Repair of coronary artery ostium with a ring-shaped bovine pericardial patch.

As an approach to coronary artery ostial injury in type A aortic dissection and infective endocarditis, we describe a technique of coronary ostial repair using a ring-shaped bovine pericardial patch. The inner and outer rims of the patch were sutured to the involved coronary ostium (to close the ostial tear) and to the aortic wall (to cover the sinus), respectively. Four patients were successfully managed and computed tomographic coronary arteriogram at follow-up showed patent coronary ostia and arteries.

Simultaneous Determination of Celecoxib, Dezocine and Dexmedetomidine in Beagle Plasma Using UPLC-MS/MS Method and the Application in Pharmacokinetics.

Background: An efficient, fast and sensitive ultra high-performance liquid chromatography-mass spectrometry (UPLC-MS/MS) method for simultaneous determination of celecoxib (CEL), dezocine (DEZ) and dexmedetomidine (DEX) in beagle plasma were established.

Methods: The beagle dogs plasmawas precipitated by acetonitrile. The column was Acquity UPLC BEH C18 column and the mobile phase was acetonitrile-formic acid with gradient mode, and the flow rate was set at 0.

Effects of Dexmedetomidine on the Pharmacokinetics of Parecoxib and Its Metabolite Valdecoxib in Beagles by UPLC-MS/MS.

A sensitive and reliable ultraperformance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method was developed for the simultaneous determination of parecoxib and its metabolite valdecoxib in beagles. The effects of dexmedetomidine on the pharmacokinetics of parecoxib and valdecoxib in beagles were studied. The plasma was precipitated by acetonitrile, and the two analytes were separated on an Acquity UPLC BEH C18 column (2.

Machinability: Zirconia-reinforced lithium silicate glass ceramic versus lithium disilicate glass ceramic.

Diamond grinding used in dental adjustment of high-strength zirconia-reinforced lithium silicate glass ceramic (ZLS) and lithium disilicate glass ceramic (LDGC) is challenging in restorative dentistry. This study aimed to compare the machinability of ZLS and LDGC in diamond grinding in terms of machining forces and energy, debris, surface and edge chipping damage. Grinding experiments in simulation of dental adjustment were conducted using a computer-assisted high-speed dental handpiece and coarse diamond burs.

Greenhouse cultivation mitigates metal-ingestion-associated health risks from vegetables in wastewater-irrigated agroecosystems.

Wastewater irrigation can elevate metal concentrations in soils and crops and increase the metal-associated health risks via vegetable ingestion in arid and semiarid northwestern China. Here, we investigated the As, Cd, Cr, Cu, Ni, Pb, and Zn concentrations in four vegetable species from Dongdagou and Xidagou farmlands in Baiyin, Gansu, China. We evaluated the effects of irrigation type (Dongdagou: industrial wastewater; Xidagou: domestic wastewater) and cultivation mode (open field and greenhouse) on the vegetable metal concentration, metal partitioning, soil-to-plant bioconcentration factor (BCF), and the health risk index.

The Effect of Silibinin on the Pharmacokinetics of Ivabradine and N-Desmethylivabradine in Rats.

The objective of this work was to investigate the effect of orally administered silibinin on the pharmacokinetics of ivabradine and its active metabolite N-desmethylivabradine in rats. Twelve healthy male Sprague-Dawley rats were randomly divided into 2 groups: the control group (received oral 1.0 mg/kg ivabradine alone) and the combination group (1.

[Dynamic changes of the relationships between economic growth and environmental pressure in Gansu Province: a structural decomposition analysis].

Based on the ideology of macro environmental economics, a function of environmental pressure represented by pollutant emission was built, and the relative importance of the driving factors in the dynamic changes of the relationships between economic growth and environmental pressure in Gansu Province in 1990 - 2005 was analyzed by using structural decomposition analysis (SDA) model combining with 'refined Laspeyres' method. In the study period, the environmental pressure in the Province was mainly caused by the emission of waste gases and solids in the process of economic growth, and showed a rapid increasing trend at the late stage of the period. Population factor had less impact on the increase of this environmental pressure, while economic growth factor had obvious impact on it.

[Staged total cavopulmonary connection for complex congenital heart diseases].

Objective: To review the experience of staged total cavopulmonary connection (TCPC) in complex congenital heart diseases.

Methods: From June 1998 to March 2008, 22 patients underwent staged TCPC for complex congenital heart diseases. Among them, 9 were univentricular and pulmonary artery valve stenosis; 3 were univentricular and pulmonary artery atresia; 1 was transposition of great arteries, crisscross heart and pulmonary artery valve stenosis; 1 was complete atrioventricular canal defects, left ventricular hypoplasia, pulmonary artery atresia and atrioventricular valvular regurgitation; 1 was complete atrioventricular canal defects, left ventricular hypoplasia, pulmonary artery valve stenosis and atrioventricular valvular regurgitation after Glenn procedure; 1 was mirror image dextrocardia, single ventricle, pulmonary artery atresia, major aortopulmonary collateral arteries (MAPCAs) and right pulmonary arteriovenous fistula after Glenn procedure; 4 were tricuspid atresia and pulmonary artery valve stenosis; 1 was tricuspid atresia and pulmonary atresia; 1 was mirror image dextrocardia, double-outlet of right ventricle, left ventricular hypoplasia, pulmonary artery valve stenosis, tricuspid incompetence, and MAPCAs.

[Coronary artery bypass grafting in patients over 70 years old].

Objective: To retrospectively analyze the experiences, indications, technique, and results of coronary artery bypass grafting (CABG) in patients over 70 years old.

Methods: Ninety-one patients received coronary artery bypass grafting from March 2004 to March 2008. Ages ranged from 70 to 83 years old, 22 patients over 75 years old.

[Surgical treatment of complex congenital heart diseases with extracardiac conduit total cavopulmonary connection].

Objective: To report the experience of extracardiac conduit total cavopulmonary connection (ECTCPC) in surgical treatment of complex congenital heart diseases.

Methods: From 1998 to 2006, 68 patients underwent ECTCPC for complex congenital heart diseases. Among them, 45 had functional univentricle with transposition of the great artery (TGA) and pulmonary artery valve stenosis, 19 had tricuspid atresia with hypoplasia of right ventricle, 4 had Ebstein's anomaly with hypoplasia of right ventricle.

Relationship of remote sensing normalized differential vegetation index to Anopheles density and malaria incidence rate.

Objective: To study the relationship of remote sensing normalized differential vegetation index (NDVI) to Anopheles density and malaria incidence rate.

Methods: Data of monthly average climate, environment, Anopheles density and malaria incidence rate, and remote sensing NDVI were collected from 27 townships of 10 counties in southeastern Yunnan Province from 1984 to 1993. The relationship of remote sensing ecological proxy index, NDVI, to Anopheles density and malaria incidence rate was studied by principal component analysis, factor analysis and grey correlation analysis.

[Valve-sparing aortic root replacement in patients with aortic root disease].

Objective: To review the results of the valve-sparing operation (David procedure) in patients with aortic root disease.

Methods: Twenty-nine patients with aortic root disease, 20 males and 9 females, aged 39 +/- 17 (10-64), 10 being of heart functional class I, 15 of class II, and 4 of class III, and 15 with gentle, 9 with moderate, and 5 with severe aortic insufficiency underwent David procedure, one undergoing the aortic valve-sparing reimplantation (David I), 25 undergoing aortic valve-sparing remodeling (David II), and 3 undergoing a new modified aortic valve-sparing operation. After the operation the patients were followed up for 29 +/- 15 months (5-74 months).