With the development of science and technology, new medical equipments is toward the direction of intelligent and portable. In order to assist medical personnel to patients with blood, developing from previous devices, a new kind of vein locating projection instrument based on two-dimensional scanning mirror is put forward. It can scan and project vein image using a scanning mirror. The related algorithm is also be improved, make vein scan projection more practical. The system finally set up can perform well in vein scan projection.
Algorithms ; Diagnostic Imaging ; instrumentation ; Humans ; Veins ; anatomy & histology

To explore novel antifatigue agents targeting with AMPA receptor, 10 compounds were synthesized and their structures were confirmed by 1H NMR, ESI-MS and elemental analysis. 1-BCP was treated as the leading compound. The antifatigue activities were evaluated by weight-loaded forced swimming test, and the AMPA receptor binding affinities were tested with radioligand receptor binding assays. The results unveiled that 5b appeared to possess potent antifatigue activities and high affinity with AMPA receptor, which deserved further studies.

AIM:To explore the influences of semaphorin 3A (Sema 3A) on hydrogen peroxide (H2O2)-induced injury in human umbilical vein endothelial cells (HUVECs).METHODS:Sema 3A over-expression vectors were constructed and transfected into the HUVECs by Lipofectamine 2000, and the over-expression effect was verified by qPCR and Western blot.The HUVECs in different groups were treated with or without 200 μmol/L H2O2 for 4 h.The levels of inflammatory cytokines were measured by qPCR.The levels of lactic dehydrogenase (LDH), superoxide dismutase (SOD) and malondialdehyde (MDA) were detected by corresponding colorimetry.The cell viability was measured by MTT assay.The cell apoptosis was analyzed by flow cytometry.The levels of apoptosis-related proteins cleaved caspase-3 and Bcl-2 were determined by Western blot.RESULTS:H2O2 induced inflammatory cytokine secretion, increased the levels of LDH and MDA, decreased SOD activity and cell viability, and increased cell apoptosis in the HUVECs.Over-expression of Sema 3A enhanced the above processes.No injury effect of Sema 3A over-expression on HUVECs without H2O2 treatment was observed, indicating that the injury effects of Sema 3A on HUVECs depended on H2O2.CONCLUSION:Sema 3A markedly enhances H2O2-induced injury in the HUVECs, which depends on H2O2.Sema 3A may promote oxidative stress-caused endothelial cell injury.

Objective To investigate the imaging features of primary Rosa-i Dorfman disease (RDD)in the central nervous system and to increase the understanding of the disease.Methods The MRI findings of 5 cases with primary RDD of the central nervous system were analyzed retrospectively,and the related literatures were reviewed.Results Four cases located in the cranium,1 case located in the spinal cord,and 5 tumors were attached to the brain (ridge)membrane.The tumor was equal and low signal on T1 WI,and equal or slightly high signal on T2 WI.Obvious enhancement could be seen on enhance study,and obvious enhancementwas visible in adjacent brain (ridge)membrane,in which 1 case involved the skull,with thickening and strengthening of the skull.Tumors were attached to the meninges in a wide range,the local meninges of 3 cases were penetrated by tumor.Conclusion If young and middle-aged males have no obvious specific clinical manifestations,the images of MRI are single or multiple lesions that are closely related to the brain (ridge)membrane in larger extent and easily penetrate the brain (ridge)membrane,the possibility of RDD should be considered.

Since the outbreak of the COVID-19 at the end of December 2019, Hubei province has actively adopted a series of prevention and control measures such as ^“quarantine, treatment, testing, and containment^”, and have basically blocked the spread of COVID-19. However, with the development of overseas epidemics and the occurrence of case clusters in local areas, we not only face the threat of imported cases, but also face the urgent need to resume normal work and daily life. This puts forward higher requirements for regular prevention and control of COVID-19. Therefore, we should more deeply understand the significance of regular prevention and control as well as the epidemic situation in our province, summarize experience and lessons, and adhere to the prevention and control strategy of ^“government-led, group-specialist combination, and specialized-oriented^”. Meanwhile, it is necessary to implement the working requirement that combines regular prevention and control surveillance with rapid emergency response to local COVID-19 outbreaks. Furthermore, we should establish a regular multi-point trigger early warning mechanism for COVID-19, strengthen the reserve of emergency supplies and carry out training and drills on epidemic prevention and control across the province to make full preparations for the coming autumn and winter epidemics. The most important is to reform the system of disease prevention and control and public health, comprehensively improve the ability of prevention and treatment, and promote the modernization of public health governance.

Objective To understand the epidemiological characteristics of the novel coronavirus diseases 2019 (COVID-19), and to scientifically guide the prevention and control of COVID-19 in Hubei Province. Methods All COVID-19 cases reported online in Hubei Province as of March 31, 2020 were extracted from Hubei^'s Infectious Disease Information System. The epidemic curve, age and sex characteristics, and spatiotemporal distribution characteristics of the COVID-19 cases were analyzed. Results As of March 31, 2020, a total of 70 764 cases were reported in Hubei Province, including 49 195 confirmed cases. A total of 4 579 deaths occurred among the confirmed cases, and the reported case fatality rate was 6.47%. The peak of the onset of symptoms occurred from January 20 to February 14, 2020. The sex ratio of male to female of the confirmed cases was 0.99: 1, and most were 30-69 years old. The cases diagnosed before January 5 were mainly reported by Wuhan City. From January 6 to January 31, all counties and districts in the province reported that the incidence of confirmed COVID-19 cases began to rise, and about 50% counties reported that the morbidity rate of confirmed COVID-19 cases was over 10 cases per 100 000. The morbidity rate of COVID-19 cases rose rapidly between February 1-15, and then gradually reached its peak after February 16. Conclusion Wuhan City of Hubei Province first discovered and reported the COVID-19 outbreak. The onset of symptoms peaked in January 20 to February 14, and the 30-69 years old group was the key population. Many measures such as restricting personnel movement, reducing contact, and strengthening health education played an important role in controlling the outbreak of COVID-19 in Hubei.