Background In recent years, radiation diagnosis and treatment technology has been increasingly applied and popularized in the medical field, and the status of radiation health protection has attracted widespread attention. Objective To understand the knowledge, attitude, and behavior of radiological health protection in radiation workers in Jiading District of Shanghai. Methods Convenience sampling method was used to select 441 radiation workers from 33 medical institutions in Jiading District, Shanghai to conduct a questionnaire survey from May to August 2023. Basic information and radiation protection associated knowledge, attitude, and behavior were collected from the study participants, and the scores of knowledge, attitude, and behavior were calculated. Factors affecting the behavior were evaluated by multiple linear regression. Results A total of 441 subjects were included in this study, with an age range of 22-71 years, 53.06% male and 46.94% female. In terms of knowledge, the correct response rate of the study subjects to the seven questions on the basics of radiation protection ranged from 44.22%-96.60%, with the lowest rate of 44.22% for the question on "radiation stochastic effect diseases". The subjects acquired knowledge about radiation hygiene mainly through vocational training (98.41%), and wanted to acquire knowledge mainly about the basics of nuclear and radiation (76.42%). In terms of attitude, the recognition level (strongly agree/agree) of the study subjects on the six attitude questions ranged from 73.47% to 96.37%, in which only 56.92% of the radiological staff at tertiary hospitals believed that the radiation dose they were exposed to at work would be hazardous to their health, and 73.85% believed that it was necessary to participate in training on knowledge of radiological protection, both lower than those in other levels of hospitals. In terms of behavior, the implementation rate (always/often) of the five behavioral questions by the study participants ranged from 75.28% to 91.84%, and there was a statistically significant difference in the total behavioral scores of the study participants by levels of hospitals (P=0.015). The results of multiple linear regression showed that gender, age, and radiation work permit associated with the behavioral scores of the study subjects. Conclusion In Jiading District, Shanghai, the coginitive rate of radiation workers' basic knowledge of theoretical protection still needs to be improved, and occupational training should be carried out in a targeted manner; the attitude of radiation workers varies by levels of hospitals, and the publicity and education of workers at tertiary hospitals in particular should be strengthened; and the supervision and management of male, senior, and non-certified radiation workers in hospitals of different levels should be enhanced.

Background::Long non-coding RNAs (lncRNAs) plays an important role in the progression of gastric cancer (GC). Their involvement ranges from genetic regulation to cancer progression. However, the mechanistic roles of RP11-789C1.1 in GC are not fully understood.Methods::We identified the expression of lncRNA RP11-789C1.1 in GC tissues and cell lines by real-time fluorescent quantitative polymerase chain reaction. A series of functional experiments revealed the effect of RP11-789C1.1 on the proliferation of GC cells. In vivo experiments verified the effect of RP11-789C1.1 on the biological behavior of a GC cell line. RNA pull-down unveiled RP11-789C1.1 interacting proteins. Western blot analysis indicated the downstream pathway changes of RP11-789C1.1, and an oxaliplatin dosing experiment disclosed the influence of RP11-789C1.1 on the drug sensitivity of oxaliplatin. Results::Our results demonstrated that RP11-789C1.1 inhibited the proliferation of GC cells and promoted the apoptosis of GC cells. Mechanistically, RP11-789C1.1 inhibited checkpoint kinase 1 (CHK1) phosphorylation by binding ataxiatelangiectasia mutated and Rad3 related (ATR), a serine/threonine-specific protein kinase, promoted GC apoptosis, and mediated oxaliplatin sensitivity.Conclusion::In general, we discovered a tumor suppressor molecule RP11-789C1.1 and confirmed its mechanism of action, providing a theoretical basis for targeted GC therapy.

Objective:To explore the predictive value of the neutrophil-to-lymphocyte ratio (NLR) combined with blood glucose at admission for a positive blood culture for sepsis.Methods:A single-center retrospective cohort study was conducted. According to the 2016 American Society of Critical Care/European Society of Critical Care Medicine (SCCM/ESICM) and diagnostic criteria for sepsis and septic shock-3.0 (sepsis-3.0), patients with sepsis were admitted to the Emergency Department of Fujian Medical University Union Hospital for more than 24 h from January 2019 to December 2021 were enrolled. Age, gender, sequential organ failure assessment, source of infection, NLR, and blood culture results were recorded. Based on the blood culture results, patients were divided into a blood culture positive group (Gram-positive group, Gram-negative group) and blood culture negative group, and the differences between the groups were compared. The risk factors for a positive blood culture were analyzed using multivariate logistic regression. A receiver operating characteristic analysis was performed for the NLR combined with the blood glucose measurement.Results:A total of 265 patients with sepsis were included, of which 62 were positive in blood culture (15 Gram-positive patients, 37 Gram-negative patients and 10 fungal patients). The positive rate of blood culture was 23.4%. The number of patients with history of diabetes, neutrophil count, procalcitonin, blood glucose, and NLR in the positive blood culture group were significantly higher than those in the negative blood culture group (all P<0.001). Multivariate logistic regression analysis revealed that random admission blood glucose ( OR=1.116, 95% CI: 1.051~1.186, P<0.001) and NLR ( OR=1.039, 95% CI: 1.015~1.064, P=0.001) were independent risk factors for blood culture positivity in sepsis patients. For patients with blood culture positive, and with Gram-negative bacterial bloodstream infections, the AUC of the NLR combined with the admission blood glucose level was 0.819 (95% CI: 0.761-0.877, P<0.001) and 0.871 (95% CI: 0.813-0.928, P<0.001), respectively. Conclusions:The combination of NLR and random admission blood glucose could provide a good predictive value for blood culture positive and gram-negative bacterial bloodstream infections in sepsis patients.

OBJECTIVE To investigate the causal association between ticagrelor and risk of infection METHODS Two-sample Mendelian randomization was adopted. Genetic instrumental variables were selected based on the results of the largest genome-wide association analysis to in vivo exposure of ticagrelor and its major active metabolite AR-C124910XX. The causal associations of ticagrelor and its major active metabolite AR-C124910XX with drug indications （coronary artery disease， unstable angina pectoris， myocardial infarction， stroke and ischemic stroke）were analyzed by inverse variance weighted Mendelian randomization model as a positive control for genetic instrumental variables. The causal relationship between ticagrelor and bacterial infection， acute lower respiratory infection， bacterial pneumoniae， pneumoniae，acute upper respiratory infection and sepsis were furtheranalyzed by using this method， and the robustness of the results was assessed by using heterogeneity tests and horizontal 202002030415） pleiotropy tests. RESULTS The increase of area under the curve at steady state （AUCss） of the genetic surrogated ticagrelor significantly reduced the risk of coronary artery disease， myocardial infarction and unstable angina pectoris （P＜0.001）. AUCss genetic instrument variables of its main active metabolite AR-C124910XX failed to pass positive control. Further analysis showed that the increase of the genetic surrogated ticagrelor exposure suggestively reduced the risk of bacterial infection [OR（95%CI）＝0.80（0.65，0.99），P＝0.040] and sepsis [OR （95%CI）＝0.84（0.73， 0.98）， P＝0.023]. The results of the heterogeneity tests showed that there was no heterogeneity in the causal association of the genetic surrogated ticagrelor AUCss with bacterial infection and sepsis （P＞0.05）. The results of horizontal pleiotropy tests showed that the causal association of genetic surrogated ticagrelor AUCss with bacterial infection and sepsis had no effects on horizontal pleiotropy （P＞0.05）. CONCLUSIONS Ticagrelor has a potential role in reducing the risk of sepsis and bacterial infections.

Objective:To investigate the relationship between vaccination doses and the duration of positive nucleic acid or antigen tests in Corona Virus Disease 2019 (COVID-19) patients during omicron epidemic.Methods:A cross-sectional study was conducted from December 26 to December 31, 2022 among COVID-19 patients from all community health service centers in 16 districts of Beijing municipality selected by multi-stage stratified cluster quota sampling method. A questionnaire was used to collect the basic information, vaccination doses, results of nucleic acid or antigen tests of all subjects. The subjects were divided into 5 groups according to the doses of COVID-19 vaccination: the non-vaccination group, the 1, 2, 3 and 4 doses vaccination group. The relationship between vaccination doses and the duration of positive nucleic acid or antigen tests was analyzed by univariate and multivariate logistic regression models.Results:A total of 10 506 COVID-19 cases were included in the study with the age of (43.3±13.7) years. The duration of positive nucleic acid or antigen tests was longer than 7 days in 59.4%(276/465), 51.5%(67/130), 50.6%(355/701), 46.1% (3 464/7 520) and 39.2%(662/1 690) of non-vaccination, and 1, 2, 3, 4 dose vaccination groups, respectively ( P<0.001). Multivariate logistic regression analysis showed that compared with non-vaccination patients, the vaccination dose was an independent protective factor for duration of positive nucleic acid or antigen tests>7 days, and the OR values were 0.7 (95% CI 0.5-0.9, P=0.015), 0.6 (95% CI 0.5-0.8, P<0.001) and 0.5 (95% CI 0.4-0.6, P<0.001) for 2, 3 and 4 doses of vaccination, respectively. Conclusion:The vaccination doses are independently related to the duration of positive nucleic acid or antigen tests in COVID-19 patients and the risk is gradually decreases with the increasing vaccination doses.

Objective:To study characteristics of changes in the demand for emergency medical services during epidemic prevention and control "10 new measures" in Zhejiang province.Methods:The data of 26 emergency centers connected to the provincial integration platform of Zhejiang Province (hereinafter referred to as "provincial platform" ) were retrospectively analyzed, and the data were collected from one week before the implementation of "10 new measures" to the sixth week after implementation (December 1, 2022 to January 18, 2023). The collected information included: the number of 120 calls and ambulance services, the types of disease, age composition of patients, performance of emergency medical services.Results:From the second week of the implementation of "10 new measures" (December 15 to 21, 2022), the number of 120 calls and ambulance services were increased rapidly, and the peak occurred in the third week of implementation (December 21 to 28, 2022). Among the types of diseases, the number and proportion of patients with abnormal symptoms and respiratory diseases increased significantly, reaching the highest peak in the third week (December 21 to 28, 2022) and the fourth week (December 29, 2022 to January 4, 2023) of implementation, respectively. After the second week of implementation, the number of elderly patients aged 71 to 100 increased significantly, reaching a peak in the fourth week (December 29, 2022 to January 4, 2023), accounting for 60.76% of the total. During the epidemic period, the quality control indicators such as emergency dispatch time, ambulance dispatch time and medical treatment all fluctuated, but the changes were not significant.Conclusions:During the implementation of epidemic prevention and control "10 new measures", there were obvious characteristic changes in the demand for pre-hospital emergency in Zhejiang Province, but the quality of pre-hospital emergency medical was basically stable.

Femoral neck fracture (FNF) in the elderly patients is currently a major health challenge worldwide, with excessive consumption of medical resources, high incidence of complications as well as suboptimal outcome and prognosis. Hip joint arthroplasty (HJA) has been the mainstream treatment for FNF in the elderly, but the conventional surgical approaches and techniques are still confronted with a series of bottlenecks such as dislocation, limp and limb length discrepancy. In recent years, direct anterior approach (DAA) for HJA (DAA-HJA) has been a major new choice in the field of joint replacement, which achieves improved clinical effectiveness of HJA in the treatment of elderly FNF, due to the fact that DAA approach involves the neuromuscular interface and accords with the idea of soft tissue retention and enhanced recovery after surgery. However, there is still a lack of unified understanding of standard technique and procedure of DAA-HJA in the treatment of elderly FNF. Therefore, relevant experts from the Hip Joint Group of Chinese Orthopedics Association of Chinese Medical Association, Youth Arthrology Group of Orthopedic Committee of PLA, Orthopedic Committee of Chongqing Medical Association, Branch of Orthopedic Surgeons of Chongqing Medical Doctor Association and Sport Medicine Committee of Chongqing Medical Association were organized to formulate the " Chinese expert consensus on the technical standard of direct anterior hip arthroplasty for elderly femoral neck fracture ( version 2023)" based on evidence-based medicine. This consensus mainly proposed 13 recommendations covering indications, surgical plans, prosthesis selections, surgical techniques and processes, and postoperative management of DAA-HJA in elderly patients with FNF, aiming to promote standardized, systematic and patient-specific diagnosis and treatment to improve the functional prognosis of the patients.

Objective:To investigate the emergency surgical effect of ruptured intracranial dural arteriovenous fistula (DAVF).Methods:Patients with ruptured intracranial DAVF underwent microsurgery in the Department of Neurosurgery, Nanping First Hospital Affiliated to Fujian Medical University from May 2013 to July 2022 were retrospectively included. The clinical, imaging and follow-up data were collected, and the clinical characteristics, selection of surgical methods and treatment effects of patients were summarized.Results:A total of 8 patients with DAVF were enrolled. Their age ranged from 11 to 60 years (average, 48 years). There were 7 males and 1 female. All 8 patients suffered from intracranial hemorrhage, manifested as headache and vomiting in 2 cases, simple conscious disturbance in 2 cases, conscious disturbance with cerebral hernia in 3 cases, and conscious disturbance with limb paralysis in 1 case. The fistula was located in the anterior fossa in 4 cases (including 2 cases with aneurysms), the middle fossa in 2 cases (including 1 case with moyamoya disease), the transverse sinus in 1 case, and the anterior 1/3 area of the sagittal sinus in 1 case. Cognard classification: 7 patients were type Ⅲ and 1 was type Ⅳ. After admission, all patients underwent emergency craniotomy and microsurgery to remove hematoma. Among them, 4 patients underwent decompressive craniectomy at the same time, 1 patient with moyamoya disease underwent dural turnover and temporalis muscle application at the same time, and 2 patients with aneurysms at the same location were clipped at the same time. Postoperative re-examination of head CT showed that the hematoma was cleared satisfactorily and the midline was no shift in all 8 patients. CT angiography (CTA) showed that the fistula disappeared within 2 weeks. Seven patients were followed up within 1-12 months after operation. CTA or digital subtraction angiography showed no recurrence of DAVF. Two patients with aneurysms did not have residual or recurrent aneurysms. All patients had no new neurological symptoms, and the Glasgow Outcome Scale score in 2 patients increased by 1 compared with that at discharge.Conclusion:Emergency microsurgery is an effective method for the treatment of ruptured intracranial DAVF, especially for patients with special parts or complicated hematoma, cerebral hernia, and other vascular diseases.

Objective:To analyze the clinical characteristics of adult Chinese patients with syncope.Methods:This is a cross-sectional survey study. Patients with preliminary diagnosis of syncope in the Emergency Department, Geriatrics and Cardiology Outpatient Department, or Syncope Unit of 37 hospitals in 19 provinces, autonomous regions and the Hong Kong Special Administrative Region from June 2018 to March 2021 were included in this study. The clinical features of these patients with syncope were analyzed.Results:A total of 4 950 consecutive patients with syncope were included in this study. The age was (56.3±16.8)years, and 2 604 cases (52.6%) were male. The most common type of syncope was neurally mediated syncope (2 345 (47.4%)), followed by cardiac syncope (1 085 (21.9%)), orthostatic hypotensive syncope (311 (6.3%)), and unexplained syncope accounted for nearly one third (1 155 (23.3%)). Predisposing syncope was more common in patients under 65 years of age(2 066(72.4%) vs. 786(27.6%),χ 2=136.5, P<0.001). Presyncope was more common in patients with neurally mediated syncope (1 972(79.0%) vs.1 908(73.9%), χ 2=17.756, P<0.001). Premonitory symptoms were more common in women(1 837(80.0%) vs. 1 863(73.0%),χ 2=33.432, P<0.001). Presyncope syndrome was more common in patients under 65 years of age (2 482(77.8%) vs. 1 218(73.4%),χ 2=17.523, P=0.001). Cyanosis was more common in ≥65 years old patients (271(18.2%) vs. 369(12.7%), χ 2=23.235, P<0.001). Urinary incontinence was more common in old patients aged ≥65 years(252(15.2%) vs. 345(10.8%), χ 2=19.313, P<0.001). Family history was more common in patients with cardiogenic syncope compared with other types of syncope (264(24.3%) vs. 754(19.5%), χ 2=11.899, P=0.001). Hypertention(1 480(30.5%)), coronary heart disease(1 057(21.4%)), atrial flutter and atrial fibrillation(359(7.2%)), second degree atrioventricular block(236(4.8%)) were common complications of syncope. The proportion of patients with coronary heart disease was significantly higher in cardiac syncope than that of other types of syncope(417(38.4%) vs. 640(16.6%), χ 2=241.376, P<0.001). Other common complications included cerebrovascular diseases (551 (11.1%)) and diabetes mellitus (632(12.8%)). Conclusions:Neurally mediated syncope is the most common syncope in adult Chinese population. Patients with predisposing conditions and premonitory conditions are younger. Presyncope is more common in women. The proportion of family history and coronary heart disease is higher in patients with cardiogenic syncope.

Clinical data and treatment of a patient with late-onset glutaric acidemia type Ⅱ who was admitted to the Department of Pediatric Intensive Care Unit (PICU) of Shenzhen Children′s Hospital were retrospectively analyzed.The patient is a female with the clinical manifestations of aggravated progressive proximal muscle weakness, accompanied by vomiting, abdominal pain and liver enlargement.A marked increase of transaminase, bilirubin and creatine kinase was detected, and hyperammonemia, hypoglycemia and metabolic acidosis were also observed in the patient.Blood amino acids and acylcarnitines spectra showed increased levels of various acylcarnitines.The muscle biopsy study suggested lipid storage myopathy (LSM), and the genetic test identified a homozygous mutation in the electron transfer flavoprotein dehydrogenase (ETFDH) gene.After treatment with Vitamin B 2, carnitine, coenzyme Q10 and plasma exchange, the motivate ability and biochemical parameters of the patient returned to normal.For patients with aggravated progressive proximal muscle weakness, hepatic dysfunction and increased serum creatine kinase levels, late-onset glutaric acidemia type Ⅱ should be considered.The key to early diagnosis and treatment of the disease is to improve the knowledge of it.