Objective To explore the feasibility and accuracy of dual-source CT (DSCT)in evaluating aortic regurgitation (AR). Methods Among 78 patients who underwent both DSCT and TTE,38 patients were diagnosed as AR and 40 without AR served as controls.Maximum regurgitant orifice area (ROA)in diastole was planimetrically measured with DSCT,and measurements were compared with semiquantitative classification of TTE.Results DSCT correctly identified 37 patients with AR.Compared with TTE,two patients were false positive and three patients were false negative findings by DSCT (sensitivity 92%,specificity 95%, positive predictive value 94%,and negative predictive value 93%).ROA measured by DSCT (0.32 cm2 ±0.44 cm2 )was signifi-cantly correlated with TTE classification (r=0.85,P<0.01).With receiver operating characteristic curve analysis,discrimination between degrees of AR with DSCT was high accurate when using cutoff ROAs of 0.08 cm2 and 0.58 cm2 .Conclusion Planimetric measurement of ROA with DSCT is accurate for the quantitative evaluation of AR.

Objective:To study the effects and mechanisms of Hongqi formular combined with exercise preconditioning against myocardial ischemic reperfusion injury in rats.Method:Fifty health male SD rats were randomly divided into sham,IR,EP,HP and EHP group.After establishing of EP animal model,the rats were ligated ramus descendens coronary artery to induce myocardial ischemic reperfusion model.The serum cardiac troponin Ⅰ (cTn Ⅰ),myocardium IL-6,TNF-α were detected by enzyme linked immunosorbent assay (ELISA).The myocardium MDA was detected by chemical colorimetry method.The myocardium SOD was detected by xanthine hydrocarbonylation.The serum ET,6-k-PGF1α,TXB2 density were detected by radioimmunoassay,and the myocardium Ca2+ density was detected by atom absorption spectrophotometry.Result:①As compared with the group IR,the serum cTn Ⅰ decreased significantly in groups EP,HP and EHP;As compared with the group EHP,the cTn Ⅰ level in serum was increased in groups EP and HP.②As compared with the group IR,the Ca2+ level in myocardial sarcoplasmic reticulum was decreased significantly in groups EP,HP and EHP;As compared with the group EHP,the Ca2+ level in myocardial sarcoplasmic reticulum was decreased significantly in group EP.③As compared with the group IR,the ET in serum were decreased significantly in groups EP,HP and EHP;As compared with the group EHP,the ET,TXB2 in serum were increased significantly in groups EP and the 6-k-PGF1αin serum were decreased significantly in groups EP.④As compared with the group IR,the IL-6 and TNF-α in cardiac muscle were decreased in groups EP,HP and EHP;As compared with the group EHP,the IL-6 and TNF-α in cardiac muscle were increased in groups EP and HP.⑤As compared with the group IR,the SOD in cardiac muscle was increased significantly in groups EP,HP and EHP and the MDA in cardiac muscle was decreased significantly in groups EP,HP and EHP;As compared with the group EHP,the SOD in cardiac muscle was decreased significantly in groups EP and the MDA in cardiac muscle was decreased significantly in group EP.Conclusion:Hongqi formular combined with exercise preconditioning produces cardio-protective effect during myocardial ischemic reperfusion,which may be related with the enhanced anti-oxidant ability,the decreased blood cell damage,the maintainace of vascular endothelium function,the improved microcirculation and the decreased calcium overloading.

Purpose: To investigate the therapeutic effect of acupuncture and herbs in chloasma.Methods: Chloasma was divided into three patterns and treated by acupuncture plus oral administration and external application of Chinese herbs. Results: There was an obvious therapeutic effect in chloasma treated by combination of acupuncture and herbal drugs. After two courses of the treatments, the effective rate accounted for 93.3% in 45 cases. Conclusion: There was an obvious therapeutic effect in chloasma treated by combination of acupuncture and herbal drugs.

OBJECTIVETo explore the quantitative relationship between the dust mass concentration and fiber number concentration of refractory ceramic fibres.

METHODSA typical refractory ceramic fiber plant was selected as the study site. Fifty-three paired samples of total dust mass concentration and fiber number concentration were collected using the long-time fixed site mode. The total dust mass concentration was measured according to the GBZ/T 192.1-2007 (Measurement of dust in the air of workplace, part 1: Total dust concentration). Membrane filter method/phase-contrast optical microscopy was used to determine the fiber number concentration. Univariate analysis was used to describe the distribution of the two concentrations and their ratio. Spearman rank correlation, as well as linear regression, logarithmic curve, polynomial, power function, and exponential curve model, were used to explore the relationship between the two concentrations. Results The range of the total dust mass concentration (x) was 0.45-13.82 mg/m3. The range of the fiber number concentration (y) was 0.01-1.04 f/ml. The range of the ratio (x/y) was 4-158. All of the three parameters did not follow normal distribution (P<0.000 1). The two concentrations showed a positive correlation (r,=0.705 22, P< 0.000 1). All the coefficients of determination (R2) of linear regression, logarithmic curve, polynomial, power function, and exponential curve model were relatively low. The trinomial curve model had the highest R2 (0.6848) and the fitted equation was y=-0.001, 1x+0.010 4x2+0.101 4x-0.055 1.

CONCLUSIONThere is a positive correlation between the total dust mass concentration and fiber number concentration of refractory ceramic fibers. However, there is no fixed regression relationship between the two concentrations, and neither is a definite coefficient which can be used to convert each other. The two concentrations cannot be replaced by each other.

Objective To evaluate the feasibility of monitoring intracranial pressure(ICP) by determining intraocular pressure(IOP).Methods ICP(55 case times) in 34 patients with central neural system diseases was measured by lumbar puncture,and their IOP of both eyes was measured by two scales of Schiotz tonometer and the mean value was calculated.Results There was a significant correlation between ICP and mean IOP(P

Objective To evaluate parathyroidectomy combined with parathyroid tissue transplantation in forearm in the treatment of severe secondary hyperparathyroidism (SHP). Methods 9 cases treated with the procedure were reviewed.The diagnosis,operation indication and peri operative management were discussed. Results Thirty five hypertrophic parathyroids were resected from the 9 cases with SHP,and a left thyroidectomy was carried out for one case.Some parathyroid tissue has been grafted into the forearm for every patient.All of those grafts have survived.The symptoms va nished in all and the relevent laboratory tests recovered to normal after the surgery. Conclusions This surgical strategy is safe and effective for SHP not benefited from medical therapy.

Objective To highlight the diagnostic and t herapeutic procedures for extra-adrenal pheochromocytoma. Methods Thirty-eight cases of extra-adrenal pheochromocytoma proven patholo gically from 1998 to 2002 were reviewed and studied.Hypertension was observed in 34 cases and intermittent macrohematuria in 4 patients.Another 2 cases were adm itted to hospital with abdomen masses through routinely physical examination.Uri nary VMA,serum and urinary catecholamine were measured in 33 cases.38 cases had B-model ultrasound examination and 34 cases took CT scan.The level of urine VMA elevated in 30 cases(91%) and serum or urinary catecholamine were elevated in 2 8 (85%).The positive rates of localization of B-ultrasound and CT were 92% and 100%,respectively.29 cases took ?-receptor blocker for at least 2 weeks preope ratively.There were 6 cases operated under epidural anesthesia and 32 general an esthesia.Six cases were operated transvesical.10 cases with lumber incision and 19 with abdominal incision.The other 3 cases operated laparoscopically. Results Tumor location,6 cases in bladder wall,7 in renal hilum, 9 in upper pole of kidney,4 in low pole,10 in anterio-lateral to the adrenal gl and,and 2 cases of multifoci.The specimens were from 2 to 9 cm in size.Among 34 cases with hypertension,the blood pressure of 26 patients return to normal and 2 cases were still hypertensive.10 cases were assayed as malignant pheochromocyto ma.There were 9 cases of recurrence or metastases and 5 patients died during fol lowed-up from 13 months to 10 years. Conclusions Urine VMA level is a useful marker to detect extra-adrenal pheochromocytoma and CT sc an is the most reliable in localizing the lesions. 131I-MIBG scintigra phy is of great value for the localization and quantitative for extra-renal phe ochromocytoma with high sensitivity and accuracy.It may be also used as a therap eutic method.Surgical manipulation of the tumor is the best management and metic ulous perioperative management is extremely important.Measuring the level of uri nary catecholamine can monitor the recurrence or metastasis of the tumor.

Objective To compare the effect of allogeneic and autologous blood transfusion on postoperative immunoreaction in patients after spinal surgeries.Methods A total of 44 patients undergoing spinal operations were randomly divided into two groups.Allogeneic (n=22) or autologous (n=22) buffy-coat-depleted red cells were used in the patients during the operations.The serum levels of IL-6,IFN-?,and TNF-?were determined preoperatively and then re-measured 1 and 7 days after the operations. Results In theautologous group,both IFN-?and IL-6 increased after the oprerations,the level of IL-6 was significantly higher than that in the allogeneic group at days 1 and 7.The concentration of TNF-?did not change after the surgeries in the two groups. Conclusions By autologous blood transfusion,the serum levels of IFN-?and IL-6 can be increased significantly after spinal operation,meanwhile the concentration of TNF-?remains stable.The postoperative inhibitory effect of the procedure on immunocytokines is significantly weaker than that of allogeneic blood transfusion,indicating that autologous blood transfuion can protect or even increase immunofunction after spinal operation.

8 cases of adrenal tumors were subjected to laparoscopy from October 2000 to June 2001.Success was achieved in 7 cases, one patient was convevted to open surgery because of bleeding. Recovery was uneventful in all without complication. The indications and technique of operation as well as complications were discussed.