Objective:To investigate the main occupational hazards,occupational protection facilities and workers'health examination in 17 plywood manufacturing enterprises in Guangxi,so as to provide valuable basis for ensuring workers'physical and mental health.Methods:A total of 17 plywood enterprises in Guangxi were selected as the observation objects.Through the occupational hazard assessment survey,the occupational hazards in the working environment and the collection of workers'occupational health examination data,the main occupational health problems were comprehensively analyzed and evaluated.Results:The over-standard rates of wood dust,formaldehyde,noise,and high temperature in 17 plywood manufacturing enterprises were 5.6%,28.1%,24.9%,and 29.1%,respectively.The noise in 17 enterprises exceeded standards,the mood dust and formaldehyde in 5 enterprises exceeded standards,and high temperature in 2 enterprises exceeded standards.The coincidence rate of dustproof and poisonproof facilities in production protection was 98.3%,the coincidence rate of heat-proof facilities was 88.2%and the coincidence rate of noise protection facilities was 76.5%.The coincidence rate of wearing and using personal protective equipment was 52.9%,and the coincidence rate of installing eyewash spray devices was 58.8%.The total physical examination rate in 17 enterprises was 42.6%(705/1 654),and the abnormal detection rate of physical examination was 14.6%,among which the abnormal detection rates of hearing,chest X-ray,and lung function were 7.4%,2.1%,and 1.7%,respectively.Conclusions:The main occupational health problems in 17 plywood manufacturing enterprises in Guangxi are wood dust,formaldehyde,noise,and high temperature,especially noise.The prevention and control effects of wood dust and formaldehyde are good,but the prevention and control measures for high temperature and noise need to be further strengthened.

Methods: The median sagittal diameter and transverse diameter of the spinal canal from C2 to C7 were measured on CT images. The ratio of the median sagittal diameter to the transverse diameter was calculated. Accordingly, the spinal canal shape of each segment was classified into four, and the specific criteria of lunar phase classification were determined through linear discriminant analysis based on the ratio of the median sagittal diameter to the transverse diameter. The inter-rater reliability of the classification was explored using Kappa coefficients. Finally, the morphology of the different segments of the cervical spinal canal in healthy volunteers was revised and compared. Results: According to the ratio of the median sagittal diameter and the transverse diameter of the cervical spinal canal, the lunar phase classification of the cervical bony spinal canal was determined as follows: full-moon >0.65, 0.55< convex-moon ≤0.65, 0.46≤ quarter-moon ≤0.55, and residual-moon <0.46. The Kappa values of C2–C7 were 0.851, 0.958, 0.823, 0.927, 0.793, and 0.946, and the Kappa value of all C2–C7 segments was 0.854 that mainly presented two forms of full-moon (76.5%) and convex-moon (23.0%). A quarter-moon spinal canal was mainly distributed in C3, C4, C5, and C6; a residual-moon spinal canal was mainly distributed in C4 and C5; and the morphological distribution of C4 and C5 were similar (p>0.05). The frequency of the spinal canal of the residual-moon type was the highest, and the full-moon (6.5%) and residual-moon (7.5%) types of C7 were rare. Conclusions The morphological classification of the cervical spinal canal was established to present anatomical variations. The classification showed good inter-rater reliability.

Chinese medicine self-assembly nano-strategies（CSAN） is to utilize the self-assembly property of Chinese medicine components， so that the Chinese medicine components can self-assemble to form structurally stable nano-preparations through non-covalent interactions. The formation of Chinese medicine self-assembly nano-preparations is often a synergistic result of a variety of non-covalent interactions， and many Chinese medicine monomers are susceptible to self-assembly due to their structural characteristics， and the phenomenon of self-assembly of Chinese medicine is also common in the decoction of single or compound Chinese medicine， which has attracted the attention of researchers. It is found that CSAN can improve the solubility and bioavailability of active components in Chinese medicine， which is of positive significance for the development and application of insoluble components of Chinese medicine. The self-assembly phenomenon of Chinese medicine decoction is closely related to the therapeutic efficacy， and the study of self-assembly phenomenon of Chinese medicine will bring a new perspective for the explanation of the mechanism of Chinese medicine decoction. At the same time， traditional Chinese medicine（TCM） has unique advantages in the field of anti-tumor. The application of CSAN in the field of oncology can not only exert the anti-tumor effect of the active components of Chinese medicine directly， but also act as a natural nano-carrier to carry chemotherapy drugs for combination chemotherapy， improve the targeting of drugs， enhance the anti-tumor efficacy， and reduce the side effects of chemotherapy， which has excellent anti-tumor potential. The preparation method of Chinese medicine self-assembly nano-preparations is simple， low cost， and has better safety than traditional nano-preparations， which is conducive to the promotion of the clinical transformation of nano-preparations， and also helps to provide new strategies and perspectives for promoting the modernization of TCM. Therefore， based on a large number of researches in this field in recent years， this paper reviewed the formation mechanism， different assembly forms， formation conditions and stability of Chinese medicine self-assembly nano-preparations by searching databases such as China national knowledge infrastructure（CNKI）， PubMed， WanFang data and VIP， and summarized the application of CSAN in different tumor therapies， providing a reference for further research on CSAN.

【Objective:】 To understand the current situation and influencing factors of ethical knowledge, attitude, and practice (KAP) among clinical researchers, enhance their ethical awareness, and improve the quality of clinical researches. 【Methods:】 A self-designed questionnaire was used to conduct a convenient sampling survey of medical staff who have participated in clinical study. 【Results:】 A total of 6,021 subjects were investigated, with males accounting for 28.46% and females accounting for 71.53%. The average age of them was (37.47±11.46) years old. The total score of ethics and the mean scores of the three dimensions of knowledge, attitude and practice were (70.62±12.99), (59.63±12.50), (79.55±19.62) and (74.92±18.29), respectively. Multiple linear regression analysis showed that researchers with male, tertiary hospitals, doctors, ethics-related part-time jobs, postgraduate education, associate senior title or above, and training experience scored higher (P<0.05). 【Conclusion:】 Ethical attitudes have a significant mediating effect between knowledge and practice, accounting for 62.72% of the total effect. Researchers recognize the importance of ethics, but it is urgent to strengthen their knowledge learning and practical application.

The acute combination fractures of the atlas and axis in adults have a higher rate of neurological injury and early death compared with atlas or axial fractures alone. Currently, the diagnosis and treatment choices of acute combination fractures of the atlas and axis in adults are controversial because of the lack of standards for implementation. Non-operative treatments have a high incidence of bone nonunion and complications, while surgeries may easily lead to the injury of the vertebral artery, spinal cord and nerve root. At present, there are no evidence-based Chinese guidelines for the diagnosis and treatment of acute combination fractures of the atlas and axis in adults. To provide orthopedic surgeons with the most up-to-date and effective information in treating acute combination fractures of the atlas and axis in adults, the Spinal Trauma Group of Orthopedic Branch of Chinese Medical Doctor Association organized experts in the field of spinal trauma to develop the Evidence-based guideline for clinical diagnosis and treatment of acute combination fractures of the atlas and axis in adults ( version 2023) by referring to the "Management of acute combination fractures of the atlas and axis in adults" published by American Association of Neurological Surgeons (AANS)/Congress of Neurological Surgeons (CNS) in 2013 and the relevant Chinese and English literatures. Ten recommendations were made concerning the radiological diagnosis, stability judgment, treatment rules, treatment options and complications based on medical evidence, aiming to provide a reference for the diagnosis and treatment of acute combination fractures of the atlas and axis in adults.

Objective:To investigate the diagnostic efficacy of MRI-based or CT-based measurements and the combined evaluation methods for preoperative bone quality assessment in patients with cervical degenerative diseases.Methods:Patients who underwent spine surgery for cervical degenerative diseases at the Department of Orthopedics, Huashan Hospital, Fudan University from September 2020 to March 2022 with available preoperative X-ray, CT, MRI and dule energy X-Ray absorptiometry (DEXA) data were included in this study. Vertebral bone quality score (VBQ) based on MRI T1-weightedimages and CT Hounsfiled unit (HU) values of the cervical spine were measured, and a combined diagnostic formula based on the binary logistic regression was constructed. The patients were divided into normal bone mass (T≥-1.0) and osteopenia/osteoporosis groups (T<-1.0). The student's t-test and Chi-square test were performed for comparisons between groups. The Pearson correlation coefficient was also used to investigate the correlation between DEXA-T scores, cervical VBQ and CT HU values. In addition, receiver operating characteristic curve (ROC) were plotted to explore the diagnostic efficacy of VBQ, CT HU and their combined diagnosis. Meanwhile, the corresponding sensitivity and specificity were obtained. Results:A total of 71 patients were included in this study (17 in the normal group and 54 in the osteopenia/osteoporosis group). The student's t-test showed that VBQ (2.90±0.70 vs. 3.83±0.83, t=4.23, P<0.001) and CT HU values (370.26±85.38 vs. 295.20±67.96, t=3.73, P=0.002) were significantly different between the two groups. The area under the ROC curve (AUC) for VBQ and CT values of the cervical spine were 0.81 and 0.75, respectively, and the AUC for the combined diagnostic value constructed on the basis of both was 0.85. Applying VBQ scores alone had a diagnostic sensitivity of 80% and a specificity of 70%, and the combined diagnosis with VBQ and CT HU had a sensitivity of 90% and a specificity of 75%. Person correlation analysis showed a significant correlation between DEXA T value, cervical VBQ value and CT HU value. The detailed formula was: DEXA T score=-0.63×cervical VBQ+0.64 ( r=-0.55, P<0.001), CT HU value=-40.20×cervical VBQ+458.40 ( r=-0.45, P<0.001), DEXA T score=0.006×CT HU-3.47 ( r=0.45, P<0.001). Conclusion:This study confirmed the feasibility of using cervical VBQ values, CT HU values and combined diagnostics for preoperative bone density screening in patients with degenerative cervical spine diseases. This method allows surgeons to perform an initial preoperative bone density screening based on the patient's existing imaging data, and thus could aid in confirming the indication and scheme of surgery. The method could be a powerful tool for preoperative bone density assessment screening in patients with cervical degenerative diseases.

Objective To evaluate the clinical value of 3D reconstruction in the single utility-port thoracoscopic segmentectomy of early stage NSCLC by propensity score matching (PSM). Methods We retrospectively analyzed clinical data of 150 early stage NSCLC patients undergoing single utility-port thoracoscopic segmentectomy. The patients were divided into reconstruction group (n=58) and non-reconstruction group (n=92) according to 3D reconstruction. PSM was performed on two groups to compare perioperative outcomes. Results Procedures were successfully completed on all patients, without perioperative death. In each group, 43 patients were successfully matched after PSM on the basis of 8 confounding factors, age, gender, smoking status, BMI, maximum tumor diameter on CT, tumor location, % FEV1 and type of planned segmentectomy. After PSM, in complex segmentectomy, the patients in the reconstruction group had shorter operation time (155.77±30.17 vs. 212.94±66.49min, P < 0.001) and less blood loss (46.00±25.94 vs. 88.79±68.36ml, P=0.002), compared with the non- reconstruction group. Conclusion Preoperative 3D reconstruction could help improve the efficiency of single utility-port thoracoscopic surgery for complex segmentectomy and reduce intraoperative bleeding.

Objective:To investigate the expression of Per2 mRNA, HDAC1 mRNA and E-cadherin mRNA in esophageal cancer cells and their significance.Methods:The experimental study was conducted. Human normal esophageal epithelial cells as the control group and human esophageal cancer cell line KYSE-150 cells as the experimental group were cultured in vitro to logarithmic growth stage. Observation indicators: (1) the proliferation of cells; (2) the migration and invasion of cells; (3) the expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA in cells of initial physiological state; (4) the expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA after cells were treated with Per2-agonists or inhibitors; (5) the expression of Per2 mRNA and E-cadherin mRNA after cells were treated with HDAC1 inhibitors. Measurement data with normal distribution were represented as Mean± SD, the t test was used for comparison within groups and the t test or ANCOVA were used for comparison between groups. Results:(1) The proliferation of cells: the cell proliferation of the experimental group and control group were 0.90%±0.14% and 0.52%±0.08%, with a significant difference between the two groups ( t=5.166, P<0.05). (2) The migration and invasion of cells: the numbers of cell migration and invasion for the experimental group were 173±41 and 86±27, versus 50±15 and 21±9 for the control group, with significant differences between the two groups ( t=6.274, 5.153, P<0.05). (3) The expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA in cells of initial physiological state: the expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA in cells of initial physiological state for the experimental group was 11.7±2.7, 20.4±6.6, and 12.4±2.5, respectively, versus 2.4±0.5, 8.5±2.2, and 27.3±4.5 for the control group, with significant differences between the two groups ( t=5.782, 2.982, -5.034, P<0.05). (4) The expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA after cells were treated with Per2-agonists or inhibitors: after cells were treated with Per2-agonists, the expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA were 13.1±2.2, 22.4±6.2, 16.6±4.2 for the experimental group, and 9.9±3.1, 18.4±5.6, 15.3±2.3 for the control group, respectively. There was no significant difference in the expression of Per2 mRNA, HDAC1 mRNA, or E-cadherin mRNA of the experimental group between cells being treated with and without Per2-agonists ( t=-4.300, 10.087, -4.187, P>0.05). There were significant differences in the expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA of the control group between cells being treated with and without Per2-agonists ( t=-4.846, 3.501, 9.294, P<0.05). There was no significant difference in the expression of Per2 mRNA or E-cadherin mRNA between the experimental group and control group after cells were treated with Per2-agonists ( F=1.000, 7.582, P>0.05), while there was a significant difference in the expression of HDAC1 mRNA between the two groups ( F=1.724, P<0.05). After cells were treated with Per2-inhibitors, the expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA were 4.1±1.7, 7.5±2.2, 22.8±4.2 for the experimental group, and 3.1±0.9, 9.3±3.2, 28.4±5.8 for the control group, respectively. There were significant differences in the expression of Per2 mRNA, HDAC1 mRNA, and E-cadherin mRNA of the experimental group between cells being treated with and without Per2-inhibitors ( t=12.124, 5.105, -10.245, P<0.05). There was no significant difference in the expression of Per2 mRNA, HDAC1 mRNA, or E-cadherin mRNA of the control group between cells being treated with and without Per2-inhibitors ( t=-2.815, 1.568, -1.439, P>0.05). There were significant differences in the expression of Per2 mRNA and E-cadherin mRNA after cells were treated with Per2-inhibitors between the experimental group and control group ( F=22.965, 82.134, P<0.05), while there was no significant difference in the expressions of HDAC1 mRNA between the two groups ( F=6.416, P>0.05). (5) The expression of Per2 mRNA and E-cadherin mRNA after cells were treated with HDAC1 inhibitors: after cells were treated with HDAC1 inhibitors, the expression of Per2 mRNA and E-cadherin mRNA were 13.4±3.5, 24.2±3.4 for the experimental group, and 3.1±1.2, 26.8±5.2 for the control group, respectively. There was no significant difference in the expression of Per2 mRNA of the experimental group between cells being treated with and without HDAC1-inhibitors ( t=-3.959, P>0.05). There was a significant difference in the expression of E-cadherin mRNA of the experimental group between cells being treated with and without HDAC1-inhibitors ( t=-21.977, P<0.05). There was no significant difference in the expression of Per2 mRNA or E-cadherin mRNA of the control group between cells being treated with and without HDAC1-inhibitors ( t=-1.440, 1.058, P>0.05). After cells were treated with HDAC1-inhibitors, there was no significant difference in the expressions of Per2 mRNA between the experimental group and control group ( F=2.004, P>0.05), while there was a significant difference in the expression of E-cadherin mRNA between the two groups ( F=325.800, P<0.05). Conclusions:Human esophageal cancer cells have an elevated expression of Per2 mRNA and HDAC1 mRNA, and a reduced expression of E-cadherin mRNA. The overexpression of Per2 mRNA may activate the expression of downstream targeting protein HDAC1, and inhibit the expression of cell surface E-cadherin mRNA.

By analyzing the main problems existing in the current management of medical devices for clinical trials, this study proposes a feasible management model and specific requirements for acceptance, distribution, storage and recovery combining with the characteristics of medical consumable equipment and diagnostic reagent, which provides a favorable guarantee for the authenticity and reliability of clinical trials.
Clinical Trials as Topic ; Equipment and Supplies/standards* ; Indicators and Reagents/standards* ; Reproducibility of Results ; Research Design/standards*

Guidance and reference are provided for protocol designer. The classification of laser medical devices are introduced. The key points such as the selection of control group, evaluation indicators and method, criteria of inclusion and exclusion, and application of blinded, etc. are discussed, and the importance of management of defects in medical device is emphasized.
Clinical Trial Protocols as Topic ; Equipment and Supplies ; Lasers ; Research Design