Objective To evaluate the clinical significance of anatomic reduction and internal fixation of posterior malleolar fracture in ankle fracture surgical treatment. Methods Fifty-four patients with posterior malleolar fracture were treated with anatomic reduction and internal fixation from March 2005 to June 2010. The patients groups consisted of 36 males and 18 females. According to CT scan classification,the group was made up of 36 type Ⅰ cases, 10 type Ⅱ and 8 type Ⅲ cases. All patients were evaluated with modified Baird-Jackson scoring system. The relationship between final result and fracture pattern , fixation methods, the time of exercise initiation fitted operation were analyzed respectively. Results The followedup period varied from 6 months to 36 months, with an average of 18 months. The number of patients whose result was excellent, good, fair and poor was respective 29,18 ,5 and 2. The total percent age of good to excellent clinical result was 87. 03%. There were 4 patients who had only slight pain after long time walking ,the remainder patients were completed with no pain. Conclusion Operative treatment may provide satisfactory fracture anatomic reduction and internal fixation for posterior malleolar fracture. Correct fracture pattern estimation and proper internal fixation are important to achieve and improve reduction quality, and to ameliorate better long term results.

Objective To explore the efficacy of case analysis and problem discussion in teaching the course of introduction to clinical medicine for law majors and to discuss their influence on cultivating students' ability and quality.Methods Totally 58 students were randomly divided into three groups:trial group A(n =20),trial group B (n =16) and control group (n =22).Trial group A was further randomly divided into six groups.Teaching contents included iron deficiency anemia and acute leukemia.Trial group A and trial group B adpoted case analysis and problem discussion while control group practiced traditional classroom teaching.Results of theoretical test were processed through one-way analysis of variance and the least significant difference,using SPSS 11.5 software.Self-evaluation of teaching effects on students'specialized learning,logic thinking and knowledge of diseases were analyzed by Chi-square test and Fisher's exact test.Influences of different teaching methods on self learning ability,summarizing ability,team cooperation consciousness and lateral thinking were evaluated after lecture.Results Exam results showed no difference between trial group A and control group (P =0.564),the students in trial group A had a significant higher score than those in trial group B (P =0.004).100％ and 75.0％ students in trial group A considered the course of introduction to clinical medicine helpful concerning knowledge of diseases and students' specialized learning,higher than those of 77.3％ and 40.9％ in control group,with statistical differences(P =0.049,P =0.026).Positive evaluation rates of self learning ability,summarizing ability,team cooperation consciousness and lateral thinking were 100％,70.0％,80.0％,60.0％ in trial group A ;75.0％,68.8％,62.5％,81.3％ in trial group B;22.7％,36.4％,4.5％,27.3％ in control group.Except for summarizing ability,students in trial group A and B were significantly better than those in control group(P＜0.05).Conclusions The teaching method of case analysis and problem discussion meets the needs of versatile legal personnel training and it can stimulate students' study interest as well as improve their professional quality and ability.

Objective T o establish a gas chrom atography-m ass spectrom etry (G C-M S ) m ethod for the determ ination of sulfide ion in blood and apply it to the practical cases. Methods T he 1, 3, 5-tribro-m obenzene w as selected as an internal standard, and 0.2 m L blood sam ple w as collected and analyzed using G C-M S after α-B rom o-2, 3, 4, 5, 6-pentafluorobenzyl brom ide derivatization. Results T he m ass concentration of sulfide ion in blood had good linearity in the range of 0.2-40μg/m L w ith a lim it of detection (L O D ) of 0.05μg/m L . T he m ass concentration of sulfide ion w as less than 0.05μg/m L in blank blood from different sources such as healthy subjects and dead cases. In 3 sulfide poisoning cases, sul-fide ion w as detected in the blood sam ples of 6 victim s, and the m ass concentration range w as 1.02-3.13μg/m L . Conclusion T his study establishes a m ethod for investigation of sulfide ion in blood w hich has been applied successfully to the cases of fatal sulfide poisonings.

Objective T o analyse the m etabolic changes in urine of rats w ith brodifacoum intoxication, and to reveal the m olecular m echanism of brodifacoum-induced toxicity on rats. Methods B y establish-ing a brodifacoum poisoning rats m odel, the urine m etabolic profiling data of rats w ere acquired using high performance liquid chromatography-timeofflightmassspectrometry (HPLC-TOF-M S).The orthogo-nal partial least squares analysis-discrim ination analysis (O PLS-D A ) w as applied for the m ultivariate statistics and the discovery of differential m etabolites closely related to toxicity of brodifacoum . Results O PLS-D A score plot show ed that the urinary m etabolic at different tim e points before and after drug adm inistration had good sim ilarity w ithin tim e period and presented clustering phenom enon. C om paring the urine sam ples of rats before drug adm inistration w ith w hich after drug adm inistration, tw enty-tw o m etabolites related to brodifacoum-induced toxicity w ere selected. Conclusion T he toxic effect of brodi-facoum w orked by disturbing the m etabolic pathw ays in rats such as tricarboxylic cycle, glycolysis, sphin-golipid m etabolism and tryptophan m etabolism , and the toxicity of brodifacoum is characterized of accu-m ulation effect. The m etabonom ic m ethod based on urine H PLC-TO F-M S can provide a novel insight into the study on m olecular m echanism of brodifacoum-induced toxicity.

Objective To determine the chlorpyrifos in human blood by liquid chromatography-tandemmass spectrometry and to validate its application in poisoning cases. Methods The samples were extracted by a simple one-step protein precipitation procedure. Chromatography was performed on a Capcell Pack C18 mG II column (250 mm×2.0 mm, 5μm) using an isocratic elution of solvent A (0.1% formic acid-water with 2 mmol/L ammoniumacetate) and solvent B (methanol with 2 mmol/L ammoniumacetate) at 5∶95 (V∶V).Results The linearranged from5 to 500ng/mL (r=0.9987).Thelimitofdetection (LOD) and the lower limit of quantification (LLOQ ) were 2 ng/mL and 4 ng/mL , respectively. For this method, the precision and accuracy of intra-day and inter-day were <10% and 97.44%-101.10%, respectively. The re-sults in stability test of long-termfrozen were satisfied. The matrix effect, recovery and process efficien-cy were 64.97%-86.81%, 76.70%-85.52%, and 55.57%-66.58%, respectively. Conclusion This method can provide a rapid approach to chlorpyrifos extraction and determination in toxicological analysis of forensic and clinical treatment.

Objective To establish the m ethod to analyze γ-hydroxybutyric acid (GHB ) and its precursors 1,4-butanediol (1,4-B D ) and gam m a-butyrolactone (GBL) in urine through LC-M S/M S and provide evi-dence for related cases. Methods GHB-d6 and M O R-d3 were used as the internal standard. The urine sam ple w as separated by LC after protein precipitation w ith m ethanol. The electrospray ion source w as for ionization. E ach com pound w as detected through m ultiple-reaction m onitoring (M R M ) m ode. Results The lim its of detection of GHB and its precursors 1,4-B D and GBLwere 0.1, 0.1 and 2μg/m L. The accuracy w as 87.6% -98.1% . The intra-day and inter-day precisions were less than 15% and m atrix ef-fects were higher than 80% . Conclusion The m ethod is high sensitive, sim ple, rapid, specific and w ith high reliability. This study has provided technical support and basic data for forensic cases involving GHB .

OBJECTIVE:To study the effect of ethanol on the pharmacokinetics of phenytoin sodium in rabbits METHODS:The serum concentrations of phenytoin sodium at different points of time were determined by UV-spectrophotometry in eight rabbits after administration of phenytoin sodium(10mg/kg)alone and in combination with ethanol RESULTS:After administration in combination with ethanol,the AUC of phenytoin sodium was significantly decreased from(4 108 64?1 039 98)mg/(min L) to (1 903 65?1 003 40)mg/(min L),Cmax from(29 0?2 94)mg/L to(16 0?5 9)mg/L,T1/2(ke) from(98 45?26 4)min to(82 84?25 5)min;but the apparent distribution volume(Vd)was obviously increased from(0 3 475?0 0 360)L/kg to(0 6 819?0 1 901)L/kg and the clearance rate(CL) from(0 0 026?0 0 008)ml/(kg?min)to(0 0 062?0 0 022)ml/(kg?min) CONCLUSION:The elimination of phenytoin sodium was significantly accelerated after simultaneous administration of ethanol in rabbits

Objective To clarify the role of syk kinase in inflammasome activation in mouse peritoneal macrophages during Listeria monocytogenes (LM) infection. Methods Murine peritoneal macrophages were randomly divided into BAY treatment group, SB treatment group, WO treatment group, no treatment group and negative control group (NI). There were three wells in each group. The syk inhibitor BAY 117082, P38MAPK inhibitor SB203580 and PI3K inhibitor wotamine were used to treat murine peritoneal macrophages for 1h in BAY treatment group, SB treatment group and WO treatment group. Murine peritoneal macrophages were infected with LM for 24 h except NI group. The protein level of interleukin (IL)-18 in the supernatant was detected by ELISA kit. The activation condition of key molecule ASC in the infected-macrophages cyto-plasm was observed under fluorescence microscope. The phosphorylation levels of syk protein kinase at different time points during LM infection were determined by Western blot assay. Results There was no significant difference in IL-18 protein level before and after BAY treatment in NI group (P>0.05). The IL-18 protein level was significantly lower after LM infec-tion in BAY treatment group compared with that in no treatment group (P<0.05). In contrast, there was no significant differ-ence in IL-18 production between SB treatment group, WO treatment and no treatment group (P>0.05). Meanwhile, the per-centage of ASC-speck positive cells was obviously diminished in BAY treatment group compared with that in no treatment group (P<0.01). The phosphorylation levels of syk were significantly increased in 5 min, 15 min and 30 min post-infection. Conclusion Syk kinase signaling is involved in the inflammasomes activation upon Listeria monocytogenes infection in mu-rine macrophages.

OBJECTIVE: The possibility for the identification of GHB administration through hair analysis was investigated to provide method and information for toxicology examination of GHB. METHODS A GC/MS assay for GHB in hair was developed. Endogenous levels of GHB in hair, time course of GHB in hair, relationship between GHB levels in hair and hair color or administration dose were also established by guinea pig model. RESULTS: Endogenous levels of GHB in guinea pig black hair and human black hair were (3.01 +/- 1.41) ng/mg (n=28) and (1.02 +/- 0.27) ng/mg (n=20), respectively. GHB levels in black hair were increased by GHB administration and related with drug dosage, and also much higher than in brown and white hair. CONCLUSION Analysis of GHB in hair is suitable for investigation of GHB abuse in forensic toxicology and GHB level in segmental analysis compared with endogenous level of GHB may provide useful information about GHB administration.
Animals ; Dose-Response Relationship, Drug ; Forensic Toxicology/methods* ; Gas Chromatography-Mass Spectrometry/methods* ; Guinea Pigs ; Hair/chemistry* ; Hair Color ; Humans ; Hydroxybutyrates/analysis* ; Male ; Substance Abuse Detection/methods* ; Time Factors

Objectives: To prove the environmental etiological hypothesis of personality disorder and to evaluate the relative risk(RR) of family environmental risk factors for personality disorder. Methods: By means of cohort study, about 9200 senior high school students and their parents had been followed-up for three years by Personality Disorder Questionnaire-fourth edition (PDQ-4), Parental Rearing Questionnaire (Egma Minnen av Bardndosnauppfor-stran, EMBU), General Information Questionnaire, and International Personality Disorder Examination (IPDE) to diagnose PD according to the criteria of ICD-10 and DSM-IV. The univariate and multivariate analysis methods were applied for data processing. Results: The incidence rate of personality dysfunction and personality disorders were 4. 0％ and 1. 1％, respectively. Univariate analysis indicated that the incidence of personality dysfunction had significant statistical association with male, the parental rejection and over-protection, with the Relative Risks being 0. 64, 2. 60 and 2. 31, respectively. Univariate analysis indicated that the incidence of PD had significant statistical association with the parental rejection and over-protection, with the RR being 2. 45 and 2. 80, respectively. Conclusion: The family environmental risk factors are significantly associated with personality disorders.