Objective: To investigate the daily learning time status of elementary school students and understand the implementation of Health Requirements of Daily Learning Time for Secondary and Elementary School Students (GB/T 17223-2012) in schools, so as to provide a reference for strengthening and improving school health and health education in the new era. Methods: A stratified cluster random sampling method was used to select 7 776 primary school students in Shandong Province, and a survey questionnaire was designed based on the Health Requirements for Dayily Learning Time for Secondary and Elementary School Students(GB/T 17223-2012) standard to investigate their daily learning arrangements, sleep and physical activities, and breaks between classes. Comparison of intergroup differences were used by Chi square test and Kruskal-Wallis H test. Results: About 55.88 % of primary school students for daily learning time met the standard. There was a statistically significant difference in the daily learning time achievement rate among primary school students in three grades for first and second grade, third and fourth grade and fifth and sixth grade ( Z=1 629.47, P <0.01), and the fifth and sixth grade had the highest proportion of achieving the standard (85.92%). Specifically, the proportions of students whose class hours, class numbers and morning reading time meeting the standards were 30.07%, 10.20% and 42.19%, respectively. The sleep deficiency rate of primary school studnets was 58.69%, and the physical activity deficiency rate was 65.78%; and there was a statistically significant difference in the rate of insufficient sleep time and physical activity time among primary school students of different grades ( χ 2=56.39, 95.95, P <0.01), with sixth grade students showing the highest rates for both sleep and physical activity deficiencies (64.35%, 73.37%). Additionally, 49.78% of students had recess time below the standard requirements. Conclusion The health status of daily learning time among primary school students in Shandong Province is poor, with insufficient implementation of school standards, and the implementation of standards needs to be further strengthened.

Objective To investigate the factors influencing the prognosis of complex intracranial aneurysms treated with pipeline flow-directed device(PED)and to develop a nomogram prediction model.Methods The clinical data of a total of 98 patients with complex intracranial aneurysm,who were admitted to the Anyue County People's Hospital or the Second Affiliated Hospital of Guilin Medical College of China from January 2021 to April 2023 to receive PED treatment,were retrospectively analyzed.The influencing factors that might affect the prognosis of patients with complex intracranial aneurysm were collected.According to the modified Rankin Scale(mRS)score,the patients were divided into good prognosis group(being defined as mRS ≤2 points)and poor prognosis group(being defined as mRS＞2 points).The clinical data were compared between the two groups,and a nomogram model was established and validated.Results In the 98 patients,poor prognosis was seen in 10(10.20％).The differences in age,history of hypertension,history of diabetes mellitus,clopidogrel resistance,Fisher classification,repeated aneurysm rupture,aneurysm location,aneurysm size,aneurysm neck,multiple lesions,and Hunt-Hess grade on admission between good prognosis group and poor prognosis group were statistically significant(all P＜0.05).Multivariate analysis revealed that history of hypertension,clopidogrel resistance,repeated aneurysm rupture,aneurysm location,multiple lesions,and Hunt-Hess grade were the independent factors influencing the prognosis of patients with complex intracranial aneurysm after receiving PED treatment.The AUC of the nomogram model in predicting the prognosis of PED for complex intracranial aneurysms was 0.849(95％CI=0.758-0.939).The predicted curves of the model group and validation group were basically fitted to the standard curves.The results of the decision curve analysis showed that the net benefit to patients was greater than 0 when the probability threshold of the nomogram model for predicting a poor prognosis of PED for complex intracranial aneurysms was 0.10-0.90.Conclusion The factors causing poor prognosis of PED for complex intracranial aneurysms mainly include history of hypertension,clopidogrel resistance,repeated aneurysm rupture,etc.The nomogram model established in this study can predict the risk of poor prognosis in patients with complicated intracranial aneurysm after receiving PED treatment.

Flow cytometry (FCM) is an interdisciplinary cell analysis technology that integrates optics, fluid dynamics, electronics, and computer science. While FCM is widely utilized in diagnosing and monitoring hematologic malignancies, its application in nonhematopoietic neoplasms (NHN) remains in its nascent stages. However, recent advancements in science and technology have led to the emergence of innovative FCM technologies, such as mass spectrometry flow cytometry (CyTOF) and spectral flow cytometry (SFC), offering promising avenues for their clinical application aiming to assist the clinical diagnosis of NHN patients. This review summarizes the features of fundamentals of traditional FCM, CyTOF, and SFC technologies, along with their applications and future prospective in NHN diagnosis and treatment, aiming to offer updated insights for the continued expansion and utilization of FCM technology in clinical laboratory settings.

Humans ; SARS-CoV-2 ; COVID-19 ; Antibodies ; Antibodies, Viral/therapeutic use* ; Antibodies, Neutralizing/therapeutic use*

Objective:To study the risk factors of adverse pregnancy outcomes for the diagnosis and treatment of pregnancy after cesarean section complicated with placenta previa.Methods:A national multicenter retrospective study was conducted to select a total of 747 pregnant women with the third trimester singleton pregnancy after cesarean section complicated with placenta previa from 12 tertiary hospitals in January 1st to December 31st, 2018. The risk factors of severe adverse outcomes [hysterectomy, intraoperative blood loss ≥1 000 ml, intraoperative diagnosis of placenta accreta spectrum disorders (PAS)] in pregnant women with second pregnancy complicated with placenta previa after cesarean section were investigated by logistic regression analysis. The roles of prenatal ultrasonography and magnetic resonance imaging (MRI) in the prediction of PAS and severe adverse outcomes were observed. According to whether vascular intervention was performed (uterine artery embolization or abdominal aortic balloon occlusion), the pregnant women were divided into the blocked group and the unblocked group, and the maternal and infant perinatal outcomes between the two groups were compared.Results:(1) General information: the hysterectomy rate of 747 pregnant women with second pregnancy complicated with placenta previa after cesarean section was 10.4% (78/747), the intraoperative blood loss ≥1 000 ml in 55.8% (417/747), and PAS was confirmed in 47.5% (355/747). The incidence of uterine rupture was 0.8% (6/747). (2) Analysis of risk factors for severe adverse outcomes: based on binary unconditioned logistic regression univariate and multivariate analysis, the risk factors for hysterectomy were the mode of vascular embolization and intraoperative blood loss. The probability of hysterectomy with uterine artery embolization was 5.319 times higher than that with abdominal aortic balloon occlusion (95% CI: 1.346-21.018). The risk factors of intraoperative blood loss ≥1 000 ml were the number of cesarean section delivery, ultrasonography indicated PAS and suspected PAS, intraoperative PAS and complete placenta previa. The risk factors for intraoperative PAS were uterine scar thickness, ultrasonography indicated PAS and suspected PAS, MRI indicated PAS and suspected PAS, and complete placenta previa. (3) The roles of ultrasonography and MRI in predicting PAS: the sensitivity and specificity of ultrasonography in predicting PAS were 47.5% and 88.4%; the kappa value was 0.279 ( P<0.001), with fair agreement. The sensitivity and specificity of MRI to predict PAS were 79.2% and 97.8%, respectively. The kappa value was 0.702 ( P<0.001), indicating a good agreement. The intraoperative blood loss and hysterectomy rate of pregnant women with PAS indicated by ultrasonography and MRI were significantly higher than those with PAS only by ultrasonography or MRI. (4) Influence of vascular occlusion on pregnancy outcome: there were no significant differences in intraoperative blood loss and incidence of intraoperative bleeding ≥1 000 ml between the blocked group and the unblocked group (all P>0.05). There was no significant difference in intraoperative blood loss between the pregnant women with abdominal aortic balloon occlusion, uterine artery embolization and those without occlusion ( P=0.409). The hysterectomy rate of pregnant women with uterine artery embolization was significantly higher than those with abdominal aortic balloon occlusion [39.3% (22/56) vs 10.0% (5/50), P=0.001]. Conclusions:In the third trimester of pregnancy with placenta previa after cesarean section, MRI examination has better consistency in predicting PAS than ultrasonography examination. Ultrasonography examination combined with MRI examination could effectively predict the hysterectomy rate and intraoperative blood loss. Vascular occlusion could not reduce the amount of intraoperative blood loss. The hysterectomy rate of pregnant women with uterine artery embolization is higher than those with abdominal aortic balloon occlusion.

The pathogenic microorganism laboratory is the main workplace for the detection of pathogenic microorganisms, including bacterium and virus, or related samples, which plays an important supporting role in the prevention and control of infectious disease and the fight against biological terrorist attacks. Unified biosecurity standard and sound biosecurity standard system should be established for the laboratory experiment of pathogenic microorganisms.

To promote the reasonable development of reference materials in the field of health care in China, on the basis of introducing reference materials and certified reference materials, we summarize the current management system and management norms of reference materials in our country, summarize the development status and trends of reference materials in the field of health care at home and abroad, analyze and discuss the development status, development trend and current challenges of standard materials in the fields of environmental health, medical sanitation and virus detection in China, and look forward to the major demand for reference materials in the field of health in China.

Objective:To investigate any anti-aging effect of repeated transcranial magnetic stimulation (rTMS) and explore the relationship between the effect and relief of clinical symptoms in patients with Parkinson′s disease (PD).Methods:A total of 108 PD patients were randomly divided into an rTMS group and a control group, each of 54, while another 54 healthy counterparts were selected to form a normal group. In addition to anti-PD drug therapy, the rTMS group was given daily rTMS treatment, 5 days a week for 4 weeks, while the control group received sham rTMS treatment, with no treatment of the normal group. Before the treatment and after 4 weeks of treatment as well as and 1 month after the ending of the treatment, the subjects′ clinical exercise symptoms were evaluated using the Unified Parkinson′s Disease Rating Scale (UPDRS), a timed exercise test and the 10m re-entry exercise test. Non-exercise symptoms were assessed using the Hamilton Depression Scale (HAMD), the Hamilton Anxiety Scale (HAMA) and the Mini-mental State Examination (MMSE). Fasting venous blood samples were analyzed to quantify the serum levels of tumor necrosis factor (TNF), interleukin-6 (IL-6), interleukin-1β (IL-1β) and matrix metalloproteinase-3 (MMP-3).Results:Four weeks and 1 month after the treatment, the average UPDRS scores, exercise test times and 10m re-entry exercise test results of the rTMS group were significantly better than those before treatment and significantly better than those of the control group at the same time point. The rTMS group′s average HAMA, HAMD and MMSE scores, as well as its average P300 latency and amplitude were also significantly better than those of the control group at the same time point and significantly better than those before treatment. After 4 weeks, the average MMP-3 content in the rTMS group was significantly lower than the control group′s average, and after a month the average levels of TNF, IL-6, IL-1β and MMP-3 of the rTMS group were all significantly different from those before treatment and those of the control group. The TNF, IL-6, IL-1β and MMP-3 levels were all positively correlated with the average UPDRS total score.Conclusion:High-frequency rTMS therapy can change the phenotypes related to cell senescence, and thus has good therapeutic effect on motor and non-motor symptoms of PD.

Qingweisan is one of the classical prescriptions commonly used in the treatment of oral diseases. By means of Bibliometrics， the authors collected the ancient books on Qingweisan and sifted out 411 valid data， involving 116 classics of traditional Chinese medicine. The historical origin， drug composition， indications， principle of composition， dosage，and preparation of Qingweisan were statistically analyzed， and it was found that the prescription originated from the Treatise on Spleen and Stomach（《脾胃论》） by LI Dongyuan and is composed of Rehmanniae Radix， Angelica Sinensis， Cortex Moutan， Coptidis Rhizoma and Cimicifugae Rhizoma， with the functions of clearing stomach， purging fire， cooling blood and dispersing depression. And Qingweisan was mainly used to treat toothache， headache， and preference for cold and aversion to heat caused by "excessive heat in yang brightness meridian". There were 352 indications recorded， most of which followed LI Dongyuan's theory and the expanded indications reached 70 kinds. Specifically， toothache （132） was the most， accounting for 22.49% of the total indications， followed by headache （60， 10.22%）. In addition， Qingweisan was widely used in modern clinical practice for multiple system diseases， among which oral system （197） was dominant， accounting for 72.69%， followed by skin system （28， 10.33%） and digestive system （27， 9.96%）. Although the indications were wide， the pathogenesis always belonged to "upward attack of stomach fire". Through the excavation and statistical analysis of the ancient books on Qingweisan and its modern clinical application， the authors aimed to provide a more scientific reference for the research and application of classical famous prescriptions.

Objective:To study the risk factors of adverse pregnancy outcomes for induced abortion of cesarean scar pregnancy in midtrimester.Methods:A national multicenter retrospective study was conducted. A total of 154 singletons pregnant women with cesarean scar pregnancy during the second trimester induced abortion by various reasons in 12 tertiary A hospitals were selected, their pregnant outcomes were observed and the risk factors of serious adverse outcomes were analyzed with univariate and multivariate logstic regression; the role of ultrasound and MRI in predicting placenta accreta and severe adverse outcomes was evaluated, the effectiveness of uterine artery embolization (UAE) in preventing hemorrhage in pregnant women with and without placenta accreta was compared.Results:Among 154 subjects, the rate of placenta accreta was 42.2% (65/154), the rate of postpartum hemorrhage≥1 000 ml was 39.0% (60/154), the rate of hysterectomy was 14.9% (23/154), the rate of uterine rupture was 0.6% (1/154). The risk factor of postpartum hemorrhage≥1 000 ml and hysterectomy was placenta accreta ( P<0.01). For each increase in the number of parity, the risk of placenta accreta increased 2.385 times (95% CI: 1.046-5.439; P=0.039); and the risk of placenta accreta decreased with increasing ultrasound measurement of scar myometrium thickness ( OR=0.033, 95% CI: 0.001-0.762; P=0.033). The amount of postpartum hemorrhage and hysterectomy rate in the group with placenta accreta diagnosed by ultrasound combined with MRI were not significantly different from those in the group with placenta accreta diagnosed by ultrasound only or MRI only (all P>0.05). For pregnant women with placenta accreta, there were no significant difference in the amount of bleeding and hysterectomy rate between the UAE group [median: 1 300 ml; 34% (16/47)] and the non-embolization group (all P>0.05); in pregnant women without placenta accreta, the amount of bleeding in the UAE group was lower than that in the non-embolization group (median: 100 vs 600 ml; P<0.01), but there was no significant difference in hysterectomy rate [2% (1/56) vs 9% (3/33); P>0.05]. Conclusions:(1) Placenta accreta is the only risk factor of postpartum hemorrhage≥1 000 ml with hysterectomy for induced abortion of cesarean scar pregnancy in midtrimester; multi-parity and ultrasound measurement of scar myometrium thickness are risk factors for placenta accreta. (2) The technique of using ultrasound and MRI in predicting placenta accreta of cesarean scar pregnancy needs to be improved. (3) It is necessary to discuss of UAE in preventing postpartum hemorrhage for induced abortion of cesarean scar pregnancy in midtrimester.