In order to help a surgeon to determine a proper canal filing cutting path in a hip replacement operation conveniently, this paper presents a kind of probe with combined structure. Firstly, the doctor can use this kind of combined probe to choose canal filing cutting path. Then, the doctor can use computer to guide the surgeon to file femoral cavity along the selected canal filing cutting path. Through hip replacement corpse experiments, filing effects and used time of using combined probe group and separate control group were analyzed. The experiment results showed that the methods introduced in this paper could lower the difficulty of hip replacement operations, improve the implantation of hip stem prostheses further, and reduce the incidence of surgical complications.
Arthroplasty, Replacement, Hip ; Femur ; Hip Prosthesis ; Humans ; Surgery, Computer-Assisted ; instrumentation

Objective To investigate cardiac troponin I (cTnⅠ) for detecting minor myocardial damage and evaluating the prognostic value in unstable angina (UA) Methods Serum cTnⅠ, creatine kinase isoenzyme MB (CK MB) and a part in cardiac troponin T (cTnT) were measured in 106 (UA) and 44 stable angina (SA) patients as well as 68 cases with normal coronary angiography, 72 healthy subjects Relative risk factors and occurrence of heart events were analyzed Results 61 of 106 patients with UA had elevated cTnⅠ levels (57 5%), but 8 of 44 cases with SA had positive results (18 18%) Among them, only 3 cases had slightly elevated CK MB levels The incidences of heart events were significantly higher in patients with elevated cTnⅠ levels than in patients with normal one The higher cTnⅠ levels was and the more heart events occurred cTnT values was similarly found to be an indicator of increased risk of heart events Conclusion cTnⅠ is a higher sensitive and specific marker for assessing minor myocardial damage cTnⅠ is a strong independent indicator of risk stratification in UA

【Objective】 To explore the precautions of pre-transfusion examination in patients with antibodies to erythrocyte protective solution, discrepant ABO blood typing results, and positive unexpected antibodies, so as to ensure the safety of blood transfusion. 【Methods】 The screen cells were divided into two groups according to the presence or absence of washing reagent red blood cells in normal saline. One group had untreated forward typing cells, antibody screening cells and identification panel, and the other group had saline-washed reverse typing cells, antibody screening cells and identification panel. The experiments were carried out by microcolumn gel method, saline medium method and polyamine method to analyze the effect of red blood cell preservation solution on serum agglutination reaction of specific patients. 【Results】 Among the 8 patients, forward typing was AB (+ ) in 1 patient, B (+ ) in 4, and A(+ ) in 3, and the reverse typing were interfered. The plasma of 8 patients agglutinated with unwashed reverse typing cells (saline tube method), screen cells and identification panels (saline tube method plus cassette method), while not agglutinated with the polybrene method. The interference was eliminated as using washed reverse typing cells (salinetube method), screen cells and identification panels (saline tube method plus cassette method). 【Conclusion】 The erythrocyte preservation solution affected patients’ blood group typing, but not affected the outcome of blood transfusion as no adverse reactions occurred.

Abstract Adolescent online game addiction is a common and typical public health problem for all countries in the world. The United States, the United Kingdom and Germany have taken a series of effective measures in the prevention of adolescent online game addiction, such as strengthening government supervision, improving legislation, promoting industry self-discipline, creating organizations and institutions to prevent and control online addiction, regulating the order of online game market as well as enriching the after school life of teenagers. The article aims to summarize and learn from the practical experiences of the United States, the United Kingdom and Germany, and combine them with the actual situation in China to formulate preventive measures against adolescent online game addiction that are suitable for the Chinese context.

Background and purpose:Chemotherapy is an alternative treatment option, which could still get a therapeutic effect, when the EGFR-TKI treatment of non-small cell lung cancer failed. Studies have shown that RR, TYMS, ERCC1 and TUBB3 have respectively relationship with chemosensitivity of gemcitabine, pemetrexed, platinum-based drugs and microtubule-based chemotherapy drugs.The expression levels of these molecular markers can predict the sensitivity of these chemotherapy drugs. The patients with RRMI, TS, ERCC1 and TUBB3 higher expression have reduced chemosensitivity, and lower expression have increased sensitivity. The purpose of this study was to explore the sensitivity of tumor cell lines with acquired resistance to geiftinib caused byEGFR-T790M mutation to cisplatin, gemcitabine, pemetrexed, vinorelbine, paclitaxel and docetaxel.Methods:MTT assay was used to detect the IC50 values of cisplatin, gemcitabine, vinorelbine, paclitaxel and docetaxel, pemetrexed to PC9 and PC9/GR cells, and to explore the chemosensitivity of lung adenocarcinoma cells to these chemotherapy drugs; Luminex method was used respectively to detect the expression levels of ERCC1 mRNA, TUBB3 mRNA, TS mRNA, and RRM1 mRNA in PC9 and PC9/GR cells. Western blot was used to detect the protein expression levels of ERCC1, TUBB3, TS and RRM1 in PC9 and PC9/GR cells.Results: The IC50 values of cisplatin, gemcitabine and pemetrexed to PC9/GR cells were signiifcantly higher than those to PC9 cells (P<0.05), while the IC50 values of vinorelbine, paclitaxe and docetaxel to PC9/GR cells were signiifcantly decreased (P<0.05). Luminex method showed the expressions of ERCC1 mRNA, TS mRNA and RRM1 mRNA in PC9/GR cells were signiifcantly increased than those in PC9 cells (P<0.05), while the expression of TUBB3 mRNA was signiifcantly decreased (P<0.05). Western blot method showed the expressions of TUBB3, TS and RRM1 protein in PC9/GR cells were signiifcantly increased than those in PC9 cells (P<0.05), while TUBB3 protein expression in PC9/GR cells was signiifcantly decreased (P<0.05). Western blot method analysis result showed that the expressions of TUBB3, TS and RRM1 protein in PC9/GR cells were significantly increased than those in PC9 cells (P<0.05), while TUBB3 protein expression in PC9/GR cells was signiifcantly decreased (P<0.05). Conclusion:The chemosensitivity of lung adenocarcinoma with EGFR-T790M mutation is changed. It has decreased sensitivity to cisplatin, gemcitabine, pemetrexed and increased sensitivity to vinorelbine, paclitaxel and docetaxel. The reason of the change of chemosensitivity of geiftinib-resistant lung adenocarcinoma cell maybe related to the changes of ERCC1 mRNA, RRM1 mRNA and TS mRNA and their protein expressions.

Objective To analyse the X-ray and CT manifestations of sacral primary tumor.Methods 10 cases with sacral primary tumors verified by pathology,including sacral chordoma(n=5),giant cell tumor(n=2),chondrosarcoma(n=2),neurilemmomas(n=1),were analysed retrospectively.Results (1)The manifestations of CT and X-ray of sacral chordoma presented as a midline destructive lesion,involving prominently at sacrum 3～5,with flocculent calcification and irregular bone crests.(2)Giant cell tumor involved predominately sacrum 1～3 with expansile destructive area and commonly in young adults.(3)Chondrosarcoma and neurilemmomas had difference characteristic on X-ray film and CT.One case with chondrosarcoma had bone destruction in sacrum 1～3 and giant mass grow into pelvis.Conclusion CT combined with X-ray film is helpful in diagnosis and differential diagnosis of sacral primary tumors.

Objective: To establish an HPLC method for the simultaneous determination of chloromycetin and metronidazole in chlortalidone and metronidazole spirits. Method:The HPLC method was performed on an NOV-pak C18 (150 mm × 4. 6 mm, 5 μm) column and the mobile phase consisted of methanol and water (75∶25). The flow rate was 1. 0 ml·ml-1, the detection wavelength was 297nm, the temperature of column was 30℃ and the sample size was 20 μl. Result: The calibration curve of metronidazole was linear within the range of 5-80μg·ml-1(r=0. 999 7), and the average recovery was 100. 83% with RSD of 1. 82%(n=6). The cal-ibration curve of chlortalidone was linear within the range of 50-800μg·ml-1(r=0.999 7), and the average recovery was 100.2%with RSD of 0. 55%(n=6). Conclusion: The method is simple, rapid, accurate and reproducible, and can be used in the quality control of chlortalidone and metronidazole spirits.

Recent studies showed that pathology of alcoholic encephalopathy was associated with cerebral vascular damage. TMP (tetramethyl- pyrazine) is widely used in the treatment of cerebrovascular diseases, however, it has not been reported whether TMP can relieve alcohol-induced cerebral vascular damages. The study was performed to investigate the learning and memory, cerebrovascular pathological changes and the expressions of vascular endothelial growth factor (VEGF) and serum levelsofendothelin-1 (ET-1) in the rat model of chronic alcoholic encephalopathy, and explore the effects of TMP intervention on alcoholic encephalopathy. In the present study, the rat model of chronic alcoholic encephalopathy was established by the gavage administration of alcohol; the learning and memory ability was tested by Morris water maze; the expression of VEGF was measured by RT-PCR and Western blot; and the serum levels of ET-1 was measured by radioimmunoassay. We found that alcohol intoxication impaired learning and memory, induced VEGF overexpression and increased ET 1 concentrations. TMP intervention improved learning abilities, increased the VEGF expression and reduced ET-1 level. These results indicate that TMP exhibits therapeutic effects on chronic alcoholic encephalopathy.
Alcohol-Induced Disorders, Nervous System ; complications ; drug therapy ; physiopathology ; Animals ; Cerebrovascular Circulation ; drug effects ; Disease Models, Animal ; Endothelin-1 ; blood ; Learning ; drug effects ; Male ; Memory ; drug effects ; Pyrazines ; pharmacology ; therapeutic use ; Random Allocation ; Rats ; Rats, Wistar ; Vascular Endothelial Growth Factor A ; analysis ; Vasodilator Agents ; pharmacology ; therapeutic use

Objective: To explore the effects of intervention programs during primipara, using the Information-motivation-behavioral skills model (IMB) intervention model on initial exclusive breastfeeding. Method: 206 women of primiparas who were registered to the top three hospitals were selected in Shandong province, 2018. These women were hospitalized in the obstetrics/gynaecology wards during the later periods. IMB model was used to support the intervention programs at the following stages: antenatal period, 1 day postpartum, 3-4 days postpartum and 42 days postpartum. Questionnaire regarding self-efficacy energy meter, knowledge and behavior related to breastfeeding, were used before and after the intervention programs. Results: Through intervention programs, statistically significant differences in breastfeeding self-efficacy scores between the four stages (F=150.680, P=0.000) were recorded. Significant differences were also noticed in scores on knowledge of breastfeeding (F=176.556, P=0.000). Conclusion The application of IMB intervention model in women at childbearing age seemed to be helpful in improving the effect of primary breastfeeding in women at childbearing age.

BACKGROUNDStatin therapy has affected glucose homoeostasis of type 2 diabetes patients, which could be related with bile acids metabolism. Whether bile acid metabolism and the expression of farnesoid X receptor (FXR), liver X receptor-α (LXR-α) and sterol regulatory element-binding protein (Srebp)-1c is regulated by hyperglycemia, or whether simvastatin therapy led to higher glucose is related with down-regulated expression of FXR in diabetic rats remained unclear.

METHODSForty male Wistar rats were randomly divided into four groups: normal control rats, insulin resistance rats, diabetic model rats, and the late simvastatin induced diabetic rats. Normal control rats were fed with standard diet, others were fed with high-fat diet. Diabetic model rats were induced by a single intraperitoneal injection of streptozotocin (STZ). The late simvastatin induced diabetic rats started simvastatin administration after STZ induced diabetic model rats. Characteristics of fasting blood glucose (FPG), lipid files and total bile acids (TBAs) were measured and the oral glucose tolerance test (OGTT) was performed after overnight fasting at the eighth weekend. RNA and protein levels of FXR, LXR-α and Srebp-1c were tested by Western blotting and reverse transcription polymerase chain reaction (RT-PCR).

RESULTSThe insulin resistance rats showed higher glucose, lipid files and lower expression of FXR compared with normal control rats (P > 0.05). The diabetic model rats showed significantly higher glucose, lipid files, TBA and lower expression of FXR compared with insulin resistance rats (P < 0.05). The late simvastatin induced diabetic rats displayed higher glucose and TBA and lower expression of FXR compared with diabetic model rats (P < 0.05).

CONCLUSIONSChanges in bile acid homeostasis, including the alterations of bile acid levels and bile acid receptors, are either a cause or a consequence of the metabolic disturbances observed during diabetic models. Statin therapy induced hyperglycemia may be related with FXR, SHP, LXR-α and Srebp-1 pathways.

Animals ; Blood Glucose ; drug effects ; metabolism ; Diabetes Mellitus, Experimental ; drug therapy ; metabolism ; Glucose Tolerance Test ; Homeostasis ; drug effects ; Insulin Resistance ; physiology ; Liver X Receptors ; Male ; Orphan Nuclear Receptors ; metabolism ; Rats ; Rats, Wistar ; Receptors, Cytoplasmic and Nuclear ; metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Simvastatin ; therapeutic use ; Sterol Regulatory Element Binding Protein 1 ; metabolism