OBJECTIVE:To establish a method for separation and determination of ethanol,dichloromethane and N,N-dimethylformamide in pidotimod tablets.METHODS:The residual organic solvents were quantitatively determined by GC on DB-624 capillary column with FID detector,using nitrogen as the carries gas.Temperature programming was carried out in which the column temperature was initially maintained at 40 ℃ for 5 minutes,then increased at a rate of 50 ℃ per minute to 200 ℃,and maintained at 200 ℃ for at least 10 minutes.The temperature at injection mouth was maintained at 160 ℃;the detector temperature was maintained at 280 ℃.The split ratio was 5∶1.RESULTS:3 residual organic solvents were completely separated and their determination was free of inference from hidden foreign substances.The linear ranges of the ethanol,dichloromethane and N,N-dimethylformamide were 10.036～802.88 (r=0.999 9),26.44～105.76 (r=0.999 6),and 1.76～140.8 (r=0.999 5) ?g?mL-1,respectively,and their average recovery rates were 102.4%,99.0%,and 99.2%,respectively,with RSD at 1.99%,3.34%,and 0.55%,respectively.CONCLUSION:The method is sensitive,accurate and rapid,and it is suitable for determination of residual organic solvents in pidotimod tablets.

Objective To investigate the factors associated with hospital infection in old inpatients with Alzheimer's disease. Methods 368 old inpatients with Alzheimer's disease were reviewed and analyzed with Logistic regression. Results There were 95 cases (25.81%) suffered in hospital infection to 116 case-times. As multivariate regression analysis, activities of daily living (OR=8.398, 95% CI: 5.343~12.098), invasive intervention (OR=2.842, 95%CI: 1.445~3.365), no insight (OR=4.457, 95%CI: 2.789~8.853), long-term use of antibiotics (OR=3.348, 95%CI: 1.693~6.336), chronic in bed (OR=3.258, 95%CI: 1.583~6.154), and antipsychotic drug (OR=2.243, 95%CI: 1.427~5.583) increased the risk of hospital infection independently, and ventilated timely (OR=0.546, 95%CI: 0.334~0.867) reduced the risk. Conclusion Good performance of basic and living nursing, less invasive intervention, reasonable use of antibiotics, antipsychotic monitoring,and intensive sterilization may reduce the incidence of hospital infection in inpatients with Alzheimer's disease.

Transforming growth factor-? (TGF-?) is a multifunctional peptide growth factor with a wide range of effects. TGF-? signals are conveyed through cell-surface serine/threonine kinase receptors to the downstream cytoplasmic mediators, known as Smads proteins. Receptor-regulated Smads become phosphorylated by activated type Ⅰ receptors and form heteromeric complexes with a common Smad-Smad4, which translocates into the nucleus to regulate gene transcription. Inhibitory Smads inhibit the activation of receptor-regulated Smads. There are positive, negative and feedback regulations in the Smads mediated TGF-? signaling pathway.

Objective To study the correlation with ketamine and its metabolite norketamine concentration in plasma and saliva in acute toxic rabbits.Methods Experimental rabbits were given intragastric(i.g.group,n=6)and intravenous(i.v.group,n=6)administration of ketamine respectively,and control tabbits(n=6)were given a same volume of physiologic saline.The plasma and saliva were collected before and after ketamine administration.Ketamine and norketamine in plasma and saliva were determined using GC/MS and GC.The correlation with ketamine(norketamine)concentration in plasma and saliva were artalyzed by a double variable Pearson correlation analysis.Results The correlation coefficients(r)of ketamine (norketamine)concentrations in plasma and saliva were from 0.80 to 0.95 in ketamine i.g.group and i. v.group.Conclusion There is a good relativity between the concentration of ketamine(norketamine)in plasma and in saliva.The ketamine(norketamine)concentration in saliva can be used to estimate the plasma concentration in the forensic identification of ketamine abuse.

Sixty five stroke patients undergoing rehabilitation training in our hospital from May 2010 to May 2013 were randomly divided into study group (n =32) and control group (n =33).Patients in study group received intramuscular injection of botulinum toxin A (BTX-A) in the affected limbs before rehabilitation training started.The F wave amplitude and F/M value,muscle tension and TUG test and 10 m free walking test results of patients in two groups were observed before and 4 weeks after treatment.Compared to the results before treatment,the amplitude of F wave and F/M value after 2 and 4 weeks of treatment in study group decreased significantly (P ＜ 0.05).Compared to control group,the indexes at each time point after treatment in study group were significantly different (P ＜ 0.05).The muscle tension score in study group after 4 weeks of treatment decreased significantly (P ＜ 0.05),and also lower than that in control group (P ＜ 0.05).Before treatment there were no significant differences in TUG test and 10 m free walk test between two groups (P ＞0.05) ; while TUG test and 10 m free walk test in study group were better than those in control group after 4 weeks of treatment (P ＜ 0.05).The TUG test and 10 m free walk test had little improvement in control group after treatment (P ＞ 0.05).The results indicate that botulinum toxin A injection can reduce amplitude of F wave in the corresponding segment of spinal cord motor neurons and improve the walking ability of stroke patients.

Objective To investigate the effects of Tirofiban on the expression of matrix metalloproteinase(MMP-9)and sCD40L in patients with acute coronary syndrome(ACS)after percutaneous coronary intervention(PCI)and to explore the potential mechanism of anti-artherosclerosis and stabilize plaque by Tirofiban.Methods Eighty-six patients with ACS were enrolled and were randomly divided into the control group and the Tirofiban group with different time periods after PCI.The expression of MMP-9 and sCD40L were tested by ELISA at 6 h,12 h,24 h,36 h after PCI.Results After application of Tirofiban 6 h,12 h,24 h,36 h,the expression of MMP-9 decreased from(228.25 ±0.015)ug/L to(53.56 ±0.02)μg/L and the expression of sCD40L decreased from(321.12 ±0.02)ng/L to(123.32 ±0.02)ng/L,compared with the control group,the difference was significant(P ＜ 0.05).Conclusions Tirofiban can inhibite the expression of sCD40L and MMP-9,the inhibition of the expression of MMP-9 may be related to the CD40/CD40L pathway.This effect may be one of the mechanism of reducing atherosclerotic plaque inflammation and preventing plaque rupture by Tirofiban.

Objective To study high resolution CT (HRCT) and MRI findings of temporal bone anomaly in patients with tinnitus and identify the optimal examination method in the detection of the anomaly. Methods The HRCT and MRI data were analyzed retrospectively in 1015 patients including 145 patients with pulsatile tinnitus (PT) and 870 patients with nonpulsatile tinnitus (NPT). The positive rates of HRCT and MRI in the identification of temporal bone anomaly were analyzed and the efficiency of various examination methods was compared in revealing the anomaly. Data were tested by Chi-square test analysis. Results Among 1015 patients, anomaly was seen in 767 cases (75.57%). High jugular bulb was found in 414 patients, accounting for 40. 79%. Sigmoid sinus anomaly was detected in 387 patients (38. 13%), while otitis media was found in 148 cases (14. 58%), and low middle cranial fossa in 70 cases (6. 90%). The positive rate of HRCT in the detection of high jugular bulb was 54. 89% (365/665), which was significantly higher than those of other methods (P ＜ 0. 05). The positive rate of enhanced HRCT in showing sigmoid sinus anomaly was 73.68% (56/76), which was significantly higher than those of other methods(P ＜0. 05). Sigmoid sinus anomaly was the most frequent finding in patients with PT, accounting for 66. 21% (96/145). The incidence of sigmoid sinus anomaly was higher in PT than in NPT (291/870,33.45% ;χ2 =56. 537 ,P ＜0. 01). The fast imaging employing steady-state acquisition (FIESTA) sequence was the best examination method in displaying the vessel within the internal auditory canal (42/42,100%).Conclusions High jugular bulb and sigmoid sinus anomaly were the most frequent abnormal findings of temporal bone in patients with tinnitus. Enhanced HRCT was the choice of modality in patients with PT.Plain HRCT was recommended for NPT. FIESTA sequence was the best in the evaluation of the vessel within the internal auditory canal.

Objective To explore DSA findings curative measures and effects of bronchial arterial embolization(BAE)of bronchiectasis with massive hemoptysis. Methods 35 patients with massive hemoptysis due to bronchiectasis were performed selective bronchial arterial DSA and BAE referring to image data of chest plain film and CT. Embolic materials were polyvinyl alcohol(PVA)and/or gelatinum sponge particles. Curative effects were followed-up for 3 months to 3 years. Results ①DSA revealed bronchial artery as being the only abnormal vessel accounted for 74.3%,bronchial artry combined with nonbronchial systemic artery as 22.9% and only non-bronchial artery involved 2.9%. Abnormal vessel number was 1 -5(mean 1.8) per case. Direct and indirect bleeding sign was displayed as 25.7% and 100% respectively. ②Curative and embolization effects were shown as 61 target vessels of 34 patients being embolized and total effective rate reaching 85.3%; of which 16 cases were adopted super-selective technique,1 case was failure of stopping bleeding for two times within 3 days,4 cases recurred within 3 months and 2 cases recurred over 3 months; with recurrent rate of 20.6%,but no serious complications such as spinal cord injury. Conclusions DSA examination and selective BAE of bronchiectasis with massive hemoptysis could provide high positive angiographic features and reliable curative effect.

Objective To study the imaging features and adequate interventional therapy of the diffuse type hepatic cellular carcinoma(HCC).Methods Fourteen patients with the diffuse type HCC underwent hepatic angiography and the adequate interventional therapy by TAI or TAE according to imaging appearances,blood supply and function of liver.Results ①Imaging appearances:the most common appearances of fourteen patients with the diffuse type HCC on DSA and CT included:tumor blood vessel was extensive and increased,tumor stain was extensive in left and right liver leaf(such as grain,small spot ,nodule shadows or low density area),liver enlarged obviously with liver cirrhosis,portal vein tumor thrombus,arteriopotal shunt and widespreadly scattered iodized oil,et al.②Therapeutic effect:the mean survival time of fourteen patients was 3 months,the longest survival period was 10 months and the shortest one was olny 15 days.Conclusion ①The specific appearances of the diffuse type HCC are diffuse small spot-like,frosted glass-like,double orbit-like and big liver-like.②The interventional therapeutic effect and prognosis of the diffuse type HCC are the worst than that of other type primary hepatic carcinoma.Selecting adequate interventional therapeutical plan can obviously prolong survival time of the patient.

Objective To study angiography features and clinical significance of "multiple tumor feeding embolization".Methods Twelve patients with pelvic tumor were reviewed retrospectively.The lesions included fibrosarcoma(n=1),chondrosarcoma(n=2),osteosarcoma(n=2) and metastatic tumor(n=7).Results Angiography features were:(1)multiple origin and branch of tumor-feeding vessels.(2)large vascular mass with dense tumor stain.(3)larger size of tumor stain comparing with that of bone destraction.After treatment,symptom relief and tumor shrink were obviously using"the multiple tumor-feeding embolization".Conclusion Angiography features of pelvic tumor are great value in guiding the clinical therapy.