Objective: To understand the characteristics of injury cases in Longhua District, Shenzhen City, Guangdong Province from 2021 to 2024, so as to provide the evidence for the development of injury prevention and control measures. Methods: The data of injury cases in the first visit due to injury in the sentinel hospitals of Longhua District from 2021 to 2024 were collected from the Shenzhen Injury Surveillance System. The time, cause, place, activity, intention, nature, position, severity, and outcome of injury were described. Results: From 2021 to 2024, a total of 167 524 injury cases were reported in Longhua District, with a male-to-female ratio of 1.89∶1. The incidence of injuries was higher in cases aged 30-<45 years (49 957 cases, 29.82%). Injuries mainly occurred from July to August (31 272 cases, 18.67%). The main cause of injury was falls (52 048 cases, 31.07%). Injuries mainly occurred at home (64 110 cases, 38.27%). Leisure activities were the main activities when injuries occurred (79 008 cases, 47.16%). Most of the injuries were unintentional (159 173 cases, 95.02%). The main type of injury was contusion/abrasion (71 900 cases, 42.92%). The main injury site was upper limb (64 247 cases, 38.35%). Most injuries were mild (131 369 cases, 78.42%). The main injury outcome was discharge after treatment, 160 882 cases (96.04%). The second cause of male injury was blunt force injury (30 140 cases, 27.49%), and the second cause of female injury was animal injury (14 648 cases, 25.31%). Fall was the leading cause of injury in people aged 0-<15 years and ≥65 years, and blunt force injury was the leading cause of injury in people aged 15-<65 years. The second place for male injuries was industrial and construction places (23 722 cases, 21.64%), and for female injuries was school/public places (9 644 cases, 16.66%). The first place for injuries in people aged 45-<65 years was in industrial and construction places. The proportions of fractures, moderate injuries, and hospitalizations increased with age (all P<0.05). Conclusions The main injury cases in Longhua District were males and people aged 30-<45 years. July and August were a period of high risk for injuries. People aged 0-<15 years and ≥65 years were the high-risk groups of falls. More attention should be paid to the fracture risk in the elderly.

Objective:To investigate the alterations of brain resting-state functional connectivity in patients with leukoaraiosis(LA), and to explore its neuropathological mechanism of cognitive dysfunction.Methods:From August 2022 to February 2023, 28 patients with LA(LA group) and 30 gender, age and education level matched normal controls(NC group) in Jiangsu Shengze Hospital affiliated to Nanjing Medical University were prospectively recruited.Mini mental state examination, trail-making test, and Stroop color-word test were used to evaluate the cognitive function of participants, rs-fMRI images were processed by DPABI V6.1 based on MATLAB R2022a.Voxel-mirrored homotopic connectivity(VMHC) values were calculated and two-sample t test were performed to compare the differences in local brain activity between the two groups.The brain regions with significant differences were selected as the seeds to calculate the functional connectivity(FC) values of the whole brain, and Pearson correlation analyses were performed to evaluate the correlation between the FC values and neuropsychological scores. Results:The VMHC values of the calcarine fissure and surrounding cortex(CAL) (x=±18, y=-63, z=15), postcentral gyrus(PoCG) (x=±39, y=-27, z=48), lingual gyrus(LING) (x=±12, y=-51, z=-6), middle occipital gyrus(x=±27, y=-75, z=24) and insula(x=±36, y=6, z=3) in the LA group were lower than those in the NC group( P<0.05). The seed points FC results showed, FC values between right CAL(CAL.R) and bilateral precuneus(PCUN), right dorsolateral prefrontal cortex(DLPFC.R) and right temporal_mid were reduced in the LA group( P<0.05); FC values between PoCG.R and left CAL, left temporal_mid and right LING were reduced too( P<0.05). Additionally, the FC value in the LA group between CAL.R and DLPFC.R was negatively correlated with the Stroop C score( r=-0.39, P<0.05). The FC value in LA group and NC group between CAL.R and DLPFC.R was negatively correlated with the Stroop C score( r=-0.48, P<0.001)and also negatively correlated with the trail making test B(TMT-B) score( r=-0.40, P<0.01), and the FC value between CAL.R and PCUN.L was negatively correlated with the TMT-B score( r=-0.45, P<0.001). Conclusion:Desynchronized interhemispheric functional connectivity and abnormal cortical circuit functional connectivity were probably associated with the underlying neural mechanisms of cognitive impairment in LA.

Objective To analyze the antibiotic phenotype of Pseudomonas aeruginosas that were isolated from pleural samples in our hosptial and test relative genes that may cause antibiotic resistance in order to provide information for clinical treatment . Methods BioMerieux Bact/ALERT 3D 120 blood culture system was used to culture pleural samples .Simens MicroScan Walk‐Away 96 was employed for bacterial identification and susceptibility test .Imipenem‐EDTA double disk method was used for screen‐ing MBL‐producing isolates .PCR was used for testing OprD ,VIM and IMP .Results 14 of 38 Pseudomonas aeruginosas isolates showed resistance to Imipenem and 2 were with multi‐resistance .4 isolates produced MBL .Only two were found lack of OprD gene among the 14 isolates ,and IMP and VIM genes were detected in 2 isolates .Conclusion The Pseudomonas aeruginosas from pleural infection show relative higher resistant rate to Imipenem ,and the exsiting mechanisms of Imipenem resistance included MBL (VIM and IM P genes) and lack of OprD .

Cerebral ischemia is one of the most common diseases treated by acupuncture therapeutics. Recent studies indicated that acupuncture treatment by needling the conception and governor vessels had positive effects in promoting neural regeneration in patients after cerebral ischemia injury. Acupuncture intervention could continuously promote the proliferation and differentiation of the neural stem cells in the brain, obviously up-regulate expression of growth factors, accelerate angiogenesis and inhibit apoptosis. Hence, it is necessary to present an exhaustive review on the mechanisms. The present review gives a detailed description of pathological changes of cerebral ischemia and acupuncture intervention applied to the conception and governor vessels, and proposes research prospects in the future.

Objective: To study the preparation technique and release characteristic of 5- fluorouracil-loaded chitosan microspheres for the intranasal administration. Methods:Using the liquid paraffin as the oil phase,and span-80 as the emuifier; 5- fluorouracil-loaded chitosan microspheres were achieved by emulsion-chemical crosslink technique. The orthogonal experimental design was applied to optimize the preparation procedure. Dynamic dialysis method was used to determine the releasing characteristic of microspheres in vitro and it influencing fators.Swelling behavior was expressed by swelling ratio.The degree of mucoadhesion was investigated by determining the mucociliary transport rate(MTR) of the microparticle across a frog palate. Results: Microspheres with a good shape and narrow size distribution were prepared. The average diameter was (43?4) ?m. The drug loading was 38.5%? 1.0%. The entrapment efficiency was 79.0%?1.8%.The drug release profile in vitro could be described by Higuichi eqution Q=0.1035t 1/2 +0.0284 (r=0.9965). Chitosan had good mucoadhesive property and caused a siginificant reduction in MTR(P

0.1%EDTA≈5% HP ? CD≈1%lecithin. Conclusion: The three methods have good correlation.