Objective To conduct a hiomechanical comparison of the four common internal fixation methods for the anterior eruciate ligament(ACL)avulsion fractures of displaced tibial eminence.Methods Sixteen fresh cadaver knee joints were used and randomized into four equal groups of four fixation methods:antegrade wiring group, retrograde wiring group,suturation group,and intramedullary screw group.The knee joint specimens were fixed at flexion of 30?and subject to continuous stretch stresses of 30 N,60 N and 90 N respectively on a material testing machine(MTS 858 Bionix test system,USA)which conducted a simulated Lachman test.The specimens were scanned at different angles by a three dimensional laser scanner.Data were recorded and processed by image software to es- tablish three-dimensional structure models of femur,tibia and knee joint.The test results were analyzed statistically on a computer.Results There were no obvious differences between each fixation group in the length change of ACL when the stresses were 30 N and 60 N(P＞0.05).Under 90 N stress,however,the mean length change between the femoral and tibial attachments of ACL was the smallest(4.8?1.7)mm(2.5 to 6.2 mm)in the suturation group(P＜0.05). There were no distinct differences between the intramedullary screw group and the retrograde wiring group in the changes of A CL shift(P=0.214).The average front shift in the retrograde wiring group was(6.2?1.2)mm(4.8 to 8.2 mm) and significantly smaller than that in the antegrade wiring group(P＜0.05).The antegrade wiring group made the largest average front shift under different stresses and its average front shift was(7.2?1.3)mm(5.6 to 8.7 mm). Conclusions The knee joint stability provided by the suturation fixation is distinctly better than that by the other three fixation methods.The antegrade wire fixation provides the poorest knee joint stability.There is hardly any difference between intramedullary screw fixation and retrograde wiring fixation.

Biomedical Research ; Child ; Humans ; Methyl-CpG-Binding Protein 2 ; metabolism ; Rett Syndrome

Aged ; Angioplasty, Balloon, Coronary ; Heparin ; adverse effects ; Humans ; Male ; Thrombocytopenia ; chemically induced

Objective To evaluate the clinical safety and efficacy of HIFU treatment of hepatic metastases from colorectal cancer.Methods 20 tumor lesions in 14 patients with hepatic metastases from colonectal cancer were treated with HIFU therapy.The vital signs,main organs'functions,examination of MRI and complications were observed.Results Vital signs of all the 14 patients were stable.The function of liver and kidney were normal and life quality were improved with elevation of Karnofsky in 5 patients.On MRI examination,the MRI signals of treating area of 20 tumor lesion in 14 patients decreased remarkably with disappearance of blood supply and a thin layer of edematous intensified zone was detected on the margin of lesion.6 patients were found to have cord-like burning scar on skin.Conclusion HIFU treatment is safe and effective in treatment of hepatic metastases from colorectal cancer.

AIM: To detect surface electromyogram (EMG) signal accurately.METHODS: How to reduce noise in the detection of surface EMG signal was discussed. It has been explored to design an electrode unit by using methods of differential amplification, active electrode, filter and so on , andto investigate the electrode shape and the right placing method.RESULTS: The instrumentation amplifier AD620 was adopted to design a bipolar active electrode, which has been successfully used in the surface EMG detection.CONCLUSION: Experiments show that using active electrode can improve ratio of signal and noise, reduce noise and detect surface EMG signal effectively.

Objective To identify the typical imaging features of steatocystoma multiplex on mammography.Methods Mammographic findings in 9 patients with clinical and pathological diagnosis of steatocystoma multiplex were analyzed along with a review of the current literature.Results Four of the nine patients with steatocystoma multiplex had a positive family history.Nine patients showed multiple,round,thin-walled fatty,radiolucent nodules with well-defined margin.These nodules are located in the superficial layer of the axilla bilaterally.They are also seen on the skin of breast(7 cases),the anterior chest wall (4 cases) and the upper arm (3 cases).Conclusion Recognition of the characteristic mammographic features of Steatocystoma multiplex is important in the management of these patients.

OBJECTIVE:To study a simple method for the isolation and purification of thrombin-like enzyme (TLE) from the venom of Agkistrodon halys Pallas. METHODS:DEAE-Sephadex A-25 vs. Sephadex G-25 chromatography in the isolation and purification of TLE from the venom of Agkistrodon halys Pallas was analyzed. RESULTS:TLE was isolated from the venom of Agkistrodon halys Pallas. SDS-PAGE electrophoresis appeared as a strap with its molecular weight at about 35.5 kDa, meeting electrophoresis purity standard. Physical-chemical character assay showed that the TLE has hemostasia activity in vitro with its specific activity at about 12.57IU?mg-1, while the arginine esterase activity was about 137.65IU?mg-1 measured by BAEE method. PMSF and EDTA were used in the inhibition experiment on this enzyme, and the enzyme was proved to be serine protease other than metalloproteinase. CONCLUSION:The methods can be used for the isolation and purification of thrombin-like enzyme (TLE) from the venom of Agkistrodon halys Pallas.

Objective To investigate the effects of the silence of teratocarcinoma-derived growth factor-1 ( TDGF-1 ) gene on invasion of human pancreatic cancer cell. Methods Three small interfering RNA (siRNA) targeting for TDGF-1 genes (S1, S2, S3 ) were designed and established, then the gene with the best silencing effects was screened. Human pancreatic cancer cell line PANC1 were transfected by siRNA with different concentrations (3. 125, 6.25, 12.5 nmoL/L), the cells without transfection, and simply treated with liposomes were controls. The expressions of mRNA and protein of TDGF-1 were determined by real time PCR and Western blot assay, respectively. The anchorage-independent growth was examined by clon formation in soft agar, and invasion ability was evaluated by boyden chamber model. PANC1 cells with transfection for 48h were injected into the nude mice to evaluate the invasion ability in vivo. Results The expressions of TDGF-1 mRNA and protein of cells transfected by siRNA were decreased in a dose-and time-dependent manner, which were significantly lower than those in liposomes group. Number of colony formation and transmembrane cell were 19.8 ± 2.2 and 49.8 + 2.6 in the control group, and 5.6 + 1.2 and 8. 1 + 1.1 in the 12.5 nmol/L transfection group. The volumes of tumor 4 weeks after transplation in the control group, liposomes group and the 12.5 nmol/L transfection group were (2.228 ± 0.016 ) cm3, ( 2.186 ± 0.028 )cm3 and ( 0.728 ± 0.023 )cm3. Conclusions TDGF-1 gene silence could inhibit invasion ability of human pancreatic cancer cell PANC1.

Alimentary tract duplications are rare congenital anomalies that usually present in childhood and occasionally in adults. They are most common in the ileum, but can occur anywhere along the alimentary tract from the mouth to the anus. We report a 24-year-old woman who presented with a giant chylous ileum cyst duplication. To our knowledge, there is only one other report of a patient with a giant chylous cyst in the literature.
Abdominal Pain ; Adult ; Cysts ; diagnosis ; pathology ; surgery ; Female ; Humans ; Ileum ; surgery ; Magnetic Resonance Imaging ; Tomography, X-Ray Computed

Objective To analyze the concentration of epithelial cell derived neutrophil-activating protein 78(CXCL-5) in the sy-(novial) fluid(SF) and peripheral blood in children with rheumatoid arthritis(RA) and evaluate its clinical relevance to the disease development.Methods SF and peripheral sera were taken from 26 children with RA and 16 healthy controls,and CXCL-5 was measured by enzyme linked immunosorbent assay(ELISA).CXCL-5 in SF was also measured in RA children after receiving steroid treatment.Results The levels of CXCL-5 was significantly higher than that in the SF of RA children compared with healthy controls(P0.05).Interestingly,CXCL-5 markedly decreased in RA children after steroid treatment(P