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Epidemiology of perforated peptic ulcer:Age-and gender-adjusted analysis of incidence and mortality

World Journal of Gastroenterology 2013年第3期19卷 347-354页

作者： Kenneth Thorsen jon arne sreide Jan Terje Kvaly Tom Glomsaker Kjetil sreide Department of surgery Stavanger University HospitalN-4068 StavangerNorway Department of surgical science University of Bergen5020 BergenNorway Department of Mathematics and Natural science University of Stavanger4036 StavangerNorway

AIM:To investigate the epidemiological trends in inci-dence and mortality of perforated peptic ulcer(PPU)in a well-defined Norwegian population. METHODs:A retrospective,population-based,single-center,consecutive cohort study of all patients diag-nosed with benign perforated peptic *** were both gastric and duodenal ulcer patients admitted to stavanger University Hospital between January 2001 and December *** with a malignant neoplasia diagnosis,verified by histology after biopsy or resection,were *** were identified from the hospitals administrative electronic database using pertinent ICD-9 and ICD-10 codes(K25.1,K25.2,K25.5, K25.6,K26.1,K26.2,K26.5,K26.6).Additional searches using appropriate codes for relevant laparoscopic and open surgical procedures(e.g.,JDA 60,JDA 61,JDH 70 and JDH 71)were performed to enable a complete identification of all *** demographics,presentation patterns and clinical data were retrieved from hospital records and surgical *** and adjusted incidence and mortality rates were estimated by using national population demographics data. REsULTs:In the study period,a total of 172 patients with PPU were *** adjusted incidence rate for the overall 10-year period was 6.5 per 100 000 per year(95%CI:5.6-7.6)and the adjusted mortality rate for the overall 10-year period was 1.1 per 100 000 per year(95%CI:0.7-1.6).A non-significant decline in ad-justed incidence rate from 9.7 to 5.6 occurred during the *** standardized mortality ratio for the whole study period was 5.7(95%CI:3.9-8.2),while the total 30-d mortality was 16.3%.No difference in in-cidence or mortality was found between ***,for patients≥60 years,the incidence increased over 10-fold,and mortality more than 50-fold,compared to younger *** admission rates outside office hours were high with almost two out of three(63%) admissions seen at evening/night time shifts and/or during *** observed season

关键词： Perforated peptic ulcer Epidemiology Incidence Mortality seasonal variation

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Vehicle fuel from biogas with carbon membranes; a comparison between simulation predictions and actual field demonstration

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Green Energy & Environment 2018年第3期3卷 266-276页

作者： shamim Haider arne Lindbrathen jon Arvid Lie Petter Vattekar Carstensen ThorbjØrn Johannessen May-Britt Hagg Norwegian University of science and Technology NTNUDepartment of Chemical Engineering

The energy contents of biogas could be significantly enhanced by upgrading it to vehicle fuel quality.A pilot-scale separation plant based on carbon hollow fiber membranes for upgrading biogas to vehicle fuel quality was constructed and operated at the biogas plant,Gl?r IKs,Lillehammer *** fuel quality according to swedish legislation was successfully achieved in a single stage separation *** raw biogas from anaerobic digestion of food waste contained 64±3 mol%CH_4,30–35 mol%CO_2 and less than one percent of N_2 and a minor amount of other *** raw biogas was available at 1.03 bar with a maximum flow rate of 60 Nm^3h^(à1).Pre-treatment of biogas was performed to remove bulk H_2O and H_2s contents up to the required limits in the vehicle fuel before entering to membrane *** membrane separation plant was designed to process 60 Nm^3h^(à1)of raw biogas at pressure up to 21 *** initial tests were,however,performed for the feed flow rate of 10 Nm^3h^(à1)at 21 *** successful operation of the pilot plant separation was continuously run for 192 h(8days).The CH_4 purity of 96%and maximum CH_4 recovery of 98%was reached in a short-term test of 5 *** permeate stream contained over20 mol%CH_4which could be used for the heating *** Hysys~?was integrated with Chem Brane(in-house developed membrane model)to run the simulations for estimation of membrane area and energy requirement of the pilot *** estimation was performed based on simulation data and later compared with actual field results.

关键词： Biogas upgrading Pilot-scale demonstration Membrane separation Process simulations

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