Objective To explore the clinical method and effect of ultrasonic osteotomy in mandibular angle reduction.Methods Under intronasal approach and general anesthesia,30 patients (5 male patients and 25 female patients) underwent intraoral prominent mandibular angle reductions with ultrasonic osteotomy.The jaw bone under periosteum was explored and the mental nerves protected.According to the clinical features of mandibular angle,curved mandibular angle osteotomy,mandible margin osteotomy or outer cotex splitting osteotomy were performed.Results All the osteotomy of prominent mandibular angle reductions could be completed with ultrasonic osteotomy.There were no complications of bleeding,nerve injury and malfracture happened.After 1 year following-up,the outlines of lower mandible were natural and concordant.Compared with traditional osteotomy devices,ultrasonic osteotomy was smoother and more precisely.Conclusions Ultrasonic osteotomy can improve the precise and safty of mandibular angle reduction.but compared with traditional osteotomy devices,it takes more time for osteotomy procedure.Surgeons need adapt to the different feeling and control methods.

OBJECTIVE To investigate the clinical characteristics,treatment and prognosis of laryngotracheal stenosis due to relapsing polychondritis (RP).METHODS The clinical data of 6 patients with laryngotracheal stenosis due to RP were reviewed retrospectively.RESULTS From 1996 to 2006,6 patients with laryngotracheal stenosis due to RP were managed in our hospital.Respiratory tract lesions were diffuse and extensive.Of them,4 patients accepted laryngotracheal reconstruction using surgical flaps with or without pedicle,2 accepted dilation of trachea in thoracic segments.Five patients were cured without recurrence.CONCLUSION Treatment of laryngotracheal stenosis due to RP is very difficult.If the surgical opportunity and methods were selected correctly according to each patient,good results can also be obtained.

Objective: To observe the effectiveness of combinative use of gentamycin, metronidazole and rifampin in the treatment of ulcerative colonitis and explore the etiology of the disease.　Methods: 30 and 26 patients were allocated to treatment group and control group, respectively. Maintained clysis with a combination of gentamycin, metronidazole and rifampin in warm normal saline were administered to those in the treatment group twice a day for two weeks, while SASP and prednisone were administered to those in the control group for two weeks.　Results: The alleviation rate of the treatment group is higher than that of the control group.　Conclusion: Combinative use of gentamycin, metronidazole and rifampin for maintained clysis is a effective treatment for ulcerative colonitis.

Objective:To investigate the effect of the musculo-periosteum flap of the sternocleidomastoideus with clavicular periosteum on the reconstruction of extensiveness laryngotracheal defect. Method: Retrospectively studied 49 patients, who admited in our department from 1996 to 2005 years for severe laryngotracheal defect. There were 28 males and 21 females aged from 15 to 69 years old (mean age was 47 years old). The causes of laryngotracheal defect were laryngotracheal stenosis(31 cases) and surgery for thyroid carcinoma invading trachea (18 cases). All of 49 cases were treated with the graft of musculo-periosteum flap of the sternocleidomastoideus with clavicular periosteum and placed a silicon T-tube stenting for 3 to 6 months. Result; All of 49 cases were successfully decannulated with recuperative normal airway patency and effective phonation. The follow up ranged from 2 to 10 years, and the effect of operation was steady. Conclusion:The musculo-periosteum flap of the sternocleidomastoideus with clavicular periosteum is an ideal graft for the reconstruction of cervical extensiveness tracheal defect.

Objective To apply Six-minute Walk Test (6MWT) in acute stroke patients and analyze the results. Methods From Novem-ber, 2014 to January, 2015, 29 acute stroke patients with multiple or single infarction accepted 6MWT. The distance, distance per minute, blood pressure and heart rate before and after test, adverse events or discomforts during the test were recorded. Weak and fatigue scores were calculated. Results The mean of distance in acute stroke patients was (240.1±17.2) m, that was (46.8±3.3)%of the predicted values in the healthy. Male patients walked (255.4±21.40) m, not different from (214.9±28.4) m in female (t=-1.151, P=0.26). The distance liked to be negatively correlated with age (r=-0.356, P=0.058). The distance was similar in each minute. Weak score was (46.8±3.3)%, fatigue score was mostly between-20 and 20, and no correlation was found between them. Blood pressure and heart rate increased significantly at the end of the test (t>2.476, P<0.05). Few of patients complained mild discomforts. Conclusion 6MWT is safe and suitable for acute stroke patients for physical mobility judgement, but adverse events need to be cared.

0.05). The incidence of restenosis and major adverse cardiovascular events were significantly less in the hyperbaric oxygen group than that in the control group (6.67% vs 22.58% for restenosis, and 8.82% vs 38.24% for major adverse cardiovascular events; P0.05). No severe adverse effect was found during hyperbaric oxygen therapy in the hyperbaric oxygen group. Conclusion Hyperbaric oxygen therapy is effective and safe in preventing restenosis after intracoronary stenting.

Objective To study the effects on tissue CT number caused by scan protocols.Methods The phantom was repeatedly scanned in different protocols by changing only one of parameters,such as X-ray tube voltage,mAs and recon kernel,while other parameters were ketp unchanged.The CT number of different materials in phantom were measured and analyzed.Results The CT numbers of tissues changed remarkably with the tube voltage and had different relativity for different tissues.The CT numbers had positive correlation with kV for such maierials as polyethyle,lexan,perspex,but for teflon the correlation was negative.The mAs and recon kernel had no effects on CT number.Conclusions The CT number of tissue changes with scanning X-ray tube voltage,so the setting of scan parameters should be taken into account in image diagnosis and radiotherapy.

Objective To determine the effect of signal transducers and activators of transcription 3 (STAT3) gene silencing by shRNA mediated by lentiviral vector for the treatment of colorectal cancer. Methods The recombinant lentiviral vector pRNAT-shSTAT3, empty lentiviral vector pRNAT-GFP, and lentiviral packaging plasmids in supernatant were collected to transfect HT-29 cells for harvesting the HT-29-shSTAT3 cells and HT29-GFP cells. Fifteen male rats were divided into three groups (n = 5 ), and then they were inoculated with HT-29cells, HT-29-GFP cells and HT-29-shSTAT3 cells, respectively. Cell growth was assessed by MTT assay and the changes in cell cycle were detected by flow cytometry. The changes in microvessel density (MVD) of tumors were detected by immunohistochemistry. All data were analysed by one-way analysis of variance. Results The growth of HT-29-shSTAT3 cells was significantly suppressed compared with HT-29 and HT-29-GFP cells (F = 632.50,P ＜ 0. 05 ). The proportions of cells at the G0/G1 phase were 68.7% ± 2.9% in HT-29-shSTAT3 cells, 38.5% ±1.6% in HT-29-GFP cells and 38.7% ± 2.3% in HT-29 cells, with a significant difference among the three groups (F = 166.53, P ＜ 0.05 ). The MVDs of HT-29 cells, HT-29-GFP cells and HT-29-shSTAT3 cells were 29 ±5, 28 ±4 and 10 ±3, respectively, with a significant difference among the three groups (F=31.60, P ＜0.05). Conclusion STAT3 gene silencing by shRNA mediated by lentiviral vector can significantly inhibit the growth of colorectal cancer cells.

Objective To screen down regulated genes and find down regulated novel genes in gastric cancer. Methods Genes mRNA expression were detected between gastric cancer and normal gastric mucous membrane of five patients using cDNA microarray. Genes mRNA expression signals on hybridization membranes were analysized with computer software. Down regulated genes in gastric cancer were screened. cDNA suppression subtraction library was established by counterpart normal gastric mucous membrane mRNA(Tester) subtracting gastric cancer tissues mRNA(Driver) of five patients. After identification of the subtraction library, positive clones choosen randomly were sequenced , and down regulated novel genes in gastric cancer were screened. Some of the genes were identified by RT PCR.Results Down regulated genes in gastric cancer consist of 60 genes including tumor suppressing genes, apoptosis related genes, DNA replication and transcript or translate related genes, cell cycle related genes, cell migration related genes, etc. Two unknown gene fragments in gastric cancer were cloned. Conclusions Sixty down regulated genes in gastric cancer are confirmed. They are involved in gastric tumorigenicity and metastasis. cDNA subtraction library of gastric cancer was constructed successfully. Two down regulated novel gene fragments in gastric cancer was found.

OBJECTIVE: To discuss the function and operative method of silicon T tube in laryngotracheal reconstruction. METHOD: Two hundred and ninety-seven patients of laryngotracheal stenosis were operated with laryngotracheal reconstruction in our department. All of patients were tracheostomy dependent before reconstruction and were placed a silicon T-tube stenting for 3 to 6 months after reconstruction. RESULT: Two hundred and eighty-nine patients (97.3%) were successfully decannulated with good airway patency and effective phonation. They were followed up from 1 to 10 years, and no recurrence was found. CONCLUSION Silicon T-tube is an effective and safe stent for laryngotracheal reconstruction. Paying attention to some application details may avoid the complication and obtain a satisfactory effect.
Adolescent ; Adult ; Child ; Female ; Humans ; Laryngostenosis ; surgery ; Male ; Middle Aged ; Reconstructive Surgical Procedures ; instrumentation ; methods ; Silicon ; Tracheal Stenosis ; surgery ; Young Adult