[PM Source Apportionment Based on a Variety of New Receptor Models].

In order to understand the applicability of various new receptor models, four receptor models, including the positive matrix factorization/multilinear engine 2-species ratio (PMF/ME2-SR), partial target transformation-positive matrix factorization (PTT-PMF), positive matrix factorization (PMF), and chemical mass balance (CMB), were used to analyze and verify the atmospheric fine particulate matter (PM) data of a typical city in northern China. It was found that coal combustion (25%-26%), dust (19%-21%), secondary nitrate (17%-19%), secondary sulfate (16%), vehicle emissions (13%-15%), biomass burning (4%-7%), and steel (1%-2%) had a contribution to PM. By comparing the source profiles and source contributions obtained by different models and calculating the coefficient of differences (CD) and average absolute error (AAE) of each source, we found that although the source apportionment results of the four models were in good agreement (the average CD value was between 0.

[Two Cases of Laparoscopic Pancreaticoduodenectomy in the Sophisticated and Complicated Situations (with Video)].

Objective: To explore the individualized surgical strategies and surgical methods which can greatly improve the efficacy and safety of laparoscopic pancreaticoduodenectomy in difficult and complicated situations, such as pancreatic head malignant tumors invade the major vascular and chronic pancreatitis with severe abdominal adhesions.

Methods: Case 1：A 65-year-old man with jaundice was diagnosed preoperatively with a pancreatic acinus process with superior mesenteric vein (SMV) invasion. In order to ensure R0 resection, the patient underwent laparoscopic pancreaticoduodenectomy combined with SMV resection and reconstruction, taking the way of the superior mesenteric artery (SMA)-first approach.

[Optimization of Operative Procedure in Total Laparoscopic Pancreaticoduodenectomy (with Video)].

Objective: To optimize operative procedure on intraoperative exploration, resection and reconstruction in total laparoscopic pancreaticoduodenectomy (LPD).

Methods: The clinical data of patients who underwent total LPD in West China Hospital (and Shangjin Hospital) of Sichuan University from Dec. 2015 to Dec.

[Application of Early Splenic Artery Occlusion in Laparoscopic Spleen-preserving Distal Pancreatectomy using Kimura Technique].

Objective: To present our institutional experience in laparoscopic spleen-preserving distal pancreatectomy (Lap-SPDP) using Kimura technique with or without early occlusion of the root of the splenic artery. In addition, to explore the safety and feasibility of this occlusion technique, especially its advantages in intraoperative hemorrhage control and spleen preservation.

Methods: From February 2011 to May 2019, 54 consecutive patients who were diagnosed as benign or low-grade malignant space-occupying lesions at the body and the tail of pancreas underwent Lap-SPDP using Kimura technique in our institution.

[Predictive Value of POSSUM and P-POSSUM Scoring System for Risk Assessment in Laparoscopic Pancreatoduodenectomy].

Objective: To evaluate the clinical predictive ability of POSSUM and P-POSSUM scoring system in laparoscopic pancreatoduodenectomy (LPD).

Methods: There were 132 consecutive LPD performed in West China Hospital of Sichuan University from February 2014 to July 2017. The clinical data were retrospective collected, including 12 preoperative physiological variables, 6 operative severity variables, and complications and mortality The postoperative expected mortality and morbidity were calculated by POSSUM and P-POSSUM score, and compared with measured morbidity and mortality.

Longitudinal behavioral and fMRI-based assessment of inhibitory control in heroin addicts on methadone maintenance treatment.

The objective of the present study was to determine whether methadone maintenance treatment (MMT) in heroin-dependent patients affects inhibitory control, whether any MMT-induced changes correlate with methadone dose and MMT duration, and whether these changes depend on the psychological characteristics of patients, such as depression, anxiety and impulsivity. Response inhibition in the GO/NO-GO test was combined with functional magnetic resonance imaging (fMRI) scanning data to examine whether MMT affects inhibitory control in 21 heroin-addicted patients who had already undergone at least three months of MMT. Patients were evaluated one year prior to and after the MMT period.

Laparoscopic Roux-en-Y duodenojejunostomy for annular pancreas in adults: case report and literature review.

Annular pancreas is in adults is a rare congenital anomaly which incidence varied from 0.005% to 0.015%.

Comparison of Laparoscopic and Open Pancreaticoduodenectomy for the Treatment of Nonpancreatic Periampullary Adenocarcinomas.

Background: Laparoscopic pancreaticoduodenectomy (LPD), a surgical option for nonpancreatic periampullary adenocarcinoma (NPPA), is a complex procedure that has become increasing popular. However, there is no consensus as to whether this technique should be performed routinely. Our aim was to evaluate the outcomes of LPD compared with open pancreaticoduodenectomy (OPD).

Magnetic resonance cholangiopancreatography study of pancreaticobiliary maljunction and pancreaticobiliary diseases.

Aim: To discuss the imaging anatomy about pancreaticobiliary ductal union, occurrence rate of pancreaticobiliary maljunction (PBM) and associated diseases in a Chinese population by using magnetic resonance cholangiopancreatography (MRCP).

Methods: Data were collected from 694 patients who underwent MRCP from January 2010 to December 2012. Three hundred and ninety-three patients were male and 301 patients were female.

[Delayed gastric emptying after laparoscopic versus open pancreaticoduodenectomy: a comparative study].

Objective: To investigate the effect on postoperative delayed gastric emptying (DGE) after laparoscopic versus open pancreaticoduodenectomy (PD).

Methods: Data from 67 consecutive PD procedures performed between October 2010 and October 2012 were retrospectively analyzed. Among them, 20 patients underwent laparoscopic PD (LPD group), and 47 patients underwent open PD (OPD group; 22 patients underwent pylorus-preserving PD, 25 patients underwent standard PD).

Laparoscopic splenectomy for treatment of splenic marginal zone lymphoma.

Aim: To investigate the short-term and long-term efficacy and safety of laparoscopic splenectomy (LS) for treatment of splenic marginal zone lymphoma (SMZL).

Methods: A total of 18 continuous patients who were diagnosed with SMZL and underwent LS in our department from 2008 to 2012 were reviewed. The perioperative variables and long-term follow-up were evaluated.

[Synthesis of a supermolecular nanoparticle γ-hy-PC/Ada-Dox and its antitumor activity].

Objective: To synthesize a (2-Hydroxypropyl)-γ-cyclodextrin-polyethylenimine/adamantane-conjugated doxorubicin (γ-hy-PC/Ada-Dox) based supramolecular nanoparticle with host-guest interaction and to identify its physicochemical characterizations and antitumor effect.

Methods: A novel non-viral gene delivery vector γ-hy-PC/Ada-Dox was synthesized based on host-guest interaction. 1H-NMR, NOESY, UV-Vis, XRD and TGA were used to confirm the structure of the vector.

[Association of differentially expressed genes in the macrophages of spleen in patients with idiopathic thrombocytopenic purpura by cDNA microarray].

Objective: To study the differentially expressed genes of splenic macrophage in patients with immune thrombocytopenic purpura.

Methods: Macrophages were isolated from the spleen. Total RNA of the macrophages were extracted and reversely transcript into cDNA.

[Involvement characteristics and influencing factors of anxiety and depression in patients after percutaneous coronary intervention].

Objective: To explore the involvement characteristics and influencing factors of anxiety and depression in patients after percutaneous coronary intervention (PCI).

Methods: A total of 396 patients undergoing PCI were investigated between January 2009 and December 2010. All of them completed the Hospital Anxiety and Depression Scale (HADS) before discharge and at 12 months post-PCI.

Predictive factors of recurrent angina after acute coronary syndrome: the global registry acute coronary events from China (Sino-GRACE).

Background: Many patients with acute coronary syndrome (ACS) develop recurrent angina (RA) during hospitalization. The aim of this non-randomized, prospective study was to investigate the predictive factors of RA in unselected patients with ACS enrolled in the global registry acute coronary events (GRACE) during hospitalization in China.

Methods: Between March 2001 and October 2004, enrolled were 1433 patients with ACS, including ST segment elevation myocardial infarction (662, 46.