AlM:To analyze and compare the effect of femtosecond laser micro - incision corneal stromal lens excision ( SMlLE) and excimer laser in situ keratomileusis ( LASlK) in the treatment of myopia after operation, to explore the safety, operability and prediction of SMlLE.METHODS:ln this prospective clinical controlled study, 100 cases ( 200 eyes ) received SMlLE and 100 cases ( 200 eyes) undergone LASl in our hospital in the same period were selected. Uncorrected visual acuity, diopter, corrected visual acuity, slit lamp examination, intraocular pressure and corneal anterior segment OCT, corneal topography (Obscan ll) of two groups in 1d, 1wk, 1, 3, 6mo, 1a were compared. lndependent samples t test was used for data analysis.RESULTS:1) Postoperative slit lamp examination:after 1d in SMlLE group, there were less eyes had corneal layer between mild cloudy or edema; postoperative 1wk corneal layer disappeared, cornea became clear and transparent. 2 ) Postoperative vision recovery: 1d after operation, vision recovery in LASlK group was better than that in SMlLE group, the difference was statistically significant (P<0. 01), there were no significant differences at 1wk, 1, 3, 6mo, 1a after operation ( P>0. 05 ). 3 ) Obscan ll examination: graphics in the SMlLE group was more regular and placed in the center, no eccentric and irregular graphics, better than that in the LASlK group. 4) Anterior segment OCT examination:postoperative corneal flap in the SMlLE group was more uniform and accurate, but it was thin in the center and slightly thick the peripheral part in the LASlK groups. 5 ) Postoperative visual quality assessment used subjective questionnaire survey. The two groups had statistically significant difference on 4 points and 1 points (P<0. 05). Complains in the LASlK groups were more that that in the SMlLE group. While, no complain of the SMlLE group was higher than that of the LASlK group. Glare of postoperative patients with night vision and dark environment in the SMlLE group was better than that of the LASlK group.CONCLUSlON: SMlLE is safe, effective, stable and predictable for the correction of myopia.

OBJECTIVETo compare postoperative blood loss under different negative pressures of drainage after total hip arthroplasty for the treatment of femoral neck fractures.

METHODSFrom January 1st to December 30th 2013, 74 patients with femoral neck fractures treated with total hip arthroplasty were randomly divided into two groups: high negative pressure drainage group and low negative pressure drainage group. In high negative pressure drainage group, there were 34 cases including 10 males and 24 females, with a mean age of (75.94 ± 9.02) years old, and the patients were treated with 60 kPa negative pressure of drainage. In the low negative pressure drainage group, there were 40 cases including 13 males and 27 females, with an average age of (74.93 ± 8.90) years old, and the patients were treated with 30 kPa negative pressure of drainage. The amount of total drainage, total blood loss, and hemoglobin change were compared between these two groups.

RESULTSAll the patients got primary healing without infections. In high negative pressure drainage group,the change of hemoglobin was (41.74 ± 15.69) g/L, total blood loss was (1,217.73 ± 459.50) ml and the drainage volume was (312.94 ± 103.44) ml; while in low negative pressure drainage group,the results were (34.90 ± 12.90) g/L, (904.01 ± 381.58) ml and (129.25 ± 44.25) ml separately. All the results in high negative pressure drainage group were higher than those in the other group. Three days after operation, the change of hemoglobin was (46.00 ± 13.29) g/L and total blood loss was (1,304.72 ± 421.75) ml; while in low negative pressure drainage group, the changes of hemoglobin was (43.87 ± 11.39) g/L and total blood loss was (1,196.78 ± 344.20) ml; there were no statistically significant differences between two groups.

CONCLUSIONWhen placing drainage devices after total hip arthroplasty for the treatment of femoral neck fractures, the level of negative pressure should be chosen according to preoperative level of hemoglobin and HCT in patients. For old patients with femoral neck fracture, low negative pressure is more suitable.

Aged ; Aged, 80 and over ; Arthroplasty, Replacement, Hip ; methods ; Case-Control Studies ; Female ; Femoral Neck Fractures ; surgery ; Humans ; Male ; Middle Aged ; Negative-Pressure Wound Therapy ; Postoperative Hemorrhage ; prevention & control

BACKGROUND: For recent decades, there has been a younger tendency in age of occurrence of the cervical spondylosis, and posterior fusion is the main method for cervical degeneration and injury, but no relevant fixation parameters are available in clinical practice for adolescents. OBJECTIVE: To measure the anatomical parameters of C4-6posterior fixation in the adolescents aged 12-14 years after three-dimensional reconstruction. METHODS: Twenty-one adolescents aged 12-14 years, who underwent cervical examination at the Affiliated Hospital of Inner Mongolia Medical University and Department of Orthopedics of the Second Hospital of Ulanqab between January 2014 and December 2016 were randomly selected, and the CT data of the C4-6were collected, and then imported into Mimics16.01 software for three-dimensional reconstruction. We measured the anteroposterior and transverse diameters and the heights of the vertebral body, anteroposterior and transverse diameters of the transverse foramina, angles of the left and right pedicle axes to sagittal and horizontal axes, and left and right pedicle axis lengths. RESULTS AND CONCLUSION: (1) Both anteroposterior and transverse diameters of the transverse foramina were increased with vertebral level incveasing. Both angles of pedicle axis to sagittal and horizontal axes, and pedicle axis lengths were increased with vertebral level. The anteroposterior diameter of the vertebral body at C4-6was in the range of 6.0-8.0 mm, the transversal diameter was in 25.0°-30.0°, the angle between the posterior screw and the horizontal axis was 29.0°-35.0°; in the sagittal plane, the angle to the sagittal axis was no more than 5°; and the pedicle screw path length was in 6-7 mm. (2) These results show the anatomical parameters of C4-6posterior fixation in the adolescents aged 12-14 years are successfully obtained by three-dimensional reconstruction.

0.05. Conclusion The tumour chemosensitivity test in vitro gave some prediction and guidances for the clinic chemotherapy,and it could discover the drug resisting cases.The combined chemotherapy should be selected for gastric carcino- ma patients.

To evaluate the immunogenicity of inactivated SARS coronavirus (SARS-CoV), three groups of rabbits were immunized three times at 2-week intervals with inactivated vaccine + adjuvant, adjuvant,and normal saline respectively. Eight batchs of serum were sampled from the auricular vein at day 7 to day 51, and specific IgG antibody titers and neutralizing antibody titers were detected by indirect ELISA and micro-cytopathic effect neutralizing test. Antibody specificity was identified by proteinchip assay.Histopathological changes were detected by H&E staining. The results showed that, rabbits in the experimental group immunized with inactivated SARS-CoV all generated specific IgG antibodies with neutralizing activity, which suggested the inactivated SARS-CoV could preserve its antigenicity well and elicit an effective humoral immune responses. The peak titer value of specific IgG antibody and neutralizing antibody reached 1:40960 and 1:2560 respectively. In the experimental group, no obvious histopathological changes was detected in the H&E stained slides of heart, spleen, kidney and testis samples, but the livers had slight histopathological changes, and the lungs presented remarkable histopathological changes. These findings are of importance for SARS-CoV inactivated vaccine development.

Little is known about the non-structural protein 6(NSP6)of rotavirus.This report describes expression of the NSP6 of a group A human rotavirus strain TB-Chen in bacteria,and its immunological properties and cellular distribution.The results showed that the recombinant NSP6(rNSP6)was expressed in high efficiency without any other proteins fused(possesses about 34.2% of total bacterial proteins).rNSP6 elicited mono-specific antibodies in immunized guinea pigs and the antibodies could react with the rNSP6 itself and the viral NSP6 proteins synthesized in SA11-or Wa-infected MA104 cells in Western blot and immunofluorescence assay.The NSP6 distributed evenly in the cytoplasm mainly around the nucleus of virus-infected cells,no viroplasm-like gathering observed;The top amount of NSP6 synthesized in SA11-infected cells or Wa-infected cells could be detected at 12h after infection.This is the first report about the high expression of entire NSP6(without any other proteins fused)in prokaryotic expression system and detection of NSP6 synthesis in virus infected cells by immunofluorescence assay.The results are important to understand the structure,biological properties and further application of the NSP6.

OBJECTIVEThis study aims to investigate relationship between daily concentration of PM(10), SO(2), NO(2) and daily mortality due to circulatory system diseases in Chaoyang district, Beijing.

METHODSThe time-series data of daily mortality from circulatory system diseases of registered residents in Chaoyang were obtained from Chaoyang District Center for Disease Control and Prevention. The daily concentration of sulfur dioxide (SO(2)), nitrogen dioxide (NO(2)), and particulate matter (PM(10)) were collected from Beijing Municipal Environmental Monitoring Center. And the routine monitoring meteorological data were collected from Beijing Meteorological Bureau, including daily mean temperature and daily mean relative humidity. The time-series analysis was then conducted to determine the relationship of mortality from circulatory system diseases with daily concentrations of SO(2), NO(2) and PM(10) by using Poisson regression with generalized additive model (GAM).

RESULTSDuring January 2004 to September 2008, the cumulative death number from circulatory system diseases of registered residents in Chaoyang district of Beijing was 19 241, the daily average concentration of SO(2), NO(2), PM(10) was 48.7, 63.9, 146.1 µg/m(3), respectively. The single pollutant model showed an increase of daily concentration of PM(10), SO(2) and NO(2) by 10 µg/m(3) will augment the mortality from circulatory system diseases by 0.20% (95%CI: 0.01% - 0.39%), 0.36% (95%CI: -0.13% - 0.85%) and 0.30% (95%CI: -0.34% - 0.94%), respectively. In the multiple air pollutants models, combinatorial effects of PM(10) and SO(2) still positively correlated with increased mortality from circulatory system diseases (P < 0.05), whereas changes of the concentration of NO(2) had no significant effect on mortality from circulatory system diseases (P > 0.05).

CONCLUSIONOur findings in this study elucidated that changes of the concentration of PM(10) and SO(2) had a positive correlation with daily mortality from circulatory system diseases among the local residents in Chaoyang District, whereas the daily concentration of NO(2) was irrelevant with that.

Aged ; Air Pollutants ; analysis ; Air Pollution ; analysis ; Cardiovascular Diseases ; epidemiology ; mortality ; China ; epidemiology ; Environmental Monitoring ; Female ; Humans ; Male ; Models, Theoretical ; Nitrogen Dioxide ; analysis ; Particulate Matter ; analysis ; Sulfur Dioxide ; analysis ; Survival Rate ; Time Factors

Objective To develop a new isotope dilution gas chromatography mass spectrometry method (ID/GC/MS) for the measurement of serum cholesterol.Methods Serum was mixed with an isotope labeled internal standard ([3,4-~(13)C]-cholesterol) and treated with alcoholic sodium hydroxide to hydrolyze cholesterol ester to cholesterol.Cholesterol and internal standard was extracted and derived by N, O-Bis(trimethylsilyl) trifluoroacetamide to trimethylsilyl ethers.The derivation products were analyzed by capillary column GC combined with electron impact MS using scan and selected ion monitor (SIM) modes. Signals of cholesterol internal standard were corrected for the contributions from cholesterol and the signal ratio of cholesterol to internal standard for the calibrators were linearly regressed against cholesterol concentrations.The resulted regression equation was used for the calculation of serum cholesterol concentrations.Results The new ID/GC/MS method showed a mean within-run coefficient variance (CV) of 0.04%-0.81%.Comparison with two levels of standard reference material (SRM1951a) of National Institute of Standards and Technology (NIST) displayed a bias of 0.19% and 0.90% respectively.Conclusion A time-gaining ID/MS method has been established that is highly precise and accurate and can be used for the measurement of serum cholesterol.

OBJECTIVETo compare the differences between external fixator and volar T-shaped plate in the treatment of complicated fractures of the distal radius and ulna, and evaluate the appropriate operation method for the fractures.

METHODSFrom July 2005 to July 2007, forty-eight cases of complicated fractures of the distal radius and ulna were treated with operation. There were 21 males and 9 females in the internal fixator group, ranged from 22 to 52 years old (with an average of 38.4 +/- 1.5 years). There were 10 mals and 8 femals in the external fixator group,ranged from 25 to 56 years old (with an average of 40.5 +/- 2.3 years). The X-ray films were measured to acquire radial length, palmar tilt and radial inclination after operations. The functional evaluation were scored with a modified Gartland and Werley's (GW) scoring system at 6 and 12 months after operation.

RESULTSThe patients were followed up for 12 to 18 months with an average of 14.2 months. The radial length was (8.82 +/- 0.55) mm, palmar tilt (9.23 +/- 0.86) degrees, radial inclination (19.66 +/- 1.38) degrees in the internal fixator group, while those were (8.25 +/- 0.36) mm, (8.56 +/- 0.72) degrees, (18.82 +/- 1.42) degrees in the external fixator group. The film parameter of internal fixator group was better than the external fixator group, but with no statistical significance (P > 0.05). In the internal fixator group, 16 cases obtained excellent, 7 good, 5 fair, 2 poor, while in the external fixator group, 4 cases obtained excellent, 2 good, 8 fair, 4 poor in 6 months. The GW scores of internal fixator group were lower than that of the external fixator group (P < 0.05). At 12 months after surgery, in the internal fixator group, 17 cases obtained excellent, 7 good, 5 fair, 1 poor; while in the external fixator group, 5 cases obtained excellent, 9 good, 2 fair, 2 poor. The GW score was similar between the two groups (P > 0.05).

CONCLUSIONThe volar T-shaped plate fixation may offer effective stability,the short-term outcome is better than the external fixator group,and there are relatively fewer complications. But the treatment outcome of the two operation methods are similar for the long time follow up.

Adult ; Bone Plates ; External Fixators ; Female ; Fracture Fixation, Internal ; methods ; Humans ; Male ; Middle Aged ; Radius Fractures ; physiopathology ; surgery ; Ulna Fractures ; physiopathology ; surgery

Objective To establish an automatic synthesis method for 11C-carfentanil (CFN) as an novel opiate receptor radioligand and study its biodistribution in rats. Methods 11C-Triflate-CH3 was bubbled into 0.5 mg precursor desmethyl-CFN (which was dissolved in 0.15 ml DMSO) to generate 11C-CFN in a V-tube at room temperature. Sep-Pak C2 column was used for purification of 11C-CFN, which was eluted by 3ml binary system aqueous solution, 10 ml water thrice, and then I ml ethanol. The biodistribution (% ID/g) of 11C-CFN in SD rats was studied. SPSS 13.0 was used for statistical analysis. Non-normal distribution data were analyzed using nonparametric test. Results The synthesis time for 11C-CFN was 20 min (end of bombardment, EOB). The synthesis yield was (35.5 ± 2.2) % on average (n = 12, uncorrected)with the radiochemical purity over 98%. Biodistribution study in rats showed that the tracer had a high brain uptake, rapid blood clearance, and a metabolic pathway via liver and kidney. The highest tracer uptake was in thalamus (4.26 ± 0.89) % ID/g and striatum (4.05 ± 1.08) % ID/g at 5 min after injection, followed by cerebral cortex (2.63±0.89) %ID/g, pons (2.26 ±0.57) % ID/g, hippocampus (2. 17 ±0.55) %ID/g and cerebellum (2. 15 ±0.39) %ID/g. Conclusions The automatic synthesis of 11C-CFN is fast and reliable, and this radioligand can be used for opiate receptor imaging.