Objective To analyze the epidemiological characteristics of acute respiratory infections(ARIs)during the autumn-winter season in Beijing,providing evidence for the prevention,control,diagnosis,and treatment of ARIs.Methods A convenience sampling method was employed,enrolling patients who visited Peking Union Medical College Hospital(PUMCH)between September 2023 and February 2024 due to ARIs.Na-sopharyngeal swabs were collected,and real-time fluorescence quantitative PCR was used to detect six common respiratory pathogens[influenza A virus(FluA),influenza B virus(FluB),human rhinovirus(HRV),Myco-plasma pneumoniae(MP),respiratory syncytial virus(RSV),and adenovirus(ADV)],as well as SARS-CoV-2 infection.The distribution patterns of pathogen infections were analyzed.Results A total of 5556 eligible patients were included.The overall positivity rate for the six common respiratory pathogens was 63.7％,with sin-gle-pathogen positivity at 54.0％,dual-pathogen positivity at 8.9％,and triple or more pathogen positivity at 0.7％.The predominant pathogens detected were FluA(16.1％)and RSV(15.7％),followed by ADV(11.1％),MP(11.1％),HRV(10.0％),and FluB(10.0％).No significant difference in overall pathogen positivity was observed between genders.However,significant differences were found between autumn and winter(x2=34.617,P＜0.001)and among pediatric,young/middle-aged,and elderly patients(x2=422.38,P＜0.001).Specifically,MP(x2=8.647,P=0.003),FluA(x2=131.932,P＜0.001),and HRV(x2=174.199,P＜0.001)exhibited significantly higher positivity rates in autumn than in winter,whereas FluB was more prevalent in winter(x2=287.894,P＜0.001).In pediatric patients,MP,RSV,HRV,and ADV positivity rates were significantly higher than in young/middle-aged and elderly patients(all P＜0.001),whereas FluB was more common in young/middle-aged patients(both P＜0.001).The positivity rates of the six common respiratory pathogens significantly declined during the SARS-CoV-2 epidemic period,exhibiting an asynchronous seasonal pattern.Conclusions The prevalence of respiratory pathogens in Beijing is associated with age and season.Tar-geted preventive measures should be implemented in different seasons and for key populations.

The prevention and control of health-associated infections are essential for safeguarding patients and im-proving medical quality during the process of medical service.Real-time and effective prevention and control meas-ures can not only remarkably reduce the risk of infections among the patients and health care workers but also are the essential conditions for high-quality medical service.As a convenient,rapid and highly efficient onsite diagnos-tic tool,point-of-care testing(POCT)can rapidly identify the source of infection and start precise control inter-ventions at the spot of infection,which may remarkably reduce the incidence of health-associated infection.In ad-dition,the real-time prevention and control strategies for infections can provide guidance for appropriate treatment of infections,reduce the emergence and transmission of drug-resistant strains,improve the prognosis of patients and further cut the overall medical cost.

The prevention and control of health-associated infections are essential for safeguarding patients and im-proving medical quality during the process of medical service.Real-time and effective prevention and control meas-ures can not only remarkably reduce the risk of infections among the patients and health care workers but also are the essential conditions for high-quality medical service.As a convenient,rapid and highly efficient onsite diagnos-tic tool,point-of-care testing(POCT)can rapidly identify the source of infection and start precise control inter-ventions at the spot of infection,which may remarkably reduce the incidence of health-associated infection.In ad-dition,the real-time prevention and control strategies for infections can provide guidance for appropriate treatment of infections,reduce the emergence and transmission of drug-resistant strains,improve the prognosis of patients and further cut the overall medical cost.

Objective To identify the exact locations of the brain being irradiated in advanced nasopharyngeal carcinoma(NPC)patients during radiotherapy,and to analyze the differences in brain dose distribution between advanced NPC patients treated with intensity-modulated radiotherapy(IMRT)and volumetric modulated arc therapy(VMAT).Methods Based on the CT brain template provided by the Montreal Neurological Institute,the brain dose distribution was analyzed with voxel-based method.Results For advanced NPC patients,VMAT plans did not demonstrate superiority in normal brain tissue sparing,while IMRT performed better,with advantages observed in regions such as the brainstem,the posterior lobe of the cerebellum,the anterior lobe of the cerebellum,temporal lobes,occipital lobes,limbic lobes,and certain areas of the subcortical regions.Conclusion IMRT is advantageous over VMAT in protecting the normal brain tissues in advanced NPC patients.

Objective To investigate the clinical and practical value of transvaginal endoscopic technology by using traditional hysteroscope in the diagnosis and treatment of intrauterine lesions in asexual women of childbearing age.Methods A retrospective analysis was conducted on 98 cases of hysteroscopic surgery in asexual women of childbearing age admitted from January 2005 to May 2024.Transvaginal endoscopic technology was applied for hysteroscopic examination and/or treatment by using traditional hysteroscope.Results A total of 62 cases underwent electrocautery after cervical dilation with a dilation rod,including 43 cases of endometrial polyps,15 cases of submucosal fibroids,and 4 cases of cervical polyps.The remaining 36 cases underwent endometrial biopsy or curettage by using a microscope,and all obtained endometrial biopsy pathology.One case of hymen laceration about 0.3 cm in length was sutured with 5-0 absorbable suture for one stitch.For the remaining cases,the hymen remained intact.Conclusion Using transvaginal endoscopic technology with traditional hysteroscope can complete hysteroscopic examination or surgical treatment without damaging the hymen,which is suitable for asexual women of childbearing age.

Objective:To evaluate the accuracy of continuous photoplethysmography algorithms for atrial fibrillation diagnosis and atrial fibrillation burden evaluation via wearable devices.Methods:This study was a self-controlled prospective cohort study. A total of 254 consecutive inpatients were recruited from the Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University from September 2022 to November 2022. All participants were required to wear two devices at the same time: (1) an electrocardiogram (ECG) watch for acquisition of photoplethysmography (watch-recorded-photoplethysmography, W-PPG) and electrocardiogram (watch-recorded-electrocardiogram, W-ECG); (2) an ECG patch for acquisition of electrocardiogram (patch-recorded-electrocardiogram, P-ECG). The results were measured in 30 s data segments and individual participants, separately, which were calculated for sensitivity and specificity by comparing them with the results of expert-read ECG according to the receiver operating characteristic curve. Four groups were separated according to the proportion of the atrial fibrillation burden, and the difference of atrial fibrillation burden from algorithm and expert-read ECG was calculated.Results:All 254 subjects completed the study. The mean age of participants was (63.04±11.04) years old, 99 (38.98%) of them were female, and 97 (38.19%) patients had persistent atrial fibrillation. Expert-read ECG results were taken as standard criteria in all calculations. The P-ECG algorithm had a sensitivity of 94.86% (95% CI: 94.81%-94.91%) and a specificity of 99.30% (95% CI: 99.28%-99.31%) when measured in data segments. The W-PPG algorithm had a sensitivity of 96.07% (95% CI: 95.97%-96.18%) and a specificity of 98.62% (95% CI: 98.59%-98.65%). When measured in terms of individual participants, the P-ECG algorithm had a sensitivity of 92.55% (95% CI: 87.57%-95.71%) and a specificity of 96.39% (95% CI: 93.45%-98.09%), while the W-PPG algorithm had a sensitivity of 93.71% (95% CI: 88.75%-96.67%) and a specificity of 89.62% (95% CI: 85.61%-92.65%). When measured in terms of a single acquisition of W-ECG records, the W-ECG algorithm had a sensitivity of 92.04% (95% CI: 88.14%-94.78%) and a specificity of 96.19% (95% CI: 94.35%-97.47%). For atrial fibrillation burden assessment, the difference between the W-PPG analysis results and the expert-read ECG results was less than 2% in all burden distribution intervals. Conclusions:Continuous photoplethysmography algorithm applied to wearable devices to detect atrial fibrillation is a feasible strategy. Taking expert-read ECG results as standard, continuous monitoring of PPG by a smartwatch is highly accurate for atrial fibrillation diagnosis and can also be used to effectively complete atrial fibrillation burden assessment.

To analyze the epidemiological characteristics of acute respiratory infections (ARIs) during the autumn-winter season in Beijing, providing evidence for the prevention, control, diagnosis, and treatment of ARIs.

Objective To investigate the clinical and practical value of transvaginal endoscopic technology by using traditional hysteroscope in the diagnosis and treatment of intrauterine lesions in asexual women of childbearing age.Methods A retrospective analysis was conducted on 98 cases of hysteroscopic surgery in asexual women of childbearing age admitted from January 2005 to May 2024.Transvaginal endoscopic technology was applied for hysteroscopic examination and/or treatment by using traditional hysteroscope.Results A total of 62 cases underwent electrocautery after cervical dilation with a dilation rod,including 43 cases of endometrial polyps,15 cases of submucosal fibroids,and 4 cases of cervical polyps.The remaining 36 cases underwent endometrial biopsy or curettage by using a microscope,and all obtained endometrial biopsy pathology.One case of hymen laceration about 0.3 cm in length was sutured with 5-0 absorbable suture for one stitch.For the remaining cases,the hymen remained intact.Conclusion Using transvaginal endoscopic technology with traditional hysteroscope can complete hysteroscopic examination or surgical treatment without damaging the hymen,which is suitable for asexual women of childbearing age.

Acetaminophen (APAP) overdose is a major cause of liver injury. Neural precursor cell expressed developmentally downregulated 4-1 (NEDD4-1) is an E3 ubiquitin ligase that has been implicated in the pathogenesis of numerous liver diseases; however, its role in APAP-induced liver injury (AILI) is unclear. Thus, this study aimed to investigate the role of NEDD4-1 in the pathogenesis of AILI. We found that NEDD4-1 was dramatically downregulated in response to APAP treatment in mouse livers and isolated mouse hepatocytes. Hepatocyte-specific NEDD4-1 knockout exacerbated APAP-induced mitochondrial damage and the resultant hepatocyte necrosis and liver injury, while hepatocyte-specific NEDD4-1 overexpression mitigated these pathological events both in vivo and in vitro. Additionally, hepatocyte NEDD4-1 deficiency led to marked accumulation of voltage-dependent anion channel 1 (VDAC1) and increased VDAC1 oligomerization. Furthermore, VDAC1 knockdown alleviated AILI and weakened the exacerbation of AILI caused by hepatocyte NEDD4-1 deficiency. Mechanistically, NEDD4-1 was found to interact with the PPTY motif of VDAC1 through its WW domain and regulate K48-linked ubiquitination and degradation of VDAC1. Our present study indicates that NEDD4-1 is a suppressor of AILI and functions by regulating the degradation of VDAC1.