[Objective]To investigate the biomechanical properties of transpedicular impacted grafting(TPIG) after bone loss calculation in the treatment of thoracolumbar compression fracture.[Method]Six fresh human thoracolumbar spine(T12-L2) specimens were tested as 6 models: normal control(group A),compression fracture(group B),TPIG after bone loss calculation(group C),transpedicular grafting(TPG)(group D),TPIG after bone loss calculation + pedicle fixation(group E),TPG + pedicle fixation(group F).Biomechanical analysis was carried out to test the intensity,stiffness,stability and torsion properties between different groups.[Result]The intensity,stiffness and stability of vertebral body and intervertebral disc in group E were higher than those in group F,with significant difference(P

Objective To perform the serological identification of anti‐E and anti‐Mur found in the detection before blood trans‐fusion and to analyze its clinical significance in blood transfusion .Methods The reaction pattern of serum with the antibody screen‐ing spectrum was detected by using the micro‐column gel method for identifying the antibody type and specificity .Results The 3 kinds of antibody anti‐E IgG combined with anti‐Mur IgG + IgM existed in the serum of 2 patients .Conclusion Anti‐E and anti‐Mur all are easier to lead to the hemolytic blood transfusion reaction .Selecting the suitable donor on the basis of the accurate anti‐body identification can provide guarantee for blood transfusion safety .

Objective To evaluate the application of Erytra automatic blood analyzer (Erytra) on blood grouping and cross matc‐hing .Methods 9 860 cases of EDTA‐K2 anticoagulant specimens for blood grouping test and 5 099 cases of EDTA‐K2 anticoagu‐lant specimens for cross matching were both detected by Erytra and manual tube method .Results There was no significant differ‐ence in the accuracy of blood grouping detected by Erytra and manual tube method (P>0 .05) .Both of the positive rate and the false positive rate of cross matching detected by Erytra were higher than those detected by manual tube method .Conclusion Erytra automatic blood analyzer can be applied for the detection of blood grouping and cross matching ,and its performance can meet the needs of blood safety in clinic .

Objective The purpose of this study was to examine the status quo of the perceptions of professional benefits in the clinical teachers of nursing,analyze the influencing factors and put forward effective measures to improve it.Methods A convenience sample of 117 nurse preceptors in 4 teaching hospitals participated by completing a two-part questionnaire the Preceptor's Perception of Benefits and Rewards Scale and a demographic questionnaire.Results The total average score of benefits and rewards to the preceptor role was(63.64±9.93) points,low than the study done by Hyrkas(2007) in American.Nurse preceptors in different nursing unit felt different benefits and rewards to the preceptor role.Medicine unit and surgical unit were higher than Pediatrics unit.The longer time of being preceptor,the higher score of benefits and rewards to the preceptor role.Conclusions The score of benefits and rewards to the preceptor role is low.Hospitals should increase support for clinical teaching program,particularly pediatrics.Nurse managers should adjust promotion opportunities,workload,rewards of nurse preceptors to meet the needs of nurses in clinical teaching and to improve teaching effectiveness.

Objective: The purpose of this research is to investigate the relationship between computer game addiction,a subtype of internet addiction,and parental Rearing styles.Methods: Using Computer Game Addiction Inventory(CGAI) and EMBU,we investigate a sample of 747 senior high school students in Beijing.According to whether participants' sum score of five dimensions of CGAI is larger than 1.5 SD,we divide them into two groups: tendency to addiction and non-tendency to addiction.Then we analyze the data with methods of MANOVA and Canonical Correlation.Results: There is significant difference in sex distributing between tendency to addiction and non-tendency to addiction.There is also significant difference in parental rearing styles between two groups.Under authoritarian rearing styles,children score higher on nearly every dimension of CGAI.Conclusion: Boys are more likely to get addicted to computer games than girls.Negative parental rearing styles associate closely with computer game addiction.

Objective To explore the correlation between the length of peristaltic break (LPB) and the severity of the symptoms in patients with non-erosive reflux disease (NERD) and negative pH monitoring.Methods A total of 35 patients with NERD and negative pH monitoring were enrolled,and at same time 10 healthy individuals were selected as controls.The LPB of esophageal body of both groups was measured by high resolution manometry (HRM).Meanwhile,the symptom of NERD patients with negative pH monitoring was scored.The LPB of esophageal body between the two groups was compared by t test.The correlation between the LPB and the severity of the symptoms in NERD patients with negative pH monitoring was analyzed by Pearson correlation analysis.Results The average LPB of esophageal body of NERD patients with negative pH monitoring was (3.3±0.9)cm,which was longer than that of healthy controls ((1.2 ± 0.4) cm),and the difference was statistically significant (t=9.17,P＜0.01).The symptom score of NERD patients with negative pH monitoring was 21.6± 7.8.There was a positive correlation between the LPB and NERD symptom score (r=0.894,P＜ 0.01).Conclusion The LPB of esophageal body is a kind of expression of esophageal motility dysfunction,which is correlated with the symptom of NERD.

Objective To observe the clinical efficacy of midnight-noon ebb-flow needling based on individualized timing in treating senile chronic gastritis. Method Seventy-eight elderly patients with chronic gastritis were randomized into a treatment group of 39 cases and a control group of 39 cases. The treatment group was intervened by midnight-noon ebb-flow needling based on individualized timing, while the control group was by midnight-noon ebb-flow needling based on local mean solar time, 10 d as a treatment course. The clinical efficacies were observed after 2 treatment courses. Result The total effective rate was 94.9% in the treatment group versus 89.7% in the control group, and the difference was statistically insignificant (P>0.05); the recovery rates were respectively 46.2% and 28.2%, and the difference was statistically significant (P<0.05). Conclusion Midnight-noon ebb-flow needling based on individualized timing can produce a significant efficacy in treating senile chronic gastritis, and is worth promoting in clinic.

The improvement of the electroosmotic pump properties and the effects of the bi-directional electrostacking system on the pre-concentration factor were investigated.A portable electrokinetic flow analysis system with electroosmotic driving and bi-directional electrostacking unit was introduced.The improved system with graphite furnace atomic absorption spectrometry was employed to separate,pre-concentrate and determine Cr(Ⅵ) and Cd(Ⅱ)in mineral water.The detection limit of Cr(Ⅵ)and Cd(Ⅱ)was 9 ng/L and 10 ng/L(3б of blank,n=11),respectively.Their recoveries of 200ng/L Cr(Ⅵ) and 100ng/L Cd(Ⅱ) added to samples were(105～107)±2% and (104～106)±2%(n=3).

ObjectiveTo observe the effect of exercise on expression of protein kinase B (PKB) in adipose tissue of insulin resistant rats fed by high fat diet.Methods30 male Wistar rats were randomly divided into the control group (n=10),given basic diet; the model group (n=20), given fat diet. After 4 weeks, the model group was randomly divided into 2 subgroups, the insulin resistant group was continually given high fat diet, the exercise treated group accepted high fat food and swimming training. After 6 week intervention, the expression of PKB stimulated by insulin in adipose tissue was determined with Western blotting at the end of experiment.ResultsAfter long term high fat diet, expression of PKB in adipose tissue of the insulin resistant group decreased by 23.5% comparing with the control group (P<0.01). After 6 weeks swimming training, the expression of PKB of the exercise treated group was increased by 19.2% comparing with the insulin resistant group (P<0.01).ConclusionExercise treatment can significantly elevate the expression of PKB and ameliorate the state of insulin resistance.

Objective To examine the interrelations among vascular calcification, bone denaity,osteoprotegerin (OPG) and soluble receptor activator of NF-kB ligand (sRANKL) in maintenance hemodialysis (MHD) patients. Methods The levels of serum OPG and sRANKL from 39 MHD patients were measured by ELISA. The vascular calcification was detected by plain radiographs. Bone mineral density (BMD) was measured with dual-energy X-ray absorptionmeter.Interrelations among above parameters were examined statistically. Results (1) Among 39 MHD patients, 25 cases were identified as vascular calcification by radiographic film. The proportion of patients with mild vascular calcification was 41.0% (16 cases), moderate and severe vascular calcification was 23.1% (9 cases). Compared to patients with mild vascular calcification,serum OPG level [(342.50±171.53) ng/L vs (206.21±137.88) ng/L,t=-2.253, P=0.0251 and OPG/sRANKL ratio (454.65±455.63 vs 135.31±136.81, t=59, P=0.035)were significantly higher in patients with moderate and severe vascular calcification,while serum sRANKL level [(0.10±0.08) pmol/L vs (0.12±0.08) pmol/L, t=0.534, P>0.05] was not significantly different. Multiple linear regression analysis showed that OPG/sRANKL ratio was independent factor of vascular calcification score. (2)Compared to patients with normal bone volume, the patients with abnormal bone volume had higher serum OPG level [(249.05±137.66) ng/L vs (226.67±170.12) ng/L], lowerserum sRANKL level [(0.11±0.08) pmol/L vs (0.12±0.02) pmol/L], and higher OPG/sRANKL ratio(202.31±219.24 vs 148.08±210.10), but these parameters were not significantly different betweenthese two groups. Multiple linear regression analysis showed that OPG/sRANKL ratio was anindependent factor of T score of lumbar vertebra. (3)Muhiple linear regression analysis revealed that vascular calcification score was an independent factor of T score of lumbar vertebra and hip.Conclusions Vascular calcification score is an independent factor of BMD of lumbar vertebra and hip in MHD patients. Serum OPG/sRANKL ratio may play an important role in the association between vascular calcification and BMD in MHD patients.