Tumor deposits(TD)is one of the independent risk factors for poor prognosis of colorectal cancer.The diagnosis of TD primarily relied on postoperative pathology,and precise preoperative assessment was difficult to achieve.With the development of medical imaging,many imaging techniques and analyzing methods had been applied to explore TD in colorectal cancer.The progresses in imaging research of TD in colorectal cancer were reviewed in this article.

Tumor deposits(TD)is one of the independent risk factors for poor prognosis of colorectal cancer.The diagnosis of TD primarily relied on postoperative pathology,and precise preoperative assessment was difficult to achieve.With the development of medical imaging,many imaging techniques and analyzing methods had been applied to explore TD in colorectal cancer.The progresses in imaging research of TD in colorectal cancer were reviewed in this article.

Background and purpose:Tumor-associated macrophages(TAM)as the main stromal cells in the tumor microenvironment play an important role in tumor progression.This study aimed to explore the clinical significance of M1 type TAM infiltration in hepatocellular carcinoma(HCC).Methods:We collected tissue paraffin samples from 320 HCC patients who underwent surgery at the Affiliated Nantong Hospital Three of Nantong University from January 2012 to December 2020.Immunohistochemical methods were used to detect the distribution of CD86 labeled M1 type TAM in HCC tissues,and positive cell density was calculated.Groups were established according to cell density,high-density group had cells with greater than average density(29 cells/mm2),and low-density group had cells with less than or equal to average density.The correlation and prognostic significance of M1 TAM density with clinicopathologic features and tumor infiltrating CD8+T lymphocytes of HCC were analyzed.Using immunohistochemistry to detect the expression of programmed death ligand-1(PD-L1),the cases were divided into four groups based on the cell density of CD86 and PD-L1.In the CD86+high-density group,PD-L1 high-density(CD86highPD-L1high)and PD-L1 low-density(CD86highPD-L1low)groups were included.In the CD86+low-density group,the PD-L1 high-density(CD86lowPD-L1high)and PD-L1 low-density(CD86lowPD-L1low)groups were included.We analyzed the prognostic significance of CD86+M1 type TAM density combined with PD-L1 expression.This study was approved by the Ethics Committee of Affiliated Nantong Hospital Three of Nantong University(ethics number:EK2022005).Results:CD86+M1 type TAM was mainly distributed in the tumor stroma.Its high-density rate was 44.7%(143/320).The density of CD86+M1 type TAM was positively correlated with tumor infiltrating CD8+T lymphocyte density(P＜0.001)and negatively correlated with hepatitis B virus surface antigen(HBsAg)positivity(P=0.003),and had no significant correlation with clinical and pathological features such as patient age,gender,cirrhosis,tumor size,histological grading and microvascular invasion.The CD86+M1 type TAM high-density group had better overall survival(OS)and disease-free survival(DFS)than the low-density group,and the differences were statistically significant(all P＜0.001).Multivariate Cox proportional hazards regression model analysis showed that low-density CD86+M1 type TAM was an independent risk factor for evaluating OS and DFS(OS:HR=1.468,P=0.022;DFS:HR=2.233,P＜0.001).The CD86highPD-L1high group had poor OS and DFS than the CD86highPD-L1low group,and the differences were statistically significant(both P＜0.05).The CD86lowPD-L1high group had poor OS and DFS than the CD86lowPD-L1low group.The difference in OS between the two groups was statistically significant(P＜0.05),while the difference in DFS was not statistically significant.Conclusion:The presence of high-density CD86+M1 type TAM in HCC tissue suggests a good prognosis and is an independent prognostic factor.Expression of PD-L1 in HCC tissue suggests increased invasiveness and poorer prognosis.

Lower extremity movement is a complex and large range of limb movement. Arterial stents implanted in lower extremity are prone to complex mechanical deformation, so the stent is required to have high comprehensive mechanical properties. In order to evaluate the mechanical property of different stents, in this paper, finite element method was used to simulate and compare the mechanical properties of six nitinol stents (Absolute Pro, Complete SE, Lifestent, Protégé EverFlex, Pulsar-35 and New) under different deformation modes, such as radial compression, axial compression/tension, bending and torsion, and the radial support performance of the stents was verified by experiments. The results showed that the comprehensive performance of New stent was better than other stents. Among which the radial support performance was higher than Absolute Pro and Pulsar-35 stent, the axial support performance was better than Complete SE, Lifestent and Protégé EverFlex stent, the flexibility was superior to Protégé Everflex stent, and the torsion performance was better than Complete SE, Lifestent and Protégé Everflex stent. The TTR2 type radial support force tester was used to test the radial support performance of 6 types, and the finite element analysis results were verified. The mechanical properties of the stent are closely related to the structural size. The result provides a reference for choosing a suitable stent according to the needs of the diseased location in clinical applications.
Alloys ; Femoral Artery ; Finite Element Analysis ; Lower Extremity ; Mechanical Phenomena ; Prosthesis Design ; Stents ; Stress, Mechanical

OBJECTIVE：To provide reference for improving medical insurance reimbursement for multi-indication drugs based on value-based pricing in China. METHODS：The theory and practice of value-based pricing for multi-indication drugs were sorted out，and the value standards and medical insurance reimbursement strategies based on value-based pricing in France，Germany，UK，Italy and Sweden were analyzed，so as to provide the suggestions for medical insurance reimbursement of multi-indication drugs in China. RESULTS & CONCLUSIONS：The realization of value-based pricing first needed to develop a value framework to define，measure and integrate value，and then established a model to convert the total value into price. The overall idea of value-based pricing for multi-indication drugs was consistent，but there were differences in the value standard. In the UK and Sweden， quality-adjusted life years （QALYs） and incremental cost-effectiveness ratios （ICERs） measured by pharmacoeconomicsare used as the value standard. France，Germany and Italy were more focused on the therapeutic value and clinical benefit improvement. As for medical insurance reimbursement strategies，France adopted single weighting method based on expected volume. Germany adopted combination weighting method based on value and volume. UK introduced the Patient Access Schemes and Italy introduced the Managed Entry reements，both based on the nominal reimbursement standard. Sweden adopted independent reimbursement for different indications by different brand names. It is suggested that China can explore the value-based pricing strategies of multi-indication drugs on the basis of the above international experiences，reference and use these variety of medical insurance reimbursement strategies comprehensively. Simultaneously，the information collection mechanism of patients and drug use should be improved to provide data support for the implementation of China’s value-based pricing and reimbursement strategies for multi-indication drugs.

Objective:To evaluate the effect of the comprehensive reforms of clinic-pharmacy separation and medical-consumables expenditure linkage in Beijing.Methods:Monitoring data of the comprehensive reforms were collected from 363 public medical institutions in Beijing between January 2016 and December 2019, while descriptive analysis and interrupted times series analysis using segmented regression models were adopted to analyze the influence of the two reforms on medical expense and its structure. We also studied the impact mechanism of service utilization and service price factors on medical expense control.Results:During the period from 2016 to 2019, the medical expenditure of public medical institutions in Beijing increased steadily at an annual growth rate of 4.4%-7.2%. The proportion of drug expense decreased from 44.6% in 2016 to 34.6% in 2019, while the proportion of medical service expense rose from 15.6% in 2016 to 24.3% in 2019, the proportion of examination and laboratory test expenses respectively showed a significant decline in April 2017 and June 2019. These two months witnessed respectively the launch of the two comprehensive reforms. Service utilization played an important role in controlling outpatient and emergency expenses, and service price was the key factor for controlling inpatient expenditure.Conclusions:The implementation of the two reforms in Beijing has effectively curbed the unreasonable growth of medical expenditure, and the expense structure has been constantly optimized and labor value of medical staff gradually improved.

Aiming at the lack of quantitative evaluation methods in clinical diagnosis of lung cancer, a classification and prediction model of lung cancer based on Support Vector Machine (SVM) was constructed by using radiomics method. Firstly, the definition and processing flow of radiomics were introduced. The experimental samples were selected from 816 lung cancer patients on LIDC. Firstly, ROI was extracted by central pooling convolution neural network segmentation method. Then, Pyradiomics and FSelector feature selection models were used to extract features and reduce dimension. Finally, SVM was used to construct the classification and prediction model of lung tumors. The predictive accuracy of the model is 80.4% for the classification of benign and malignant pulmonary nodules larger than 5 mm, and the value of the area under the curve (AUC) is 0.792. This indicates that the SVM classifier model can accurately distinguish benign and malignant pulmonary nodules larger than 5 mm.
Algorithms ; Humans ; Lung Neoplasms/diagnostic imaging* ; Neural Networks, Computer ; Radiometry ; Support Vector Machine ; Tomography, X-Ray Computed

Objective: To find out the present pediatrician allocation and the burden of diagnosis and treatment in Beijing, so as to provide evidence for effective allocation of pediatricians. Methods: Data and indicators were selected from Beijing Health Comprehensive Statistical Information Platform, including Manpower Basic Information Survey of Beijing Health Institutions, Annual Report of Medical Institutions, Beijing Statistical Data on Health Work(Compendium), as well as Beijing Health and Family Planning Statistical Yearbook. The study dynamically analyzed the number of pediatricians, that of pediatricians per 1 000 children, that of outpatients and emergency patients per pediatrician and the number of discharges per pediatrician from 2013 to 2017. Descriptive analysis was carried out on the data. Results: In 2017, the proportion of pediatricians accounted for 2.78% of the total number of doctors in the city, the number of pediatric emergencies accounted for 6.47% of the total outpatients and emergencies in the city, and the number of hospitalizations accounted for 5.70% of the total discharge in the city.From 2013 to 2017, the number of outpatients and emergency patients per pediatrician increased by 40.58%, and the number of discharged patients increased by 36.70%. The proportion of hospitalization at tertiary hospitals increased from 80.2% to 85.1%, and that in primary institutions decreased from 6.3% to 1.7%. Conclusions The study found such setbacks in the allocation of pediatric medical resources in Beijing, as insufficient pediatricians, unreasonable allocation and excessive burden on pediatricians. We should strengthen the planning and construction of pediatric human resources, improve the training mode of pediatricians, improve the salary level of pediatricians, and ease the burden on pediatricians, so as to provide high-quality medical services for children.

BACKGROUNDCollaterals to occluded infarct-related coronary arteries (IRA) have been observed after the onset of acute ST-elevation myocardial infarction (STEMI). We sought to investigate the impact of early coronary collateralization, as evidenced by angiography, on myocardial reperfusion and outcomes after primary percutaneous coronary intervention (PCI).

METHODSAcute procedural results, ST-segment resolution (STR), enzymatic infarct size, echocardiographic left ventricular function, and major adverse cardiac events (MACE) at 6-month follow-up were assessed in 389 patients with STEMI undergoing primary PCI for occluded IRA (TIMI flow grade 0 or 1) within 12 hours of symptom-onset. Angiographic coronary collateralization to the occluded IRA at first contrast injection was graded according to the Rentrop scoring system.

RESULTSLow (Rentrop score of 0 or 1) and high (Rentrop score of 2 or 3) coronary collateralization was detected in 329 and 60 patients, respectively. Patients with high collateralization more commonly had prior stable angina and right coronary artery occlusion, but less often had left anterior descending artery occlusion. At baseline, these patients presented with less extent of ST-segment elevation and lower serum levels of creatine kinase myocardial band (CK-MB) and cardiac troponin I (cTnI). Procedural success rate, STR, corrected TIMI flame count, and area under the curve of CK-MB and cTnI measurements after the procedure were similar between patients with high collateralization and those with low collateralization (for all comparisons P > 0.05). There were no differences in left ventricular ejection fraction and rates of MACE at 6 months according to baseline angiographic collaterals to occluded IRA.

CONCLUSIONSIn patients with acute STEMI undergoing primary PCI within 12 hours of symptom-onset, coronary collateralization to the occluded IRA was influenced by clinical and angiographic features. Early recruitment of collaterals limits infarct size at baseline, but has no significant impact on myocardial reperfusion after the procedure and subsequent left ventricular function and clinical outcomes.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Angioplasty, Balloon, Coronary ; Coronary Angiography ; Female ; Humans ; Male ; Middle Aged ; Myocardial Infarction ; diagnostic imaging ; therapy ; Treatment Outcome ; Young Adult