In this paper, the common errors in medical devices test reports are classified and analyzed. And then the main 11 influence factors for these inspection report errors are summarized. The hierarchy model was also developed and verified by presentation data using MATLAB. The feasibility of comprehensive weights quantitative comparison has been analyzed by using the analytic hierarchy process. In the end, this paper porspects the further research direction.
Equipment Failure Analysis ; Equipment and Supplies ; standards ; Models, Theoretical

Objective To explore the mechanism of Fudoidan for regulating the disorder of lipid metabolism in rats. Methods Rat hyperlipidemic model was established. The effect of Fudoidan on rats levels of blood lipids, lipid metabolic enzyme, and the lipid contents in the stool, as well as bile metabolismand LDL-R mRNA expression in the liver were observed. Results Fudoidan can notably restrain the concentration of serum total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C) of hyperlipidemic rats and increase the concentration of high-density lipoprotein cholesterol (HDL-C) and activities of 1ipoprotein lipase (LPL), hepatic lipoprotein (HL) and lecithin cholesterol acyltransferase (LCAT).Fucoidan can remarkably increase the contents of cholesterol, TG, bile acid , but has no effect on the secretion of bile, the concentration of cholesterol and bile acid in bile. The results of RT-PCR experiment showed that Fudoidan can notably improve the expression level of low-density lipoprotein receptor (LDL-R) mRNA in the liver of hyperlipidemic rats. Conclusion Fucoidan can regulate the disorder of lipid metabolism probably by restraining the absorption of lipids (TC, cholesterol, bile acid) , activating the activities of lipid metabolic enzyme (LPL, HL and LCAT), and promoting the expression of LDL-R mRNA in the liver.

【Objective】To observe the effect of Huangqi Sijunzi Decoction(HSD) combined with parenteral nutrition in promoting postoperative recovery of gastric cancer patients.【Methods】Eighty gastric cancer patients were randomized into two groups.On the 3rd day after operation,the two groups received parenteral nutrition,and the treatment group(group A) was given HSD additionally.The anal exsufflation time,incision infection rate,biochemical indexes and immune indexes of the two groups were observed.【Results】The anal exsufflation time was(2.40?0.33) days in the treatment group and(3.82?0.26) days in the control group,the difference being significant(P0.05).The increase of pre-albumin in the treatment group was obvious as compared with that in the control group(P0.05).The increase of immune indexes was not obvious in the control group(P

Objective To investigate the relation between microembolic signals (MES) and vertebral basilar artery ste?nosis in patients with brainstem infarction. Methods A total of 156 patients with acute brainstem infarction, who were de?termined the cerebral infarction lesion and vertebral basilar artery stenosis by cranial magnetic resonance imaging and CT an?giography, and were monitored by transcranial Doppler via occipital window of basilar arterial MES monitoring in 7 days of the onset, were divided into microembolus signal negative group (n=136) and positive group (n=20). The clinical data were compared between two groups. The differences of different degrees of stenosis were analyzed in two groups. The differences of different locations of stenosis in patients with vertebral basilar artery stenosis were analyzed in two groups. Logistic regres?sion analysis was used to analyse the factors affecting MES. Results There were no significant differences in age, gender, history of hypertension and diabetes mellitus between the two groups (P<0.05). There were significant differences in the dif?ferent degrees of stenosis between two groups, no or mild stenosis was found in MES-negative group and severe stenosis in MES-positive group (P<0.05). There were 70 cases with no vertebral basilar artery stenosis, 86 cases with mild, moderate and severe stenosis, in which 14 cases were MES-positive and 72 cases were negative. There were significant differences in different locations of stenosis between the two groups. The proportion of multiple infarctions was significantly higher in MES-positive group than that of MES-negative group (P<0.05). The intracranial vertebral basilar artery stenosis and 75%of ver?tebral basilar artery stenosis were the independent risk factors of MES-positive. Conclusion Severe stenosis of the verte?bral basilar artery is more vulnerable to occur MES of posterior circulation, leading to cerebral infarction. Microemboli may be the cause of multiple infarctions in patients with vertebral basilar artery stenosis.

BACKGROUND:Previous research has shown that stem cells at different age stages had various proliferation and differentiation in vitro.Therefore,biological characteristics of bone marrow-derived mesenchymal stem cells at different age stages play a key role in evaluating differentiation into myocardial cells and determining proliferation and differentiation parameters in vitro.OBJECTIVE:To compare in vitro proliferation,surface marking,and differentiation into myocardial cells of bone marrow-derived mesenchymal stem cells from different aged rats.DESIGN,TIME AND SETTING:An in vitro contrast cytological observation was performed at the Laboratory of Biochemistry and Molecular Biology,Shanxi Medical University from May 2008 to May 2009.MATERIALS:A total of 15 healthy male Wistar rats were divided into three groups:1-month-old,3-month-old,and 12-month-old groups,with 5 rats in each group.METHODS:Bone marrow-derived mesenchymal stem cells were cultured using adherence screening method.At the third passage,cells differentiated into myocardium-like cells by the induction of 5-azacytidine.MAIN OUTCOME MEASURES:Cell proliferation was observed using MTT;cell surface marking was detected using flow cytometry;cardiac-specific myosin heavy chain mRNA expression was measured using RT-PCR.RESULTS:Bone marrow-derived mesenchymal stem cells were adherent in each group,and the proliferation curve was similar to each other.Under the same culture condition,the proliferation in the 1-month-old and 3-month-old groups was faster than 12-month-old group (F=28.71,P ＜ 0.05).The third-passage cells strongly expressed CD44 and CD71 but weakly expressed CD34 and CD45.At 2 weeks after 5-azacytidine induction,cardiac-specific myosin heavy chain mRNA was observed in all groups;however,the cardiac-specific myosin heavy chain mRNA expression in both 1-month-old and 3-month-old groups was significantly greater than 12-month-old group (t=5.140,2.827,P ＜ 0.05).CONCLUSION:With the age increasing of rats,proliferation,survival time,and differentiation of bone marrow-derived mesenchymal stem cells were weakened.

Objective To investigate the relationship between different left ventricular pacing sites and clinical benefit in heart failure patients treated with cardiac resynchronization therapy (CRT).Methods Clinical data of 52 patients of CRT-P/D (pacing and defibrillation) implantation were collected.According to the left ventricular lead implantation sites,52 cases were divided into anterior wall (10 cases),lateral wall (15 cases),posterior wall (16 cases),and posterior base group (11 cases).The efficacy of CRT was evaluated by Minnesota life quality score,left ventricular function and remodeling index.Results In addition to the anterior wall group,Minnesota life quality score of the other groups were significantly lower than preoperative group (P ＜ 0.05).Compared to pre-CRT implantation,left ventricular end diastolic diameter (LVEDD) of the anterior wall and posterior basal group 3 months after CRT implantation had no statistical significance (P ＞ 0.05);the rest groups were lower than preoperative group (P ＜ 0.05).Left ventricular ejection fraction (LVEF) in posterior wall group was increased after CRT implantation 3 months compared to the preoperative group (P ＜0.05).LVEF in anterior wall group was increased only in the 12 months after CRT implantation (P ＜ 0.05).LVEF in the rest groups was increased comparing to the preoperation at 6 and 12 months postoperation (P ＜0.05).CRT non-response rate in anterior wall group was significantly higher than that in the other groups (P ＜ 0.05).CRT response ratio was significantly increased in side,posterior and posterior basal wall compared to the anterior Wall group (P ＜ 0.05).And there were no statistical significance among side wall,posterior wall and basal wall group (P ＞ 0.05).△ QRSd was higher in side wall,posterior wall and posterior basal group after CRT implantation 3 months than anterior wall group (P ＜ 0.05),△ QRSd in posterior basal group was lower than the other two groups (P ＜0.05).Conclusions Left ventricular electrode should be implanted at the side wall and posterior wall firstly,secondly at the posterior basal wall,and avoid at the anterior wall of the left ventricle.

Objective Discussion leukoreduction of red blood cells suspended in two different storage bag placement and he-molysis rate impact on the supernatant free hemoglobin (FHb),to ensure the clinical transfusion is safe and effective.Meth-ods Selected 20 donors to sample 400 ml whole blood per person to make leukodepleted red blood cells,which were evenly divided into 10 bags.The 10 bags were randomly divided into two groups,one to the upright position,one group of horizon-tal.The two groups were stored under the same conditions.Respectively,in the 7,14,21,28,35 day,randomly removed one storage bag from each group,FHb and red blood cell hemolysis rate were measured and analyzed statistically.Results FHb and hemolysis rate results stored in the first 21 days of testing,uprightgroup were (217.310±48.477)mg/L and (0.250± 0.056)%,respectively horizontal group (173.972±39.027)mg/L and (0.189±0.045)%,the results set upright than hori-zontal group,the results were statistically(t=3.114,P =0.003<0.05 and t=3.798,P =0.001<0.05),the difference was statistically significant.Conclusion In the blood storage period,storage bags can be placed horizontally to reduce the de-struction of red blood cells,blood storage is more favorable.

Objective To investigate the efficacy and feasibility of preimplantation genetic diagnosis (PGD) with human leukocyte antigen (HLA) matching for beta-thalassemia. Methods A total of 43 referred beta-thalassemia couples, with at least on child in need of hematopoietic stem cell transplantation (HSCT), underwent PGD for HLA matching at the First Affiliated Hospital of Sun Yat-sen University from 2010 to 2015. PGD cycles of these couples were retrospectively analyzed, and 15 infants born from PGD-HLA were followed up. Results A total of 84 oocyte retrieval cycles were performed, providing 14±7 oocytes per cycle. Fifty nine embryos biopsied cycles were done, including 24 cleavage stage and 35 blastocyst stage biopsy cycles. In cleavage stage, 259 embryos were biopsied, 93.4% (242/259) of them with conclusive molecular diagnosis, and the percentage of unaffected embryos (normo-homozygote and heterozygote) was 71.4%(185/259). The percentage of HLA matched unaffected embryos was 9.3%(24/259). In blastocyst stage, 306 embryos were biopsied, while 93.8% (287/306) of them were conclusive, and the percentage of unaffected embryos was 70.6% (216/306). The percentage of HLA matched unaffected embryos in blastocyst stage biopsy was 14.4%(44/306), which was higher than in cleavage stage biopsy (P<0.05). Forty three female carriers underwent 48 embryo transfer cycles including 3 fresh and 45 frozen-thawed embryo transfer cycles. Three fresh embryo transfer cycles were done after cleavage stage biopsy, resulted in a birth of healthy twins born at 36 weeks′gestation. All the embryos were frozen after blastocyst biopsied. Totally, 54 frozen-thawed embryos that were transferred in 45 frozen-thawed embryo transfer cycles included 25 embryo from cleavage stage biopsy and 29 embryo from blastocyst stage biopsy, and 42 of them were HLA matched. Clinical pregnancy rate and implantation rate per cycle in frozen-thawed embryo transfer were 38%(17/45) and 37%(20/54) respectively. A total of 15 infants were born, 2 were from a fresh embryo transfer cycle, and 13 were from frozen-thawed embryo transfer cycles. Results of prenatal diagnosis from delivered cases were matched to that of PGD. Four sick children have been cured by HSCT from these HLA matched born siblings. Conclusion PGD with HLA matching is an established method for conceiving a child who may donate hematopoietic stem cells to save an ill sibling.

Objective To compare the clinical characteristics of heart failure patients with preserved ejection fraction (HFPEF) and reduced ejection fraction (HFREF).Methods A total of 171 patients with heart failure from September 2015 to November 2017 in the Second Hospital of Shanxi Medical University were retrospectively analyzed . According to left ventricular ejection fraction (EF),the patients were divided into two groups : HEPEF [EF≥45%, 84 cases,mean age (64.8 ±2.2)years old,33 males and 51 females] and HFREF (EF＜45%,87 cases,mean age (74.6 ±1.5) years old,including 61 males and 26 females).The clinical data of the two groups including general information,underlying etiology,biochemical indicators,echocardiography results,medication in detail were recorded. Results Among the 171 patients, there were 69 patients with coronary heart disease , 44 patients with dilated cardiomyopathy,21 patients with hypertensive heart disease ,10 patients with pulmonary heart disease ,15 patients with rheumatic heart disease,7 patients with degenerative valvular disease ,2 patients with congenital heart disease ,2 cases of heart failure caused by atrial fibrillation ,1 case of viral myocarditis .The patients in the HFPEF group were older [(74.6 ±1.5)years old vs.(64.8 ±2.2) years old,t＝3.598,P＝0.015],more women(60.7%vs.29.9%,χ2＝16.410,P＝0.000),lower body weight [(62.7 ±13.4) kg vs.(68.6 ±14.9) kg,t ＝－2.395,P＝0.018],less likely to have renal insufficiency(36.7%vs.53.6%,χ2＝4.670,P＝0.041),and more likely to have hypertension (54.8%vs.37.9%,χ2＝4.871,P＝0.032) and atrial fibrillation(47.6% vs.13.8%,χ2＝23.107,P＝0.000). The HFPEF group had higher admission systolic blood pressure than the HFREF group [(131.2 ±22.2)mmHg vs. (124.1 ±24.9)mmHg,t＝2.058,P＝0.041].The BNP value[(874.2 ±912.3) pg/mL vs.(835.2 ±1 490.4)pg/mL,t＝－5.011,P＝0.000],hemoglobin value[(125.5 ±24.3)g/L vs.(134.7 ±23.9)g/L,t＝－2.460,P＝0.015] in the HFPEF group were lower than those in the HFREF group .The ESR in the HFPEF group was faster than that in HFREF group[(28.0 ±25.6)mm/h vs.(16.9 ±14.9)mm/h,t＝2.486,P＝0.017].The HFPEF group had smaller left ventricular size than the HFREF group [(50.9 ±6.4)mm vs.(67.3 ±8.5)mm,t＝－11.303,P＝0.000].RAS blockers (52.4% vs.86.2%,χ2＝23.107,P ＝0.000),spironolactone (72.6% vs.88.5%,χ2＝6.926,P ＝0.011),β－blockers (57.1% vs.75.9%,χ2＝6.739,P ＝0.015),statin (38.1% vs.54%,χ2＝4.362,P＝0.046) were used more in the HFREF group,while calcium channel blockers (38.1%vs.13.8%,χ2＝13.208,P＝0.000) and warfarin (16.7%vs.5.7%,χ2＝5.159,P＝0.129) were used more in the HFPEF group.Conclusion Different clinical characteristics were found in patients with HFPEF and HFREF ..Different types of heart failure need different treatment and prevention programs .

OBJECTIVETo survey the quality of life in children and adolescents with type 1 diabetes.

METHODSNinety-eight children and adolescents with type 1 diabetes who participated in Diabetes Summer Camp held in Chongqing, Wuhan and Cheng during 2012 April and December were recruited in the study. The American juvenile diabetes patients quality of life scale Diabetes Quality of Life for Youths was used to assess the quality of life and SPSS19.0 was used for statistical analysis.

RESULTSThe scale had satisfactory reliability and validity with a Cronbach's Alpha score of 0.942 and a validity score of 0.679. All three dimension of scales: scales of impact, scales of worries and scales of satisfaction were significantly correlated with self-health assessment (P<0.01). The scores of impact and worries accounted for >50% of total scores as the same for the self health assessment scores. The score of disease course, diet and blood glucose control were positive correlated with each other. Age and HbA1c were positively correlated with the scale of impact, while gender has negative correlation with satisfaction scale (P<0.05). The diabetes diet had significant effects on the quality of life.

CONCLUSIONThe quality of life in children and adolescents with type 1 diabetes is decreased, especially for those with longer disease course and female adolescents. The form of Diabetes Quality of Life for Youth used in the study has good reliability and validity, which can reflect the quality of life of Chinese diabetic children and adolescents.

Adolescent ; Child ; Diabetes Mellitus, Type 1 ; Female ; Humans ; Male ; Quality of Life ; Sickness Impact Profile ; Surveys and Questionnaires ; Young Adult