Objective To research and prepare the individualized knee in vitro guided plate by 3D printing technique and to investigate the feasibility of its application in 8-plate epiphysiodesis.Methods Twelve children patients with knee varus or valgum in our hospital from January 2014 and November 2016,7 boys and 5 girls,average age of 8.2 years old,were performed the lower extremity continuous spiral CT scanning in the knee straight position.The Dicom format stored CT data were imported into software Mimics 15.0 for reconstructing the knee joint 3D model.The knee joint data after reconstruction were guided into software Geomagic1 1.0 with the.stl format.According to the demand that screws without perforating epiphyseal and joint surface,paralle ling to the epiphyseal and locating in the anterior-posterior median line of epiphyseal,the 8-plate placing screw navigation template was designed and printed by using the 3D printing technique;the 8-plate plate and screw internal fixation was conducted by intraoperative template location.The placed screw position was evaluated by postoperative CT.Results The imaging identification showed that 8-plate epiphysiodesis by using 3D printing individualized in vitro guided plate had accurate screw placement.The cases were followed from 6 months to 2 years,the satisfactory orthopedic effect was obtained in all cases.Conclusion Preparing the individualized knee in vitro guided plate by applying 3D printing technique in assisted 8-plate epiphysiodesis for treating child knee varus or valgum has accurate screw position and satisfactory effect.

Objective To investigate the cytotoxicity and radiosensitization of 5-nitroindazole-3-formyliminodiacetic acid on HeLa cells.Methods HeLa cells in exponential growth phase were incubated in culture media with different doses and the survival rate was determined by MTT assay.The survival rate of cells receiving radiation combined with different doses of medicine was compared with that of the control.Results The cytotoxicity of S-nitroindazole-3-formyliminodiacetic acid on HeLa cells was very low.The drug had hypoxia radiosensitizing effect on HeLa cells.At doses of 0,6,12,24,48 and 96 μg/ml under hypoxia ,the survival rate were 0.91 ,0.87,0.84,0.81 ,0.76 and 0.60,respectively.At the dosage of 48 and 96 μg/ml,the survival rate were 0.85 and 0.73 under oxygenous).Conclusions 5-Nitroindazole-3-formyliminodiacetic acid has low cytotoxicity and rediosensitizing effect on HeLa cells.

Objective To establish a method for content determination of harpagide and harpagoside in Mailuoning injection by HPLC. Methods The experimental condition of HPLC method was as follows: SunfireTM C18 column (4.6 mm ×150 mm, 5 μm), with gradient elution using acetonitrile and 0.03% phosphoric acid; the detected wavelength was 210 nm, and the flow rate was 1.0mL/min.ResuIts Harpagide and harpagoside demonstrated good linear relationship in the range 0.1424~0.8544 μg/mL(r=0.9998) and 0.0732~0.4392μg/mL (r=0.9997) respectively.The average recovery rate were 98.22% and 99.27% with RSD of 1.46% and 1.42%(n=6)respectively.ConcIusion The method is simple, reliable, accurate, reproducible and stable, and it could be used in the determination of harpagide and harpagoside in Mailuoning injection.

Objective To build convenient structure ,efficient and intelligent transfusion information system ,improve the quality of services to meet the needs of clinical applications and hospital management ,and make the core concept of “quality safety” practi‐cable by the information system .Methods Establish a blood transfusion information system based on the theory of hospital bionic management in hospital .Results The transfusion information system which constructed from bionic management theory can fully realize the design goals and satisfy all types of users .Conclusion Bionic management with the features of integrity ,auto correla‐tion ,ideology and culture has good potential for growth ,and could play a great directive role on hospital information system .

Objective To investigate the efficacy of statin on carotid plaque stability in elderly patients assessed by K trans (the combination of E and F) of dynamic contrast material enhanced (DCE) magnetic resonance (DCE MR) imaging.Methods 37 elderly patients with carotid artery of low echo or mixed echo plaque in carotid artery patches were screened by B type ultrasound.According to the standard of 2011 ESC/EAS guidelines,all patients were divided into two groups:normal level of LDL-C group achieving LDL-C target and high level of LDL C group not achieving target of LDLC.Plaque area and size of lipid-rich necrotic core were measured by 3.0T enhancement magnetic resonance,and K trans was measured by DCE-MR dynamic contrast material enhanced (DCE) magnetic resonance (MR) imaging.and serum hs-C-reactive protein level was detected within 1 week.Results Plaque area,size of lipid-rich necrotic core,ratio of lipoid core over plaque area,K trans and serum level of hs-CRP were less in normal LDL-C level group than in high LDL-C level group [(2.06±0.45) mm2 vs.(3.63±0.62) mm2,(0.52±0.05) mm2 vs.(1.49±0.01) mm2,2 cases (11.8％) vs.14 cases (70.0％),(0.041±0.009) min1 vs.(0.079±0.011) min-1,(1.60±0.27) mmol/L vs.(2.80 ± 0.34),all P＜0.05].Linear regression analysis revealed that there was no significant correlations of K trans with the size of lipid necrotic core (r=0.19,P＞0.05) and hs-CRP (r=0.23,P＞0.05).Conclusions Dynamic contrast material enhanced (DCE) magnetic resonance (MR) imaging is a quantitative method assaying atheromatous plaque components; K trans may be a new indicator to measure the stability of plaques; Statin can stabilize plaques through inhibiting the proliferation of Vasa vasorum in plaque angiogenesis,anti-inflammatory and reducing the size of lipidrich necrotic core.

Objective To compare the clinical and ultrasound features of Klebsiella pneumoniae liver abscess(KPLA) in dia‐betes mellitus(DM ) patients with different levels of HbA1c .Methods Totally 146 patients with diabetes mellitus of Klebsiella pneumoniae liver abscesses(KPLA‐DM )were divided into three groups on the basis of their levels of HbA1c:complete glycemic controlled (HbA1c≤7% );good glycemic controlled (7% < HbA1c≤9% );bad glycemic controlled (HbA1c>9% ) .The patients′characteristics ,clinical features ,ultrasound features and complications among the three groups were compared .Results Compared with patients in complete glycemic controlled group and good glycemic controlled group ,patients in bad glycemic controlled group had lower onset age and longer length of hospital stay(P<0 .05) ,are more susceptible to underlying diseases such as hyperlipoi‐demia and chronic renal failure(P<0 .05) ,had more life‐threatening clinical crisis ,and had higher infection rate(P<0 .05) .KPLA‐DM could be characterized by patchy ,mass like enhancement echoultrasound image .Patients in bad glycemic controlled group al‐so had higher risk of biliary pneumatosis ,hepatic venous thrombosis and gas‐forming pyogenic liver abscess than other two groups (P<0 .05) .Conclusion The ultrasound image of KPLA has characteristics .The occurrence of hepatic venous thrombosis and gas‐forming observed by ultrasound is associated with bad glucose control in KPLA‐DM patients ,which suggests that there may be oth‐er complications such as metastatic infection .

Objective To investigate the molecular epidemiological characteristics and homology of Staphylococcus aureus (S. aureus)isolated from patients in intensive care units (ICUs)of a hospital,so as to provide laboratory basis for the effective control of healthcare-associated infection(HAI). Methods 62 S. aureus strains isolated from various specimens from ICU patients with infection in March-August 2013 were collected,7 housekeeping genes were amplified with polymerase chain reaction (PCR),the amplified products were sequenced,ST typing of strains was performed by multilocus sequence typing (MLST ), phylogenetic analysis of ST typing was conducted. Results 62S. aureus strains were amplified specific product of 7 housekeeping genes;there were 10 ST genotypes, in which 2 ST genotypes(STn1and STn2)were first discovered,1 ST genotype(ST675)was first discovered domes-tically. ST239 was the main ST type of S. aureus from ICU patients in this hospital,accounting for 74.20% ,which distributed in 6 ICUs,ST5 distributed in 3 ICUs. 62 strains formed 7 main branches in the phylogenetic tree,55 (88.71% )MRSA strains were detected. Conclusion S. aureus isolated from hospital ICUs has some homology, and the small number of types showed the trend of concentrated distribution.

OBJECTIVETo investigate the influence of seasons, blood types and semen parameters on the cryosurvival rate of frozen-thawed spermatozoa from sperm donors.

METHODSWe retrospectively analyzed the influence of seasons, blood types, abstinence period, semen volume, sperm morphology, and pre-freeze sperm motility and concentration on the cryosurvival rate of frozen-thawed sperm in 4 088 semen samples from Shaanxi Human Sperm Bank.

RESULTSThe cryosurvival rate of the post-thaw sperm was correlated negatively with the progressive motility of the pre-freeze sperm (r = -0.262, P < 0.01), but positively with pre-freeze sperm concentration (r = 0.247, P < 0.01), and it was significantly higher in the 6-day abstinence group ([70.2 +/- 5.4]%) than in the other abstinence groups (P < 0.01), so was it in the normal sperm morphology rate > 20% group ([71.4 +/- 5.1]%) than in the others (P < 0.01). The survival rate of the post-thaw sperm was not correlated with seasons, blood types, and semen volume (P > 0.05).

CONCLUSIONSperm motility, concentration and morphology and the abstinence period of sperm donors may be valuable predictors of the cryosurvival rate of post-thaw sperm, but no correlation was found between the survival rate and seasons, blood types and semen volume.

Objective To study the effect and mechanism of human gastric cancer cell's apoptosis in simulated CO2 pneumoperitoneum environment by HIF-1α. Methods We used a closed box to simulate CO2 pneumoperitoneum environment, a standard surgical insufflator maintained pressure of the box at 0,5,10 and 15 mm Hg respectively. MKN-45 cell's HIF-1α mRNA and protein expression were observed before and after silencing cell's HIF-1α by real time RT-PCR and Western blot. Cell's bcl-2/bax was studied by immunohistochemistry before and after silencing HIF-1α. Cell's apoptosis ratio was measured using Annexin V-FITC/PI double labelled staining. Results In 15 mm Hg group, MKN-45 cell's HIF-1α mRNA and protein expression were significantly higher than control group (P<0.01 ), while the difference was not significant among 0,5,10 mm Hg group and control group (P>0.05). In 15 mm Hg CO2 pressure, cell's bcl-2/bax was obviously lower than in control group (P<0.05) and apoptosis ratio was more than control group(P<0.01). When HIF-1α was silenced, cell's bel-2/bax and apoptosis ratio weren't significantly different between 15 mm Hg group and control group (P>0.05 ). Conclusions MKN-45 cell's apoptosis did not experience any alterations under 0,5,10 mm Hg.15 mm Hg CO2 pneumoperitoneum environment enhanced cell's apoptosis probably by way of HIF-1α.

Objective To investigate the frequency distribution of Val762Ala(T2444C)polymorphism among Han Chinese population in Gansu province,and to explore its relation to the suseeptibihty to gastric cancer. Methods A hospital-based,case-control study was performed involving 138 patients with gastric cancer and 110 healthy controls by PCR-RFLP method.Logistic regression and Chisquare analyses were used to assess OR and 95% CI. Results PARP-1762Ala allele was overexpressed in gastric cancer cases(11.5%)compared with controls(4.5%)(OR=3.012,95%CI 1.054-8.603,P=0.033).Statistic analysis showed increaged risk for gastric cancer patients with the 762Ala allele.Conclusion PARP-1 Val762Ala(T2444C)is related to the risk of gastric cancer,PARP-1762Ala allele could be used as a susceptibility marker for the development of gastric cancer.