ObjectiveTo explore the cause of early death (death within 3-12 months after hemodialysis) and the related influencing factors patients undergoing maintenance hemodialysis (MHD) as to provide a scientific basis for the prevention of early death.Methods A retrospective matched controlled study was conducted. Fifty-one patients who underwent MHD from January 2004 to April 2014 and died within 3-12 months after hemodialysis in hemodialysis center of the 174th Chinese People's Liberation Army Hospital were included in the case group by retrospective analysis method. According to 1∶2 matched controls, 102 patients underwent hemodialysis in the same period (±2 months) and survived over 12 months were selected as control group. All patients received regular hemodialysis (dialysis 2-3 times per week), with conventional limitation of water and sodium intake, routine treatments such as control of blood pressure, treatment of anemia and disorders of calcium and phosphorus contents. Causes of short-term death were analyzed. Clinical and biochemical parameters of two groups were collected when dialysis was started, and the single factor and multiple factors logistic regression was used to analyze the related risk factors when dialysis was started. Receiver operating characteristic curve (ROC) was plotted to evaluate the value of above parameters in predicting the early death in patents with MHD.Results The main causes of early death of 51 patients with MHD were mainly cardiovascular and cerebrovascular diseases (27 cases, 52.9%), and infections (15 cases, 29.4%). It was shown by single factor analysis that the age [odds ratio (OR) = 6.625, 95% confidence interval (95%CI) = 3.232-13.580,P = 0.000], diabetes (OR = 3.875, 95%CI = 0.654 - 10.622,P = 0.031), specialist intervention time before dialysis (OR = 0.349, 95%CI =0.287 - 0.572,P = 0.004), the emergence of cardiovascular and cerebrovascular events before dialysis (OR = 9.667, 95%CI = 4.632 - 20.174,P = 0.000), the first dialysis for emergency dialysis (OR = 3.875, 95%CI = 1.713 - 8.765, P = 0.005), blood albumin level (OR = 0.294, 95%CI = 0.068 - 0.550,P = 0.008), leukocyte count (OR = 6.286, 95%CI = 1.648 - 23.982,P = 0.026), neutrophil count (OR = 2.833, 95%CI = 1.630 - 4.923,P = 0.001) might be the factors correlating with early death. Eight independent factors were statistically significant, and their effect on the MHD patients was analyzed by logistic regression analysis inα = 0.05 level. The results showed that patients with old age (OR = 1.054, 95%CI = 1.019-1.090,P = 0.002), and the emergence of cardio-cerebrovascular events (OR = 7.469, 95%CI = 2.474 - 22.545,P = 0.000)were early death risk factors of MHD patients, and early specialist intervention before dialysis was a protective factor (OR = 0.286, 95%CI = 0.113-0.722,P = 0.008). ROC curve showed that age had moderate diagnostic value for early death of MHD [area under ROC curve (AUC) = 0.756], the cut-off value was 59.0 years old, the sensitivity was 66.7%, and the specificity was 77.5%. The diagnostic value of early specialist intervention before dialysis was relatively low (AUC = 0.367), the cut-off value was 0.875 years, the sensitivity was 39.2%, and the specificity was 33.3%.Conclusion Old age, the emergency of cardiovascular and cerebrovascular events before dialysis is associated with early death, and specialist intervention ahead of dialysis can reduce the risk of early death.

Objective To investigate the clinical effects of subemergency treatment of femoral intertrochanteric fractures in elderly patients.Methods From June 2013 through February 2014,47 patients older than 65 years were treated for femoral intertrochanteric fracture at our department and completed full follow-ups.Of them,20 received subemergency operation.They were 9 men and 11 women,with an average age of 72.2 ± 4.8 years.By the Evans-Jensen classification,there were 2 cases of type Ⅰ,5 of type Ⅱ,5 of type Ⅲ,5 of type Ⅳ,and 3 of type Ⅴ.The time from injury to surgery ranged from 0.5 to 1.7 days (average,0.8 days).The other 27 patients underwent selective operation.They were 11 men and 16 women,with an average age of 74.9 ± 5.7 years.By the Evans-Jensen classification,there were 3 cases of type Ⅰ,6 of type Ⅱ,6 of type Ⅲ,7 of type Ⅳ,and 5 of type Ⅴ.The time from injury to surgery ranged from 2 to 5 days (average,3.4 days).We compared the 2 groups in terms of in-hospital complications,fracture healing time,length of hospital stay,and hip scores at the last follow-up.Results All the patients were followed up for 12 to 15 months (mean,13.4 months).The rate of in-hospital complications in the subemergency operation group (35.0％,7/20) was significantly lower than that in the selective operation group (51.9％,14/27),and the length of hospital stay in the former (12.1 ± 1.6 days) was significantly shorter than in the latter (16.1 ± 1.8 days) (P ＜ 0.05).There was no significant difference between the 2 groups in fracture healing time (13.1 ± 1.8 weeks versus 13.6 ± 1.2 weeks) (P ＞ 0.05).According to the hip scores at the last follow-up,the subemergency operation group had 16 excellent,2 good,one fair and one poor cases (with an excellent to good rate of 90.0％) while the selective operation group had 21 excellent,2 good,2 fair and 2 poor cases (with an excellent to good rate of 85.2％),showing no significant difference between groups (P ＞ 0.05).Conclusion Subemergency operation can reduce not only in-hospital complications but also length of hospital stay for old patients with femoral intertrochanteric fracture.

Objective To observe the therapeutic effects of arsenic trioxide combined with transcatheter arterial chemoembolization on treatment of primary liver cancer with pulmonary metastases.Methods Sixty patients were randomly divided into two groups:group A (treatment group,n =30) and group B (control group,n =30).Group A was received periodic transcatheter arterial chemoembolization (TACE) and 10 mg arsenic trioxide by intravenous infusion for 5 hours per day,3 days after TACE.Each cycle consisted of 14 days' administration,and repeated after 2 weeks.Each patient was received 3-4 successive cycles.Group B was received periodic TACE alone.Objective efficiency,benefit rate,quality of life and the correlates with metastatic tumor size and number in the both groups were recorded.Results The objective efficiency was 26.7％ (8/30),and the benefit rate was 60.0％ (18/30) in group A,while they were 0 and 16.7％ (5/30) in group B with significant statistics differences (x2 =7.067,P =0.008;x2 =11.915,P =0.001).The quality of life was improved in 4 patients and stable in 18 of group A,while no patient was improved and 13 were stable in group B (x2 =9.669,P =0.008).There was a significantly positive correlation between the tumor burden and therapeutic effect (Kendall r =-0.765,P ＜ 0.001 ;Spearman r =-0.821,P ＜ 0.001).Conclusion Arsenic trioxide combined TACE is an effective treatment method in treating primary liver cancer with pulmonary metastases.

OBJECTIVEThis preliminary study aims to investigate the effects of titanium and titanium alloy micro-nano-dimensional topography on the biological behavior of osteoblasts in vitro.

METHODSElectrolytic etching (EE) method was used to produce micro-nano dimensional titanium surfaces. The surfaces were observed to determine their effects on the adhesion, proliferation, cell morphology, and alkaline phosphatase (ALP) activity of osteoblasts.

RESULTSThe surfaces of the titanium and titanium alloy groups exhibited higher adhesion and proliferation of osteoblasts than those of the mechanical group. The titanium surface was covered with a group of cells, a large number of filopodia, and functional particles. The ALP activity of the titanium group was significantly higher than that of the titanium alloy and mechanical groups.

CONCLUSIONEE method in pure titanium and titanium alloy surfaces result in bowl-like nests and nanostructures of different diameters and depths. The diameters of the pure titanium and titanium alloy surfaces range from 30 to 50 μm and 5 to 8 μm, respectively. The former is more conducive to promote the proliferation and differentiation of cells.

Alloys ; Cell Differentiation ; Cell Proliferation ; Dental Etching ; Humans ; Nanostructures ; Osteoblasts ; Prostheses and Implants ; Surface Properties ; Titanium

Objective To investigate the outcome of high-risk acute non-lymphocytic leukemia treated with sequential low-dose cytarabine and harringtonine(LD-HA) and standard induction. Methods 50 high-risk ANLL. patients (LD-HA group) who were regarded as unfit for intensive chemotherapy were chosen to receive LD-HA. Reinductive treatments with standard regimens would be given for those who did not achieve complete remission. 23 patients DA/HA group given two cycles of standard inductive regimens were taken as the control. Results In LD-HA group 80.0 %. (40/50) reached CR, 2 patients died shortly after inductive therapy. The median leukemia-free survival(LFS) was 19.6 months, and the median overall survival (OS) was 12.2 months. Overall survival was 57.0 % at 1 year, 24.1% at 3 years, and 18.8 % at 5 years. While the CR rate was 73.9 % for DA/HA group, and none died during the inductive therapy. LFS and OS was 19.8 months and 12.1 months, respectively. OS rate was 56.58 % at 1 year, 27.1% at 3 years, and 27.1% at 5 years.There were no difference on OS rates between 2 groups (x2 were 0.009, 0.237 and 1.807, respectively,P ＞0.05). Conclusion In patients who were unfit for intensive chemotherapy, sequential therapy with LD-HA and standard induction improved the rate of complete remission and the duration of survival.

In order to explore tick proteins as potential targets for further developing vaccine against ticks, the total proteins of unfed female Dermacentor silvarum were screened with anti-D. silvarum serum produced from rabbits. The results of western blot showed that 3 antigenic proteins of about 100, 68, and 52 kDa were detected by polyclonal antibodies, which means that they probably have immunogenicity. Then, unfed female tick proteins were separated by 12% SDS-PAGE, and target proteins (100, 68, and 52 kDa) were cut and analyzed by LC-MS/MS, respectively. The comparative results of peptide sequences showed that they might be vitellogenin (Vg), heat shock protein 60 (Hsp60), and fructose-1, 6-bisphosphate aldolase (FBA), respectively. These data will lay the foundation for the further validation of antigenic proteins to prevent infestation and diseases transmitted by D. silvarum.
Animals ; Antigens/*chemistry/immunology ; Arthropod Proteins/*chemistry/immunology ; Electrophoresis, Polyacrylamide Gel ; Female ; Ixodidae/*chemistry/immunology ; Molecular Weight ; Rabbits ; Tandem Mass Spectrometry

The disability and mortality rate of patients with intracerebral hemorrhage are very high. At present, there is no effective treatment to improve the outcome of patients with intracerebral hemorrhage. Mechanical compression of hematoma and release of toxic products are the main causes of primary and secondary brain injury in patients with intracerebral hemorrhage, while safe and effective acceleration of hematoma regression is the key strategy to improve the neurological deficit in patients with intracerebral hemorrhage. Microglia/macrophages are the main phagocytic system that mediates hematoma clearance and are mainly polarized into M1 and M2 phenotypes. Cell surface receptors and possible signal transduction pathways play an important role in regulating the endogenous hematoma regression mediated by microglia/macrophages, and may become a new target for clinical treatment of intracerebral hemorrhage and improvement of the outcomes of patients in the future.

Objective:To explore the application effect of the "combination of virtuality and actuality" practical teaching on Medical Imaging Equipment. Methods:The 2018 medical imaging technology students of Qiqihar Medical University were taken as the observation group, and the study adopted teaching method of "combination of virtuality and reality" in the practical teaching of Medical Imaging Equipment, including in-kind visit teaching (8 learning hours), experimental box circuit measurement teaching (20 learning hours) and virtual simulation teaching (16 learning hours). Besides, the 2017 medical imaging major students (control group) did not conduct virtual simulation teaching. The teaching effect and student achievement were compared between the two groups, and SPSS 17.0 was used to conduct t test and chi-square test. Results:There was significantly improvement in the practical performance of the students in the observation group compared with the control group ( t=6.44, P=0.007); the teaching satisfaction of the two groups was significantly improved ( χ2=5.25, P=0.022), and the teaching satisfaction degree was 100%. Conclusion:The teaching method of "combination of virtuality and reality" can effectively improve students' hands-on ability, strengthens their cognition of abstract principles, and solves the problems of equipment failure analysis, disassembly and installation of large-scale equipment that cannot be completed in physical teaching.

Intracerebral hemorrhage is the bleeding caused by spontaneous non-traumatic rupture of blood vessels in brain parenchyma. It has high disability rate and mortality. A series of injuries after intracerebral hemorrhage will lead to neuronal apoptosis. If apoptotic neurons are not cleared in time, intracellular toxic substances will be released, thereby further aggravating the inflammatory reaction. Therefore, the timely clearance of apoptotic cells is of great significance to the brain homeostasis after intracerebral hemorrhage. At the same time, a large number of phagocytic "eat me" signal phosphatidylserine (PS) will appear on the surface of apoptotic neurons. Microglia, as resident macrophages in the brain, have a variety of PS receptors on their surface, which promote the phagocytosis of apoptotic neurons by microglia and reduce the occurrence of local inflammatory responses.

BACKGROUND: Controversy exists as to the optimal treatment approach for ostial left anterior descending (LAD) or ostial left circumflex artery (LCx) lesions. Drug-coated balloons (DCB) may overcome some of the limitations of drug-eluting stents (DES). Therefore, we investigated the security and feasibility of the DCB policy in patients with ostial LAD or ostial LCx lesions, and compared it with the conventional DES-only strategy. METHODS: We retrospectively enrolled patients with de novo ostial lesions in the LAD or LCx who underwent interventional treatment. They were categorized into two groups based on their treatment approach: the DCB group and the DES group. The treatment strategies in the DCB group involved the use of either DCB-only or hybrid strategies, whereas the DES group utilized crossover or precise stenting techniques. Two-year target lesion revascularization was the primary endpoint, while the rates of major adverse cardiovascular events, cardiac death, target vessel myocardial infarction, and vessel thrombosis were the secondary endpoints. Using propensity score matching, we assembled a cohort with comparable baseline characteristics. To ensure result analysis reliability, we conducted sensitivity analyses, including interaction, and stratified analyses. RESULTS: Among the 397 eligible patients, 6.25% of patients who were planned to undergo DCB underwent DES. A total of 108 patients in each group had comparable propensity scores and were included in the analysis. Two-year target lesion revascularization occurred in 5 patients (4.90%) and 16 patients (16.33%) in the DCB group and the DES group, respectively (odds ratio = 0.264, 95% CI: 0.093-0.752, P = 0.008). Compared with the DES group, the DCB group demonstrated a lower major adverse cardiovascular events rate (7.84% vs. 19.39%, P = 0.017). However, differences with regard to cardiac death, non-periprocedural target vessel myocardial infarction, and definite or probable vessel thrombosis between the groups were non-significant. CONCLUSIONS The utilization of the DCB approach signifies an innovative and discretionary strategy for managing isolated ostial lesions in the LAD or LCx. Nevertheless, a future randomized trial investigating the feasibility and safety of DCB compared to the DES-only strategy specifically for de novo ostial lesions in the LAD or LCx is highly warranted.