Objective To develop a questionnaire which measures leisure satisfaction for university students. Methods Initial items of the questionnaire were compiled according to theoretical analysis and interviews. 400 college students were recruited to respond to the items. The explorative factor analysis was used to decide the final items and dimensions. Another 350 college students were recruited to respond to the decided questionnaire and a criterion questionnaire. Results The leisure satisfaction questionnaire consisted of three dimensions : Relaxing Satisfaction (RS) , Contacting Satisfaction (CS), and Transcend Satisfaction (TS). Internal consistency (Cronbach' sα) of the three dimensions were 0.86,085 and 0. 84 and the Cuttmann Split-half Coefficient were 0.76,0.83 and 0.86. The cumulative explanation of the variance was 58.956%. A confirmative factor analysis revealed that the three-dimension model was proper(x2/df = 1. 74, NFI = 0.88, NNFI = 0.93, CFI = 0.94, GFI =0.93,AGFI=0.91,IFI=0.94,RMSEA =0.048). The leisure satisfaction Questionnaire was positively related to freedom satisfaction( r = 0.20 ～ 0. 30, P < 0.01). Conclusion The leisure satisfaction questionnaire for university students has satisfactory psychometric characteristics.

[Objective]To evaluate the early-middle stage clinical results of cervical disc hemiation treatment with the Bryan cervical disc prosthesis.[Method]There were 51 patients with cervical disc herniation.There were 16 female and 35 male patients aged between 31 and 57(mean age 43).The herniated disc was located at C3、4 in 8 cases,C4、5 in 4 cases,C5、6 in 31 cases,C6、7 in 2 cases,C4～6 in 2 cases,C3～6 in 2 cases.and C5～7in 2 case.There were 16 patients with myelopathy and 31 with radiculopathy.A total of 57 sets of Bryan cervical disc prosthesis were implanted,with single level disc replaced in 45 cases and bi-level in 6 cases.The Bryan cervical disc prosthesis contained a proprietary,low-fiction,wear-resistant,unique polyurethane nucleus.The nucleus was located in shaped titanium plates(shells) that include convex porous ingrowth surfaces,to allow bony fixation to the adjacent vertebral endplates.The level of stableness and mobility at the implanting location were observed on dynamic radiograph postoperatively.[Result]The average follow-up was 1 year to 4 and half year.There was no prosthesis displacement and loosening in all cases.One patient had a definite spontaneous fusion of treated segment after 4 years of follow-up.Two patient had grade Ⅱ heterotopic ossification(HO).The range of motion(ROM) at implant level was 9.3 degrees on the flexion-extension radiographs.Significant improvement in neurological symptoms were observed in all cases,and radicular pain for patients suffering from raduculopathy was relieved completely.The average improvement was 8.5 points based on CSM criteria.Effective rate was 100%.[Conclusion]Artificial cervical discs prosthesis provides a new effective treatment for cervical disc herniation.Definite stabilization and satisfactory mobility were achieved after the implantation of cervical disc prosthesis.

Objective To study the antitumor activities of extract from Ligia exotica(Roux).Methods The dried powder of total Ligia exotica(Roux) was extracted by 37 ℃ water.The solution was concentrated in vacuum,and then was freeze-dried to afford crude extract.The inhibitory effect of the extract on tumor cells proliferation was assayed by MTT method,and transplant tumor model of sarcoma 180(S180) was used.Results The extract from Ligia exotica displayed obvious proliferation inhibitory effect on HeLa,7901,NCI cells,and no growth inhibitory effect on 929 cells in vitro.After administration at the doses of 0.25,0.50,1.00 g?kg-1,ip,for 7d in tumor-bearing mice with S180,The extract caused 26.9 %,45.3 %,64.6 % inhibition rates,respectively.Conclusion The extract from Ligia exotica showed significant antitumor activity.

Objective To know the distribution of pathogenic bacteria in the hospital ,and to provide scientific evidence for con‐trolling hospital infection and clinical medication .Methods Samples of the hospitalized patients and the data of bacteria culture and isolation in the hospital were collected and statistically analysed retrospectively from January 2011 to December 2013 .Bacterial iden‐tification and drug sensitivity test were carried out by using VITEK 2 Compact automated bacterial identification and drug sensitive system .The clinical distribution and drug resistance characteristics of the strains were analyzed by using WHONET5 .4 and SPSS17 .0 software .Results In the hospital ,71 929 specimens were received from 2011 to 2013 totally ,the detection rate of patho‐genic bacteria was 18 .5% .Sputum(62 .8% ) ,secretions and pus(11 .3% ) ,blood(10 .3% ) were the top three types of specimens which had larger positive numbers .Gram negative bacteria are the main kind of pathogenic bacteria in the hospital ,accounting for 73 .3% .Gram positive bacteria accounted for 25 .0% .E .coli(21 .1% ) ,Pseudomonas aeruginosa(14 .8% ) ,Acinetobacter baumannii (12 .5% ) ,Klebsiella pneumoniae (12 .2% ) and Staphylococcus aureus(11 .04% ) were the top five pathogenic bacteria .The drug resistance of the isolates were as follows .Gram‐negative bacteria showed resistance of different extents to broad‐spectrum penicil‐lins ,quinolones ,cephalosporins except for the 4th generationsand and aminoglycosides .Over 80% Staphylococcus aureus showed re‐sistance to penicillin ,erythromycin and clindamycin ,but the rate to Oxacillin were decreasing year by year .Enterobacteria were still most sensitive to carbapenems with a sensitive rate over 98 .6% .However ,the emergence of Carbapenem‐resistent enterobacteria from 2011 to 2013 was worthy of clinical attention .Conclusion The type of positive specimens were mainly sputum .Gram negative bacteria are the main pathogenic bacteria ,and have obvious multi-drug resistance .E .Coli is the superiority strains ,fungal infection rate are increasing year by year .Doctors and hospital infection controlling department should pay attention to the monitoring of bac‐terial resistance and improve the rational use of antimicrobial drugs .

Objective To study the indications and clinical outcome of the upper cervical spine via the high anterior cervical retropharyngeal approach in treatment of upper cervical spine injuries. Methods There were 41 patients including 32 males and 9 females, at age of 12-67 years. Of all patients, there were 21 patients with Hangman fractures, two with fracture of C2 vertebral body, 12 with irreducible atlantoaxial dislocation secondary to os odontoideum, four with C1,2 tuberculosis and two with C2 gaint cell tumor. All patients underwent the high anterior cervical retropharyngeal approach to expose C1C3. C2,3 fusion followed by self-locking plate was performed for Hangman fractures and C2 fractures. Ventral reduction plud posterior aflantoaxial fusion was done for irreducible atlantoaxial dislocation secondary to os odontoideum. Lesion was cleared for tuberculosis and the tumor was resected and reconstructed. The neurological funcation was evaluated according to the ASIA criteria, the JOA score and Odom' s criteria. Results Successful exposure of arch of atlas to C3 was achived in all 41 patients, with satisfactory reducation, decompression, fusion, lesion resection and reconstruction. The trauma patients with normal neurological function showed no neurological deficit postoperatively, but those with quadriparesis had partial recovery. While the patients with illness obtained marked recovery of neurological function, with the JOA score from preoperative 8.9 to 12.5 at final follow-up. The clinical success rate (excellent/good/fair) reached 94. % according to Odom' s Criteria. Hypoglossal symptom was found in three patients and facial nerve symptom in two, without wound infection. Conclusions Via the high anterior cervical retropharyngeal approach, the upper cervical spine can be thoroughly exposed to facilitate reduction, decompression and reconstruction and maximally restore physiological function of the cervical spine in treatment of the upper cervical spine injuries.

Objective To explore feasibility and therapeutic effect of posterior decompression by vertebral body resection, interbody bone fusion and transpedicular screw internal fixation in treatment of severe rotational throracolumar fracture and dislocation. Methods From October 2007 to July 2008, nine patients with severe rotational throracolumar fracture and dislocation classified as AO C types under-went decompression by vertebral boby resection, intervertebral bone fusion and transpedicular screw inter-nal fixation via a posterior midline small incision. There were eight males and one female, at age range from 23 to 54 years. All patients involved levels at T_(11)-L_2. According to AO classification, there were three patients with type C1 bursting fractures with rotational dislocation, five with distraction fracture com-bined with rotational dislocation and one with rotational distraction shear fracture/dislocation. The preop-erative Frankel Grading was Grade A in three patients, Grade B in one, Grade C in four and Grade D in one. Postoperative neurological status, the correction and loss of dislocation and the location and union of bone graft were reviewed. Results All patients received successful operation, with operation time of 3.5-5.8 hours (mean 4.4 hours), blood loss of 1 200-3 500 ml (mean 1 800 ml). The follow- up period in nine patients was 3-12 months (mean seven months). Postoperative X-ray photographs showed that the dislocation in all patients was reduced, the spine curvature was recovered to normal and the intervertebral bone graft was well fixed. Three patients at Frankel Grade A had no improvement, one at Grade B was improved to Grade C. Of four patients at Grade C, three patients were improved to Grade D. The follow-up showed bony fusion in all patients, with no loosening, dislocation or breakage of the internal fixation or implants. Conclusions For severe rotational throracolumar fracture and dislocation, decompression, reduction, fusion and fixation are rather difficult, while sufficient posterior decompression by vertebral body resection, rigid interbody bone fusion and transpadicular screw internal fixation can be an effective alternative measure.

Objective To evaluate the clinical outcome of artificial cervical disc replacement and cage fusion in the treatment of multi-segmental cervical disc herniation. Methods A total of 39 patients with multi-level cervical disc herniation were treated with disc replacement and adjacent segment cage fusion at one stage. There were 29 patients with two level cervical disc herniation, nine with three level cervical disc herniation and one with four level cervical disc herniation. Of the patients, there were 17 male and 22 female, aged between 35 and 63 years ( mean age 47 years). The herniated disc was located at C3-4 and C4-5 in two patients, C4-5 and C5-6 in 15, C5-6 and C6-7 in nine, C4-5 and C6-7 in three, C3-4,C4-5 and C5-6 in four, C4-5, C5-6 and C6-7 in five and C3-4, C4-8 , C5-6 and C6-7 in one. There were 18 patients with myelopathy and 21 with radieulopathy. The stabilization and the range of motion of implanted disc,the fusion of cage and the displacement of cage were observed on dynamic radiograph postoperatively. The clinical symptom and the neurological function were evaluated according to JOA score and odom' s criteria. Postoperative clinical symptoms and daily function were evaluated by using neck disability index (NDI) scale. Results Twenty-nine patients with bi-level cervical disc herniation underwent single level disc replacement and cage fusion on adjacent segment. Nine patients with three level disc herniation underwent single level disc replacement in seven and level cage fusion on adjacent segment in two. Twopatients underwent two level disc replacement and one level cage fusion. One patient with four level disc herniation was treated with two level disc replacement and two level cage fusion. The patients were followed up for from 6 moths to 3 years, which showed that definite stabilization was achieved for all disc with average range of motion for 9.3 degrees postoperatively. Solid fusion was achieved in all cage, with no subsidence or displacement of cage. The JOA score was increased from 9.1 to 13.2 at final follow up and the NDI (neck disability index) score decreased from 41.8 reduced to 29.5 at final follow up. The clinical success rate (excellent/good/fair) according to Odom' s Criteria was 85%. Conclusion Cervical disc replacement and cage fusion can attain definite stabilization and satisfactory mobility and provide a new effective treatment for cervical disc herniation. The long-term outcome needs further clinical followup.

Objective To compare the clinical curative effect of pedicle screw reduction and fix-ation via or not the injured vertebra in treatment of thoracolumbar fractures. Methods A retrospective study was performed on 27 patients with single thoracolumbar fractures admitted from March 2006 to Feb-ruary 2008. There were 12 patients treated with pedicle screw fixation (Group A) and 15 with traditional two-level fixation (Group B). Group A involved 11 males and 5 females, aged average 43 years (25-56 years); Group B included 10 males and 5 females, aged from 23 to 61 years (mean 42 years). All pa-tients had fresh fractures with intact pedicles on either unilateral or bilateral sides. With body position re-duction under anesthesia, the patients in Group B were treated with posterior routine distraction and lordo-sis restoration, while those in Group A were treated with the methods used in Group B as well as pedicle screw reduction and fixation. The kyphosis (Cobb angle) and recovery of injured vertebral height were observed. Results The mean follow-up period was 9 months (6-22 months). After operation, the op-timal Cobb angle and anterior column restoration were achieved through the ventral reduction from the in-jured vertebral body. The degree in anterior movement of injured vertebrae pre- and post-operatively was (0.089±0.036)° in Group A and (0.023±0.048)° in Group B, with statistical difference (P < 0.01). Cobb angle was (9.88±7.69)° in Group A and (5.19±3.24)° in Group B (P < 0.05). Changes of distance between the anterior- upper edge of the cephalad vertebrae to the anterior - lower edge of the caudal vertebral body was (39.3±5.2) % in Group A and (20.6±6.5)% in Group B (P < 0.05). Over distraction of the contiguous discs was also avoided efficiently. Conclusions Selective pedicle screw fixation into the injured vertebrae can help correct the kyphosis and maintain the reduction and en-hance the stiffness of the posterior short-segment instrumentation in single thoracolumbar fractures.

Objective To evaluate the feasibility and safety of percutaneous posterior pedicle screw fixation in treatment of traumatic thoracolumbar fracture without neurologie deficits. Methods From January 2007 through December 2007, there were 15 patients with traumatic fracture of the thoracic or lumbar spine without neurologie deficits treated within 10 days after injury. There were 10 males and 5 females at age range of 31-65 years (average 45.6 years). The fracture was located at T11 in 1, T12 in 4,L1 in 7, L2 in 2 and L3 in 1. Preoperative anteroposterior and lateral radiographs of the fractured spine as well as CT and MRI were done to evaluate injury severity of the vertebral body, spinal canal and diseolig-amentary structures. According to Magerl classification criteria, there were 10 patients with type A3 frac-ture, 3 with type A2 fracture and 2 with type A1 fracture, which were treated with pereutaneous posterior pediele screw fixation. Operative time and intraoperative blood loss were recorded to observe clinical re-suits. Results The average operation time was 82 minutes (65-110 minutes), with a mean intraopera-five blood loss of 35 ml (20-50 ml ). There were no conversions to open surgery, new neurological deficits or other surgery-related complications. All patients were followed up for 3-11 months (average 7.6 months), which showed that Cobb angle was corrected from preoperative (15.7±6.3)° to postoperative (3.5±1.2)°. Postoperative CT showed sound reduction of posterior bone displacement in all patients compared to preoperative CT results. Conclusions Percutaneous posterior pedicle screw fixation is fea-sible and safe surgical procedure with fine short-term outcome in treating traumatic thoracolumbar fracture without neurologic deficits. This technique offers serveral potential advantages over open approaches inclu-ding less tissue trauma and blood loss as well as quicker recovery.

AIM: To elucidate the relationship of inflammation, coagulation and cholesterol gallstone formation. METHODS: Hamsters were divided into four groups: control group (feeding normal diet), lithogenic diet (LD) 2 weeks group, LD 6 weeks group and LD+aspirin 6 weeks group. Gallstone incidence, antithrombin antigen (AT-Ⅲ:Ag), antithrombin activity (AT-Ⅲ:Ac), thrombin (F-Ⅱa:Ac), plasminogen activator inhibitor activity (PAI:Ac), plasmin activity (Plm:Ac), D-dimer:Ag and C-reactive protein (CRP) in gallbladder bile were observed as read-out parameters. RESULTS: The incidence of gallstones in control group, LD 2 weeks group, LD 6 weeks group and LD+aspirin group were 0%, 20%, 73% and 25%, respectively. AT-Ⅲ:Ag, F-Ⅱa:Ac, D-dimer and CRP in LD 2 weeks group and LD 6 weeks group were significantly higher than those in the control group (P