A novel technology is proposed for non-contact and real-time detection of atrial fibrillation using millimeter-wave radar.A 60 GHz PCR millimeter wave radar is used to continuously detect the chest echo signal of the subject.After signal acquisition,I-Q signal is generated through I-Q demodulation,and the signal phase information is extracted using effective points phase trend evaluation for obtaining the signals from oscillations in the chest wall,from which the respiratory signals and cardiac signals are extracted through digital filtering for the analysis of cardiac movement.Whether the atrial fibrillation occurs or not is determined by the characteristics of atrial fibrillation wave in the time domain.The effective points phase trend evaluation for extracting more accurate signal phase information and the time-domain method for real-time atrial fibrillation detection are the innovations of the study.The experimental results show that the proposed method achieves a detection accuracy of 99.2%in clinic.

White-matter tracts play a pivotal role in transmitting sensory and motor information, facilitating interhemispheric communication and integrating different brain regions. Meanwhile, sensorimotor disturbance is a common symptom in patients with major depressive disorder (MDD). However, the role of aberrant sensorimotor white-matter system in MDD remains largely unknown. Herein, we investigated the topological structure alterations of white-matter morphological brain networks in 233 MDD patients versus 257 matched healthy controls (HCs) from the DIRECT consortium. White-matter networks were derived from magnetic resonance imaging (MRI) data by combining voxel-based morphometry (VBM) and three-dimensional discrete wavelet transform (3D-DWT) approaches. Support vector machine (SVM) analysis was performed to discriminate MDD patients from HCs. The results indicated that the network topological changes in node degree, node efficiency, and node betweenness were mainly located in the sensorimotor superficial white-matter system in MDD. Using network nodal topological properties as classification features, the SVM model could effectively distinguish MDD patients from HCs. These findings provide new evidence to highlight the importance of the sensorimotor system in brain mechanisms underlying MDD from a new perspective of white-matter morphological network.
Humans ; Depressive Disorder, Major/pathology* ; White Matter/pathology* ; Male ; Female ; Support Vector Machine ; Adult ; Magnetic Resonance Imaging ; Middle Aged ; Case-Control Studies ; Sensorimotor Cortex ; Brain

Objective To establish the norm of Sub-Health Measurement Scale for nurses in Shandong Province,so as to provide a basis for understanding the current situation of sub-health and provide a reference for promoting the health of nurses.Methods From December 2020 to February 2023,14,308 nurses from 23 public tertiary hospitals enrolled in the Nurse Health Cohort Study in Shandong Province were selected as participants by convenience sampling.The sub-health status was assessed by the Sub-Health Measurement Scale,and the sub-health norm of nurses was constructed by establishing the mean,percentile and demarcation norm.Results A total of 10669 nurses were included in the analysis.The total score of Sub-Health Measurement Scale of nurses in Shandong Province was(61.13±12.40),and the scores of physiological sub-health sub-scale,psychological sub-health sub-scale and social sub-health sub-scale were(58.35±11.86),(62.56±15.85)and(63.56±16.73),respectively.The mean norm of sub-health assessment scale was established by gender and age.Based on the results of univariate analysis,we selected the characteristics with differences,namely gender,age,marital status,working department,years of working,professional title and employment type to establish a classification norm.P5,P25,P50,P75 and P95 were select to establish percentile norm.Taking(x-s),(x-0.5s),(x+0.5s),(x+s)as the cut-off points,the demarcation norm of the Sub-Health Measurement Scale and sub-scales was established,which was divided into 5 categories,including disease,severe sub-health,moderate sub-health,mild sub-health and healthy states.Conclusion This study established the Sub-Health Measurement Scale norm of nurses,which provided a basis for effectively evaluating and identifying the sub-health status of nurses.

Objective:To explore the diagnostic application and characteristics of contrast-enhanced ultrasound in exertional rhabdomyolysis (ERM).Methods:Three cases of ERM patients admitted to Department of Neurology, the First Medical Center of Chinese People′s Liberation Army General Hospital in August 2019 were selected and clinical data of the patients were collected including medical history, serum muscle enzyme, electromyography, magnetic resonance imaging (MRI) and dynamic contrast-enhanced ultrasound of the thigh muscles within one week after onset.Results:All three patients had muscle soreness and dark urine after exercise and their serum muscle enzyme level exceeded five times of normal value which could be definitely diagnosed as ERM. Skeletal muscle MRI showed equal or slightly longer T 1, longer fat-suppressed T 2 weighted fluid attenuated inversion recovery images, and high diffusion weighted imaging signal. In this group, one case of femur muscle MRI showed adductor longus and semitendinosus myopathy, other two cases showed quadriceps. All cases′ MRI score was grade one. Echogenic enhancement can be seen in normal ultrasound of diseased skeletal muscle. Contrast-enhanced ultrasound showed a dynamic strengthening process in which the central area was firstly strengthened, then strengthened in peripheral area. Dynamic contrast-enhanced ultrasound showed characteristic changes in ERM with early and obvious enhancement in the central area and uneven enhancement in the central area. Conclusions:Dynamic contrast-enhanced ultrasonography of ERM lesions has its characteristic changes. The enhancement of the central area of the lesion appeared early and obvious while the surrounding area appeared late and weak, showing the characteristic of "water ripple" concentric circle reinforcement. This enhancement characteristic suggested that ERM skeletal muscle was unevenly damaged and the central area was more obvious.

BACKGROUND: Bronchopulmonary carcinoid (BPC) is a rare neuroendocrine tumor, the clinical studies on treatment and prognostic factors of BPC are somewhat controversial. Our purpose was to evaluate the clinical efficacy of surgery on BPC, and to analyze the prognostic factors affecting the survival of BPC. METHODS: We retrospectively collected the clinical data of patients with BPC admitted to the Chinese PLA General Hospital between January 2000 and December 2017. The Kaplan-Meier method was used to calculate the survival rate of patients and to map the survival curve. Then the effects of different factors like pathological classification, gender, age, on prognosis were compared by univariate analysis and multivariate analysis was made by Cox proportional hazard model. RESULTS: A total of 98 patients had a diagnosis of BPC were included in the study. There were 41 patients with typical carcinoid (TC) and 57 patients with atypical carcinoid (AC). The 1-yr, 5-yr, and 10-yr overall survival rates of BPC were 96.9%, 80.0% and 73.6%, respectively. Univariate analysis showed age (P=0.000,1), smoking history (P=0.005), pathological subtype (P<0.000,1), T stage (P=0.000,2), TNM stage (P<0.000,1) were the prognostic factors. Multivariate analysis showed that age (P=0.005) and tumor stage (P=0.017) were independent prognostic factors. CONCLUSIONS BPC occurred more in middle-aged men. Surgery is the main treatment for lung cancer, and the overall prognosis is good. Age and TNM stage were independent risk factors for long-term survival after lung cancer surgery.

Objective To assess the performance of PET-CT in pulmonary carcinoid and to evaluate the efficacy of lymph node metastasis.Methods We retrospectively collected the data of 33 patients with primary pulmonary carcinoid in our center between November 2008 and March 2017.The results of PET-CT were analysed and the relationship among pathological sub-type, tumor size and SUVmax was compared.Results Thirty-three patients had a diagnosis of carcinoid tumor, typical in 10 patients and atypical in 23 patients.The major axis of the tumor was positively correlated with the SUVmax value (P<0.001), and the mean SUVmax of the atypical carcinoid was higher than that of the typical carcinoid(11.27 vs 3.54).The major axis of the tumor was controlled.One-way covariance analysis suggested that the pathological subtype was related to SUVmax(P=0.012).Overall, PET-CT had a sensitivity of 66.7％(95％CI: 12.5％-98.2％) and specificity of 90.9％(95％CI:83. 0％-95.5％).Conclusion Atypical carcinoids showed higher SUVmax than typical carcinoids, but the PET-CT perform-ance of lung carcinoids is not specific.There was a high specificity in evaluating lymph node metastasis.

Objective To investigate the value of imaging-pathology fusion guided targeted cryoablation for localized prostate cancer.Methods Between June 2014 and February 2017,64 patients undergoing targeted cryoablation for localized prostate cancer were retrospectively collected and analyzed.The average age was 77.8 years old,ranging 45-87 years old.The preoperative valne of PSA ranged from 5.1 to 19.8ng/ml,with mean of 15.3 ng/ml,including 6 case of cT1c,35 cases of cT2a,and 23 cases of cT2b,and 35 cases of Gleason score 6,8 cases of 3 + 4 and 21 cases of 4 + 3.All patients had good continence and 11 cases had good erectile function before operation.All the patients received MRI or contrast-enhanced ultrasonography examinations before biopsies,and the sites and range of cryoablation were determined by MRI or contrast-enhanced ultrasonography and biopsy pathological results.Results All the patients underwent the surgery successfully.The average postoperative hospital stay was 1.6 days,ranging 1 to 3 days,including 22 cases discharged within 24 h after surgery.The operative duration ranged from 85 to 152 min,with mean of 99.6 min.The satisfaction rate of the patients was 100％.Seven patients had Clavien Ⅰ or Ⅱ postoperative complications,and recovered after symptomatic treatment.The follow-up duration ranged from 0.5 to 32.2 months,with median of 11.8 months.All patients were alive without new metastasis.Eight patients developed biochemical recurrence,5 of those underwent intermittent endocrine therapy,resulting in stable PSA levels.Conclusion Imaging-pathology fusion guided targeted cryoablation was safe and effective for localized prostate cancer with the advantages of few complications,high satisfaction rate and quick recovery.

Lung cancer is becoming an increasing threat to Chinese residents and its incidence continues to rise while the treatment effect is far from satisfactory.Hence,it is essential to improve the level of early diagnosis,treatment,prognosis in lung cancer.An epigenetic trait is a stably heritable phenotype resulting from changes in a chromosome without alterations in the DNA sequence.The epigenetic studies,such as DNA methylation and histone methylation,are progressing rapidly in oncology research.A comprehensive understanding of its development status and existing problems is of great significance for the future research and the implementation of precision medicine.Herein,we aim to outline the progress ofDNA methylation and histone methylation modification in lung cancer and make a prospect for the future research.

In order to increase the expression level of target gene and to simplify the purifying process of separation and purification, we performed the transgenetic research of antigen VP7 gene into peanut via Agrobacterium tumefaciens. The plant binary expression vector is pBOG3VP7 harboring fusion gene oleosin-vp7, which is promoted by ole-promoter. Cotyledon nodes were used as transformation recipients. Transformed individuals were obtained through selection on medium containing 125 mg L-1 Kan. Integration of transgenes was assessed by PCR amplification and PCR-Southern blot hybridization. Taking pBOG3VP7 plasmid as positive control, non-transformed peanut as negative control. 6 plants among 11 plants grown up through seletion medium were detected by PCR and the rate of positive plants is 54.5%. PCR positive plants were further analysed by PCR-Southern blot hybridization. The results showed that 3 plants have DNA bloting bands. The results also showed that the foreign gene was integrated into genome of transformed peanuts. Elevated expression of rotavirus VP7 antigen in transgenic peanuts was a critical factor in the development of efficient and cheap plant oral vaccine.
Agrobacterium tumefaciens ; genetics ; Antigens, Viral ; biosynthesis ; genetics ; Arachis ; genetics ; metabolism ; Capsid Proteins ; biosynthesis ; genetics ; Plants, Genetically Modified ; genetics ; metabolism ; Rotavirus ; genetics ; immunology ; Transformation, Genetic ; Vaccines, Synthetic

Objective To assess the efficiency of total laminectomy and transpedicular screw placement techniques and a thoroughly decompression with a three column fixation device on the early cervical spine cord injury.Methods 27 patients were operated successfully with total cervical laminectomy through transpedicular screw techniques.Precise measurements of all cervical spines were made by postoperative CT scan of pedicle dimensions,angulation,and offset relative to the lateral mass boundaries.And meanwhile,cortical integrity and neurovascular injury were then assessed by obtaining postoperative computed tomography scans of each patient.Results Using manual techniques,220 pedicles were instrumented and all the cases were followed up between three to twenty-four months.The postoperative gradations were obviously better than the preoperative evaluation.Regardless of the technique used,the vertebral artery was the structure most likely to be injured.Conclusion Insufficient correlation between different surgeons' assessments of surface landmarks attests to the inadequacy of screw insertion techniques in the cervical spine based on such specific topographic.At the early stage of cervical spinal cord injury,using total laminonectomy decompression through cervical screws techniques to reconstruct spinal alignment could improve the prognosis of patients.