Objective:To explore the value of clinical and biparametric magnetic resonance imaging(bpMRI)in diagnosing extraprostatic ex-tension(EPE)of prostate cancer(PCa).Methods:This retrospective study assigned 107 patients into EPE(n=42)and organ-limited(n=65)groups based on their postoperative pathology after radical prostatectomy from August 2018 to May 2024 at Wuhu Second People's Hospit-al.The differences in the following clinical risk indicators were compared between the groups:age,total prostate specific antigen(tPSA),pro-state volume,prostate specific antigen density(PSAD)and International Society of Urological Pathology(ISUP)score for prostate puncture.The differences in MRI indicators,prostate imaging reporting and data system(PI-RADS)score and bpMRI were also identified.Binary Logist-ic regression analysis was used to construct clinical and joint models for diagnosing EPE,and screening independent influencing factors.The ROC curve analyze the independent influencing factors and diagnostic performance of the models.The DeLong test was used to compare the differences between the AUC models.A nomogram was draw,and performance evaluated.Results:The differences in tPSA,PSAD,ISUP score for prostate puncture,PI-RADS score,and bpMRI were statistically significant between the two groups(P<0.05).The clinical model AUC was 0.821;while the AUCs of the combined model and independent influencing factors PSAD(OR=25.992),ISUP score for prostate puncture(OR=1.676),and bpMRI(OR=10.729)were 0.899,0.813,0.770,and 0.793 respectively(P<0.001).The combined model was superior to the clinical model(Z=2.502 and P=0.012).The average AUC for 5-fold cross-validation was 0.887,with high model calibration and a threshold range of 5%-85%,indicating clinical benefits.Conclusions:The combined model nomogram derived from clinical and bpMRI indicators is highiy valuable for diagnosing PCa EPE.

As a Chinese saying goes， "good Chinese medicinal material makes good medicine"， the quality of Chinese herbal medicines is related to the development prospect of Chinese medicine industry in China. With the rapid development of new technologies such as traceability methods and monitoring instruments， it is imperative to integrate and innovate traditional Chinese herbal medicines with new-generation information technology in view of the quality problems existing in the current production and circulation of Chinese herbal medicines， and it is of great significance for the construction of traceability system to ensure the quality and safety of Chinese herbal medicines and to promote the industry of Chinese herbal medicines to move towards high-quality development. This paper reviews the development history of the traceability system of Chinese herbal medicines in China， takes the influencing factors of the quality of Chinese herbal medicines as the entry point， and proposes that the construction of the traceability system should satisfy the traceability requirements of the characteristics of Chinese herbal medicines and their traditional medication experience. By analyzing the influencing factors of the quality of Chinese herbal medicines， it is pointed out that focusing on the influencing factors to build a traceability system is of great significance for targeting the problematic links at a later stage and exploring the interrelationship between environmental factors and the quality of Chinese herbal medicines. Based on the previous explorations， the author summarizes the system framework， functional modules and practical applications of the traceability system of Chinese herbal medicines， and looks forward to the development of a traceability system with risk early warning function and expert decision-making function in its functional development. Finally， based on the factors affecting the quality of Chinese herbal medicines， the author puts forward several thoughts on construction of the traceability system， and makes an in-depth analysis and puts forward a solution for the current situation that a unified， standardized and universal traceability system has not yet been built， with a view to providing ideas and references for the construction of traceability system of Chinese herbal medicines.

Objective:To explore the effects of workshops combined with problem-based learning (PBL) in clinical teaching of joint surgery.Methods:A total of 60 students who would participate in standardized residency training from September 2019 to June 2021 were randomly divided into traditional lecture-based learning (LBL) group, PBL group, and workshops combined with PBL group, with 20 students in each group. The effects were evaluated by theoretical knowledge and clinical skill assessment and anonymous teaching quality questionnaire surveys. SPSS 25.0 was used to perform the t test and chi-squared test. Results:The workshop+PBL group showed the highest theoretical knowledge score (86.40±9.76), clinical skill score (92.15±4.49), and total score (88.70±5.75), compared with the PBL group (78.45±10.40, 85.80±10.00, and 81.39±7.27, respectively) and the LBL group (80.10±6.77, 85.20±8.12, and 82.14±6.14, respectively). According to the teaching quality questionnaire surveys, the workshop+PBL group was significantly superior to the PBL and LBL groups in self-ability evaluation and the degree of satisfaction with teaching ( P<0.05). Conclusions:Workshops combined with PBL can effectively improve students' scores of theoretical knowledge and clinical skills, with better self-ability evaluation results and higher satisfaction with teaching, which is worthy of application and promotion in clinical teaching of joint surgery.

Femoral neck fracture (FNF) in the elderly patients is currently a major health challenge worldwide, with excessive consumption of medical resources, high incidence of complications as well as suboptimal outcome and prognosis. Hip joint arthroplasty (HJA) has been the mainstream treatment for FNF in the elderly, but the conventional surgical approaches and techniques are still confronted with a series of bottlenecks such as dislocation, limp and limb length discrepancy. In recent years, direct anterior approach (DAA) for HJA (DAA-HJA) has been a major new choice in the field of joint replacement, which achieves improved clinical effectiveness of HJA in the treatment of elderly FNF, due to the fact that DAA approach involves the neuromuscular interface and accords with the idea of soft tissue retention and enhanced recovery after surgery. However, there is still a lack of unified understanding of standard technique and procedure of DAA-HJA in the treatment of elderly FNF. Therefore, relevant experts from the Hip Joint Group of Chinese Orthopedics Association of Chinese Medical Association, Youth Arthrology Group of Orthopedic Committee of PLA, Orthopedic Committee of Chongqing Medical Association, Branch of Orthopedic Surgeons of Chongqing Medical Doctor Association and Sport Medicine Committee of Chongqing Medical Association were organized to formulate the " Chinese expert consensus on the technical standard of direct anterior hip arthroplasty for elderly femoral neck fracture ( version 2023)" based on evidence-based medicine. This consensus mainly proposed 13 recommendations covering indications, surgical plans, prosthesis selections, surgical techniques and processes, and postoperative management of DAA-HJA in elderly patients with FNF, aiming to promote standardized, systematic and patient-specific diagnosis and treatment to improve the functional prognosis of the patients.

Objective:To explore the effects of mechanical factors on the morphology of the growth plate and proximal femur development, in order to provide a mechanical basis for the mechanism of Cam lesions in femoral acetabular impingement (FAI).Methods:Using CT scan data of hip joint from adolescents, we constructed three-dimensional finite element models of normal and extended proximal femoral epiphyseal growth plates. Dynamic mechanics and position data from daily activities (walk, stand on one and two feet, go upstairs and downstairs, sit and stand up, squat and stand up) and basketball layup drills were collected from five healthy volunteers using the Vicon system. The mean values of femoral head mechanical loads and positions at peak values, movement onset, and termination were selected for finite element analysis to observe the distribution of equivalent stress, normal stress, and shear stress on the two growth plate models under different activity modes.Results:Successful construction of three-dimensional finite element models for normal and extended proximal femoral epiphyseal growth plates was achieved. Mechanical load values and spatial positions of the femoral head during daily activities and layup movements were obtained. In daily activities, peak equivalent stress values for normal and extended growth plates ranged from 1.6 to 11.0 MPa; compressive stress ranged from 1.7 to 12.0 MPa; tensile stress ranged from 0.5 to 10.0 MPa; and shear force ranged from 0.4 to 7.1 MPa. The compressive stress during walking, standing on one or both feet, going up and down stairs, sitting and standing, and squatting was concentrated in the central and lateral areas; tensile stress was concentrated in the central and medial areas; shear force was concentrated in the medial area and the anterior and posterior edges of the growth plate. During a layup, the compressive stress in the center, outer upper side, and medial edge of the growth plate of the normal model was notably concentrated, with peaks fluctuating between 5.5-19.0 MPa, 5.7-11.0 MPa, and 5.4-7.3 MPa respectively; tensile stress and shear force were concentrated at the inner and outer edges as well as in the central area, with peaks fluctuating between 3.0-24.0 MPa and 3.0-26.0 MPa respectively, these values were significantly different from those observed during daily activities. For the elongated growth plate, compressive stress was concentrated at the central and lateral edges with peaks fluctuating between 17.0-41.0 MPa and 17.0-38.0 MPa respectively; simulated shear stress and tensile stress showed significant concentration at peaks fluctuating between 4.9-34.0 MPa, also significantly different from those observed during daily activities.Conclusion:The difference in mechanical distribution between daily activities, basketball layup training, as well as between normal and extended growth plates may be the mechanical initiating factor in the development of extended growth plates and the formation of Cam lesions, it may be the mechanical initiating factor for the development of extended growth plates and the collision of Cam lesions in FAI.

[Objective]To explore the application and value of Confucius'"Daoyi"(Tao-skill)educational thought in Medical Ancient Texts course.[Methods]This paper uses the research method of philology,studies the ancient and modern related books of"Daoyi"thought combines the experience of teaching reform of Medical Ancient Texts course,puts forward a new classification of teaching objectives,applied in Medical Ancient Texts course,and summarizes the application value.[Results]"Daoyi"thought materializes into four-level teaching objectives:"Yi,Ren,De and Dao"(skill,kind,morality and Tao).In Medical Ancient Texts course,the Yi objective is to master the reading skills starting from Chinese characters;the Ren objective is to cultivate social personality of loving people;the De objective is to cultivate the inner personality of morality and self-cultivation;and the Dao objective is to establish the thinking of exploring medical path.Using traditional learning methods can help to improve the reading ability of ancient books and establish traditional Chinese medicine philosophical thinking.[Conclusion]"Daoyi"thought combines skills,ideology and high-level teaching objectives,establishes philosophical thinking of seeking Dao.So it is worth further application and research.

Objective:To evaluate the safety and efficacy of endoscopic retrograde cholangiopancreatography (ERCP) for diagnosis and treatment of pancreas divisum (PD) combined with chronic pancreatitis (CP) in children.Methods:Data of patients under 18 years old diagnosed as having PD with CP in Hangzhou First People′s Hospital from January 2010 to January 2020 were retrospectively analyzed. The general information, endoscopic procedures and follow-up of the children were recored. The number of acute pancreatitis attacks, visual analogue scale (VAS) scores of the abdominal pain, and the diameter of pancreatic duct before and after ERCP were compared.Results:A total of 19 children diagnosed as having PD with CP underwent 82 ERCP procedures with the mean number of 4.31 (1-9). The mean number of pancreatic stent replacement was 3.21 (0-8). The success rate of minor papilla cannulation was 97.6% (80/82) with the pain relief rate of 89.5% (17/19) after the first ERCP. ERCP-related complication rate was 4.9% (4/82)without transference to surgery. The mean follow-up time was 55.8 months (9-114 months). The median number of acute pancreatitis attacks decreased from 3.0 to 0 compared with that before the procedure ( Z=-3.839, P<0.001) and the median VAS score decreased from 6 to 1 ( Z=-3.748, P<0.001), both of which had significant difference. However, the median diameters of main pancreatic duct were both 0.35 cm before and after procedure with no significant difference ( Z=-0.699, P=0.484). Conclusion:ERCP is safe and effective to diagnose and treat pediatric patients with PD with CP.

Objective:To evaluate the safety and efficacy of endoscopic retrograde cholangiopancreatography (ERCP) for pancreas divisum(PD)with chronic pancreatitis (CP) in adults.Methods:Data of patients older than 18 years old diagnosed as having PD with CP in Hangzhou First People′s Hospital from January 2008 to January 2020 were retrospectively analyzed, i. e.the general information, ERCP procedures and follow-up data of the patients. The number of acute pancreatitis attacks, visual analogue scale (VAS) of abdominal pain, and the diameter of pancreatic duct before and after ERCP were compared.Results:A total of 61 patients diagnosed as having PD with CP underwent 301 ERCP procedures with the median number of 4(3.0-6.5). The median number of pancreatic stent replacement was 3 (2-6). The success rate of the first minor papilla cannulation was 90.2% (55/61), and the total success rate of minor papilla cannulation was 98.0% (295/301). The efficacy rate of the first ERCP was 82.0% (50/61). ERCP-related complication rate was 2.7% (8/301). The median follow-up time was 54 months (31.0-97.5 months). The median number of acute pancreatitis attacks decreased from 2.40 to 0 ( Z=-6.726, P<0.001) compared with that before ERCP. The median VAS decreased from 7 to 2 ( Z=-6.621, P<0.001). The median pancreatic duct diameter decreased from 5.0 mm to 4.0 mm ( Z=-2.330, P=0.020). However, the mean weight increased from 56.04±10.75 kg to 58.62±10.79 kg ( t=-5.285, P<0.001)one year after the procedure. Conclusion:ERCP is safe and effective in the diagnosis and treatment of PD with CP in adults.

Objective To investigate the relationship between low-density lipoprotein cholesterol/high-density lipoprotein cholesterol ratio (LHR) and asymptomatic carotid plaques and their stability in high-risk stroke population.Methods Between December 2012 and April 2015,a total of 39 944 permanent resident population ≥40 years were used as subjects of the survey from 11 rural communities in Haitou Town,Banzhuang Town and Tashan Town,Ganyu District,and 9 urban communities in Xinpu District and Haizhou District,Lianyungang City using epidemiological survey method of cluster sampling.Excluding those who took lipid-lowering drugs within 3 months and had a history of stroke or transient ischemic attack,6 592 people at high risk of stroke were finally screened out.Ultrasound was used to detect carotid plaques.The subjects were divided into plaque-free group and plaque group.The latter was further divided into stable plaque group and unstable plaque group.Multivariate logistic regression analysis was used to evaluate the independent risk factor for carotid plaques and their stability.The odds ratio (OR) and 95％ confidence interval (CI) were calculated.Receiver Operating Characteristic (ROC) curve was used to evaluate the prediction efficiency of LHR on carotid plaques.Results Multivariate logistic regression analysis showed that low-density lipoprotein cholesterol (LDL-C) was an independent risk factor for carotid plaques,while high-density lipoprotein cholesterol (HDL-C) was an independent protection factor of carotid plaques.Using the lowest quintile (Q1) of LHR as a reference,carotid plaque risk increased significantly with the increasing LHR (Q2:OR 1.448,95％ CI 1.082-1.937,P =0.013;Q3:OR 2.414,95％ CI 1.754-3.322,P＜0.001;Q4:OR 2.939,95％ CI 1.945-4.441,P＜0.001;Q5:OR 4.884,95％ CI 3.143-7.115,P＜0.001).ROC curve analysis showed that the area under the curve (AUC) of LHR predicting carotid plaques was 0.795 (95％ CI 0.792-0.807;P＜ 0.001),and the optimal cut-off value was 3.00 (sensitivity 68.37％,specificity 75.65％).LHR ≥3.92 (LHR in the Q4 and Q5 subgroups) was an independent risk factor for unstable carotid plaques (OR 2.915,95％ CI 2.104-4.040;P＜0.001).The AUC of the LHR predicting unstable carotid plaques was 0.658 (95％ CI 0.633-0.684;P＜0.001).Conclusions LHR was an independent predictor of carotid plaques in high-risk stroke patients.It had higher predictive value for carotid plaques,and its conversion threshold for promoting plaque formation was 3.00.When LHR was ≥3.92,there was a significant increase in the risk of unstable carotid plaques.

Objective: To design a new type of maintenance learning machine of ventilator for teaching and experiment combined with electronic technology course of higher vocational education. Methods: ACM804 ventilator was chosen as prototype machine and the electronic technology course of higher vocational education was chosen as theory basis. The designs of internal circuit and gas circuit of prototype machine were improved, besides, some test points and failure points were designed for teaching in classroom. Results: This machine not only could realize all functions of prototype machine, but also could carry forward test teaching and contribute students to maintain common failure in accordance with course content. Conclusion: Through the design of teaching experiment and using of learning machine, the new machine has achieved better teaching effect for students to grasp machine theory and operate actual circuit.