Aim To investigate the combined pharmacokinetic-pharmacodynamic(PK-PD) model of irbesartan in healthy Chinese male volunteers. Methods Eighteen healthy male volunteers received 300 mg irbesartan tablet orally. The plasma drug concentration (C_p) was determined by HPLC and pharmacologic effects, including SBP, DBP and HR, were measured simultaneously. The pharmakinetic and PK-PD model parameters were calculated. Results The pharmacokinetic profiles were best fitted a two-compartment open model. There was a hysteresis loop between effects and plasma concentrations. The relationship between effects and effect compartment concentrations of drugs could be represented by the Sigmoid-E_ max model. Conclusion We successfully eatablished the PK-PD model of irbesartan in healthy male volunteers. These findings may provide a more rational basis for patient-specific dosage individualization.

Objective To investigate the cell cycle of airway smooth muscle cells(ASMC) in asthmatic rats with airway remodeling and to explore a new method for the prevention and treatment of asthma.Methods The asthmatic rat models were established.The pathologic changes of inner airway wall and ASMC were determined by observing and analyzing the lung tissue sections stained with HE,and the cell cycle distribution of ASMC were analyzed by flow cytometry.Results The inner airway wall and smooth muscle layer were much thicker in rats of asthma group than those of control group(P

Aim To study pharmacokinetics and bioavailablity of domestic penicillin V dispersion tablet in healthy volunteers. Methods According to the crossover design, each volunteer in two groups was orally given a single dose ( 0.75 g ) of domestic penicillin V dispersion tablet or imported penicillinV tablet alternately and the plasma concentrations were determined by RP HPLC. The pharmacokinetic parameters were obtained by using ATPK program and calculated on the basis of open single compartment model. Results After a single oral dose( 0.75 g ), the t 1/2(ke) was ( 0.75 ? 0.10 ) h and ( 0.70 ? 0.14 ) h ,the c max was( 8.44 ? 2.40 ) mg?L -1 and ( 8.75 ? 3.04 ) mg?L -1 at ( 0.56 ? 0.11 ) h and ( 0.63 ? 0.17 ) h and AUC 0～4 was( 8.44 ? 2.40 ) mg?h?L -1 and ( 8.75 ? 3.04 ) mg?h?L -1 for two formulations, respectively. Relative bioavailability of domestic penicillin V dispersion tablet was ( 90.50 ? 8.84 )%. Conclusion The result shows that the two formulations are bioequivalent.

AIM: To evaluate effects of diltiazem on platelet hyperreactivity in situations associated with endothelial injury and their possible relationship to cytosolic calcium concentration. METHODS: Blood samples were collected at 7 time points from 35 patients undergoing percutaneous transluminal coronary angioplasty (PTCA) who received combined diltiazem and aspirin/ticlopidine therapy or aspirin/ticlopidine therapy alone. Platelet expression of glycoprotein Ⅱb/Ⅲa and cytosolic calcium concentration were measured, respectively, by whole blood flow cytometry and fluorospectrophotometry. The effects of diltiazem of different concentrations on expression of glycoprotein Ⅱb/Ⅲa were also studied in vitro in blood samples from patients with chronic stable angina. RESULTS: Of the two treatments, aspirin/ticlopidine therapy did not prevent an acute increase of expression of glycoprotein Ⅱb/Ⅲa 5 minutes and 10 minutes after first inflation and 10 minutes after PTCA, whereas combined diltiazem and aspirin/ticlopidine therapy had a significant inhibitory effect. In the group receiving aspirin/ticlopidine therapy, there was a short-term elevation of platelet [Ca~(2+)]i immediately following PTCA which was significantly reduced by diltiazem treatment. Expression of glycoprotein Ⅱb/Ⅲa was significantly inhibited in vitro by diltiazem in the concentration of 200 ?g/L or higher, but not 50 ?g/L. CONCLUSIONS: Combined diltiazem and aspirin/ticlopidine therapy significantly inhibited platelet activation that continued in the presence of conventional aspirin/ticlopidine treatment. Antiplatelet effects of diltiazem were probably a consequence of reduction of platelet [Ca~(2+)]i and may only be achieved in higher than therapeutic concentrations. [

Adult ; Aorta, Thoracic ; injuries ; Coronary Vessels ; injuries ; Humans ; Male ; Tomography, X-Ray Computed

Objective To evaluate the bioequivalence of domestic and imported terazosin hydrochloride tablets after single oral dose .Methods It was a single center ,randomized ,open ,cross-over trail design ,21 subjects were fasting oral adminis-tered of 2 mg domestic and imported terazosin hydrochloride tablets in different periods ,venous blood 4 ml were collected in different time points before and 60 h after administration ,plasma concentration of terazosin was determined by LC-MS/MS . Results The main pharmacokinetic parameters of domestic and imported terazosin hydrochloride tablets were as follows :t1/2 :(13.2± 2.39)hvs(12.5±1.93)h,tmax :(1.01±0.83)hvs(1.08±0.69)h,Cmax :(40.1±10.6)ng/mlvs(37.3± 9 .57) ng/ml;AUC0- ∞ :(428 ± 82 .1) ng · h/ml vs (426 ± 85 .2) ng · h/ml .The relative bioavailability of domestic terazosin hydrochloride tablets was (101 .2 ± 14 .7)% .90% CI of domestic and imported terazosin hydrochloride tablets AUC0-t and Cmax geometric mean ratio fell between 80% -125% .Conclusion The domestic tablets are bioequivalent to the imported tablets .

Objective:This study aimed at analyzing risk factors associated with surgical outcomes of neonatal total anomalous pulmonary venous connection (TAPVC) in our center.Methods:A total of 105 neonates who underwent surgical repair for TAPVC from January 1st, 2009 to January 1st, 2018 were retrospectively analyzed. The anatomical types of TAPVC included supracardiac 42(40%, 42/105), cardiac 21(20%, 21/105), infracardiac 36(34.3%, 36/105), and mixed 6(5.7%, 6/105). The Cox proportional hazards analysis was used to analyze the risk factors related to postoperative pulmonary venous obstruction (PVO) and mortality. Kaplan- Meier analysis was used to analyze the overall survival rates. Results:Twenty-six patients (24.8%, 26/105) were diagnosed with preoperative PVO. The 30-day, 1 year, and 5 years survival rate was 92.4%, 86.7%, and 86.7% respectively. Postoperative PVO occurred in 17 patients (16.2%, 17/105). Preoperative acidosis, low surgical weight, prolonged duration of cardiopulmonary bypass time, increasing postoperative central venous pressure (CVP), and reoperation were risk factors associated with mortality. Preoperative acidosis ( P<0.001), prolonged duration of cardiopulmonary bypass time ( P<0.001), and increasing postoperative CVP ( P=0.005) were independent risk factors for mortality. Mixed TAPVC, preoperative acidosis, low surgical age, prolonged cardiopulmonary bypass time, postoperative pulmonary arterial hypertension were risk factors associated with postoperative PVO. Prolonged cardiopulmonary bypass time ( P=0.029), postoperative pulmonary arterial hypertension ( P<0.001), and mixed TAPVC ( P=0.017) were independent risk factors associated with postoperative PVO. Conclusion:The surgical outcomes of neonatal TAPVC in our center were acceptable, with low mortality rate and incidence of PVO. However, neonates with preoperative acidosis, prolonged duration of cardiopulmonary bypass time, and increased postoperative CVP had a poor prognosis. Patients with mixed TAPVC were at increased risk for postoperative PVO.

ObjectiveTo form a questionnaire of high reliability and validity on mate preferences of postgraduates in military academy. MethodsIn December 2020， full-time postgraduates of a military academy were randomly selected as research objects， and their mate preferences were investigated via a self-compiled open-ended questionnaire. The item screening and expert consultation were carried out to compile an initial questionnaire on mate preferences of the postgraduates in military academy， and the questionnaire survey was conducted on 89 postgraduates in the military academy. Then the item analysis and exploratory factor analysis were performed to test the questionnaire， and the reliability and validity of the questionnaire were tested by calculating Pearson correlation coefficient， Cronbach's α coefficients and split-half coefficient. ResultsThe questionnaire on mate preferences of postgraduates in military academy has been formed， which consisting of 4 factors （intrinsic quality， personal ability， external conditions and quality of life） and 25 items was formed. The correlation coefficient between the total score of the questionnaire and the score of each factor ranged from 0.739 to 0.864， Cronbach's α coefficient of total score and each factor ranged from 0.723 to 0.926， and the split-half coefficient was between 0.682 and 0.899. ConclusionThe compiled questionnaire on mate preferences of postgraduates in military academy has good credibility and validity， and can be used as a tool to collect the data of psychological marriage and love on the mate preferences of postgraduates in military academy.

Objective    To characterize surgical outcomes of supra-cardiac total anomalous pulmonary venous connection (TAPVC), investigate risk factors for postoperative death, and explore informed LASSO machine learning methods to solve "small sample size problem" in research of rare congenital heart diseases. Methods    A retrospective analysis of 241 patients with supra-cardiac TAPVC who underwent surgical repair in Guangdong Provincial People's Hospital from 2009 to 2019 was conducted, including 179 males and 62 females with a median surgical age of 71 (33, 232) d. Detailed clinical data of the postoperative death-related factors were extracted. Univariable Cox proportional hazard models were used to initially screen potential risk factors for postoperative death. Factors with P鈮?.05 were retained. To solve the limitation of small sample size and the "P>n" problem, we proposed a novel LASSO method for conducting multivariable Cox regression analysis that was capable of bringing in findings of related studies to improve analysis power and to reduce false-negative findings. Results 聽 聽Univariable Cox analyses showed several potential clinical risk factors, among which highly significant factors (P<0.001) included: surgical weight鈮?.5 kg (HR=16.00), main pulmonary artery diameter (HR=0.78), prolonged cardiopulmonary bypass time (HR=1.21), aortic block time (HR=1.28), and postoperative ventilator-assisted time (HR=1.13/d). LASSO multivariable analysis revealed that independent risk factors for postoperative death included cardiopulmonary bypass time (aHR=1.308/30 min), age (aHR=0.898), postoperative ventilator-assisted time (aHR=1.023/d), weight鈮?.5 kg (aHR=2.545), right vertical venous return (aHR=1.977), preoperative pulmonary venous obstruction (aHR=1.633) and emergency surgery (aHR=1.383). Conclusion 聽 聽Our proposed informed LASSO method can use previous studies' results to improve the power of analysis and effectively solve the "P>n" and small sample size limitation. Cardiopulmonary bypass time, surgical age, postoperative ventilator-assisted time, weight, right vertical venous return, preoperative pulmonary venous obstruction, and emergency surgery are risk factors for postoperative death of supra-cardiac TAPVC.