BACKGROUND:The incidence of posterior cruciate ligament injury combined with other knee ligament injuries is relatively high, but studies on the internal dynamic stress change of these ligaments are stil rare. OBJECTIVE:To simulate three-dimensional finite element model of the normal human knee and the complete posterior cruciate ligament rupture (III injury), calculate and analyze the stress distribution and changes of the medial collateral ligament, the lateral collateral ligament and the anterior cruciate ligament in the normal knee model and the complete posterior cruciate ligament rupture model. METHODS:We collected CT and MRI images of the healthy male right knee, and established three-dimensional finite element model of the normal human knee by using E-feature Biomedical Modeler, and ANSYS software. The simulation of a flexion moment at 0°, 30°, 60°, varus/valgus and internal/external rotation torque was applied on the established three-dimensional finite element model of the normal knee. The stress of posterior cruciate ligament, lateral collateral ligament, anterior cruciate ligament and medial col ateral ligament was analyzed. During simulation of complete posterior cruciate ligament rupture, the stress of lateral coll ateral ligament, anterior cruciate ligament and medial col ateral ligament was analyzed. RESULTS AND CONCLUSION:Three-dimensional finite element biomechanical analysis data revealed that after posterior cruciate ligament rupture, the stress of lateral coll ateral ligament during inversion and external rotation of the knee joint obviously increased, but the stress of anterior cruciate ligament and medial collateral ligament slightly altered. These findings suggested that posterior cruciate ligament rupture may cause secondary injury to other ligaments of the knee joint, and further support the importance of the dynamic stability of the knee joint.

Objective To investigate?the?distribution?and?antibiotic?resistance?profile?of?clinical?isolates?in?2015?for?improving?antimicrobial treatment in Chuzhou First Hospital. Methods Bacterial identification and antimicrobial susceptibility testing were?performed?with?MicroScan?WalkAway?96?PLUS?bacterial?identification?system.?All?the?data?were?analyzed?by?WHONET5.6?software. Results A total of 1499 clinical isolates were collected during 2015, of which gram positive organisms and gram negative organisms accounted for 24.7% and 75.3%, respectively. Prevalence of MRSA among S. aureus was 37.0% and MRCNS among CNS 86.3%. All (100%) Staphylococcus and E. faecalis isolates were susceptible to vancomycin, daptomycin and linezolid. About 2.8% of the E. faecium isolates were resistant to vancomycin. All the Streptococcus pneumoniae isolates were penicillin-susceptible, mainly isolated from children. The prevalence of extended-spectrum beta-lactamases (ESBLs) positive strains was 52.9% in E. coli, 30.8% in Klebsiella spp. (K. pneumoniae and K. oxytoca) and 25.0% in P. mirabilis. The ESBLs-positive strains showed higher resistance rate than ESBLs-negative strains to most antibiotics. The percentage of the P. aeruginosa isolates resistant to meropenem and imipenem was all 29.4%. The percentage of the Acinetobacter spp. (A. baumannii accounted for 85.5%) strains resistant to imipenem and meropenem was 63.0% and 64.5%, respectively. Conclusions Antibiotic resistance is still serious in Chuzhou First Hospital in 2015, especially the emerging carbapenem-resistant Enterobacteriaceae, which is of great concern.

Objective To observe the clinical efficacy of XIE’s Wen Du Qu Mai (Warming the Governor Vessel to expel smog) needling method plus heat-sensitive moxibustion in treating chronic simple rhinitis due to yang deficiency. Method Eighty patients with chronic simple rhinitis due to yang deficiency were randomized into a treatment group and a control group, 40 in each group. The treatment group was intervened by acupuncture plus heat-sensitive moxibustion, while the control group was by medication. The symptom and sign score was observed before and after 1-week treatment, and the clinical efficacy was compared. Result The total effective rate was 85.0%in the treatment group versus 55.0% in the control group, and the difference was statistically significant (P<0.05). The symptom and sign scores were changed significantly after treatment in both groups (P<0.01,P<0.05). After treatment, the symptom and sign score in the treatment group was significantly different from that in the control group (P<0.05). Conclusion XIE’s Wen Du Qu Mai needling method is effective in treating chronic simple rhinitis due to yang deficiency.

Objective To investigate the expression and significance of fragile histidine triad(FHIT) gene in the cholangiocarcinoma cell line QBC939.Methods The eukaryotic expression vector was transfected into QBC939,real-time RT-PCR was used to detect the change of FHIT expression,and direct counting method under microscope was used to detect the change in the biological behavior of cells.Results After transfection,the expression of FHIT mRNA increased by 2.53-fold,but the cell clones were significantly less [(11.2?1.3) vs.(10.5?1.1) vs.(6.3?1.0),P

Objective To investigate clinically applied value of P300 with influential factors in olivopontocerebellar atrophy (OPCA). Methods The P300 and cognitive ability sifting investigation (CASI) were tested in 34 OPCA cases and normal controls with equal age, gender and educational levels. Results The P300 latency was significantly longer in OPCA group of different ages than that in the normal control group (P

Objective:To investigate the recent and forward effects of different operation patterns on recurrent calculus of intrahepatic duct.Methods:A analysis was made on previous history and operation patterns,distribution,effect and follow-up visit in 76 reoperation patients with recrudescent hepatolith between Jan,2000 and Feb,2008 in Affiliated Provincial Hospital of Anhui Medical University,retrospectively.The situation after operation was confirmed as the short-term curative effects and the follow-up results as long-term curative effects.Results:The average hospital stay was 10.4 days and the incidence rate of postoperative complications was 14.5%.The follow-up which lasted from 8 months to 8 years showed that the average recurernce rate was 38.2%.Besides,the rate of joint-type operation was lower than single-type operation (P

Objective To explore the value of the joint space in the prediction and evaluation of cervical vertigo(CV).Methods 45 CV patients were selected in our hospital from May 2011 to March 2015 as the observation group,and 45 healthy people in our hospital were selected as control group in the same period.The differences of atlas axis joint space including the atlantodental interval(ADI),LADI and VBLADI between the two groups were measured by three dimensional CT,evaluated the difference of indexes of joint space,CV symptom and function score of patients in observation group before treatment and 3 weeks after treatment were observed by CV symptom and function assess-ment scale,and analyzed theirs correlation.Results The differences of ADI and VBLADI between the two groups were statistically significant(t =3.430,87.753,all P <0.05 ).The vertigo,neck pain,headache,daily life and psychological of work and social adaptive capacity scores,ADI and VBLADI levels in the observation group were significantly decreased after treatment(t =67.236,31.795,25.198,18.494,19.180,98.194,10.972,75.895,all P <0.05).Correlation analysis showed that the ADI,VBLADI and the indexes scores of CV symptoms and function were positively correlated(r =0.456,0.829,0.578,0.456,0.378,all P <0.05;r =0.512,0.398,0.782,0.412, 0.477,0.891,all P <0.05).Conclusion Axial joint disease is an important factor in the pathogenesis of CV,and there is a significant correlation between the axial joint space and CV,which can be used as a predictive index for the assessment and treatment of patients with CV.

Objective To investigate the specific expression of nucleolin in the development of cap-stage tooth germ of mouse embryo,and detect the possible biological function of nucleolin. Methods In situ hybridization and immunohistochemistry were performed to detect the expression of nucleolin mRNA and protein in the development of tooth germ at embryo day 15(E15).Double staining for apoptotic cells and nucleolin was employed to explore the relationship between nucleoin and apoptosis in tooth germ. Results The expression of nucleolin mRNA and protein was mainly detected in the cervical loop,inner epithelium and the underlying dental papilla.Moreover,nucleolin protein was also located in the primary enamel knot and basement membrane.It was revealed by double staining that the fluorescence images of nucleolin and the location of apoptotic cells were not overlapped. Conclusion The expression pattern of nucleolin mRNA do not completely coincide with that of nucleolin protein at the cap stage of tooth germ.The location for nucleolin protein in the basement membrane suggests that nucleolin may be involved in the reciprocal interactions between the inner epithelium and dental papilla mesenchyme,subsequently affect the morphogenesis of tooth germ.

Objective To improve the efficiency of donated organs and to investigate the possi- bility and operation protocol of heart and lung transplantation from the same donor to different reci- pients.Methods The organs of heart and lung were obtained from three donors through the method of orthotopic lavage and whole cutting,and transplanted to end-stage patients with heart diseases or lung diseases.First,the donor was subjected to mechanical ventilation,thoracotomy and lavage of heart and lung.The heart and lung were cut in whole and separated.The recipients were subjected the re- trograde lavage of heart and lung.In the patients receiving unilateral lung transcription,the left and right lungs were isolated.Among 3 recipients of lung transcription,one underwent left unilateral lung transplantation and 2 bilateral lung transplantation.Three cases received orthotopic cardiac transplan- tation by using bicaval orthotopic heart transplantation (BOHT) anastomosis method.Results One recipient of left unilateral lung transplantation recovered well after operation.In one recipient under- going bilateral lung transplantation,right upper lung embolism occurred.After re-operation of cutting the right upper lung on the 9th day of the first one,he recovered from the illness.In another recipient receiving bilateral lung transplantation,anastomotic stenosis of trathea and pulmonary infection occurred after operation.After expectant treatment,he recovered from the illness,but died from serious infection 7 months after operation.One of the heart recipients was found having renal failure of first stage,and recovered from disease after hemodialysis treatment.Quality of life was good in all 3 heart recipients after operation and their heart function achieved the restoration of 0-Ⅰstage.Conclusion The treatment protocol of transplantation from the same donor to different recipients at the same time, which can make full use of the organs from donors,is feasible and has good effect.

Objective To explore the optimal method of qualitative and quantitative assessment of retinal neovascularization(RNV),choroidal neovascularization(CNV) and leakage from CNV. Methods Thirteen mice were randomly divided into RNV assessment group(n=7)and CNV assessment group(n=6).For RNV assessment, 3 mice were served as normal controls,and the other 4 were made into models of retinopathy of prematurity(ROP).At postnatal d16,mice in normal control group and 3 ROP model mice received intraocular injection with FITC labeled or unlabeled antibody and were sacrificed 12 h later.The retinas were flat mounted(FITC labeled antibody) or incubated with secondary antibody(unlabeled antibody) and then flat mounted.The other ROP model mouse was served as blank control.For assessment of CNV and leakage from CNV,6 mice(12 eyes) were induced into models of CNV,and were randomly divided into two groups.Seven and 14d after model establishment,mice were intraocularly injected with unlabeled antibody,and fluorescein sodium were intraperitoneally injected 12 h later.The area of CNV and that of CNV leakage were calculated. ResultsRetinas from eyes injected with FITC labeled antibody exhibited good resolution of ultrastructure of RNV,while retinas from eyes injected with unlabeled antibody showed selective staining of RNV with no background,greatly facilitating identification and quantification of RNV.Merging images of stained CNV with images of fluorescein sodium leakage from CNV revealed double labeled CNV surrounded by fluorescein that had leaked into surrounding tissues.The mean area of CNV and its leakage of d14 were significantly different from those of d 7(P