Objective:s To investigate the risk factors for delayed encephalopathy after acute carbon monoxide poisoning (DEACMP) in patients with acute carbon monoxide poisoning (ACOP) and to develop predictive models based on machine learning algorithms.Methods:Patients with ACOP hospitalized at the First Affiliated Hospital of Zhengzhou University from August 2019 to October 2024 were included, with the occurrence of DEACMP as the outcome measure. The dataset was randomly divided into training and validation sets at a ratio of 7:3. Lasso regression was used to select features influencing the outcome in training sets. Nine machine learning models—including Random Forest (RF), Extreme Gradient Boosting (XGBoost), and Support Vector Machine (SVM)—were constructed. Receiver operating characteristic (ROC) curves were plotted and the area under the curve (AUC) calculated for each model. Calibration curves were used to assess accuracy, and decision curve analysis (DCA) was applied to evaluate clinical utility. The SHapley Additive exPlanations (SHAP) method was employed to visualize and interpret the best-performing model.Results:A total of 264 ACOP patients were included, of whom 54 (20.5%) developed DEACMP. Lasso regression identified eight key feature variables. Based on these factors, predictive models were constructed, showing good AUC stability across the nine machine learning models in both training (0.92–0.99) and validation sets (0.85–0.91). The RF model performed best, with an AUC of 0.99 in the training set and 0.90 in the validation set; its calibration curve and DCA curve also demonstrated excellent performance. SHAP analysis of the RF model revealed the importance ranking of factors from highest to lowest as follows: Glasgow Coma Scale (GCS) score, duration of coma, age, history of coronary heart disease, CK-MB level, monocyte count, diastolic blood pressure (DBP), and drinking history.Conclusions:The RF model exhibited the highest predictive performance for DEACMP occurrence in ACOP patients. The influencing factors, ranked in order of importance from highest to lowest, are as follows: GCS score, duration of coma, age, history of coronary heart disease, CK-MB level, monocyte count, DBP, and drinking history.

OBJECTIVE: To investigate the influence of different scanning conditions on the image quality of medical electron accelerator cone-beam computed tomography (CBCT) and provide a reference for the selection of scanning conditions for different body parts. Methods Set different scanning conditions, the Catphan 503 phantom was scanned using CBCT parameters to analyze the influence of spatial resolution, noise, uniformity, spatial geometric accuracy, and low-contrast resolution on the image quality of CBCT. RESULTS: For the head, chest, and abdomen, with the increase in scanning parameter values, the noise value decreased by 47.4%, 26.1%, and 51.3% respectively, and the uniformity values decreased by 30.2%, 26.6%, and 47.9% respectively. The low-contrast resolution values decreased by 50.6%, 34.2%, and 12.0%. The influence of different scanning conditions on spatial geometric accuracy and spatial resolution is not significant. CONCLUSION Different scanning parameters have a certain influence on the image quality of medical electron accelerator CBCT. Lower scanning parameters can be selected based on individual patients to reduce the additional radiation dose, providing a reference for the safe application of CBCT image guidance in radiotherapy.
Cone-Beam Computed Tomography/instrumentation* ; Phantoms, Imaging ; Particle Accelerators

Extensive epigenetic reprogramming involves in memory CD8+ T-cell differentiation. The elaborate epigenetic rewiring underlying the heterogeneous functional states of CD8+ T cells remains hidden. Here, we profile single-cell chromatin accessibility and map enhancer-promoter interactomes to characterize the differentiation trajectory of memory CD8+ T cells. We reveal that under distinct epigenetic regulations, the early activated CD8+ T cells divergently originated for short-lived effector and memory precursor effector cells. We also uncover a defined epigenetic rewiring leading to the conversion from effector memory to central memory cells during memory formation. Additionally, we illustrate chromatin regulatory mechanisms underlying long-lasting versus transient transcription regulation during memory differentiation. Finally, we confirm the essential roles of Sox4 and Nrf2 in developing memory precursor effector and effector memory cells, respectively, and validate cell state-specific enhancers in regulating Il7r using CRISPR-Cas9. Our data pave the way for understanding the mechanism underlying epigenetic memory formation in CD8+ T-cell differentiation.
CD8-Positive T-Lymphocytes/metabolism* ; Cell Differentiation ; Chromatin/immunology* ; Animals ; Mice ; Immunologic Memory ; Epigenesis, Genetic ; SOXC Transcription Factors/immunology* ; NF-E2-Related Factor 2/immunology* ; Mice, Inbred C57BL ; Gene Regulatory Networks ; Enhancer Elements, Genetic

Objective To explore effective management methods for improving the efficiency of medical record quality control and enhancing medical record quality.Methods Based on a medical record quality control system,a full-cycle medical record quality management model was constructed,encompassing"pre-task reminders,real-time quality control during treatment,in-hospital process control,submission verification upon discharge,post-discharge terminal quality control,and re-verification af-ter archiving."Results Medical records achieved 100％quality control,and their quality significantly improved.The defect rate of medical record front pages and the delayed writing rate of surgical records in the hospital's discharged medical records continued to decline in the year before system implementation,the first year after implementation,and the second year after im-plementation.The 3-day retrieval rate of medical records increased significantly in the first year after implementation,with statis-tically significant differences in all three indicators(front page defect rate:x2=114.966,P＜0.001;delayed writing rate of sur-gical records:x2=8 056.614,P＜0.001;3-day retrieval rate:x2=798.201,P＜0.001).Conclusion The full-cycle medi-cal record management model based on a quality control system can effectively improve medical record quality and enhance man-agement efficiency.Future efforts should focus on integrating continuously optimized AI technology to strengthen system perform-ance.

Objective To analyze the quality of medical record home pages for discharged patients in a tertiary hospital in Guangzhou in 2023 based on the dual dimensions of Diagnosis-Related Groups(DRG)and Disease Intervention Program(DIP),and to provide a basis for improving the refinement of medical record home page quality management.Methods Dis-charge medical records from a tertiary general hospital in 2023 were selected.All medical records were grouped using DRG,while medical records under Guangzhou medical insurance and cross-province medical insurance implemented under DIP were simulated for DIP grouping.The writing defects in the discharge medical records were analyzed,as well as the DRG grouping,RW,and DIP standard scores of medical records with home page filling defects.Results Among 172 230 discharge medical records,171 786 were grouped into DRG,91 768 were grouped into DIP,and 91 604 were grouped into both DRG and DIP.A significant positive correlation was found between RW and DIP standard scores(r2=0.681,P＜0.001).Among the 91 604 medical records grouped into both DRG and DIP,1 942(2.12％)had writing defects,including 837(0.91％)with home page defects.DRG groups with more home page defect records included NC15,HK2,EJ13,EB15,HJ13,and RE19.Conclusion Quality defects in medical record home pages impact the accuracy of DRG and DIP grouping.Systematic measures such as strengthening medical record writing training and establishing scientific reward and punishment mechanisms should be implemented to provide data sup-port for the further advancement of DRG/DIP payment reform.

Objective:To investigate the effects of sampling methods on pathological assessment of resected non-small cell lung cancer (NSCLC) specimen with tumor maximum diameter >3 cm after neoadjuvant therapy.Methods:NSCLC patients with a large tumor (diameter >3 cm) that were resected after neoadjuvant therapy from June 2020 to July 2023 were retrospectively collected in the Department of Pathology, Shanghai Pulmonary Hospital, Shanghai, China. Sampling methods of the tumor bed were performed in accordance with the international and Chinese experts recommendations for resection specimens following neoadjuvant therapy (recommended sampling method, RSM), and all remaining tumor bed lesions were completely sampled after recommended sampling (complete sampling method, CSM). The difference of pathological response assessment of residual viable tumor (RVT) between RSM and CSM was examined.Results:A total of 90 cases were identified and analyzed, including 39 cases of squamous cell carcinoma and 51 cases of adenocarcinoma, treated with neoadjuvant therapy including chemotherapy in 22 cases (24.4%), targeted therapy in 14 cases (15.6%), and chemoimmunotherapy in 54 cases (60.0%). There were 62 males and 28 females with an average age of (62.7±17.9) years. The average tumor maximum diameter was 4.3 cm (range, 3.1-8.0 cm). The average number of sampled blocks was 8 blocks (range, 5 to 16) and 15 blocks (range, 8 to 36) per case by RSM and CSM, respectively. According to the definition of major pathological response (MPR) in which RVT is ≤10%, the numbers of patients with MPR were 34 cases by RSM and 30 cases by CSM, respectively. Four cases showed inconsistent RVT between the two methods, including one case of squamous cell carcinoma and three cases of adenocarcinoma. The RVT of the four inconsistent cases was 7%, 7%, 5% and 9% (MPR by RSM), and 15%, 15%, 15% and 20% (non-MPR by CSM), respectively. The kappa values of MPR consistency evaluated by the two sampling methods were 0.893 for all cases, 0.906 for squamous cell carcinoma cases and 0.751 for adenocarcinoma cases. According to MPR cut-off of 65% for invasive primary adenocarcinoma, 24 cases and 20 cases achieved MPR by RSM and CSM, respectively. Of the four inconsistent cases, the RVT by RSM was 60% in three cases and 65% in one case (MPR), whereas the RVT by CSM was 70% in three cases and 75% in one case (non-MPR). The kappa value of the two sampling methods was 0.741.Conclusions:There is high consistency between RSM and CSM in the pathological assessment of post-treatment responses in resected NSCLC specimens with tumor maximum diameter larger than 3 cm. When the percentage of RVT cells is close to MPR, re-evaluation of the specimen is required and CSM may be necessary to accurately evaluate the degree of pathological remission, assist in clinical postoperative treatment, and predict patient prognosis.

Objective:To determine the clinical issues in the Clinical practice guidelines for postoperative pain management in adults (2024 edition). Methods:A preliminary list of clinical issues for the guidelines was developed through literature review, clinical surveys, and expert interviews. This was followed by two rounds of Delphi questionnaire surveys, with quality control and statistical analysis conducted using expert positive coefficient, mean item scores, full score ratio, coefficient of variation, Cronbach′s α coefficient, and expert authority level to finalize the list of clinical issues.Results:The experts participating in the Delphi questionnaire surveys had multidisciplinary collaborative backgrounds and regional representativeness, with a high level of authority. The overall positive coefficient of expert participation in the surveys was 78.9%. Through two rounds of the Delphi method and based on the screening criteria of a mean score ≥3.5, coefficient of variation ≤30%, and full score ratio ≥30%, 17 clinical issues were ultimately included following an expert consensus meeting.Conclusions:Through the Delphi method and rigorous quality control, the clinical issues in the Clinical practice guidelines for postoperative pain management in adults (2024 edition) are determined, laying a foundation for the subsequent development of the guidelines.

Objective:To evaluate the association between body temperature and duration of mechanical ventilation in the intensive care unit (ICU) among patients after coronary artery bypass grafting (CABG).Methods:Clinical data from patients, aged >18 yr, undergoing primary isolated CABG, between 2008 and 2019, were extracted from the Medical Information Mart for Intensive Care Ⅳ version 2.0 database. Participants were stratified into 3 groups based on the mean body temperature in ICU: hypothermia group (<36.0 ℃), normothermia group (36.0 ℃ ≤ temperature <37.3 ℃), and hyperthermia group (≥37.3 ℃). Multivariable linear regression and linear curve fitting were performed to assess the association between body temperature and duration of mechanical ventilation.Results:A total of 4, 588 patients were finally included in the statistical analysis, including 133 cases in hypothermia group, 4, 177 cases in normothermia group and 278 cases in hyperthermia group. The duration of mechanical ventilation was significantly prolonged in both hypothermia and hyperthermia groups compared with normothermia group ( P<0.05). The results of multivariable linear regression demonstrated that each 1 ℃ increase in body temperature was associated with a 2.43 h reduction in the duration of mechanical ventilation in hypothermia group ( P<0.001), and each 1 ℃ temperature elevation corresponded to a non-significant reduction of 0.12 h in hyperthermia group ( P=0.851). The results of linear curve fitting revealed a U-shaped relationship between body temperature and duration of mechanical ventilation, and an inflection point was identified at 36.71 ℃, with duration of mechanical ventilation prolonged with temperatures either below or above this threshold ( P<0.05). Conclusions:Hypothermia during ICU stay following CABG may lead to prolonged mechanical ventilation in patients.

BACKGROUND:Elderly people with mild cognitive impairment experience a decline in postural control ability due to cognitive function decline,making them more prone to falls.The dual-task paradigm,which more closely mirrors daily life,is often used to assess postural control ability.However,previous dual-task studies on cognition and postural control in elderly people with mild cognitive impairment have mainly focused on the external manifestations of postural control,with direct evidence of central nervous mechanisms still lacking.OBJECTIVE:To investigate the activation characteristics of the cerebral somatic sensorimotor cortex in the elderly people with mild cognitive impairment while performing the dual task of stance postural control and spatial working memory.METHODS:Participants were screened using the Montreal Cognitive Assessment,enrolling 16 elderly people with mild cognitive impairment and 17 healthy older people.They performed five task tests:spatial working memory,dual-feet balance stance,Romberg stance,dual task of dual-feet balance stance and spatial working memory,and dual task of Romberg stance and spatial working memory.Functional near-infrared spectroscopy and a three-dimentional force platform were used simultaneously to collect data on cerebral cortex(20 channels)hemodynamics and center of pressure swing trajectory.RESULTS AND CONCLUSION:In Romberg stance,dual task of dual-feet balance stance and spatial working memory,and dual task of Romberg stance and spatial working memory tasks,center of pressure displacements in anterior-posterior and medial-lateral directions were significantly greater in mild cognitive impairment elderly people than that in normal elder people(P<0.05).In dual task of dual-feet balance stance and spatial working memory task,ΔHbO2 at channel 15(right pre-motor cortex and supplementary motor area)was significantly greater in mild cognitive impairment elderly people than that in normal elder people(P<0.05).In dual task of Romberg stance and spatial working memory task,ΔHbO2 at channels 15 and 17(right pre-motor cortex and supplementary motor area)was significantly greater in the elderly people with mild cognitive impairment compared with the healthy older people(P<0.05).In dual task of Romberg stance and spatial working memory task,a significantly positive correlation in the elderly people with mild cognitive impairment(r=0.659,P<0.05)and a strong positive correlation in the healthy older people were observed between center of pressure displacement in medial-lateral direction and ΔHbO2 at channel 15(r=0.840,P<0.05).The results indicate that compared with the cognitively normal healthy older people,the elderly people with mild cognitive impairment showed weaker stance postural control capability during the dual task of stance postural control and spatial working memory,with higher activation levels in the right pre-motor cortex and supplementary motor area.The increased brain resource allocation for lateral postural control may represent the brain compensation mechanism in the elderly people with mild cognitive impairment due to cognitive decline leading to weakened stance postural control ability.

Objective To investigate the current situation of ethical system construction in the publication of medical science and technology journals in universities,to explore the problems in the construction of ethical system in the publication of medical science and technology journals in universities,and propose corresponding suggestions.Methods A total of 55 medical university journals included in the 2023 edition of the China Science and Technology Journal Citation Reports(Core Edition)Natural Science Volume were selected as the research subjects,and their publishing ethics system construction was investigated through the journal's official website.Results Only 18 journals have clear publishing ethics sections on their official websites,covering publishing ethics systems related to authors,reviewers,editors,and publishers,while other journals only mention publishing ethics systems related to authors,reviewers,editors,and publishers in their submission guidelines,peer reviews,and related statements published on their respective official websites,and the coverage is incomplete and the publishing process is opaque.Conclusion Ethical systems and strengthen the prevention and handling of academic misconduct,to strengthen the promotion of publishing ethics system and enhance the integrity awareness of authors,to promote transparency in the publishing process and strengthen supervision and to early warning of various publishing processes.