激光汽化术与前列腺电切术治疗良性前列腺增生疗效的Meta分析

目的系统评价经尿道980nm激光汽化术与前列腺电切术(TURP)治疗良性前列腺增生(BPH)的疗效。方法收集国内外关于经尿道980nm激光汽化术与TURP治疗BPH的文献,采用Revman5.3软件进行Meta分析。结果筛选后共6篇文献符合纳入标准,总计839例,其中包括980nm激光治疗组450例和TURP组389例。Meta结果显示:和TURP组相比,980nm激光组手术时间差异无统计学意义[标准化均数差(SMD)=0.11,95%CI(-0.52,0.74),P>0.05],住院时间较短[SMD=-1.95,95%CI(-3.42,-0.48),P<0.05]及术后尿管留置时间较短[SMD=-2.64,95%CI(-3.92,-1.36),P<0.05]。980 nm激光组和TURP组在术后国际前列腺症状评分(IPSS)差异无统计学意义[加权均数差(WMD)=0.12,95%CI(-0.27,0.51),P>0.05],术后生活质量评分(QOL)评分差异无统计学意义[SMD=0.00,95%CI(-0.57,0.57),P>0.05],术后最大尿流率(Qmax)差异无统计学意义[SMD=0.06,95%CI(-0.26,0.37),P>0.05]。结论 980nm激光治疗良性BPH与经典的TURP术式相比,在住院时间和术后尿管留置时间方面有优势,远期效果无明显差异。

Curative Effect of 30% Supramolecular Salicylic Acid Combined with Yufa Spray Dressing on Moderate to Severe Scalp Seborrheic Dermatitis

Objective:To observe the clinical efficacy of 30%supramolecular salicylic acid combined with Yufa spray dressing in the treatment of moderate to severe seborrheic dermatitis(seborrheic dermatitis of the scalp,SDS).Methods:From January 2020 to December 2021,150 patients with SDS,who were treated in the Dermatology Clinic of the First Affiliated Hospital of Xi’an Medical University,were randomly divided into two groups,a treatment group and a control group,with 75 cases in each group.The treatment group was given 30%supramolecular salicylic acid combined with Yufa spray dressing on the basis of external medicine given to the control group,while the control group was given oral medicine combined with external medicine.Results:The difference in scores of erythema,scales,pruritus,and folliculitis of the treatment group before and after treatment was significant(P<0.01),indicating that supramolecular salicylic acid combined with Yufa spray dressing can relieve the symptoms of SDS.The difference in scores of erythema of the control group before and after treatment was significant as well(P<0.05),indicating that traditional antibiotics are also effective in treating SDS;however,there was no significant difference(P>0.05)in the scores of other signs and symptoms,such as scales,pruritus,and folliculitis,before and after treatment,indicating that traditional antibiotics have no obvious curative effect on SDS.After 12 weeks of treatment,the improvement in erythema,scaling,and folliculitis was significantly greater in the treatment group compared with the control group(P<0.05).Curative effect comparison showed that the total effective rate of the treatment group was 80.00%,compared with 25.67%of the control group,and the difference was statistically significant(P<0.05).Conclusion:30%supramolecular salicylic acid combined with Yufa spray dressing can significantly improve the therapeutic effect in moderate to severe SDS;the recurrence rate is lower,the course of treatment is shorted,and patients generally feel better;thus,it is a new option for the treatment of dermatitis.

Research on Multi-System Ultra-High Speed Optical Signal Access System

In view of the small transmission capacity and single signal modulation format of the existing optical transmission system, this paper proposes an ultra-high-speed optical signal access scheme based on NEL0670, which can realize the transmission of 100 G DP-QPSK, 200 G DP-16QAM and 400 G DP-16QAM signals, and realize flexible and intelligent reception of multi-system optical signals.

Genotoxic and Biological Evaluation of a Nano Silica Cross Linked Composite Specifically Used for Intra-Vas Device

The Context: Aims: To evaluate the biocompatibility and in vitro genotoxicity of a non-copper nano silica polymer modified composite for filtering-type intra-vas devices. Settings and Design: Academic research laboratory, Huazhong University of Science and Technology. Prospective experimental study. Methods and Material: Non-copper nano silica polymer modified composite rods were implanted into the back muscle of rabbits for biocompatibility evaluation. Comet assay was applied to the determination of DNA damage, while, Mutagenic activity was tested by means of Ames test using Salmonella typhimurium TA98 and TA 100 tester strains with and without metabolic activation. Statistical analysis used: qualitative and quantitative data were tested using the Chi-square test and Student’s test. Results: Only mild inflammatory reaction was observed in the surrounding tissues of the implanted nano-silica modified polymer composite in the early implantation stage, which was similar to that of the sham-operated group. The inflammatory reaction was completely disappeared after 12 weeks. No significant DNA damage (P > 0.05) were tested on the nano-silica modified polymer composite in Comet assay. In Ames test, the extracts from non-copper composite did not exert mutagenic effect on the bacterial. Conclusions: The non-copper nano silica modified composite did not exhibit in vitro genotoxicity and obvious inflammation in tissue, it would be a safe biomaterial for further clinical trial.

Image Feature Computation in Encrypted Domain Based on Mean Value

In smart environments,more and more teaching data sources are uploaded to remote cloud centers which promote the development of the smart campus.The outsourcing of massive teaching data can reduce storage burden and computational cost,but causes some privacy concerns because those teaching data(especially personal image data)may contain personal private information.In this paper,a privacy-preserving image feature extraction algorithm is proposed by using mean value features.Clients use block scrambling and chaotic map to encrypt original images before uploading to the remote servers.Cloud servers can directly extract image mean value features from encrypted images.Experiments show the effectiveness and security of our algorithm.It can achieve information search over the encrypted images on the smart campus.

Study on the COVID-19 epidemic in China's Mainland between November 2022 and January 2023,with prediction of its tendency

The prediction system EpiSIX was used to study the COVID-19 epidemic in China's Mainland between November 2022 and January 2023,based on reported data from December 9,2022,to January 30,2023,released by The Chinese Center for Disease Control and Prevention on February 1,2023.Three kinds of reported data were used for model fitting:the daily numbers of positive nucleic acid tests and deaths,and the daily number of hospital beds taken by COVID-19 patients.It was estimated that the overall infection rate was 87.54%and the overall case fatality rate was 0.078%–0.116%(median 0.100%).Assuming that a new COVID-19 epidemic outbreak would start in March or April of 2023,induced by a slightly more infectious mutant strain,we predicted a possible large rebound between September and October 2023,with a peak demand of between 800,000 and 900,000 inpatient beds.If no such new outbreak was induced by other variants,then the current COVID-19 epidemic course in China's Mainland would remain under control until the end of 2023.However,it is suggested that the necessary medical resources be prepared to manage possible COVID-19 epidemic emergencies in the near future,especially for the period between September and October 2023.

COVID-19 transmission driven by age-group mathematical model in Shijiazhuang City of China

Background:A COVID-19 outbreak in the rural areas of Shijiazhuang City was attributed to the complex interactions among vaccination,host,and non-pharmaceutical interventions(NPIs).Herein,we investigated the epidemiological characteristics of all reported symptomatic cases by picking Shijiazhuang City,Hebei Province in Northern China as research objective.In addition,we established an age-group mathematical model to perform the optimal fitting and to investigate the dynamical profiles under three scenarios.Methods:All reported symptomatic cases of Shijiazhuang epidemic(January 2-February 3,2021)were investigated in our study.The cases were classified by gender,age group and location,the distributions were analyzed by epidemiological characteristics.Furthermore,the reported data from Health Commission of Hebei Province was also analyzed by using an age-group mathematical model by two phases and three scenarios.Results:Shijiazhuang epidemic caused by SARS-CoV-2 wild strain was recorded with the peak 84 cases out of 868 reported symptomatic cases on January 11,2021,which was implemented with strong NPIs by local government and referred as baseline situation in this study.The research results showed that R0 under baseline situation ranged from 4.47 to 7.72,and Rt of Gaocheng Distinct took 3.72 with 95%confidence interval from 3.23 to 4.35 on January 9,the declining tendencies of Rt under baseline situation were kept till February 3,the value of Rt reached below 1 on January 19 and remained low value up to February 3 for Gaocheng District and Shijiazhuang City during Shijiazhuang epidemic.This indicated Shijiazhuang epidemic was under control on January 19.However,if the strong NPIs were kept,but remote isolation operated on January 11 was not implemented as of February 9,then the scale of Shijiazhuang epidemic reached 9,482 cases from age group who were 60 years old and over out of 31,017 symptomatic cases.The investigation also revealed that Shijiazhuang epidemic reached 132,648 symptomatic cases for age group who were 60 years old and over(short for G2)under risk-based strategies(Scenario A),58,048 symptomatic cases for G2 under late quarantine strategies(Scenario B)and 207,124 symptomatic cases for G2 under late quarantine double risk strategies(Scenario C),and that the corresponding transmission tendencies of Rt for three scenarios were consistently controlled on Jan 29,2021.Compared with baseline situation,the dates for controlling Rt below 1 under three scenarios were delayed 10 days.Conclusions:Shijiazhuang epidemic was the first COVID-19 outbreak in the rural areas in Hebei Province of Northern China.The targeted interventions adopted in early 2021 were effective to halt the transmission due to the implementation of a strict and village-wide closure.However we found that age group profile and NPIs played critical rules to successfully contain Shijiazhuang epidemic,which should be considered by public health policies in rural areas of China's Mainland during the dynamic zero-COVID policy.

Oxygen potentiates antiviral ability of zebrafish in response to SVCV infection

Oxygen(O_(2))profoundly influences the physiological processes of aerobic organisms through a range of mechanisms.Recently,increasing evidence has revealed the relationship between viral infection and oxygen levels.However,due to a lack of feasible methods and in vivo models,how oxygen directly affects antiviral capability remains largely unknown.In contrast to terrestrial animals,fish live in water for life,where oxygen levels change more frequently than on land in areas with similar altitude.Therefore,fish appear to be ideal organisms for elucidating the effect of oxygen levels on antiviral responses.In this study,we report that zebrafish under low oxygen conditions are more susceptible to SVCV infection.Further assays indicate that low oxygen tension not only suppresses SVCV-induced IFN activation but also promotes SVCV replication in both zebrafish cell lines and zebrafish.This study provides novel insights into the effect of oxygen on antiviral responses and virus replication.

青岛某医院穿透性角膜移植手术原因

目的:分析过去10余年穿透性角膜移植术(PKP)的手术原因及变化情况。方法:回顾性系列病例研究。收集2013年1月至2017年12月在青岛眼科医院接受PKP的所有患者的病历资料,并与2005-2010年在青岛眼科医院接受PKP患者的资料进行比较,分析其年龄、性别和接受PKP相关的临床诊断等资料。采用卡方检验对2个时间段的PKP的手术原因进行统计分析。结果:2013-2017年间,共行PKP855例,前4位的手术原因依次为化脓性角膜炎303例(35.4%)、再次角膜移植132例(15.4%)、圆锥角膜130例(15.2%)和病毒性角膜炎115例(13.5%)。2005-2010年间,共行PKP875例,前4位手术原因依次为化脓性角膜炎、病毒性角膜炎、圆锥角膜和大泡性角膜病变。2个时间段内,PKP的主要手术原因均为化脓性角膜炎,其所占比例无明显变化(χ^2=0.543,P=0.461)。再次角膜移植的比例增加,成为青岛眼科医院2013-2017年间PKP第2位的手术原因(χ^2=33.294,P<0.001)。圆锥角膜始终居于PKP手术原因的第3位,但2013-2017年间PKP手术原因中所占比例较2005-2010年增加(χ^2=6.061,P=0.014)。病毒性角膜炎的比例下降,从2005-2010年的第2位下降到2013-2017年第4位的手术原因(χ^2=6.397,P=0.011)。结论:化脓性角膜炎是2013-2017年青岛眼科医院PKP的首位手术原因,然后依次为再次角膜移植、圆锥角膜和病毒性角膜炎。与2005-2010年相比,2013-2017年青岛眼科医院因再次角膜移植与圆锥角膜行PKP的比例上升,而病毒性角膜炎的比例下降。

Study and prediction of the 2022 global monkeypox epidemic

The World Health Organization(WHO)declared monkeypox as a public health emergency of international concern(PHEIC)on July 23,2022,their highest level of alert.This raised concerns about the management of the global monkeypox outbreak,as well as the scientific analysis and accurate prediction of the future course of the epidemic.This study used EpiSIX(an analysis and prediction system for epidemics based on a general SEIR model)to analyze the monkeypox epidemic and to forecast the major tendencies based on data from the USA CDC(https://www.cdc.gov)and the WHO(https://www.who.int/health-topics/monkeypox).The global outbreak of monkeypox started in the UK on May 2,2022,which marked the beginning of an epidemic wave.As of October 28,2022,the cumulative number of reported cases worldwide was 77,115,with 36 deaths.EpiSIX simulations predict that the global monkeypox epidemic will enter a low epidemic status on March 1,2023 with the cumulative number of confirmed cases ranging from 85,000 to 124,000,and the total number of deaths ranging from 60 to 87.Our analysis revealed that the basic reproduction number(R0)of monkeypox virus(MPXV)is near to 3.1 and the percentage of asymptomatic individuals is 13.1%–14.5%,both of which are similar to the data for SARS.The vaccination efficiency against susceptibility(VEs)of individuals who have had monkeypox is~79%,and the vaccination efficiency against infectiousness(VEi)of individuals who have had monkeypox is~76%–82%.The mean incubation period for monkeypox is 8 days.In total,94.7%of infected individuals develop symptoms within 20 days and recover within 2 weeks after the confirmation of symptoms.Simulation results using EpiSIX showed that ring vaccination was remarkably effective against monkeypox.Our findings confirmed that a 20-day isolation for close contacts is necessary.