OBJECTIVE: To evaluate the similarity of the mean drug dissolution or release curves by the experimental model of reformatory Weibull. METHODS: Three drugs were taken as the model drugs. With the fiber-optic in site dissolution testing equipment(FODT), the percentages of accumulated dissolution/release changing with time of the control and test preparations of every drug were respectively monitored. The mean percentages were calculated and the dissolution/release curves were drawn. The data were fitted by the reformatory Weibull model. The fitted parameters c, Ti, b, a, and the 95% confidence intervals of every parameters were extracted. The similarity of the mean drug dissolution curves between the control and test preparations was evaluated by the fitted parameters and observation of the dissolution curves. RESULTS: For the sustained-release preparations, there was no significant difference in the parameters c, Ti, b, and a of the test and control samples, and the mean drug release curves were similar. As for the non-modified preparations, whether the dosage forms of the test and control preparations were the same or not, there existed differences in the parameters fitted by the method of reformatory Weibull model. CONCLUSION: The modified method of reformatory Weibull model can be applied in the evaluation of similarity of drug dissolution behavior with satisfactory goodness-of-fit and quantitative result.

Objective To evaluate roles of color doppler echocardiography(CDE)and angiocardiography(ANGI)in diagnosis of children's combined with congenital heart diseases(CHD).Methods From Jan.2006 to Jun.2008,31 children with combined with CHD underwent not only CDE but also ANGI.Of those,18 cases were subjected to surgical operation.Main diagnosis and concomitant cardiovascular malformations derived from CDE and ANGI,operative findings as well,were compared.Results In 18 cases undergoing surgery,diagnosis of 15(83.33%)cases from CDE and 17(94.44%)cases from ANGI were in line with the operative findings.Of intracardiac malformations,diffe-rences between CDE and ANGI were:CDE diagnosed 1 case with pulmonary atresia /ventricular septal defect(PA/VSD)as persistent truncus arteriosus(PTA),2 cases with tetralogy of Fallot(TOF)as PA/VSD by mistake,and 1 case with partial anomalous pulmonary venous connection(PAPVC)was suspected by CDE but missed by ANGI,all above mentioned confirmed by sugery;except main diagnosis,CDE missed atrial septal defect(ASD),anomalous origin of right coronary artery and single left coronary for 1 case,respectively.In diagnosing extracardiac abnormal structures:1 case of interrupted aortic arch(IAA)was suspected by CDE but diagnosed and classified by ANGI;for double aortic arch(DAA),pulmonary arteriovenous fistula(PAVF),patent ductus arteriosus(PDA)and absence of right pulmonary artery,1 case of each was missed by CDE;furthermore PDA reported by CDE but not found by ANGI in 4 cases with PA/VSD.Conclusions The diagnostic difference between CDE and ANGI mainly lies in extracardiac malformations including coronary arteries.In diagnosing combined CHD,combination of CDE and ANGI can improve accurate rate.J Appl Clin Pediatr,2009,24(1):44-45

OBJECTIVETo study the distribution of coagulation factor V(FV), VII(FVII) gene polymorphisms in Chinese Han population and the association of the polymorphisms with coronary heart disease(CHD).

METHODSGenotypes of FV FVII were typed in 234 CHD patients and 210 controls by polymerase chain reaction-restriction fragment length polymorphism. Selected coronary angiography was performed in 234 CHD patients.

RESULTSFVII allelic frequencies of R,Q and H7,H6 were 94.6%, 5.6%, 70.3%, 29.7% and 91.9%, 8.1%, 60.9%, 39.1% in CHD group and control group respectively. Genotype distribution was in accordance with Hardy-Weinberg equilibrium. There was no significant difference in frequencies of allele and genotype in R353Q or HVR4 polymorphisms between CHD group and control group. The distribution of allele and genotype in R353Q was of significant difference between non-myocardial infarction subgroup and myocardial infarction subgroup (chi2 = 4.711, P<0.05, OR=0.37,95% CI: 0.15-0.94). However, HVR4 polymorphism was not found to be of significant difference within two group (chi2 = 0.142, P>0.05). There was no FV Leiden mutation in all the CHD patients and normal controls.

CONCLUSIONThe Q allele of the R353Q polymorphism of the FVII gene may be a protective factor against myocardial infarction.

Aged ; China ; Coronary Disease ; genetics ; pathology ; DNA ; genetics ; Factor V ; genetics ; Factor VII ; genetics ; Female ; Gene Frequency ; Genotype ; Humans ; Male ; Middle Aged ; Polymerase Chain Reaction ; Polymorphism, Genetic

Objective To understand the clinical distribution and antimicrobial resistance of Enterococcus spp.isolated from blood culture.Methods Enterococcus spp.isolated from blood culture specimens of hospitalized patients between January 2012 and December 2016 was analyzed,antimicrobial susceptibility testing results were analyzed.Results A total of 139 strains of Enterococcus spp.were isolated,including 78 strains of Enterococcus faecium (E.faecium),60 Enterococcus faecalis (E.faecalis),and 1 Enterococcus avium (E.avium),accounting for 56.11％,43.17％,and 0.72％ respectively;56.83％ of patients were ＞60 years and 17.27％ were ≤28 days.The main department sources of strains were intensive care unit and neonatal department,accounting for 34.53％ and 18.70％respectively.There was only 1 strain of E.avium,which was isolated from neonatal department.Resistance rates of E.faecium to penicillin,ampicillin,levofloxacin,ciprofloxacin,moxifloxacin,and nitrofurantoin were all higher than E.faecalis(all P＜0.05),while resistance rate to tetracycline was lower than E.faecalis(P =0.001).Resistance rates of E.faecium to vancomycin and linezolid were 2.56％ and 6.41％ respectively;resistance rates of E.faecalis to vancomycin and linezolid were 0 and 3.33％ respectively.Conclusion E.faecium and E.faecalis are the main Enterococcus spp.isolated from blood culture,most are isolated from the elderly patients and newborns.Resistance rates of E.faecium to most antimicrobial agents are higher than E.faecalis,resistance rates of E.faecium and E.faecalis to linezolid are both higher than resistance rates to vancomycin,key monitoring needs to be continued.

Objective To enhance the diagnosis of cerebral infarction of the hematopathy patient by analyzing its causes and MRI manifestations.Methods Totally 36 hematopathy patients with cerebral infarction from April 2010 to November 2015 had their data discussed retrospectively on involved vessel,anatomic distribution and MRI manifestations.Results Of the 36 patients,12 ones had only an artery involved in and 24 ones had multi arteries affected,31 ones had multi cerebral infarction foci and 5 ones had single focus.The foci had high or slighdy high signals in T2WI and very high signals in DWI,and there were no enhancement or only gyrus-like enhancement around the foci found by enhanced scan.Conchusion MRI gains advantages over CT when used to diagnose and find the hematopaty patient with cerebral infarction,when it has to be differentiated with cerebral early infection and parenchymal infiltration.It's suggested that the hematopathy patient has to undergo MRI examination in case central nervous system symptoms especially cerebral infarction occur.

OBJECTIVETo evaluate factors for predicting ventricular arrhythmia, the clinical effect of drugs on patients with catecholaminergic polymorphic ventricular tachycardia (CPVT), and their long-term outcomes.

METHODSSix patients diagnosed with CPVT underwent a series of electrocardiograms and 24-hour Holter monitoring. β-blockers were recommended for all patients, while some patients were also prescribed propafenone and 1 patient underwent catheter-based renal sympathetic denervation (RDN). The characteristics of electrocardiogram, arrhythmia and long-term outcomes were monitored.

RESULTSSyncope episodes did not occur any longer in 1 patient on β-blocker, but recurred in 3 other patients and 2 patients died (one due to his cessation of metoprolol for 3 months). Inverted and/or bifid T waves and abnormal U wave were observed in the precordial leads. T wave alternans was observed in 4 patients in the precordial leads. These abnormal electrocardiogram features disappeared or diminished with β-blocker treatment. All spontaneous episodes of ventricular tachycardia occurred prior to sinus tachycardia and frequent polymorphic premature ventricular contractions.

CONCLUSIONSBifid and/or inverted T waves, T wave alternans and abnormal U waves together with sinus tachycardia and frequent premature ventricular contractions are indicator for predicting ventricular arrhythmia and assessing the effect of β-blockers. Compliance with β-blocker treatment is a strong indicator of outcome.

Adolescent ; Adrenergic beta-Antagonists ; therapeutic use ; Adult ; Child ; Electrocardiography ; Electrocardiography, Ambulatory ; Female ; Humans ; Male ; Tachycardia, Ventricular ; drug therapy ; physiopathology ; Treatment Outcome

Objective To describe the clinical features of 6 patients with catecholaminergic polymorphic ventricular tachycardia.Methods Clinical data including signs and symptoms,electrocardiograms,Holter monitoring electrocardiograms and echocardiography was analyzed.Definite diagnosis was made based on the mutations of RYR2 and CASQ2.Results From July 2002 to March 2010,6 consecutive patients referred to our center because of syncope [4 males,mean age (13.0 ± 4.2) years]were diagnosed with CPVT by clinical evaluation and genetic testing.Their electrocardiograms showed T waves with notch or bimodal and tall U waves in right chest leads.There was no J wave,no ST-segment deviation,no prolongation or shortening of QT interval.We captured the so-called "bidirectional and (or)polymorphic ventricular tachycardia(bVT and pVT)" in 2 out of 6 patients by ECG.in 5 out of 6 patients by24-hours Holter monitor,in 3 out of 6 patients by exercise test.All patients received β blockers and no syncope occurred during the 3 months follow-up after discharge from hospital.Conclusions CPVT is an inherited cardiac channelopathy characterized by syncope and (or) sudden death relatived to motion.The ECG shows T wave alteration and tall U wave in right chest leads.The mode of it's onset is bVT and (or)pVT,and can be captured by Holter easily.β blocker is a safe and effective remedy for suppressing it's attack.

OBJECTIVETo investigate the relationship between methylation of the CDH1 gene promoter on the expression of E-cadherin and β-catenin, and to evaluate the correlation with clinicopathological characteristics of the colonic carcinoma.

METHODSMethylation specific PCR (MSP) was used to detect CDH1 gene promoter methylation in the cancer tissue, adjacent tissues and normal tissues in 68 patients. The expression of E-cadherin and β-catenin was determined by immunohistochemistry staining.

RESULTSThe positive rate of CDH1 gene promoter methylation was 32.4% in adjacent tissues and 57.4% in cancer tissue, while no detectable methylation was found in all the normal tissues. The difference was statistically significant. The positive rate of E-cadherin was 92.6% in the normal tissues, 66.2% in the adjacent tissues and 44.1% in the cancer tissues. In all normal tissues, β-catenin was expressed only at the cellular membrane but not in the cytosol or nucleus, while the expression of β-catenin was present in the cytosol or nucleus in 29.4% of the adjacent tissues and 50.0% of the cancer tissues. The positive rate of CDH1 gene promoter methylation was negatively correlated with E-cadherin expression(r=-0.312, P=0.01) and positively correlated with β-catenin cytosolic/nucleus expression(r=0.309, P=0.018). The differentiation and metastasis of colonic carcinoma were associated with the aberrant expression of E-cadherin, β-catenin, and methylation of CDH1 promoter (P<0.05).

CONCLUSIONCDH1 gene promoter methylation may lead to aberrant expression of E-cadherin and β-catenin in colonic carcinoma, and may play an important role in promoting the invasion of tumor.

Adult ; Aged ; Aged, 80 and over ; Cadherins ; genetics ; metabolism ; Colonic Neoplasms ; genetics ; metabolism ; DNA Methylation ; Female ; Humans ; Male ; Middle Aged ; Promoter Regions, Genetic ; beta Catenin ; genetics ; metabolism

OBJECTIVETo investigate the impact of penile surgery on the erectile function of the patient and to evaluate the role of small-dose vardenafil in restoring the impaired penile erection.

METHODSSixty cases of penile cavernosum surgery were equally and randomly divided into a vardenafil and a control group, the former treated 5 - 7 days after surgery with 10 mg vardenafil every other day, while the latter given vitamin E at 100 mg once a day, both for 12 weeks. The penile erectile function of the patients was evaluated with the IIEF-5 questionnaire before surgery and at 3 and 6 months after vardenafil medication.

RESULTSThe mean IIEF-5 scores of the vardenafil group were 18.83 +/- 2.98 and 20.13 +/- 2.98 at 3 and 6 months after vardenafil medication, significantly higher than 14.21 +/- 3.62 before surgery (P > 0.05), while that of the control group was significantly decreased at 3 months as compared with the preoperative score (13.38 +/- 2.82 versus 15.80 +/- 3.02, P < 0.05). The vardenafil group showed the highest IIEF-5 score after surgery (P < 0.05).

CONCLUSIONLong-term administration of small-dose vardenafil after penile surgery helps to restore and maintain penile erectile function.

Adult ; Erectile Dysfunction ; drug therapy ; Humans ; Imidazoles ; administration & dosage ; therapeutic use ; Male ; Middle Aged ; Penile Erection ; Penis ; surgery ; Piperazines ; administration & dosage ; therapeutic use ; Postoperative Period ; Recovery of Function ; Sulfones ; administration & dosage ; therapeutic use ; Treatment Outcome ; Triazines ; administration & dosage ; therapeutic use ; Vardenafil Dihydrochloride ; Vasodilator Agents ; administration & dosage ; therapeutic use

OBJECTIVETo provide scientific basis data for revising the national hygiene criteria of "Classification of hazard conditions of productive dust" (GB5817-86).

METHODSThe data of the retrospective study and the field survey data were analyzed with correlation and regression analysis. The product of total dust concentration of respiratory exposure (mg/m(3)), total ventilation during exposure (m(3)/d per psrson), and level of free SiO(2) in dust (%) was the respiratory exposure dose of free SiO(2) (mg per day per person) which was used as dose criteria value of classification of hazard degree of dust.

RESULTSUsing free SiO(2) exposure dose and the dose-effect relationship, the hazard degrees of the dust were divided into 5 grades: 0, I, II, III, IV (0 - 8.0, 8.1 - 12.0, 12.1 - 16.0, > 24.1 mg per day per person).

CONCLUSIONThe exposure dose of free SiO(2) is closely related to the pathogenesis of silicosis. Using the exposure dose of free SiO(2) as the classification indicator of hazard degree of dust is reliable, simple and easy to execute.

China ; Dust ; analysis ; Hazardous Substances ; analysis ; Humans ; Lung ; diagnostic imaging ; pathology ; Occupational Exposure ; standards ; Radiography ; Retrospective Studies ; Safety Management ; standards