Objective:To study the effect of CBL on the teaching of knee magnetic resonance image (MRI) for orthopedic residents.Methods:From September 2015 to March 2018, CBL teaching method was applied in the teaching of knee MRI among 90 orthopedic residents of Arthritis Clinical & Research Center of Peking University People’s Hospital. The teaching effect of CBL was evaluated with questionnaire method. The scores of Knee MRI theoretical knowledge and image diagnosis were statistically compared after CBL teaching. SPSS 19.0 was performed for t test. Results:According to the questionnaire of 90 orthopedic residents, in the teaching of knee MRI, CBL teaching improved the residents' learning interest[77.8%(70/90)], fortified their theoretical knowledge[80.0%(72/90)], and enhanced their diagnosis ability of knee MRI[88.8%(80/90)], diagnosis ability of knee diseases[86.6%(78/90)], autonomous learning ability[84.5%(76/90)], expression ability[83.3%(75/90)], and the ability of creating active classroom atmosphere[51.1%(46/90)]. The performances of knee MRI theoretical knowledge and image analysis were significantly increased after CBL teaching, respectively from (65.35±10.36) points to (89.20±10.55) points and from (66.64±9.88) points to (89.50±10.06) points.Conclusion:CBL teaching can improve independent diagnostic ablity of knee MRI of orthopedic residents and lay a solid foundation of diagnosis and treatment for knee diseases, thus improving their clinical skills.

This study sought to clarify the molecular location and the interaction between mitoxantrone and mitoxantrone transforsomes. The anthraquinone of mitoxantrone, a heterocyclic ring that intercalates in the lipid of bilayer, was determined by UV-spectrophotometry and electron probes scan microscopy. Two aminoethylamino side-chains of the drugs fit to the phosphates of lecithin were determined by 8-value, thus the interaction with lecithin was substantiated. Differential scanning calorimetry confirmed that mitoxantrone has remarkable stabilizing effect on the mitoxantrone transforsomes membrane. The mitoxantrone binds tightly to lecithin. So a high degree of encapsulation efficiency and the sustained-release character of mitoxantrone transforsomes are verified.
Anthraquinones ; chemistry ; Calorimetry, Differential Scanning ; Delayed-Action Preparations ; chemistry ; Lecithins ; chemistry ; Mitoxantrone ; chemistry ; Spectrophotometry

The present study shows the case of a patient with acetabular protrusions secondary to rheumatoid arthritis progressing to femoral neck fracture.The patient,a 64 years female,had a history of rheumatoid arthtitis for 38 years.The left hip pain and abnormal sound occurred when hip flexion for picking up.She was diagnosed with rheumatoid arthritis secordary to acetabular pelvic retraction and left femoral neck fracture by medical history,physical examination and imaging.Total hip arthroplasty was performed after preoperative examination.Hip dislocation,femoral head removal,acetabular reconstruction;cup fixation,and bone mass assessment are technical challenges during surgery.Based on literature review,this case is belonging to secondary acetabular pelvic retraction,which may be related to acetabular softening caused by rheumatoid arthritis.Whenthe stress from the femoral head exceeds the endurance of the softened acetabulum,the acetabulum protrudes into the pelvis and gradually wraps around the femoral head.Based on the pathological characteristics,itis speculated that the cause of femoral neck fracture is the direct hit of the femoral neck-acetabular rim during hip flexion.In this case,spiral cup prosthesis was used to achieve both the initial stability of the prosthesis and saving bone mass around the acetabulum.The patient was followed up for 3 months with satisfactory position of prosthesis and joint function.

Objective:To construct a drug knowledge base based on drug instructions.Methods:Six hundred randomly selected drug instructions were labeled manually and divided into training set and test set. The training was based on bidirectional long short-term memory(Bi-LSTM) and conditional random fields(CRF) model to complete the recognition of medical entities. The extracted entities were standardized by the hybrid model of " similarity calculation and rule mapping table" , and then the drug information was imported into the Access database.Results:In the task of named entity recognition based on Bi-LSTM and CRF model, except for the crowd entities, the other entities had achieved good results with an F-value higher than 85%. Based on the hybrid model of " similarity calculation and rule mapping table" , the accuracy of entity standardization was 88.23%.Conclusions:The effect of the machine learning model in this study is similar to that of other named entity recognition and entity standardization studies, which can complete the task of drug knowledge base construction satisfactorily.

Objective To investigate the prognostic value of echocardiography indicators combined with se-rum recombinant human arginase 1(ARG1)and glucose-6-phosphate dehydrogenase(G6PD)in children with sepsis.Methods A total of 116 children with sepsis admitted to the hospital from May 2022 to June 2023 were enrolled in the study as the sepsis group.According to the severity of sepsis,the children were further divided into general sepsis group(52 cases),severe sepsis group(38 cases)and septic shock group(26 cases).Ac-cording to the prognosis of the children,the children with sepsis were divided into good prognosis group(84 cases)and poor prognosis group(32 cases).A total of 116 healthy children who underwent physical examina-tion in the hospital during the same period were enrolled as the control group.The left ventricular ejection fraction(LVEF),left ventricular end-diastolic diameter(LVEDD),left ventricular end-diastolic volume(LV-EDV)and early diastolic mitral flow peak velocity(E)were detected by using color Doppler ultrasound.Ser-um ARG1 and G6PD levels were detected by using enzyme-linked immunosorbent assay(ELISA).The echo-cardiographic indexes and serum ARG1 and G6PD levels were compared between the sepsis group and the con-trol group,and among sepsis children with different disease severity and different prognosis.The receiver op-erating characteristic(ROC)curve was used to analyze the predictive value of echocardiographic indexes com-bined with serum ARG1 and G6PD for poor prognosis in children with sepsis.Results Compared with the control group,the sepsis group had significant reductions in LVEF,E,and G6PD(P＜0.05)and significant increases in LVEDD,LVEDV,and ARG1(P＜0.05).With the aggravation of sepsis,the levels of LVEF,E,and G6PD in children with sepsis gradually decreased(P＜0.05),while the levels of LVEDD,LVEDV,and ARG1 gradually increased(P＜0.05).Compared with the good prognosis group,the poor prognosis group had significantly lower levels of LVEF,E,and G6PD(P＜0.05)and significantly higher levels of LVEDD,LV-EDV,and ARG1(P＜0.05).ROC curve analysis showed that the AUC of echocardiographic indexes com-bined with serum ARG1 and G6PD in predicting poor prognosis of children with sepsis was 0.971,and the sensitivity and specificity were 84.4％and 83.2％,respectively.Conclusion The levels of LVEF,E,and G6PD in children with sepsis significantly decreases,and the levels of LVEDD,LVEDV,and ARG1 signifi-cantly increases.Echocardiographic parameters combined with serum ARG1 and G6PD have high predictive value for poor prognosis in children with sepsis.

Objective:To investigate the influencing factors, periprocedural complications, and long-term outcomes of successful recanalization after endovascular treatment in patients with non-acute symptomatic internal carotid artery occlusion.Methods:Patients with non-acute internal carotid artery occlusion received endovascular treatment in the Nanjing Stroke Registration System between January 2010 and December 2021 were retrospectively enrolled. Clinical endpoint events were defined as successful vascular recanalization, periprocedural complications (symptomatic embolism and symptomatic intracranial hemorrhage), neurological function improvement, and recurrence of ipsilateral ischemic events. Multivariate logistic regression analysis was used to investigate the independent influencing factors of successful vascular recanalization. Cox proportional hazards regression analysis was used to investigate the correlation between endovascular treatment outcomes and neurological function improvement, as well as ipsilateral ischemic cerebrovascular events. Results:A total of 296 patients were included, of which 190 (64.2%) were successfully recanalized. Multivariate logistic regression analysis showed that symptoms manifest as ischemic stroke (odds ratio [ OR] 3.353, 95% confidence interval [ CI] 1.399-8.038; P=0.007), the time from the most recent symptom onset to endovascular therapy within 1 to 30 d ( OR 2.327, 95% CI 1.271-4.261; P=0.006), proximal conical residual cavity ( OR 2.853, 95% CI 1.242-6.552; P=0.013) and focal occlusion (C1-C2: OR 3.255, 95% CI 1.296-8.027, P=0.012; C6/C7: OR 5.079, 95% CI 1.334-19.334; P=0.017) were the independent influencing factors for successful vascular recanalization. Successful recanalization did not increase the risk of symptomatic intracranial hemorrhage within 7 d after procedure (3.2% vs. 0.9%; P=0.428). The median follow-up time after procedure was 38 months. Cox proportional hazards regression analysis showed that after adjusting for confounding factors, successful recanalization was significantly associated with postprocedural neurological improvement (hazard ratio 1.608, 95% CI 1.091-2.371; P=0.017), and significantly reduced the risk of recurrence of long-term ischemic events (hazard ratio 0.351, 95% CI 0.162-0.773; P=0.010). Conclusion:In patients with non-acute internal carotid artery occlusion, successful endovascular recanalization can effectively reduce the risk of long-term ischemic events without increasing the risk of symptomatic intracranial hemorrhage.

Objective:To investigate predictive factors for successful endovascular recanalization in patients with non-acute symptomatic internal carotid artery occlusion (SICAO), to develop a decision tree model using the Classification and Regression Tree (CART) algorithm, and to evaluate the predictive performance of the model.Methods:Patients with non-acute SICAO received endovascular therapy at 8 comprehensive stroke centers in China were included retrospectively. They were randomly assigned to a training set and a validation set. In the training set, the least absolute shrinkage and selection operator (LASSO) algorithm was used to screen important variables, and a decision tree prediction model was constructed based on CART algorithm. The model was evaluated using the receiver operating characteristic (ROC) curve, Hosmer-Lemeshow goodness-of-fit test and confusion matrix in the validation set.Results:A total of 511 patients with non-acute SICAO were included. They were randomly divided into a training set ( n=357) and a validation set ( n=154) in a 7:3 ratio. The successful recanalization rates after endovascular therapy were 58.8% and 58.4%, respectively. There was no statistically significant difference ( χ2=0.007, P=0.936). A CART decision tree model consisting of 5 variables, 5 layers and 9 classification rules was constructed using the six non-zero-coefficient variables selected by LASSO regression. The predictive factors for successful recanalization included fewer occluded segments, proximal tapered stump, ASITN/SIR collateral grading of 1-2, ischemic stroke, and a recent event to endovascular therapy time of 1-30 d. ROC analysis showed that the area under curve of the decision tree model in the training set was 0.810 (95% confidence interval 0.764-0.857), and the optimal cut-off value for predicting successful recanalization was 0.71. The area under curve in the validation set was 0.763 (95% confidence interval 0.687-0.839). The accuracy was 70.1%, precision was 81.4%, sensitivity was 63.3%, and specificity was 79.7%. The Hosmer-Lemeshow test in both groups showed P>0.05. Conclusion:Based on the type of ischemic event, the time from the latest event to endovascular therapy, proximal stump morphology, the number of occluded segments, and the ASITN/SIR collateral grading constructed the decision tree model can effectively predict successful recanalization after non-acute SICAO endovascular therapy.

Objective:To identify the morphological features and clinical significance of intra-vascular thrombus in carotid stenosis using optical coherence tomography (OCT).Methods:Twelve patients with carotid artery thrombosis detected by OCT assessment in Jinling Hospital between January 2017 and January 2020 were included. Serial area measurements within the athero-thrombotic target lesion were performed to evaluate the OCT-thrombus score, length, area and volume. The clinical data and plaque morphological features were also assessed.Results:Among the 12 patients demonstrating thrombus on OCT, eight patients presented with white thrombus, two patients presented with red thrombus, and another two patients displayed both white thrombus and red thrombus. OCT-thrombus scores were 1-32. The OCT-thrombus score was correlated to the OCT-thrombus volume ( ρ=0.739, P=0.006) and the thrombus length ( ρ=0.932, P<0.001). All lesions were presented with fibrous cap disruption, and 10 lesions were presented with thin-cap fibroatheroma. In view of the OCT findings, all patients received carotid balloon angioplasty and stent implantation. During an average follow-up of 14.2 months, none of the 12 patients had fatal stroke or recurrent ischemic stroke. Conclusions:OCT can be used to assess intra-carotid thrombus and its more detailed morphological characteristics, offering more possibilities in quantitative analysis of thrombus burden.

Osteoporotic proximal humeral fracture (OPHF) is one of the common osteoporotic fractures in the aged, with an incidence only lower than vertebral compression fracture, hip fracture, and distal radius fracture. OPHF, secondary to osteoporosis and characterized by poor bone quality, comminuted fracture pattern, slow healing, and severely impaired shoulder joint function, poses a big challenge to the current clinical diagnosis and treatment. In the field of diagnosis, treatment, and rehabilitation of OPHF, traditional Chinese and Western medicine have accumulated rich experience and evidence from evidence-based medicine and achieved favorable outcomes. However, there is still a lack of guidance from a relevant consensus as to how to integrate the advantages of the two medical systems and achieve the integrated diagnosis and treatment. To promote the diagnosis and treatment of OPHF with integrated traditional Chinese and Western medicine, relevant experts from Orthopedic Expert Committee of Geriatric Branch of Chinese Association of Gerontology and Geriatrics, Youth Osteoporosis Group of Orthopedic Branch of Chinese Medical Association, Osteoporosis Group of Orthopedic Surgeon Branch of Chinese Medical Doctor Association, and Osteoporosis Committee of Shanghai Association of Integrated Traditional Chinese and Western Medicine have been organized to formulate Expert consensus on the diagnosis and treatment of osteoporotic proximal humeral fracture with integrated traditional Chinese and Western medicine ( version 2024) by searching related literatures and based on the evidences from evidence-based medicine. This consensus consists of 13 recommendations about the diagnosis, treatment and rehabilitation of OPHF with integrated traditional Chinese medicine and Western medicine, aimed at standardizing, systematizing, and personalizing the diagnosis and treatment of OPHF with integrated traditional Chinse and Western medicine to improve the patients ′ function.

TSCI have dyskinesia and sensory disturbance that can cause various life-threaten complications. The patients with traumatic spinal cord injury (TSCI), seriously affecting the quality of life of patients. Based on the epidemiology of TSCI and domestic and foreign literatures as well as expert investigations, this expert consensus reviews the definition, injury classification, rehabilitation assessment, rehabilitation strategies and rehabilitation measures of TSCI so as to provide early standardized rehabilitation treatment methods for TSCI.