Objective To investigate the therapeutic effects of endovascular management for oculomotor nerve palsy caused by unruptured aneurysm of posterior communicating artery.Methods Endovascular treatment was carried out in 11 patients with oculomotor nerve palsy due to unruptured aneurysm of posterior communicating artery.The choice of the therapeutic opportune moment and the treatment way were retrospectively evaluated.The relationship between the therapeutic results and the treatment time and way was analyzed.Results Of the 11 patients,complete recovery of oculomotor nerve palsy was obtained in 10(90.91%) and partial recovery in one(9.09%).Conclusion Oculomotor nerve palsy cause by unruptured aneurysm of posterior communicating artery can be effectively treated by endovascular management,and the recovery of oculomotor nerve function depends on the time to take treatment and the degree of nerve palsy.

Objective To investigate the correlation between minimum apparent diffusion coefficient ( ADC) values and consistency of intracranial meningiomas of different parts and nature, providing radiographic evidence of selection for surgical approach. Methods The routine MRI, diffusion-weighted imaging imaging (DWI), ADC maps and ADC value of 23 patients (25 cases) who were confirmed as men-ingiomas through surgery and pathology were retrospectively analyzed and compared with the surgical findings and pathology results. Results ADC values in meningiomas with a hard consistency were significantly lower than those with a soft consistency. Meningiomas with low mini-mum ADC were considered to have a hard consistency. Conclusion The consistency of meningiomas is an important factor in developing the strategy of surgical resection and predicting the degree of removal. The minimum ADC value might have clinical use as a predictor of menin-gioma consistency.

Objective To investigate the risk factors of acute exacerbation of chronic obstructive pulmonary disease(AECOPD) combined with respiratory failure.Methods The clinical data of 120 patients with AECOPD combined with respiratory failure were retrospectively analyzed.The patients were divided into disease improved group (96 cases) and disease serious group (24 cases,including death) according to the treatment outcome.Risk factor and treatment strategies of the two groups were statistically analyzed.Results There was no significant difference in age,sex,disease course and arterial blood oxygen partial pressure(P ＞ 0.05).The body mass index,albumin,pH,successful cough and expectoration rate,nutritional support rate,and noninvasive mechanical ventilation rate in disease improved group was higher than that in disease serious group[(28.5 ± 9.8) kg/m2 vs.(23.3 ± 7.4) kg/m2,(21.4 ± 7.9) g/L vs.(19.3 ± 6.8) g/L,7.23 ± 0.20 vs.7.11 ± 0.17,79.2％ (76/96) vs.25.0％ (6/24),58.3％ (56/96) vs.33.3％ (8/24),81.2％ (78/96) vs.62.5％ (15/24)],arterial blood carbon dioxide partial pressure,mild consciousness obstacle rate,multiple drug-resistant infections rate,fungal infection rate,nasal feeding rate,hormone use time and the incidence of heart failure,pulmonary encephalopathy,hepatorenal function damage and upper gastrointestinal bleeding in disease improved group was lower than that in disease serious group [(10.08 ±1.71) kPa vs.(11.98 ± 2.03) kPa,13.5％ (13/96) vs.58.3％ (14/24),22.9％ (22/96) vs.41.7％ (10/24),0 vs.29.2％ (7/24),50.0％(48/96) vs.75.0％(18/24),(5.3 ± 1.3) d vs.(11.3 ± 3.8) d,8.3％(8/96) vs.25.0％(6/24),13.5％(13/96) vs.70.8％(17/24),28.1％(27/96) vs.41.7％(10/24),5.2％(5/96) vs.12.5％(3/24)],and there was significant difference (P ＜ 0.05).Conclusion Complicating disease,nutritional status,consciousness,capability of sputum exclusion,the degree of respiratory infection,treatment with noninv asive positive pressure ventilation,arterial gas analysis index are the correlated factors of prognosis in AECOPD combined with respiratory failure.

BACKGROUND: Titanium alloy implant has been widely used in the clinic. But there are few reports addressing on corrosion performance of medical titanium alloy dental implant, in particular in different physiological electrolytes. OBJECTIVE: To investigate the corrosion behaviors of medical titanium alloys in physiological saline, simulated saliva, and simulated body fluid. DESIGN, TIME AND SETTING: A randomized grouping, controlled observation was performed at the School of Stomatology, Lanzhou University and State Key Laboratory of Solid Lubdcation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences between November 2008 and March 2009. MATERIALS: Medical titanium alloys (Ti-6Al-4V) were cut into 10 mm×10 min×1 mm sheets and were randomly divided into 3 groups, with 10 sheets in each group. METHODS: Corrosion performance of titanium alloys in physiological saline, simulated saliva, and simulated body fluid was investigated using electrochemical measurements. Following electrochemical corrosion, surface morphologies and wettability of samples were also observed using scanning electron microscope and CA-A type contact angle tester. MAIN OUTCOME MEASURES: Tafel curve, surface morphology, and contact angle of medical titanium alloys in three physiological electrolytes after 4 days of electrochemical corrosion. RESULTS: The corrosion of titanium alloys was most severe in simulated saliva, followed by simulated body fluid, and mildest in physiological saline. Scanning electron microscope results demonstrated that medical titanium alloy surface exhibited many holes after corrosion by physiological saline, showed rough surface with a slightly changed number of holes after corrosion by simulated body fluid, and presented with an increased number of holes, with aperture greatly increased in some holes after corrosion by simulated saliva. The contact angles of titanium alloys were all reduced after corrosion of three electrolytes. CONCLUSION: The corrosion of titanium alloy was most serious in simulated saliva. Thus, corresponding protection measures should be given in clinical application.

Objective To investigate the antioxidative and antiaging effects of the bioactive extract from Agrocybe aegerita. Method Fruit flies and D-galactose induced aging mice were fed with the bioactive extract from Agrocybe aegerita. The lifespan of fruit fly and spleen index, brain index,SOD activity in serum and lipofuscin level in 1iver of the mice were measured, and its acute toxic effect was studied. Results The bioactive extract from Agrocybe aegerita could significantly increase the mean lifespan and half death time of fruit flies. The percentage of life prolongation was 41.81% compared with the control. Compared to the models, SOD activity in serum,spleen index and brain index of male mice fed with 800mg/(kg.d) of the bioactive extract from Agrocybe aegerita were respectively increased by 42.36%, 33.33% and 17.85%,while lipofuscin content of liver decreased by 50.06%. 20g/(kg.d) of the bioactive extract from Agrocybe aegerita was safe for mouse. Conclusion The bioactive extract from Agrocybe aegerita have obviously antioxidative and antiaging effects with little side effect.

BACKGROUND:With the development of technology,electromagnetic irradiation has been applied in many fields;meanwhile,health of people could be threatened by electromagnetic exposure.Reproductive system of males is the major target of electromagnetic irradiation.But under the condition of electromagnetic exposure,the change of testosterone and its mechanism remain unknown. OBJECTIVE:To study the effect of electromagnetic irradiation on steroidogenic acute regulatory protein(StAR) and cytochrome P450 cholesterol side-chain cleavage(P450scc) in the tissues of the testis of the adult rats,and to preliminarily reveal the molecular mechanism of electromagnetic radiation that affects the synthesis of testosterone. DESIGN:A randomized controlled study. SETTING:Department of Nuclear Medicine and Staff Room of Labour Hygiene, Institute of Field Surgery,Daping Hospital of the Third Military Medical University of Chinese PLA. PARTICIPANTS:The study was completed in the Department of Nuclear Medicine and Staff Room of Labour Hygiene, Institute of Field Surgery,Daping Hospital of the Third Military Medical University of Chinese PLA from June 2003 to May 2004.A total of 75 male Wistar rats of clean degree II,weighing 180 to 220 g,were randomly divided into 5 groups:control group,and groups of 3,6,24,72 hours after electromagnetic irradiation with 15 rats in each group. INTERVENTIONS:The rats were exposed to microwave with the peak power of 90 W/cm2 for 15 minutes successively,and all the rats survived the irradiation.The serum contents of testosterone of rats in the groups of 3,6,24,72 hours after electromagnetic irradiation and control group were measured by using radioimmunoassay(RIA) respectively;meanwhile the levels of the StAR and P450scc mRNA in testis tissue were also determined with RT-PCR. MAIN OUTCOME MEASURES:Serum contents of testosterone in the groups of 3,6,24,72 hours after electromagnetic irradiation and control group;the expression levels of the StAR and P450scc mRNA in testis tissues. RESULTS:The serum contents of testosterone,the StAR and P450scc mRNA levels at the point of 3 hours after electromagnetic irradiation were significantly lower than those in the control group,and they were decreased by 83.1% ,57.3% and 53.6% respectively(P< 0.01).At the point of 6 hours, although those were increased a little, but were still obviously lower than those of the control group, and they were decreased by 52.6%, 17.9% and 29.2% respectively(P< 0.01,0.05) compared with the control group, and were recovered to the normal level at the point of 24 hours, but the contents of testosterone, the StAR and P450scc mRNA levels were significantly reduced again after 72 hours, and they were decreased by 57.6% , 39.5% , 53.5% respectively compared with those in the control group(P< 0.01). CONCLUSION:Electromagnetic irradiation can affect the expression of StAR and P450scc mRNA in the Leydig's cells of the adult rats, thereby decreasing the synthesis of testosterone.

Objective To investigate the expressions of EphA2 and EphrinA1 in bladder carcinomas and their clinical significance. Method The expressions of EphA2 and EphrinA1 were detected on bladder carcinomas (75 cases ) by immunohistochemistry S-P method. Results ( 1 ) The positive rates of expression of EphA2 and EphrinA1 were 61.3%(46/75) and 46.7%(35/75) respectively. (2) The expression of EphA2 was related to tumor size, lymphatic metastasis and TNM staging(P＜ 0.05),but not to gender,age and pathology type (P ＞ 0.05 ). ( 3 )The expression of EphrinA1 was related to tumor size and lymphatic metastasis (P ＜ 0.05 ), but not to gender, age, pathology type and TNM staging (P ＞ 0.05 ). (4)There was significantly positive correlation between the expression of EphA2 and EphrinA1 (P ＜ 0.05).Conclusions EphA2 and EphrinA1 are related to the occurrence and development of bladder carcinoma.The combined detection of EphA2 and EphrinA1 can help to predict the clinical and pathologic characteristics of bladder carcinoma. It is an important index to assist treatment, they are predictive factors for bladder carcinoma.

Objective To observe clinical application value of percutaneous interventional techniques for the treatment of complications of AIDS.Methods Twenty-one AIDS patients with complications were enrolled.CT guided percutaneous needle biopsy and drainage were conducted,and the correct rate of diagnosis,clinical curative effect and complications post-interventional therapy were observed.Results The operations of all patients executed successfully.Fourteen patients underwent 16 times biopsy,11 were correctly diagnosed,the diagnostic accordance rate was 81.25%.Drainage was performed in 6 patients with abscess or cystis,then the lesions completely disappeared in 3,deflated in 2,while the rest one needed continously draining.Partial splenic embolization (50%) was performed in 1 patient,and after operation platelet content increased,while hepatic function decreased temporality.No complicated infection and other severe complications occurred.Conclusion Percutaneous interventional techniques for the treatment of complications of AIDS are safe and feasible.Medical staffs should be careful to exposition of HIV infection.

Objective:To describe the surgical technique of direct anterior approach to total hip arthroplasty and to report the early clinical outcomes.Methods: A series of 100 consecutive,unselected patients who had 116 primary total hip arthroplasty surgeries (16 bilateral) done through direct anterior approach from March 11 2015 to June 21 2016 was reviewed.There were 50 male patients and 50 female patients.The average patient age was 51 years,and the average body mass index was 24.69 kg/m2.The preoperative diagnosis included avascular necrosis of femoral head,hip osteoarthritis,osteoarthritis se-condary to acetabular dysplasia,sequelae of hip old infection,ankylosing spondylitis,rheumatoid arthritis and avascular necrosis of femoral head after cannulated screws fixation of femoral neck fracture.There were 7 hips which had surgical history prior to the index hip arthroplasty,including 3 cases with bone graft treatment for avascular necrosis of femoral head through Smith-Peterson approach,2 cases with acetabular shelf procedures for acetabular dysplasia through Smith-Peterson approach,and 2 cases with cannulated screws fixation for femoral neck fracture (internal fixation residual).All were uncemented hips.The stems used in this study included 67 Triloc stems (DePuy company,USA),45 Corail stems (DePuy company,USA),2 Accolade stems (Stryker company,USA),1 Synergy stem (Smith-Nephew company,USA) and 1 Polarstem (Smith-Nephew company,USA).Results: The average follow up period was 8.5 months,the average incision scar length was 10 cm,and the average postoperative Harris score was 93.62.There was 95％ postoperative leg length discrepancy within 3 mm.The average cup inclination angle was 38.7°with 94.8％ in the range of 30° to 50°.The average cup anteversion angle was 14.3° with 94.2％ within the target range of 5° to 25°.The were 15 (12.9％) operative complications,including two femoral perforations (changing stem from Triloc to Corail),three calcar fractures (treated with cerclage wires),four greater trochanter fractures (2 were treated wire tension band,and 2 nondisplaced fractures untreated),one deep infection (debridement and retaining of the prothesis),one superficial infection (debridement),one hematoma and three wound healing complications (debridement).All the complications were successfully treated without any sequelae at the end of the latest follow-up.There was no postoperative dislocation.There was no major nerve and vascular injuries.There were 35 cases (30.2％) reporting symptoms of lateral femoral cutaneous nerve palsy.Conclusion: Direct anterior approach to total hip arthroplasty allows accurate and reproducible cup orientation positioning and leg length restoration and decreases the risk of postoperative dislocation,which is helpful for early rapid postoperative recovery.

Objective To compare the efficacy of percutaneous radiofrequency ablation (PRFA) and repeat hepatectomy for solitary recurrent hepatocellular carcinoma (HCC) with the diameter≤3 cm. Methods The clinical data of 151 patients with recurrent HCC (diameter≤3 cm) who were admitted to the Cancer Center of Sun Yat-Sen University from January 1999 to December 2009 were retrospectively analyzed. Of all the patients, 79received PRFA (PRFA group) and 72 received repeat hepatectomy (repeat hepatectomy group). The survival rate, morbidity and recurrence of the tumor between the two groups were compared. All data were analyzed using t test, chi-square test or Log-rank test, and the survival of the patients were analyzed using the Kaplan-Meier method. Results The mobidities of the PRFA group and repeat hepatectomy group were 13% (10/79) and 36%(26/72), respectively, with a significant difference between the two groups (x2=11.411, P＜0.05). The cumulative 1-, 2-, 3-, 4-, 5-year survival rates were 89.7%, 75.2%, 67.1%, 61.5%, 56.6% in the PRFA group, and 86.0%, 67.6%, 53.6%, 44.1%, 40.2% in the repeat hepatectomy group, with no significant difference between the two groups (x2=1.610, P＞0.05). The cumulative 4-, 5-year survival rates of the PRFA group were significant higher than those in the repeat hepatectomy group (x2=4.682, 4. 196, P ＜ 0.05). The local tumor recurrence rate of the PRFA group was 5% (4/79), and the incisal margin recurrence rate was 3% (2/72) in the repeat hepatectomy group, with no significant difference between the two groups (x2=0.565, P＞0.05). Conclusion As a less invasive treatment method, PRFA is superior to repeat hepatectomy for solitary recurrent HCC with the diameter≤3 cm.