Weighing collected samPles to determine the IPS' content of indoor air and adopting the length of collecting time as 4 , 6and8 hours, the experimental accuracy and analytic errors were seParatdy analysed in different length of collecting time, as a result, when the IPS' content is less than 0.300mg.m-3, the smallest co-fficient of variation came from the statistic result of which its length of collecting time was 8 hours and in anaylsis its Permissible relative errors were not more than 10%, so it could be determined that the apporiate length of ccollecting time was 8 hours ( CIP

Objective In order to understand the quality of drinking water sources and the environment of the Qinghai-Tibet Railway areas. Methods In 2002-2004, the first and second phase of the project of Qinghai-Tibet Railway, 37 sampling sites were chosen in the dry and rainy seasons and the water samples were analyzed according to the national standard test methods. Results In the first phase of the project, the eligible rates of the 39 test indexes of the water sources of 23 sampling sites in the Qinghai-Tibet Railway areas were 82%-95% in the dry season and some decreased in the rainy season. In the second phase, the eligible rates of the test indexes of the water sources of 14 sampling sites were 50%-100% in dry season and in the rainy season, the trend was the same as in the first phase. Conclusion Among the 37 water resources in the Qinghai-Tibet railway areas,the percent of gradeⅠ, gradeⅡ, grade Ⅲ and above grade Ⅲ water source was 67.57%,13.51%,2.70% and 16.22% respectively, some water sources can not be used as the drinking water sources due to the bad quality.

Objective To investigate the status of Helicobacter pylori(Hp)infection with subclinical hepatic encephalopathy (SHE) and the level of blood ammonia. Methods Sixty-five SHE patients and healthy volunteer were selected. In all subjects Hp was assessed by rapid urease test (RUT) and histological examination. It would be regarded as Hp infection if both the RUT and histological examination were positive. The level of blood ammonia was detected and number connection test (NCT), digit symbol test (DST)and electroencephalogram (EEG)was performed. The patients could be diagnosed with SHE whichever of the three tests was abnormal. The patients with Hp infection were randomized received one-week standard treatment. Bacterial eradication was assessed with <'14>C-urea breath test after the treatment of 6-8 weeks, meanwhile above mentioned examinations were reassessed. Results The ratio of Hp infection in SHE patients (46.2%, 30/65 )was higher than that in healthy controls ( 33.3 % ,20/60), but there was no significant difference(P> 0.05).The blood ammonia level before and after eradication had no significant difference(P> 0.05 ). No improvement was observed in above mentioned examinations after treatment. Conclusion There is no relationship between the level of blood ammonia and Hp infection in SHE.

Objective To compare sodium supplement and sodium restriction to the effect of the extinction and prognosis of liver cirrhosis ascites, and research the relationship between live cirrhosis ascites and plasma sodium.Methods 119 liver cirrhosis patients were randomly divided into 2 groups :60 cases of sodium supplement and 59 cases of sodium restriction. 60 cases of sodium supplement was kept low-salt diet and intravenous sodium chloride supplement(3 ～5 g/d) ,59 cases of sodium restriction was only kept low-salt diet. Plasma sodium,plasma chloride,urine sodium, urine sodium chloride were detected before treatment, and 6 days, 10 days after treatment respectively. And the urine quantity,extinction of ascites and prognosis were compared. Results There were significant differences on the increase of plasma sodium,plasma chloride,urine sodium,urine chloride and urine quantity after treatment in two groups. Extinction time of ascites was shorter in group of sodium supplement. The morbidity and fatality rate of hepatic encephalopathy, and hepatorenal syndrome in the group of sodium supplement were lower than that in the group of sodium restriction. Conclusion Sodium supplement should be adapted when using diuretic agent to help the extinction of ascites, and to improve recovery.

Objective To assess the therapeutic effect and opportune time of surgical treatment of hepaticolithiasis . Methods The clinical data of 92 patients with hepaticolithiasis who underwent surgical treatment were analyzed retrospectively. Results (1) The incidence of postoperative complications was 14.1% (13/92 cases), in choledochoscopy group it was 9.3%(4/43 cases) and in the non choledochoscopy group 18.4%(9/49 cases) ; in the emergency operation group it was 36%(9/25 cases) and in selective operation group 5.97%(4/67 cases) . (2) The incidence of residual stones was 22.9%(21/92 cases); in choledochoscopy group it was 13.9%(6/43 cases) and the non choledochoscopy group 30.6%(15/49 cases); in emergency surgery group it was 36%(9/25 cases) and in selective operation group 17.9%(12/67 cases).(3)One pationt died from ACST two days after operation . All of the patients were followed up for 4-10 years; there were 80 cases (86.9%) who had a good therapeutic outcome. Conclusions Logical surgical procedure associated with choledochoscopy and appropriate timing of surgical intervention can markedly improve the effect of surgical treatment of hepaticolithiasis and reduce the incidence of postoperative complications.

Objective To assess the influence of length of the alanine tract of forkhead box E1 (FOXE1) gene on genetic susceptibility to idiopathic premature ovarian failure (POF). Methods Totally 110 patients with idiopathic POF were recruited between February 2009 and December 2012 at the Affiliated Shenzhen City Maternity and Child Healthcare Hospital of Southern Medical University. Controls (n=110) were individuals with normal menstrual cycles, normal FSH concentrations. The polyalanine tract and flanking sequence of FOXE1 were screened using the multiplex ligation-dependent probe amplification (MLPA) technique and direct sequence technique. Results The most frequent of FOXE1 polyalanine stretch length was 14 residues in both groups. The length of FOXE1 polyalanine reported in this study varied from 12 to 16 alanines, and three variants of FOXE1-polyalanine length, containing 12, 14, or 16 alanine residues, and 5 different genotypes were identified. The most common genotypes were 14/14 homozygote, occurring with the frequency of 81.8% (90/110) in the POF group, while 96.4% (106/110) in control subjects, respectively. The incidence of 14/14 genotypes of FOXE1-polyalanine was significantly lower in patients with POF (χ2=119.730, P=0.001) in comparison to the controls. There were significantly higher frequencies of the 16/16 genotypes in cases with POF [10.0% (11/110) versus 0; χ2=3.403, P=0.001], as compared with the controls. The FOXE1 14 alanine allele was significantly less common in the POF patient group than the controls [84.5% (186/220) versus 98.2% (216/220); χ2=25.923, P=0.001]. The FOXE1 16 alanine allele was significantly more common in the POF patient group than the controls [12.7% (28/220) versus 1.8% (4/220); χ2=19.412, P=0.001]. Conclusions The polymorphism of the polyalanine tract of FOXE1 gene have a certain relevance for the genetic aetiology of idiopathic POF.

Objective To compare the diagnostic performance of prospective electrocardiogram (ECG)-gating 320-detectorcomputed tomography coronary angiography (CTCA) versus retrospective ECG-gating CTCA. Methods 500consecutive patients suspected coronary artery disease with heart rate of less than 65 bpm were performed coronary computed tomography angiography (CCTA) with prospective (group P)and retrospective (group R) ECG gating in turn. The image quality was divided into four levels. Success rates, effective radiation dose,image quality and diagnosis were evaluated. Results Success rates of examination in group P and R are100%.Mean patient radiation dose was significantly different in group P (3.28±1mSv) and R(14.36 ±2.3 mSv).131 and 142 of 3750 segments (250 patients x 15 segments per patient) were too small(1.5mm)tobe characterized in group P and R. 96. 51% (3619/3750) and 96.12% (3608/3750) characterized segments were not significantly different in group P and R. 95.09% segments received a score of 4 and 1.09% segments received a score of 3 in group P, while 95.23% and 0.74% in group R.The cause of 2 and 3 points in the two groups was motion artifact. Stair-step artifacts and images scored as 1were not found.Compared with CAG,the sensitivity,specificity,false positive andfalse negative value in group P(86. 49% ,98. 70% ,88. 89% ,98.38%) and R(83. 87% ,98.74% ,89. 65%,97.93%) were not significantly different. Conclusion Although the patient radiation exposure was significantly lower, the diagnostic performance of prospective ECG-gating 320-detector CTCA was comparable with that of retrospective ECG-gating 320-detector CTCA on patients with stable heart rates less than 65 bpm.

Objective To explore the changes of nitric oxide (NO) and superoxide dismutase(SOD) in the serum and intestine mucosal and the treatment of ulcerative colitis(UC) with Tanshinone.Methods Seventy-nine patients with UC were randomly divided into the treatment group(group A,n=40) and the routine treatment group(group B,n=39).Patients in the group A were given Tanshionon and routine treatment.Patients in group B were given routine treatment.The levels of NO and SOD were measured in all patients before and after the treatment.The clinical symptom,enteroscopy,and hospital day were compared in the patients of the two groups.Twenty normal healthy controls(group C) were involved in the study.Results The NO level in the serum and intestine mucosal was significantly increased and the SOD level was significantly decreased in the patients with UC compared with those of the controls(all P

Objective To study the safety, reasonableness and feasibility of D 3 lymphadenectomy(LC) for advanced right colon cancer(ARCC). Methods 97 cases of ARCC were divided randomly into two groups: D 2.LC group (55cases) and D 3 LC group (42cases). The climical data between D 3 LC and D 2LC were compared. Results Comparing to D 2 LC,D 3 had higher operative invasive degree, but the incidence of postoperative complications did not increase, the ratio of the curable resection and the three-year and five-year survival rate after operation were significantly higher (88.1% and 73.8% vs 72.8% and 52.7%) (all P

Objective Using CT perfusion (CTP) technique,to investigate the graft perfusion changes in patients with hepatic artery stenosis (HAS) with or without ischemic-type biliary lesions (ITBL) after orthotopic liver transplantation (OLT).Methods Thirteen recipients with HAS received CTP scan of the liver,including 8 with ITBL and 5 without ITBL.For all patients,the diagnosis of HAS was made by CTA,and the diagnosis of ITBL by percutaneous transhepatic cholangiography.CT perfusion indices were obtained,including hepatic artery perfusion (HAP),portal vein perfusion (PVP),total liver perfusion (TLP) and hepatic perfusion index (HPI).Results Of the 13 patients with HAS,mean HAP in patients with and without ITBL was 59.8 and 35.1 ml·min-1 ·100 ml-1 (P =0.021,two-tailed paired Student t test) ; mean PVP was 125.4 and 166.2 ml·min-1·100 m1-1 (P =0.016) ; mean TLP was 185.2 and 201.3 ml· min-1 · 100 ml-1 (P =0.306) ; and mean HPI was 33.6 and 18.2 (P =0.005),respectively.Conclusion Using CTP technique,liver perfusion changes were reflected by measuring CTP indices noninvasively.Compared to those without ITBL in this study,HAP and HPI in patients with ITBL were higher and PVP was lower,which may be contributed to biliary inflammation.