AIM: To study the effect of shenmai injection (SMI), a Chinese medicine, on nitric oxide and the expression of endothelial nitric oxide synthase (eNOS) mRNA in myocardium of rats with experimental myocardial ischemia. METHODS: Rats were randomly divided into four groups: control, model (ischemia), SMI 1 and SMI 2 group. A rat model of acute myocardial ischemia was established by isoprenaline treatment and the lift of ST segment in ECG was used as the index of myocardial ischemia. The nitric oxide (NO) contents in serum and myocardium and the expression of eNOS mRNA in myocardium were measured. RESULTS: Compared with control group, ST segment of ECG was significantly elevated 20, 30, 40 min after myocardial ischemia in model group, the lift peak of ST segment occurred 20 min after myocardial ischemia, the concentration of NO in the serum and myocardium and the expression of eNOS mRNA in myocardium were significantly lowered in model group. Compared with the model group, in SMI 1 group and SMI 2 group, the concentration of NO in the serum and myocardium and the expression of eNOS mRNA in myocardium were significantly increased, the lift of ST segment were significantly reduced 20, 30, 40 min after myocardial ischemia. Compared with SMI 1 group, the concentration of NO in the serum and myocardium and the expression of eNOS mRNA in myocardium and the lift of ST segment were not statistically different in SMI 2 group. CONCLUSION: Shenmai injection can increase the expression of eNOS mRNA in myocardium and the content of NO, and protect against myocardial ischemia in rats.

Purpose To evaluate the breast imaging reporting and data system (BI-RADS) of ultrasound and 18F-lfuorodeoxyglucose (FDG) PET/CT in diagnosis of breast tumor, and to analyze the correlation between them. Materials and Methods 18F-FDG PET/CT images and ultrasound images of 103 patients with suspected breast cancer were retrospectively analyzed to get correlation between the maximum standardized uptake values (SUVmax) and BI-RADS. Sensitivity, speciifcity, positive predictive value, negative predictive value were compared with histology or follow-up results as golden standard. Results Of the 103 lesions, 46 were benign and 57 were malignant. Pearson correlation coefifcient was 0.464 (P<0.01). The sensitivity, speciifcity, positive predictive value, and negative predictive value of PET/CT were 89.47%, 73.91%, 80.95%and 84.99%, respectively;those of BI-RADS were 94.70%, 69.60%, 79.42%and 91.38%, respectively. The sensitivity, speciifcity, positive predictive value, and negative predictive value in patients with BI-RADS 3-4 were 88.90%, 71.40%, 66.65%, and 90.91%, respectively. The sensitivity, speciifcity, positive predictive value, and negative predictive value for BI-RADS grading diagnosis were 88.90%, 46.40%, 51.60%and 86.67%, respectively. Conclusion There is no signiifcant correlation between SUVmax and BI-RADS. BI-RADS has low speciifcity for patients with BI-RADS grade 3-4, while PET/CT can make up this shortcoming. Combined diagnosis in the breast disease can be potentially recommended in clinics.

A spectrophotometric method for the determination of calcium in milk, hair and urine was developed using metal complezing dye orthocresolphth-alein complexone(OCPC).The organic matter in the tested sample was destroyed by digestion. An aliquot of the digested solution was mixed with color developing reagent, alkaline OCPC, cantaining 8-quinolinol to suppress interference such as magnesium, and the absorbance was measured at 570 nm.The coefficients of variation were 0.87, 3.6 and 1.2% for milk, hair and urine samples; and the analytical recoveries of calcium from milk, hair and urine averaged 100.4, 101.0 and 98.5% respectively. The calcium content of milk and hair determined by this method was closely correlated with that of the ICP-AES method (r =0.994, p

Objective To detect genetic mutation of apolipoprotein B-100(apoB-100)in patients with primary hypercholesterolemia.Methods One special segment of apoB-100 gene from nucleotide 10549 to 10895 was amplified by polymerase chain reaction(PCR).The PCR products were denatured and hybridized with specific aligonucleotide labeled with digoxigenin,and were analyzed by single strand conformation polymorphism(SSCP)to detect the apoB-100 gene mutation 3531CGC→CGT or other mutations.Results Overall 41 members of 11 primary hypercholesterolemia families were detected,but the above genetic mutation was not detected.Conclusion This genetic mutation is unlikely to exist or of significantly low incidence in Chinese population,and might not be the main cause of primary hypercholesterolemia in the 11 primary hypercholesterolemia families.

ObjectiveTo evaluate the efficacy and safety of tirofiban in treatment of ST segment elevation acute myocardial infarction(STEAMI) no-reflow and acute thrombosis after emergency percutaneous coronary intervention(PCI). MethodsForty patients which were made definite diagnosis of STEAMI were intra-coronary artary injection fortirofiban after emergency PCI stenting occured no-reflow and acute thrombosis. First,the dose of 0.4μg·kg-1·min-1 was given from intra--coronary artary injection of tirofiban within three minutes, after 30min the dose were given 0.1μg·kg-1·min-1 for 48 hours. ResultsThe no re-flow and acute thrombosis was completely disappeared within five minutes,at the time,side effect with in one week was not observed. ConclusionsTirofiban treatment by direct injection in coronary arteries combined with emergency PCI, can increase the repeffusion rate of infarction related vessel in AMI patients,and improve TIMI reflow. This reperfusion method was effective and safe.

Objective To compare the clinical outcomes of Chinese rapamycin-eluting stents (Firebird stents) and imported paclitaxel-eluting stents ( Taxus stents ) in the treatment of acute myocardial infarction. Methods Ninety-seven patients with ST segment elevated acute myocardial infarction were treated with Firebird stents (in 51 patients) and Taxus stents (in 46 patients). The death rate, re-acute myocardial infarction, target lesion revascularization (TLR) ,and major adverse cardiac event (MACE) within 9 months after percutaneous coronary intervention ( PCI) were observed between the two groups. Results The rate of successful stent-implantation, angina,death, re-acute myocardial infarction, TLR and MACE was 100% ,9. 8% ,0% ,2. 0% ,0% , 11. 8% in the Firebird stent group and 100% ,8. 7% ,0% ,2. 2% ,0% ,0% and 10.9% in the Taxus stents group within 9 months after PCI. There was no significant difference between the two groups. Conclusions There is no significant difference in the clinical effect between the Firebird stent group and Taxus stent group within 9 months after PCI. However, the effect-cost ratio is better in the Firebird stent than the Taxus stent.

Objective Evaluate the efficiency of scientific research output of the 54 departments in a hospital,to put forward improvement suggestions based on the evaluation results.Methods Select appropriate indicators of scientific input and output,use the Data Envelopment Analysis method to evaluate and analyze the efficiency.Results According to the analysis of DEA,calculate the values of overall efficiency,technical efficiency,scale efficiency and scale income.Then compare and analyze the relative efficiency of different units scientific output,to identify the relatively superior department a mong the various categories.Conclusions According to the evaluation results,to find out the input surplus and insufficient output of each decision units.Then we will put forward suggestions on hospital resource allocation to optimize the scientific input and output,to improve the competitiveness of the hospital,and to activate the potential of each department's scientific research.

OBJECTIVE To study the electrophysiological character of the Auditory Brainstem Response to Speech Sounds (s-ABR) in healthy adults. METHODS We assessed the auditory brainstem response to a synthesized stop-consonant speech syllable /da/ in 40 native-Chinese speech adults (20 female). Timing components of the response were compared between males and females to determine the relationship between inducing rate ,latency of waves and sex and age of participants. RESULTS The latency of wave V and A was shorter in females was that of males (Vt(38)=-3.601, P =0.001, At(38)=-2.829, P=0.007).The other peaks latency except V、A can see difference between gender but do not have statistics differences (P>0.05); The latency has no statistical difference in different age (P>0.05); The amplitude has no statistical difference in different gender and age (P>0.05). CONCLUSION The waves of s-ABR has good stability for studying mechanism of auditory speech processing tools.

Objective To investigate the characteristics of auditory nerves and brainstem pathways,patho-physiological and nerve damages and the correlation between oxygen indexes,and the values of high stimulation ABR in patients with OSAHS.Methods Auditory brain stem responses (ABR)at rates of 11.1 times/s,31.1 times/s,51.1 times/s were performed in both the moderate-to-severe OSAHS group(5 cases of moderate and 34 cases of severe,in total of 39 cases ,78 ears)and the control group (34 cases,68 ears).According to the character-istics of ABR,the correlation with parameters of blood oxygen was studied.Results At the rate of 11.1 times/s, wave V latencies (5.79±0.22 ms)in OSAHS patients were longer than that in the control group.At the rate of 31.1 times/s,wave V latencies (5.98±0.19 ms)and waveⅠ(1.85±0.18 ms)in OSAHS patients were prolonged more than those in the control group.At the rate of 51.1 times/s,wave V latencies (6.09±0.25 ms)and waveⅠ(1.94±0.26 ms)in OSAHS patients were longer than those in the control group.Increasing stimulation rates from 11.1 times/s to 31.1 times/s showedΔⅠwas longer in OSAHS group(0.12±0.17 ms)than in the control group (0.07±0.11 ms).Increasing stimulation rates from 11.1 times/s to 51.1 times/s showedΔⅠwas longer in OS-AHS group(0.21±0.25 ms)than in the control group(0.15±0.10 ms).All above had correlations with hypoxia. Conclusion High stimulation rates in ABR by amplifying the waveⅠ latency confirm cochlear and auditory nerve damages near the cochlear segment in patients with moderate to severe OSAHS.Therefore the study of nerve injury in OSAHS patients should take blood oxygen saturation and hypoxia percentage rather than AHI.

Objective To evaluate a bypass surgery for the treatment of critical lower limb ischemia. MethodsFourty-five limbs in 39 patients with single outflow artery underwent arterial bypass graft, including femoropopliteal artificial graft to single outflow artery with autograft in 21 limbs (46.7%) and popliteal artery to calf vessel in 10 limbs (22.2%). Results Among 39 patients, one died of respiratory failure 5 days post-op (death rate 2.6%); one suffered from artificial graft occlusion (2.6%). The patency rate of graft was 100% on discharge. Healing rate of foot ulcer was 30%. Conclusions It is difficult to reconstruct blood flow for critical ischemic limb with single outflow artery, but good result is still expected by distal lower limb bypass graft. Distal bypass can result in a limb salvage or lowering of amputation level, providing a better nutritional support for the healing of foot ulcer.