Objective:To establish the drug release determination conditions and method for methylphenidate hydrochloride bipolar controlled release osmotic pump tablets. Methods: The drug release of the tablets was determined by HPLC using a Diamonsil C18 (250 mm × 4. 6 mm, 5 μm) column with acetonitrile-KH2 PO4 (0. 02 mol·L-1 ,and pH was adjusted to 3. 0 by 1% H3 PO4 solution) (30∶ 70) as the mobile phase at a flow rate of 1 ml·min-1 , the column temperature was 35 ℃ and the injection volume was 20 μl. The effects of release medium, release apparatus and rotation speed on the release of methylphenidate hydrochloride bipolar controlled release osmotic pump tablets were studied as well. Results:The established drug release determination method had a good linear rela-tionship within the range of 1. 0-24. 0 μg·ml-1(r=0. 999 5), and the average recovery was 100. 5%(RSD=1. 58%, n = 6). Un-der the conditions of 900 ml pH 3. 0 phosphate buffer solution as the release medium and the rotation speed of 50 r·min-1 , the drug was quickly released in 0-2h, and then the release behavior was complied with a zero-level model in vitro in 2-10h with the release e-quation of Q=5. 505t+44. 221(r=0. 994 5). Conclusion:The method is simple, accurate and reliable, and suitable for the quality control of methylphenidate hydrochloride bipolar controlled release osmotic pump tablets.

The separation,purification and activity determination of basic fibroblast growth factor (bFGF) with nucleic acid molecular hybridization was described and the changes of bFGF in lung injury treated with prostacy-clin were observed.It was found that bioactive bFGF and bFGF-mRNA could only be found in the injured lung tissues but not in the normal lungs.Administration of prostacyclin could slightly elevate the activity of bFGF and signficantly increase the level of bFGF-mRNA.The findings of this study suggest that there is an increase of bFGF level after lung injury,prostacyclin can influence the expression of bFGF,and bFGF plays an important role in the repair of the injured lung tissues.

Objective To study the expression law of zinc finger protein A20 mRNA of mouse liver tissues in the process of trauma with lipopolysaccharide (LPS) infection. Methods A total of 95 healthy mice (either sex, from Kunming, Yunnan province) with a mean body weight of 21 g (18-24 g) were randomized into 4 groups: control, trauma only (Group A), LPS only (Group B) and trauma plus LPS (Group C). The models with closed fracture of bilateral spines as well as endotoximia were made. The expression characteristics of zinc finger protein A20 mRNA of liver tissues were measured by reverse transcription-polymerase chain reaction (RT-PCR) and all result data expressed as total gray ratio of A20 mRNA to GAPDH mRNA (?s). Results In the control group, the A20 mRNA expressed at a low level. There was low expression of zinc finger protein A20 in the Group A at various time points, with no significant difference compared with the control group. After LPS infection, the expression of A20 mRNA in the Group B was elevated more obviously than that in the control group at 0.5 hour, reached peak during 0.5-2 hours and decreased after 2 hours. But expression of A20 mRNA at each time point was higher in the Group B than that in the Group A. In the Group C, after LPS infection, the expression of A20 mRNA was elevated more significantly than that in other two groups 0.5 hour, reached the highest level during 0.5-2 hours, much higher than that in the Group B (P

Objective To discuss the value of the mammography in the diagnosis of ductal carcinoma in situ (DCIS) and guidelines ofthe operation.Methods 107 pathologically proved DCIS were retrospectively reviewed.Results There were 62 microcacifications(57.9%),the range of microcacifications was varied , of them,13 were masses or local compact with microcacifications ; 17 were localized infiltration and bad structure (15.9%);20 were masses (18.7%) ;1 papillae enhancement (0.9%),7 were normal(6.5%).Conclusion Multiplicity microcacifications are the most frequently appearance of X-ray in DCIS;mammography could find the early microcarcinoma and the early carcinoma , especially the DCIS ; mammography could exactly reflect the multifocus , it is of value in confirming the range of the operation.

Objective To explore the effect of different additional filters on radiation dose and image quality in digital mammography.Methods Hologic company's Selenia digital mammography machine and the post-processing workstations and 5 M high resolution medical monitor were used in this study.Mammography phantoms with the thickness from 1.6 cm to 8.6 cm were used to simulate human breast tissue.The same exposure conditions,pressure,compression thickness,the anode were employed with the additional filters of Mo and Rh under the automatic and manual exposure mode.The image kV,mAs,pressure,filter,average glandular dose (AGD),entrance surface dose (ESD),signal-to-noise ratio (SNR),contrast-to-noise ratio (CNR) and image score according to ACR criteria were recorded for the two additional filters.Paired sample t test was performed to compare the indices of Mo and Rh groups by using SPSS 17.0.Results AGD and ESD of Rh and Mo group were both higher with the increase of the thickness of all the phantoms.AGD,ESD and their increased value of Rh filter(1.484 ± 1.041,7.969 ± 7.633,0.423 ± 0.190 and 3.057 ± 2.139) were lower than those of Mo filter(1.915 ± 1.301,12.516 ± 11.632,0.539 ±0.246 and 4.731 ± 3.294),in all the phantoms with different thickness (t values were 4.614,3.209,3.396 and 3.605,P ＜0.05).SNR,CNR,and image score of Rh and Mo group both decreased with the increase of the thickness of all the phantoms.There were no statistical difference (P ＞ 0.05).Conclusions Compared with Mo filter,Rh filter could reduce the radiation dose,and this advantage is more obvious in the thicker phantom when the same image quality is required.

Objective To characterize the features of breast mucinous carcinoma on T2WI, dynamic contrast-enhanced MR imaging (DCE-MRI) and diffusion weighted imaging (DWI) and correlate the MR features with histopathology. Methods MR imaging in 8 women (aged 33--65 years old) with mncinous carcinoma of the breast verified histopathologically was performed on 1.5 T scanner with T1WI, FS T2 WI, 3D DCE-MRI using volume imaging for breast assessment(VIBRANT) sequence, DWI with b value of 500 and 1000 s/mm2 by single-shot EPI sequence. According to the lexicon of BI-RADS-MRI designed by ACR, the MR findings were retrospectively studied, including morphology, signal intensity on T1WI and FS T2WI, mass enhancement, the patterns of dynamic enhancement curve, and the mean ADC on DWI. The pathologic diagnosis was made according to the standard criteria by the World Health Organization Classification of Tumors. Results Five patients were pure mucinous carcinoma and 3 patients were the mixed. The amount of mucus ranged from 60% to 90%. All 8 tumors presented as a mass on MRI with low signal intensity on T1WI, high or strongly high signal intensity on FS T2WI and high signal on DWI. The tumor size ranged from 1.3 to 3. 2 cm in diameter. Five tumors showed rim enhancement in early phase and the central part was gradually enhanced in delayed phase. One tumor presented slightly heterogeneous enhancement. Two tumors showed progressively heterogeneous enhancement. The mean ADC values of tumor were (2.41±0.28) ×10-3 mm2/s with b value of 500 s/mm2 and (2.06 ±0. 14) × 10-3 mm2/s with b value of 1000 s/mm2, and higher than that of the normal breast tissue [ ( 1.71 ±0. 32) × 10-3 and ( 1.43 ± 0. 24) × 10-3 mm2/s]. Conclusions The MR features of breast mucinous carcinoma on T1WI, DCE-MRI, and DWI are different from that of invasive ductal carcinomas and may reflect its distinct histological type. The combination of these MR sequences may lead to a pre-operative diagnosis of this tumor.

Objective To compare the two-dimensional (2D) and three-dimensional (3D) shear wave elastography (SWE) technology in the diagnosis of early stage breast cancer.Methods 84 patients (94 breast lesions) with breast disease confirmed by pathological examination were enrolled from December 2014 to December 2016.All patients underwent 2D and 3D color Doppler ultrasound and the relevant SWE examinations.The optimal maximum and mean elastic modulus of 2D and 3D SWE for diagnosing the benign and malignant breast lesions were obtained by the receiver operating characteristic curve (ROC).Based on the results of pathological examinations,the sensitivity,specificity and accuracy of 2D SWE and 3D SWE in benign and malignant breast lesions diagnosis were evaluated and compared.Results The optimal maximum and mean elastic modulus of 2D SWE for diagnosing the benign and malignant breast lesions were 98.82 kPa and 43.88 kPa respectively,while the corresponding modulus of 3D SWE were 102.54 kPa and 53.87 kPa.The sensitivity of 2D SWE and 3D SWE in breast cancer diagnosis was 89.5％ and 86.3％ respectively,and the difference was not statistically significant (P＞0.05).The specificity and the accuracy of 2D SWE in breast cancer diagnosis were 95.3％ and 92.7％ respectively,which was significant higher than 83.9％ and 85.1％ of 3D SWE,and the differences were statistically significant (all P＜O.05).Conclusions The efficiency of 2D SWE examination is significantly higher than the 3D SWE in benign and malignant breast lesions diagnosis,which can provide a reliable diagnostic basis and is worthy for clinical application.

Objective Understanding of red blood cell distribution width (RDW-CV),blood homocysteine (HCY),lipoprotein a [LP(a)] a merger with high blood pressure and high blood,coronary heart disease (CHD) relevance and explore its clinical application value in CHD.Methods 563 cases of patients with high blood pressure were enrolled,which divided into 62 cases of primary hypertension,501 cases of hypertension combined with coronary heart disease,according to the results of coronary angiography.141 normal cases were chosen as control group.Compared the three groups of RDW-CV,HCY and LP (a) level,the group of coronary artery disease was divided into Ⅰ,Ⅱ,Ⅲ and Ⅳ,and compared the RDW-CV level of each group,and the correlation between RDW and cardiac function was analyzed.Results ①Heart disease groups RDW-CV,LP (a) and HCY (13.25 ± 1.22％,17.82 ± 8.36 μmol/L,172.05 ± 122.32 mg/L) were higher than blood pressure groups (12.98 ± 0.57 ％,14.35 ± 6.36 μ mol/L,124.49 ± 75.88 mg/L) and normal control group (11.41 ± 2.85 ％,11.41 ± 2.85 μmol/L,71.07±27.55 mg/L,P＜0.05).②RDW-CV and HCY were positively correlated with the mental function classification (r=0.461,0.1970;P=0.000,0.032).③The area under the ROC curve was the order of the diagnostic value:HCY ＞LP(a) ＞RDW-CV.LP(a) sensitivity was 82.5 ％ and specificity was 31.7 ％.RDW-CV sensitivity was 48.8 ％ and specificity was 22.2 ％.Conclusion High levels of RDW-CV,HCY,and LP(a) were closely related to the occurrence of coronary heart disease;RDW-CV and HCY were related to the severity of coronary heart disease and cardiac function,and could be a potential biomarker for the development of cardiac function of coronary heart disease.

Objective To analyze the levels of serum lipoprotein (a)[Lp(a)]and homocysteine (CHY)in type 2 diabetes mellitus (T2DM)patients and todetermine the relationship between them and diabetic insulin resistance.Methods A total of 108 patients with T2DM and 50 healthy volunteers (control group)were studied.T2DM group according to the presence of kidney disease complications could be divided into simple diabetes group (SDM)in 48 patients with diabetic nephropathy (DN)group of 60 cases.Collected patients general data and determined two groups of glycosylated hemoglobin (HbA1c), low density lipoprotein (LDL),urea nitrogen (BUN),serum creatinine (SCr),urinary inhibition C (CysC),Lp(a)and HCY levels;Compared differences between groups and how they related to T2DM kidney disease,and the relationship between in-sulin resistance.Results ①Compared between three groups only the weight (NC group 60.1±10.34 kg,SDM group 67.2 ±11.38 kg,DN group 68.8±1.35 kg),the difference was statistically significant (F=0.457,P=0.035).②compared be-tween the three groups,the levels of HbA1c (F=3.421,P=0.013),LDL-C (F=2.963,P=0.041),BUN (F=4.637,P=0.031),SCr (F=2.369,P=0.024),CysC (F=3.697,P=0.011),Lp(a)(F=1.236,P=0.021),HCY (F=4.317,P=0.027)were increased significantly.③FPG,FINS and HOMA-IR in SDM group were 5.99±0.94 mmol/L,61.11±28.46 pmol/L and 2.93±1.97 respectively,FPG,FINS and HOMA-IR in DN group were 9.01±2.23 mmol/L,98.56±62.14 pmol/L and 4.34±2.74 respectively.Compared between the two groups,FPG (t=0.47,P=0.017),FINS (t=0.55,P=0.039),HOMA-IR (t=0.69,P=0.024)differences were statistical significance.④The Lp(a),HCY were significantly pos-itive correlation with HOMA-IR (r=0.761,P=0.044;r=0.840,P=0.021).Conclusion Lp(a)and HCY levels in serum associated with diabetic nephropathy,and insulin resistance.And the detection of serum Lp(a)and HCY has important sig-nificance for early detection of diabetic nephropathy.

Objective To investigate the readiness for hospital discharge of patients who had undergone spinal operation at West China Hospital, Sichuan University, to guide the medical care and health education. Methods A total of 164 patients after spinal operation who have readying to discharge were selected and investigated by General Information Questionnaire, Activity of Daily Life Scale and Readiness for Hospital Discharge Scale. Apply the Excel for data inputting, SPSS19.0 for statistical analysis and choose rate, x±s and so on for statistical description according to the types of data. Results Of all the 164 patients, 47 cases (28.7%) weren′t well prepared, 117 cases (71.3%) were well prepared;the score of
Readiness for Hospital Discharge Scale was (142.38±34.23 points and the average score of all the articles was (7.12±1.72) points. Conclusions The readiness for hospital discharge score of patients who had undergone a spinal operation at West China Hospital, Sichuan University is low and their readiness for hospital discharge is inadequate. Medical staff can improve the patients′readiness for hospital discharge by strengthening health guidance in order to promote the recovery of patients.