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Träfflista för sökning "WFRF:(Sandström Thomas) ;pers:(Sandström Per 1965)"

Sökning: WFRF:(Sandström Thomas) > Sandström Per 1965

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1.
  • Johansen, Karin, et al. (författare)
  • High resection rate improves overall survival in elderly patients with pancreatic head cancer - A cohort study
  • 2021
  • Ingår i: International Journal of Surgery Open. - : Elsevier Science Ltd. - 2405-8572. ; 34
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: There is evidence that a high hospital volume of pancreaticoduodenectomy improves short-and long-term outcomes, but there are few population-based studies on the effect of a high resection rate in the population. The aim of this national, observational study was primarily to investigate differences in overall survival among elderly patients with cancer in the pancreatic head between high and low resection rate groups and secondarily to determine if counties with high resection rates of pancreaticoduodenectomy had more severe complications after surgery. Materials and methods: All patients in the Swedish National Registry for tumours in the pancreatic and periampullary region diagnosed between 2010 and 2018 with pancreatic head cancer were included in this retrospective cohort study. Patients were divided into low and high resection rate groups according to the yearly resection rates in the respective counties. For operative outcomes, all patients who had undergone pancreaticoduodenectomy were included regardless of diagnosis. The primary outcome of the study was overall survival among patients aged >= 70 years with pancreatic head cancer. Results: Among 13 933 patients in the registry, 7661 were 70 years or older, of whom 3006 had pancreatic head cancer. Overall survival was longer in high resection rate groups for patients aged >= 70 years, as for the age subgroups 70-79 years and >= 80 years (all p < 0.001). Among patients who had undergone pancreaticoduodenectomy aged >= 80 years the high resection rate counties showed an increased rate of severe complications, but no increase in 90-day mortality. Conclusion: High resection rate groups show a significantly longer overall survival among elderly patients with pancreatic head cancer in Sweden. This implies that there could be a survival benefit from increasing resections in low resection rate groups. (C) 2021 The Author(s). Published by Elsevier Ltd on behalf of Surgical Associates Ltd.
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2.
  • Johansen, Karin, 1990-, et al. (författare)
  • Laparoscopic distal pancreatectomy is more cost-effective than open resection: results from a Swedish randomized controlled trial
  • 2023
  • Ingår i: HPB. - : ELSEVIER SCI LTD. - 1365-182X .- 1477-2574. ; 25:8, s. 972-979
  • Tidskriftsartikel (refereegranskat)abstract
    • BackgroundLaparoscopic distal pancreatectomy is being implemented worldwide. The aim of this study was to perform a cost-effectiveness analysis from a health care perspective.MethodsThis cost-effectiveness analysis was based on the randomized controlled trial LAPOP, where 60 patients were randomized to open or laparoscopic distal pancreatectomy. For the follow-up of two years, resource use from a health care perspective was recorded, and health-related quality of life was assessed using the EQ-5D-5L. The per-patient mean cost and quality-adjusted life years (QALYs) were compared using nonparametric bootstrapping.ResultsFifty-six patients were included in the analysis. The mean health care costs were lower, €3863 (95% CI: -€8020 to €385), for the laparoscopic group. Postoperative quality of life improved with laparoscopic resection and resulted in a gain in QALYs of 0.08 (95% CI: −0.09 to 0.25). The laparoscopic group had lower costs and improved QALYs in 79% of bootstrap samples. With a cost-per-QALY threshold of €50 000, 95.4% of the bootstrap samples were in favour of laparoscopic resection.ConclusionLaparoscopic distal pancreatectomy is associated with numerically lower health care costs and improvements in QALYs compared with the open approach. The results support the ongoing transition from open to laparoscopic distal pancreatectomies.
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3.
  • Johansen, Karin, 1990-, et al. (författare)
  • There Is No Increase in Perioperative Mortality After Pancreaticoduodenectomy in Octogenarians : Results From the Swedish National Registry for Tumors in the Pancreatic and Periampullary Region
  • 2020
  • Ingår i: Annals of Surgery Open. - : Wolters Kluwer. - 2691-3593. ; 1:2
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: The aim of this observational study was to compare postoperative mortality and complications between octogenarians and younger patients following pancreaticoduodenectomy (PD).Summary Background Data: With the growing elderly population and improved operative and postoperative results, PD is performed more frequently in octogenarians. Despite recent studies, it is uncertain whether elderly patients experience worse postoperative outcomes than younger patients.Methods: All patients registered in the Swedish National Registry for tumors in the pancreatic and periampullary region from 2010 to 2018 who underwent PD were included in the analysis.Results: Out of 13,936 patients included in the registry, 2793 patients underwent PD and were divided into the following age groups: <70 (n = 1508), 70–79 (n = 1137), and ≥80 (n = 148) years old. There was no significant difference in in-hospital, 30- or 90-day mortality among groups. The 2 older groups had a higher rate of medical and some surgical complications but not a significantly higher rate of complications ≥IIIa according to the Clavien-Dindo classification system. The 2 older groups had lower body mass index, higher American Society of Anesthesiologists and Eastern Cooperative Oncology Group scores, lower smoking rates, and a higher rate of preoperative biliary drainage than the <70-year-old group (all P < 0.001). The operation time was shorter in the oldest group.Conclusions: Despite the worse preoperative condition of octogenarians than younger patients, short-term mortality and serious complications were not increased. The shorter operation time, however, may indicate that patients in the oldest group were more strictly selected. With careful preoperative consideration, especially regarding cardiovascular morbidity, more octogenarians can potentially be safely offered PD.
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4.
  • Sandström, Per, 1965-, et al. (författare)
  • Depletion of serum L-arginine in patients with acute pancreatitis
  • 2003
  • Ingår i: Pancreas. - : Ovid Technologies (Wolters Kluwer Health). - 0885-3177 .- 1536-4828. ; 27:3, s. 261-266
  • Tidskriftsartikel (refereegranskat)abstract
    • Introduction: Acute pancreatitis may be initiated by interference with the pancreatic outflow to the duodenum. This flow is normally regulated by reflex relaxation of the sphincter of Oddi in which nitric oxide is an important mediator.Aim: To test the hypothesis that acute pancreatitis involves a depletion in serum l-arginine resulting in impaired production of nitric oxide.Methods: We measured serum l-arginine and l-citrulline and urinary nitrite/nitrate concentrations 1 to 3 days after the onset of symptoms in 11 patients with gallstone pancreatitis, 10 patients with alcoholic pancreatitis, and 6 patients with idiopathic pancreatitis. We compared their results with those from control groups of 13 healthy blood donors, 9 patients fasting before hernia operations, 8 patients with acute cholecystitis, and 9 alcoholic subjects but no pancreatitis. Serum arginine and citrulline concentrations were measured with high performance liquid chromatography, and urinary nitrite/nitrate spectrophotometrically.Results: Patients with acute pancreatitis, of whatever cause, had lower serum l-arginine and l-citrulline concentrations than controls. Patients with gallstone and idiopathic pancreatitis also have reduced urinary concentrations of nitrite and nitrate but this was not seen in patients with alcoholic pancreatitis.Conclusions: L-arginine and l-citrulline concentrations are depleted in the serum of patients with acute pancreatitis. Reduced urinary nitrite and nitrate in gallstone pancreatitis indicate that there is a defect formation of nitric oxide. This may cause a functional obstruction of the outflow of pancreatic juice to the duodenum and so may be involved in the pathophysiology of acute pancreatitis.
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5.
  • Sandström, Per, 1965-, et al. (författare)
  • Highly selective inhibition of inducible nitric oxide synthase ameliorates experimental acute pancreatitis
  • 2005
  • Ingår i: Pancreas. - 0885-3177 .- 1536-4828. ; 30:1, s. 10-15
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES:Inducible nitric oxide synthase (iNOS) activity is increased in experimental acute pancreatitis. The aim of this study was to evaluate treatment with the selective iNOS inhibitors AR-C (AR-C102222AA) and L-NIL (L-N6-(1-iminoethyl)-lysine) in experimental acute pancreatitis.METHODS:Acute pancreatitis was induced in anesthetized Australian possums by topical administration of carbachol on the sphincter of Oddi. AR-C treatment was 2 intravenous infusions (2.5 micromol/kg over 15 minutes) at 2 and 4 hours after acute pancreatitis induction. L-NIL treatment was an intraarterial infusion (1 mg/kg/h) from 2 hours after acute pancreatitis induction. At 8 hours, pancreatic tissue was harvested and inflammation assessed (histologic score). Blood samples were collected for plasma amylase, lipase, and amino acid levels. Blood pressure, central venous pressure, supplementary fluids, and urine output were monitored.RESULTS:Treatment with AR-C or L-NIL reduced the plasma levels of amylase and the volume of supplementary fluids and improved the histological score (all P < 0.05). In animals with acute pancreatitis, plasma arginine levels were reduced (P < 0.05), while citrulline and ornithine levels increased (P < 0.05), consistent with increased nitric oxide production. Treatment with AR-C ameliorated the reduced arginine level.CONCLUSIONS:Treatment with AR-C or L-NIL, commencing 2 hours after the induction of acute pancreatitis, has significant and beneficial effects in experimental acute pancreatitis in Australian possums.
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6.
  • Sandström, Per, 1965-, et al. (författare)
  • Serum amino acid profile in patients with acute pancreatitis
  • 2008
  • Ingår i: Amino Acids. - : Springer Science and Business Media LLC. - 0939-4451 .- 1438-2199. ; 35:1, s. 225-231
  • Tidskriftsartikel (refereegranskat)abstract
    • Patients in the early phase of acute pancreatitis (AP) have reduced serum levels of arginine and citrulline. This may be of patho-biological importance, since arginine is the substrate for nitric oxide, which in turn is involved in normal pancreatic physiology and in the inflammatory process. Serum amino acid spectrum was measured daily for five days and after recovery six weeks later in 19 patients admitted to the hospital for acute pancreatitis. These patients had abnormal levels of most amino acids including arginine, citrulline, glutamine and glutamate. Phenylalanine and glutamate were increased, while arginine, citrulline, ornithine and glutamine were decreased compared to levels after recovery. NO2/NO3 concentration in the urine, but not serum arginase activity, was significantly increased day 1 compared to day 5 after admission. Acute pancreatitis causes a disturbance of the serum amino acid spectrum, with possible implications for the inflammatory process and organ function both in the pancreas and the gut. Supplementation of selected amino acids could possibly be of value in this severe condition. © 2007 Springer-Verlag.
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7.
  • Trulsson, Lena, 1950-, et al. (författare)
  • The influence of a load of L-arginine on serum amino acids and pancreatic apoptosis/proliferation and ATP levels in the rat
  • 2004
  • Ingår i: Pancreas. - 0885-3177 .- 1536-4828. ; 29:4, s. 113-120
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES:Administration of high doses of amino acids like ethionine, methionine, and arginine causes pancreatic tissue damage. The initial mechanism behind these effects is not known. The aim of this study was to show the early effects of a load of L-arginine on programed cell death/proliferation and ATP levels in the pancreas.METHODS:We analyzed in rats the effects of intraperitoneal administration of L-arginine on serum amino acids, pancreatic cell apoptosis/proliferation, and ATP levels at 8, 16, and 24 hours. Serum amino acid concentrations were measured with HPLC, tissue ATP was measured fluorometrically, apoptosis was studied with caspase-3 activity and histone-associated DNA-fragments, and proliferation was studied with thymidine autoradiography.RESULTS:After a load of l-arginine, there were initially increased serum levels of L-arginine and L-citrulline, but these fell below control levels after 24 hours as well as amino acids in the glutamate family (ornithine, proline, histidine, and glutamine). Initially, increased ATP levels in the pancreatic tissue returned to control levels at 24 hours. The acinar cells proliferation was suppressed and the apoptosis rate strongly increased at 16 and 24 hours. Pancreatic histology showed vacuole formation in the acinar cells at 8 hours. At 16 hours, there was less vacuolization, but apoptotic bodies were seen, and at 24 hours there was cell degeneration but no necrosis.CONCLUSIONS:After a load of l-arginine, amino acid metabolism causes a high ATP production in the pancreatic tissue that may cause mitochondrial initiation of cell death.
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