AIM: To evaluate the efficacy of vitreous hemorrhage(VH)in patients with polypoidal choroidal vasculopathy(PCV), and to summarize the clinical characteristics of the cases.

METHODS: Retrospective case series. From Jan. 2014 to Dec. 2017, 14 patients(15 eyes)with PCV combined with VH were treated by microincision 25G vitrectomy in our hospital and were followed up for at least 6mo. Data of medical history and follow up observation were collected. The main outcome measures included visual acuity, intraocular pressure, ultrasonography, color fundus photography, fundus angiography, optical coherence tomography, and surgical complications. To analyze the difference of the best corrected visual acuity(BCVA, LogMAR)between pre-operation and postoperation, and to summarize the clinical characteristics and therapeutic effect of the cases.

RESULTS: Totally 11 cases had history of hypertension. 9 eyes were diagnosed with PCV before vitrectomy. The follow-up period was from 6-36mo. All 15 eyes were treated with microincision 25G vitrectomy. During the operation, 3 eyes were silicone oil tamponade in the vitreous cavity, 2 eyes were gas tamponade, and the remaining eyes were balanced saline solution tamponade. Postoperative complications included progressed cataract in 2 eyes, recurrent VH in 1 eye, high intraocular pressure in 1 eye, and recurrent retinal detachment in 0 eye. The BCVA before surgery was 2.78±0.46, and the last follow up BCVA after surgery was 1.15±0.50. Postoperative BCVA was significantly improved compared with the preoperation(t=11.14, P<0.01).

CONCLUSION: Microincision vitrectomy is a safe and effective way to treat PCV with VH, which can improve the visual acuity of patients with PCV companied with VH. The history of hypertension may be a risk factor for PCV with VH.

To better practice the Deepening Standardization Reform Plan, announced by the State Council, to promote the leadership of standard in healthy development of preventive medicine and public health, the Chinese Preventive Medicine Association (CPMA) established the Standardization Committee of Chinese Preventive Medicine Association (SC-CPMA). The SC-CPMA was responsible for the work of standardization developments of CPMA, including review of project's qualification and proposal, pre-qualification and qualification review of standard, publicity and training of standard, evaluation of standard implementation, review of standard, and public response monitoring of the standard. At December 13, 2018, CPMA published two group standards, the Technical specification of data processing for large population-based cohort study (T/CPMA 001-2018) and Technical specification of data security for large population-based cohort study (T/CPMA 002-2018). This was the first time that a group standard was published by CPMA and produced for large cohort study's establishment and research. These two standards were the milestones for public health areas and the academic achievement of team, leading by Dr. Li Liming, after decade of research and practice. The two standards were developed based on the China Kadoorie Biobank Study and aimed to formulate professional standards and standardized operation procedures that met the nationals conditions, with strong operability and generality of population cohort establishments. The group standards were also aimed to guide the establishments for other population-based cohort studies to maximum support the decision making and practice for disease control and prevention. The increasing disease burden of non-communicable disease (NCD) became severe public health problem and the etiology for NCD is complex. Large cohort studies, which became more popular recently, played an important role in observation and explanation of NCD etiology and risk factors. Under the current situation with growing number of large cohort studies, it is necessary to have a standard, which could be shared and used to guide other professional as critical scientific protocols. CPMA was committed to promoting the development of group standards in the field of public health, and supporting the implementation of the Healthy China Strategy.
China ; Cohort Studies ; Delivery of Health Care ; Humans ; Public Health ; Risk Factors

Objective To investigate the related factors of pathological complete response(pCR)of patients with gastric cancer treated by neoadjuvant therapy and resection,and to analyze the risk factors of prognosis. Methods The clinical and pathological data of 490 patients with gastric cancer who received neoadjuvant therapy followed by radical gastrectomy from January to December in 2008 were retrospectively analyzed.Univariate and multivariate analyses were performed to identify the risk factors affecting pCR and prognosis. Results Among the 490 patients,41 achieved pCR,and the overall pCR rate was 8.3%(41/490).The pCR rate was 16.0% in the neoadjuvant chemoradiation group and 6.4% in the neoadjuvant chemotherapy group.The results of multivariate analysis showed that neoadjuvant chemoradiation(
Humans ; Neoadjuvant Therapy ; Neoplasm Staging ; Prognosis ; Retrospective Studies ; Stomach Neoplasms/pathology*

Objective: To understand the prevalence of latent tuberculosis infection (LTBI) among college freshmen in Chaoyang District of Beijing from 2013 to 2015, and to provide evidence for prevention and control of tuberculosis in schools. Methods: The latent tuberculosis infection was identified through a tuberculin purified-protein derivative (TB-PPD) skin test. TB-PPD test results of 65 233 college students in the Chaoyang District during 2013 to 2015 were collected and stored, by using descriptive statistical analysis. Results: Among the 65 233 freshmen, 63 135 were effective PPD test results, 11 754 were PPD positive, 2 720 were PPD strong positive, the LTBI status: the PPD positive rate was 18.62% and the PPD strong positive rate was 4.31%. The positive rate and the strong positive rate in male (19.56%, 4.76%) were higher than that in female(17.87%, 3.95%)(χ2=29.37, 24.29), in ethnic minorities were higher than that in Han Nationality (18.25%,4.16%) and in Tibetans (29.45%, 8.69%) were the highest(χ2=102.01, 70.04), among freshmen from the western region (21.88%, 5.11%)were the highest and from Beijing city (16.25%, 3.46%) were lower (χ2=220.63, 99.03, P<0.01), among those with BCG scar (18.94%, 4.34%) are slightly higher than those without BCG scar(16.96%, 4.08%) (χ2=48.46, 10.43, P<0.01). 19 cases of tuberculosis patients were found, the prevalence rate was 29.13/100 000 (19/65 233), of which 68.42% (13/19) were found through the strong positive for PPD. Among the strong positive students (2 707), there were 1 433(52.94%) who received preventive therapy, and during the follow-up two years, 7 were newly diagnosed with tuberculosis, the annual incidence rate was 129.29/100 000 (7/2 707). Conclusion Freshmen from high-risk areas of tuberculosis are the focus of tuberculosis screening, for which we should continue to carry out PPD screening. Those with latent tuberculosis infection are high-risk groups of tuberculosis, and should be paid more attention in the prevention and control of tuberculosis in schools.

OBJECTIVE: To establish a method for detection of bis(chloromethyl) ether in workplace air using portable gas chromatography-mass spectrometry(GC-MS).METHODS: The sample of bis(chloromethyl) ether in workplace air was collected and detected using the portable GC-MS.The samples were separated by SPB-1 chromatographic column.The mass spectrometry was used for detection,and qualitatively measured by the time and characteristics and quantified by ions peak area.RESULTS: The linear range of bis(chloromethyl) ether was 1.32-66.00 μg/m~3,and the correlation coefficient was 0.999.The detection limit and the lower limit of quantitation were 0.66 and 1.32 μg/m~3 respectively.The spiked recovery for bis(chloromethyl) ether was 96.97%-112.12%.The within-run relative standard deviation(RSD) was6.12%-9.46%.The RSD of different batches samples was 12.31%-19.05%.CONCLUSION: The established GC-MS method for detection of bis(chloromethyl) ether in the air of workplace is of high accuracy and is suitable for rapid qualitative and quantitative detection of bis(chloromethyl) ether in the workplace air.

AIM: To evaluate the centration of the SBL-3 multifocal intraocular lens, the size of the distant and near power zone in the pupil area and the area of the visual axis using Itrace visual function analyzer.

METHODS: Retrospective case study. From January 2018 to January 2019, 51 eyes of 36 patients underwent phacoemulsification cataract combined with regional refraction multifocal intraocular lens implantation at Beijing Aier-Intech Eye Hospital were enrolled. The centration, visual axis, angle α, angle Kappa and the orientation of the intraocular lens measured by Itrace were used to calculate the position of the visual axis in the intraocular lens and the changes in the proportions of the distant and near power zones in the pupil area.

RESULTS: The centration(R)of intraocular lens is 0.217±0.09mm. The distribution of the visual axis in the intraocular lens is 0.217±0.09mm. The visual axis is evenly distributed in the distant and near power zones. There was no statistical significance between the two groups with postoperative visual acuity ≥0.8 and <0.8(P>0.05). The size of the angle Kappa is 0.187±0.079mm. The displacement of angle Kappa on the y-axis is 0.10±0.06mm. There was no statistical significance between the changes in the pupil size of distant and near power zones in the pupil area caused by the deviation of the pupil and the postoperative visual acuity ≥0.8 and <0.8(P>0.05).

CONCLUSION: The intraocular lens centration and axial data measured by the Itrace visual function analyzer can be used to estimate the area where the visual axis is located and the size of the distant and near power zones in the pupil area, thereby assisting in evaluating the postoperative visual quality of the regional refraction multifocal intraocular lens implanted after cataract surgery.

An outbreak of severe pneumonia of unknown cause was reported in December 2019 in Wuhan, Hubei Province, China. The infectious virus was soon identified and named as 2019 novel coronavirus (2019-nCov). The name of the coronavirus infectious disease (COVID-19) was given by WHO on 11 February 2020. It has so far caused about 118 000 cases in 114 countries including China and was characterized as a pandemic by WHO on 11 March. We still face great challenges in control of the epidemic: uncertain initial source of infection, infected populations widely scattered, complex routs of transmission, populations generally susceptible, high contagiousness of the virus, and finally vaccines unlikely available in the near future.

Objective To establish a mouse model of exogenous iron overload combined with tuberculosis(TB). Methods C57BL/6N mice were divided into negative control, low-, medium-, and high-dose iron groups and received intraperitoneal injection of iron dextran at 0, 3.75, 7.50, and 15.00 mg/dose(3 times/week for 4 weeks), respectively.After 4 weeks, the organ morphology and body weight of the mice were evaluated.The content of serum iron, ferritin, transferrin, and transferrin receptor was determined by ELISA.Heart, liver, spleen, lung, kidney, and small intestine were analyzed for tissue iron content and iron deposition pathology.
Animals ; Humans ; Iron ; Iron Overload ; Iron-Dextran Complex ; Mice ; Mice, Inbred C57BL ; Tuberculosis

Objective: To explore the characteristics of viral infections in children with diarrhea in Beijing from 2018 to 2022. Methods: Real-time PCR and enzyme-linked immunosorbent assay were used to detect viral nucleic acid of Norovirus (NoV), Sappovirus (SaV), Astrovirus (AstV), Enteric Adenovirus (AdV) or antigen of Rotavirus (RV) in 748 stool samples collected from Beijing Capital Institute of Pediatrics from January 2018 to December 2021. Subsequently, the reverse transcription PCR or PCR method was used to amplify the target gene of the positive samples after the initial screening, followed by sequencing, genotyping and evolution analysis, so as to obtain the characteristics of these viruses. Phylogenetic analysis was performed using Mega 6.0. Results: From 2018 to 2021, the overall detection rate of the above five common viruses was 37.6%(281/748)in children under 5 years old in Beijing. NoV, Enteric AdV and RV were still the top three diarrhea-related viruses, followed by AstV and SaV, accounting for 41.6%, 29.2%, 27.8%, 8.9% and 7.5%, respectively. The detection rate of co-infections with two or three diarrhea-related viruses was 4.7% (35/748). From the perspective of annual distribution, the detection rate of Enteric AdV was the highest in 2021, while NoV was predominant in the other 4 years. From the perspective of genetic characteristics, NoV was predominant by GⅡ.4, and after the first detection of GⅡ.4[P16] in 2020, it occupied the first two gene groups together with GⅡ.4[P31]. Although the predominant RV was G9P[8], the rare epidemic strain G8P[8] was first detected in 2021. The predominant genotypes of Enteric AdV and AstV were Ad41 and HAstV-1. SaV was sporadic spread with a low detection rate. Conclusion: Among the diarrhea-related viruses infected children under 5 years of age in Beijing, the predominant strains of NoV and RV have changed and new sub-genotypes have been detected for the first time, while the predominant strains of AstV and Enteric AdV are relatively stable.
Child, Preschool ; Humans ; Infant ; Beijing/epidemiology* ; Diarrhea/epidemiology* ; Feces ; Norovirus/genetics* ; Phylogeny ; Rotavirus/genetics* ; Virus Diseases/epidemiology* ; Viruses/genetics*

OBJECTIVETo compare the efficacy and safety between liposome-paclitaxel plus carboplatin (LPC) and paclitaxel plus carboplatin (PC) as first-line treatment for advanced non-small cell lung cancer (NSCLC).

METHODSTotally 54 chemotherapy-naive NSCLC patients were equally and randomly assigned into LPC group and PC group. Liposome-paclitaxel was injected on D1 at a dosage of 175 mg/m(2); the same dose and administration with paclitaxel injection in the PC group for a maximum of 2 cycles. The efficacy and adverse reactions after 2 cycles of chemotherapy were compared between these two groups.

RESULTSThe overall response rate (CR+PR) was 44.4% in the LPC group and 33.3% in the PC group after 2 cycles of chemotherapy respectively (P=0.577). In the LPC group and PC group, the incidences of myelodepression was 81.5% and 63.0%, respectively (P=0.080), gastrointestinal toxicity was 96.3% and 77.8% respectively (P=0.100), and allergic reactions was 0 and 11.1%, respectively (P=0.000). The median time to progression was 6 months and 5 months, respectively (P=0.420).

CONCLUSIONLPC group has the same efficacy with PC group and less adverse reactions than PC group.

Adult ; Aged ; Carboplatin ; administration & dosage ; Carcinoma, Non-Small-Cell Lung ; drug therapy ; Female ; Humans ; Liposomes ; Lung Neoplasms ; drug therapy ; Male ; Middle Aged ; Paclitaxel ; administration & dosage ; Treatment Outcome