Objective To study the effects and mechanisms of infrasound with low sound pressure level on focal cerebral ischemia-refusion injury. Methods Focal cerebral ischemia was produced by 2 hours of occlusion of the middle cerebral artery in rats. lnfrasound generated by infrasound 8TM device was used as treatment factor. Thirty-two Sprague-Dawley rats were divided into three groups: sham group (n=8), model group (n=8) and in-frasound group (n=16) , and the infrasound group was subdivided into 20- and 120-min infrasound groups, with 8 rats in each group. Neurological symptoms was assessed at 2 h, 1 d, 3 d and 7 d, respectively. These rats were sacrificed after 7 days of infrasound treatment and their brains were harvested. The number of IGF-1 posive cells of ischemia cortex was counted by using immunohistochemical technique. Results Compared with model group, neurological symptoms of rats in 120-min infrasound group was significantly improved (P<0.05); the number of IGF-1 positive cells of ischemia cortex in 120-min infrasound group increased significantly as compared with that in model group (P<0.01). Conclusion Infrasound with low sound pressure level (120 min/d, 7 d) could exert neuroprotective effect in focal cerebral ischemia injury by increasing expression of IGF-1 in brain.

Objective To examine the neuroprotective effect of pulsed magnetic field in a animal focal cere-bral ischemica-reperfusion injury model. Methods Forty-eight Sprague-Dawley (SD) rats were randomized into 3 groups, a sham-operation group, a model group and a pulsed magnetic field group, with rats 16 in each group. Mid-dle cerebral artery occlusion (MCAO) method was employed to establish the focal cerebral ischemia-reperfusion inju-ry model in rats of model group and pulsed magnetic field group. Rats in sham-operation group was subject to the same operation procedure but not underwent ischemia-reperfusion. The infarction volume, histopathological damage and expressions of IGF-1 in ischemic brain tissue were investigated to evaluate the effect of pulsed magnetic field. Results The infarction volume was reduced, histopathological damage alleviated and expressions of IGF-1 in ische-mic brain tissue elevated in the pulsed magnetic field group as compared against the model group (P<0.05). Con-clusions Pulsed magnetic field might provide neuro-protection against cerebral ischemia-reperfusion injury.

Objective To observe dynamically the expression of insulin-like growth factor(IGF-1)in the brain and liver,and to explore changes in IGF-1 levels.Methods The thread method waa used to establish middle cerebral artery occlusion in rats.The expression of IGF-1 on the ischemic side of the cerebral cortex and in the liver wag observed dynamically using immunohistochemical techniques. Results The number of IGF-1-positive cells increased significantly,peaking on the 3rd day in the cortex and the 7th day in the liver.Conclusion The expression of IGF-1 Wag upregulated in the brain after the experimental cerebral ischemia;peripheral humoral regulation of IGF-1 responded more slowly and recovered to some extent at the 7th day after cerebral ischemia.

Objective To present the authors' initial experience of treating auricular arteriovenous malformations (AVMs) with ethanol embolization and to assess the clinical effectiveness of this therapeutic method. Methods Twenty-two patients with AVMs were enrolled in this study. Through local puncturing or super-selective catheterization the absolute ethanol, or diluted alcohol (based on the pattern of the AVMs), was manually injected into the abnormal vascular plexus of the auricular lesion. The clinical results were estimated with physical examination or angiography at intervals of 3 ～ 4 month, and telephone questionnaire was made at monthly intervals for all patients. Results Thirty-eight ethanol embolization procedures were performed, the amount of ethanol used during the procedure ranged from 4 ml to 65 ml. After the treatment the clinical symptoms were improved, which were manifested as healing of the ulceration, stop of bleeding, disappearing or alleviation of tinnitus. Angiographic examination showed that the abnormal vascular lesion was completely vanished in 9 cases, decreased by 50% -75% in 8 cases and decreased less than 50% in remaining 5 cases. The common complications included irreversible local necrosis and vesiculation. Conclusion For the treatment of auricular AVMs ethanol embolization is an effective and safe method, which might become the therapy of first choice.

Objective To investigate the effect of mycophenolic acid on the proliferation of smooth muscle cells (SMCs) in rats' pulmonary arterial at cellular level. Methods Growth curve, MTT tests, and flow cytometry were used to detect the number of proliferative cells, the A-value of living cells and the DNA content of the control and drugs groups respectively and the number of cells in G1-phase, S-phase, G2M- phase and the proliferation index were calculated. Results Compared with the control group, the number of living cells in the mycopbenolic acid groups (with the concentration of 1, 10, 100 μmol/L) decreased, except the lowest dosage group (100 nmol/L). The difference was statistically significant (P<0.01). The living cells measured by MTT dose-dependently reduced in the mycophenolic acid groups. In the mycophenolic acid groups, the fraction of living cells in the S-phase and G2M-phase decreased respectively while that in G1- phase increased, and the proliferation index decreased. All these responses presented with a dose-dependent manner. Conclusion Mycophenolic acid can effectively inhibit the proliferation of rats' pulmonary arterial SMCs. This process happens mainly in ONA synthesis phase, and is dose dependent. In addition, these effective concentrations are all in the available range for clinical application.

Objective To investigate the effect of depression on the incidence of osteoporosis in patients with maintenance peritoneal dialysis (MPD).Methods We enrolled 80 MPD patients,who underwent peritoneal dialysis in our dialysis center.The clinical data and biochemical parameters of all patients were collected,bone mineral density was detected and the Self-rating depression scale was used to evaluate depression state.Results Among the 80 enrolled MPD patients,34 patients had osteoporosis (42.5％),48 patients had the presence of depression (60％).Logistic regression analysis showed that age,dialysis age,gender,diabetes history and depression state were the risk factors for osteoporosis in MPD patients,the depression state was negatively correlated with BMD of lumbar and femoral neck (r=-0.347,r=0.426,P＜0.05).Conclusion Depression state may be a risk factor for osteoporosis in clinic,it is of great significance to focus on the psychological state of MPD patients in the prevention and treatment of osteoporosis.

Objective To explore life experience in chronic obstructive pulmonary disease (COPD) patients with the habit of exercise for more than 5 years,to enhance the confidence of participating in the rehabilitation in other patients, to help the medical staff pay more attention to guide the patients with COPD to take up the rehabilitation exercise. Methods The narrative research method in qualitative research was used to analyze the collected data. Results The study found that the coping approach of the contradiction between exercise and dyspnea, the ability to live together with the disease peacefully and the enthusiasm of persuing life were deserved to be learned. Conclusions Full of perseverance and persisted rehabilitation exercise may alleviate the symptoms, reduce the number of acute exacerbation of COPD and improve the quality of life for COPD patients. Medical staff should encourage COPD patients to participate in the rehabilitation in the right time with appropriate methods.

Objective To determine the value of five repetition sit-to-stand test (FTSST) to evaluate lower limb function in the patients with chronic obstructive pulmonary disease (COPD).Methods Sixty-one patients with COPD were tested for FTSST,isokinetic testing muscle strength for lower limb,6-minute walking test.The relationship between FTSST time and muscle strength,6-minute walking test distance (6MWD) were analyzed.Results FTSST time was (7.86±2.21) s,extensor peak torque was (67.58± 24.83) Nm,extensor relative peak torque was 0.95(0.46) Nm/kg,6MWD was (444.05±112.53) m.FTSST time related to extensor peak torque,extensor relative peak torque,6MWD and types of complication,correlation coefficient values were-0.303,-0.393,-0.428,F =2.813,P ＜ 0.05.Multivariate linear regression analysis showed that when the dependent variable was FTSST time,the variables of the equation were 6MWD and types of complication.Conclusions FTSST can be used for the rapid evaluation of lower extremity function in patients with COPD.The lower limb function gets worse,the FTSST time will be longer.Nursing staff should pay more attention to the lower limb function of patients with COPD,along with complications,using FTSST to evaluate lower extremity function.

OBJECTIVE:To analysis the characteristics and regularity of the adverse drug reaction(ADR)occurred in our hospital. METHODS:307 ADR cases collected from 2004 to 2008 in our hospital were analyzed statistically in respect of patient’s age and sex,route of administration,categories of drugs,organs and systems involved in ADR and clinical manifestations,etc. RESULTS:Of total 307 ADR cases,more cases were woman;45.93% of cases were aged ≤18 a and 60 a. 80.13% of ADR cases were induced via intravenous administration. The incidence of ADR cases were mainly induced by antiinfective drugs,accounted for 48.53%. The most common manifestation of the ADR was lesion of skin and its appendants(27.97%),followed by injury of digestive system(16.10%). CONCLUSION:Great importance should be attached to rational use of anti-infective drugs and its management to reduce or avoid the occurrence of ADR and improve the quality of ADR reports.

OBJECTIVE:To establish a GC-MS method to identify the volatile constituents in Radix Isatidis.METHODS:The method of wet distillation was applied to extracting volatile oil from Radix Isatidis,the chromatographic column was OV-1,and the flow rate was 1.0mL?min-1,EI ion source was used by MS.The volatile constituents in Radix Isatidis were identified and analyzed by NIS107 system.RESULTS:22 chromatographic peaks were separated,19 chemical compounds were identified,representing 90.51% of total amount,hexadecanoic acid had highest content,accounting for 38.52% of total amount.CONCLUSION:This experiment has provided initial usable data for comprehensive utilization of Radix Isatidis.