investigate the effect of laboratoryinformation management system applied in the quality management oflaboratory department and its impact on the accuracy of specimen testreport. Methods The 1876 specimens that were tested in the laboratorydepartment of our hospital from January 2022 to December 2023 wereincluded in the study, and were divided into two teams according to thedifferent management modes chosen for different time periods; theroutine management was implemented in the laboratory department fromJanuary 2022 to December 2022 ( $n={938}$ , included in the routine team), and the routinemanagement measures were carried out on the basis of the routinemanagement measures in the laboratory department from January 2023 toDecember 2023 ( $n ={938}$ , includedin the surveyteam), to observe the impact of adverse events, test reportsituation and management effect under different management modes. Results Comparing the incidence of adverse events (mislabeling, specimenloss, test failure) between the two teams, the surveyteam (1.81%) waslower $\left({{\chi }^{2}= {7.627}, P<{0.05}}\right)$ ; comparing the specimen test reports betweenthe two teams, the surveyteam had a higher rate of return of criticalvalues, qualified rate of test returns, accurate rate of test reports,and timely rate of critical value reports $\left({P <{0.05}}\right)$ ; Comparisonof the management effect scores of the two teams under differentmanagement modes, the management effect scores of the inspectionpersonnel during the management period were higher in the surveyteam(P<0.05).