L'image du mois. Découverte fortuite d'un pseudo-anévrysme post-traumatique de l'isthme aortique après 15 ans de latence
Brüls, Samuel ; GOFFIN, Pierre ; CREEMERS, Etienne et al
in Revue Médicale de Liège (2010), 65(11), 603-605Detailed reference viewed: 166 (37 ULg)
High Levels of 18F-FDG Uptake in Aortic Aneurysm Wall are Associated with High Wall Stress
; ; NCHIMI LONGANG, Alain et al
in European Journal of Vascular and Endovascular Surgery (2010), 39Detailed reference viewed: 98 (14 ULg)
Evaluation of spectrophotometric methods for antioxidant compound measurement in relation to total antioxidant capacity in beverages.
Tabart, Jessica ; Kevers, Claire ; Pincemail, Joël et al
in Food Chemistry (2010), 120
The validity of different colorimetric methods used to quantify various families of antioxidant compounds was evaluated with standard compounds. The colorimetric tests for global evaluation of flavonoids ... [more ▼]
The validity of different colorimetric methods used to quantify various families of antioxidant compounds was evaluated with standard compounds. The colorimetric tests for global evaluation of flavonoids, anthocyans, and flavanols were found generally unreliable, as reactions could be different for individual compounds within a family (anthocyanins or flavonols or flavan-3-ols) and not specific to one family. In the flavonoid test, for example, flavonols reacted very well, anthocyanins did not react, and flavanons reacted only slightly. The same methods were applied also to beverages known for their antioxidant content (apple, orange, grape, and vegetable juices, ice tea, and red wine) and the data were compared with the results of HPLC analysis of specific compounds. The values obtained in a colorimetric test were generally higher than the sum of the values obtained for the corresponding individual compounds by HPLC analysis, mainly because other compounds can interfere with the colorimetric tests. For example, in wine, anthocyanin concentrations obtained by colorimetric test were 9068 1407 µ mol /100ml (mean SEM), higher than the sum of the six main anthocyanidins detected by HPLC, only 41 µmol/100 ml. The relative antioxidant capacity values determined for beverages on the basis of colorimetric tests could exceed by far the values previously measured in radical-scavenging tests (for instance, the antioxidant capacity attributable to anthocyans in wine on the basis of the colorimetric test was 50 times higher than the total antioxidant capacity measured by the ORAC assay). In conclusion, colorimetric tests for flavonoids, anthocyans, and flavanols appeared generally unreliable for estimating their content and thus the antioxidant capacity reliable to these compounds. [less ▲]Detailed reference viewed: 274 (90 ULg)
Genome-wide association study identifies sequence variants within the DAB2IP gene conferring susceptibility to abdominal aortic aneurysm.
; ; et al
in Nature Genetics (2010)Detailed reference viewed: 19 (7 ULg)
Effects of large pore hemofiltration in a swine model of fulminant hepatic failure
Detry, Olivier ; Janssen, Nathalie ; Cavalier, Etienne et al
in Acta Gastro-Enterologica Belgica (2010), 73(1), 35Detailed reference viewed: 20 (3 ULg)
Consequences of laparoscopy on liver ischemia during portal triad clamping in a swine model
Gilson, Nathalie ; ; et al
in Acta Gastro-Enterologica Belgica (2010), 73(1), 13Detailed reference viewed: 48 (14 ULg)
Extracorporeal membrane oxygenation (ECMO) in ICU patients suffering from cardiogenic shock, refactory hypoxemia or cardiac arrest
MASSION, Paul ; LEDOUX, Didier ; PIRET, Sonia et al
in Revue Médicale de Liège (2010)Detailed reference viewed: 53 (7 ULg)
L’ECMO (ExtraCorporeal Membrane Oxygenation) aux soins intensifs : intérêt chez le patient en choc cardiogénique réfractaire, en hypoxémie réfractaire ou en arrêt cardiaque.
Massion, Paul ; Ledoux, Didier ; et al
in Revue Médicale de Liège (2010), 65
ExtraCorporeal Membrane Oxygenation (ECMO) is a cardiopulmonary assistance device able to support patients in cardiac arrest, refractory cardiogenic shock or refractory hypoxemia otherwise sentenced to ... [more ▼]
ExtraCorporeal Membrane Oxygenation (ECMO) is a cardiopulmonary assistance device able to support patients in cardiac arrest, refractory cardiogenic shock or refractory hypoxemia otherwise sentenced to death. Recent technical progresses, early indication decision, bedside multidisciplinary implant, specific complications screening and echocardiographic weaning testing are crucial points to allow success of this exceptional technique. [less ▲]Detailed reference viewed: 213 (32 ULg)
Hyperacute graft rejection during heart transplantation for giant cell myocarditis: A case report.
; Delbecque, Katty ; Defraigne, Jean-Olivier et al
in Pathology - Research & Practice (2010), 15(206), 411-4
We report the case of a patient with giant cell myocarditis who was bridged to transplantation with mechanical circulatory support and developed a fatal perioperative hyperacute rejection. The patient had ... [more ▼]
We report the case of a patient with giant cell myocarditis who was bridged to transplantation with mechanical circulatory support and developed a fatal perioperative hyperacute rejection. The patient had received abundant transfusions that had raised her anti-HLA antibody titers. The cross-match test was positive. No pre-transplantation immunosuppressive therapy had been administered given concomitant infection. The severity and acuteness of the rejection in this case likely reflect the combined effect of preformed anti-HLA antibodies in the context of an active organ-specific immune process at the time of transplantation. This case raises the questions of the need for intensive immunosuppressive therapy before transplantation in giant cell myocarditis and of the management of patients with positive cross-match in the context of a giant cell myocarditis. [less ▲]Detailed reference viewed: 31 (8 ULg)
Management of blood volume during extracorporeal circulation in cardiac surgery
Blaffart, Francine ; Defraigne, Jean-Olivier
in IRBM - Ingénierie et Recherche Biomédicale = BioMedical Engineering and Research (2010), 31
The management of blood volume during major surgical procedures as cardiac surgery during extracorporeal circulation (ECC) is crucial in maintaining the homeostasis of the patient . Currently, the ... [more ▼]
The management of blood volume during major surgical procedures as cardiac surgery during extracorporeal circulation (ECC) is crucial in maintaining the homeostasis of the patient . Currently, the perfusionnist has few medical or perfusion data based on the evidence (EBM and EBP) in this area. It’s only the relationship between the level of hemodilution and the restriction or absence of homologous blood transfusion and mortality or postoperative morbidity that is supported by EBM and EBP [2-7]. The adequate control is not only limited to the miniaturization of the cardio pulmonary circuits ; it implies, on a practical standpoint, a circuit design and a choice of components combining safety, biocompatibility and reduced priming volume and dilution. The clinical and therapeutic constraints are dependent on the patient . These ones require an analysis of the useful blood volume upstream and downstream the E.C.C. sequence . [less ▲]Detailed reference viewed: 24 (4 ULg)
The use of an adapted model allows contributing to the “Reduction” of mice used in experimental protocols: the case of the apoE–deficient (apo E-/-) mice in a model of atherosclerosis control
Cherdon, Céline ; ; de Leval, Laurence et al
Poster (2009, December 01)
Atherosclerosis is a chronic vascular disease whose development is influenced by several mediators 1. Among them, the prostanoids large family lipids generated from the metabolism of arachidonic acid by ... [more ▼]
Atherosclerosis is a chronic vascular disease whose development is influenced by several mediators 1. Among them, the prostanoids large family lipids generated from the metabolism of arachidonic acid by the action of COX includes various types of PGs and thromboxane. Thromboxane A2 and PGI2 are present in abnormally elevated concentration in atherosclerosis 2-3. To exert its effects TXA2 and its precursor PGH2 act at a specific receptor termed TP receptor 4. As a result, TXA2 synthase inhibitors and TP antagonists have been developed to reduce and to prevent TXA2 production and actions, respectively. The present study was undertaken in order to investigate whether BM-573, an original sulfonylurea derivate synthesized in our lab 5, and aspirin would be effective in preventing the progression of atherosclerosis in an apo E deficient mouse model. [less ▲]Detailed reference viewed: 57 (14 ULg)
Le pneumopéritoine aggrave l'ischémie hépatique lors du clampage hilaire dans un modèle porcin
; ; et al
in Journal de Chirurgie (2009, December), 146Detailed reference viewed: 72 (21 ULg)
Reasoning versus knowledge retention and ascertainment throughout a problem-based learning curriculum
Collard, Anne ; Gelaes, Sabine ; Vanbelle, Sophie et al
in Medical Education (2009), 43
CONTEXT: Since 2000, problem-based learning (PBL) seminars have been introduced into the curriculum of medical studies at the University of Liège. We aimed to carry out a cross-sectional investigation of ... [more ▼]
CONTEXT: Since 2000, problem-based learning (PBL) seminars have been introduced into the curriculum of medical studies at the University of Liège. We aimed to carry out a cross-sectional investigation of the maturational increase in biomedical reasoning capacity in comparison with factual knowledge retention throughout the curriculum. METHODS: We administered a factual knowledge test (i.e. a true ⁄ false test with ascertainment degree) and a biomedical reasoning test (i.e. an adapted script concordance test [SCT]) to 104 students (Years 3–6) and a reference panel. The selected topic was endocrinology. RESULTS: On the SCT, the students obtained higher scores in Years 5 and 6 than in Years 3 and 4. In Year 3, the scores obtained on SCT questions in a new context indicated transfer of reasoning skills. On the true ⁄ false test, the scores of Year 3 students were significantly higher than those of students in the other three year groups. A positive correlation between SCT scores and true ⁄ false test scores was observed only for students in Years 3 and 4. In each group, the ascertainment degree scores were higher for correct than for incorrect responses and the difference was calculated as an index of self-estimation of core knowledge. This index was found to be positively correlated to SCT scores in the four year groups studied. CONCLUSIONS: Biomedical reasoning skills are evidenced early in a curriculum involving PBL and further increase during training. This is accompanied by a decrease in factual knowledge retention. The self-estimation of core knowledge appears to be related to reasoning capacity, which suggests there is a link between the two processes. [less ▲]Detailed reference viewed: 29 (14 ULg)
Le bm-573, un antagoniste original du récepteur au thromboxane a2, réduit le développement des lésions athéromateuses chez des souris déficientes en apolipoprotéine e (apo e-/-) contrairement a l’aspirine.
Cherdon, Céline ; ; Ooms, Annie et al
(2009, May 28)
Afin d’examiner l'efficacité de l’aspirine et du BM-573 dans l'athérogenèse, des souris apo E-/- femelles ont été traitées durant 10 et 20 semaines avec le BM-573 (10mg/kg/j), l’aspirine (30mg/kg/j) ou un ... [more ▼]
Afin d’examiner l'efficacité de l’aspirine et du BM-573 dans l'athérogenèse, des souris apo E-/- femelles ont été traitées durant 10 et 20 semaines avec le BM-573 (10mg/kg/j), l’aspirine (30mg/kg/j) ou un placébo. Au cours de cette expérience, aucune modification du poids corporel ou de la cholestérolémie n’a été observée. Par contre, le traitement des animaux par le BM-573, a eu pour effet de diminuer les lésions athéromateuses de manière significative tandis que l’aspirine a été sans effet sur ce paramètre. Ces données ont été confirmées par des analyses histopathologiques et biochimiques. Ces résultats confirment que l'antagonisme sélectif des récepteurs TP associé à une inhibition de la thromboxane synthétase réduit significativement les lésions athéromateuses chez les souris apo E-/-. Le BM-573 est, par conséquent, un agent thérapeutique potentiel pour la prévention de l'athérosclérose. [less ▲]Detailed reference viewed: 42 (12 ULg)
Evaluation biologique du stress oxydant : application en routine clinique.
Pincemail, Joël ; Le Goff, Caroline ; Charlier, Corinne et al
in Nutritions & Endocrinologie (2009), DécDetailed reference viewed: 152 (34 ULg)
Pseudoanevrisme de l'artere gastrique gauche.
Honore, Charles ; Bruyere, Pierre-Julien ; Maweja, Sylvie et al
in Journal de Chirurgie (2009), 146(4), 413-5
We report the case of a 65-year-old man admitted for an upper-GI hemorrhage. A CT scan performed with vascular reconstructions demonstrated a pseudoaneurysm of the left gastric artery. Proximal vascular ... [more ▼]
We report the case of a 65-year-old man admitted for an upper-GI hemorrhage. A CT scan performed with vascular reconstructions demonstrated a pseudoaneurysm of the left gastric artery. Proximal vascular control of the celiac axis was obtained by balloon occlusion with a Fogarty balloon inserted retrograde via the femoral artery: the pseudoaneurysm was then successfully controlled with direct suture. [less ▲]Detailed reference viewed: 67 (3 ULg)
Exercise-induced oxidative stress in overweight adolescent girls: roles of basal insulin resistance and inflammation and oxygen overconsumption.
; ; Pincemail, Joël et al
in International Journal of Obesity & Related Metabolic Disorders (2009), 33(4), 447-55
HYPOTHESIS: Basal insulin resistance (IR) and inflammation exacerbate post-exercise oxidative stress (OS) in overweight adolescent girls. DESIGN: Cross-sectional study, effect of incremental ergocycle ... [more ▼]
HYPOTHESIS: Basal insulin resistance (IR) and inflammation exacerbate post-exercise oxidative stress (OS) in overweight adolescent girls. DESIGN: Cross-sectional study, effect of incremental ergocycle exercise until exhaustion on OS markers. PARTICIPANTS: Normal-weight (control) (n=17, body mass index (BMI): 20-24.2 kg/m(2)) and overweight adolescent girls (n=29, BMI: 24.1-36.6 kg/m(2)). MEASUREMENTS: Dietary measurement, physical activity assessment (validated questionnaires), fat distribution parameters (by dual-energy X-ray absorptiometry and anthropometry) and maximal oxygen consumption (VO2peak). Blood assays include the following: (1) at fasting state: blood cell count, lipid profile, and IR parameters (leptin/adiponectin ratio (L/A), homeostasis model assessment of IR, insulin/glucose ratio; (2) before exercise: inflammation and OS markers (interleukin-6 (IL-6), C-reactive protein (CRP), myeloperoxidase (MPO), reduced glutathione/oxidized glutathione ratio (GSH/GSSG), 15 F(2)alpha-isoprostanes (F(2)-Isop), lipid hydroperoxides (ROOH), oxidized low-density lipoprotein (ox-LDL)) and antioxidant status (superoxide dismutase (SOD), glutathione peroxidase (GPX), vitamin C, alpha-tocopherol and beta-carotene); and (3) after exercise: inflammation and OS markers. RESULTS: At rest, overweight girls had a deteriorated lipid profile and significantly higher values of IR parameters and inflammation markers, compared with the control girls. These alterations were associated with a moderate rest OS state (lower GSH/GSSG ratio, alpha-tocopherol/total cholesterol (TC) ratio and GPX activity). In absolute values, overweight girls exhibited higher peak power output and oxygen consumption (VO2peak), compared with the control girls. Exercise exacerbated OS only in the overweight group (significant increase in F(2)-Isop, ROOH and MPO). As hypothesized, basal IR and inflammation state were correlated with the post-exercise OS. However, the adjustment of F(2)-Isop, ROOH and MPO variation per exercise VO(2) variation canceled the intergroup differences. CONCLUSION: In overweight adolescent girls, the main factors of OS, after incremental exhaustive exercise, are not the basal IR and inflammation states, but oxygen overconsumption. [less ▲]Detailed reference viewed: 48 (5 ULg)
Comparative antioxidant capacities of phenolic compounds measured by various tests
Tabart, Jessica ; Kevers, Claire ; Pincemail, Joël et al
in Food Chemistry (2009), 113
The purpose of this study was to compare the antioxidant capacities of standard compounds (phenolic compounds, ascorbic acid, and glutathione) as measured by various assays. Five methods were selected so ... [more ▼]
The purpose of this study was to compare the antioxidant capacities of standard compounds (phenolic compounds, ascorbic acid, and glutathione) as measured by various assays. Five methods were selected so as to span a diversity of technical approaches: TEAC (radical 2,2′-azino-bis(3-ethylbenzothiazoline)-6 sulphonic acid), DPPH (radical 2,2-diphenyl-1-picryhydrazyl used to measure reducing capacity), ORAC (oxygen radical scavenging capacity), red blood cell haemolysis (protection of biological sample), and ESR (electron spin resonance for direct free radical evaluation). Most compounds showed significant differences in free radical scavenging activity according to the method used. Of the 25 tested compounds, only a few, such as myricetin and gallocatechin, gave comparable activities in the various tests. To standardise reporting on antioxidant capacity, it is proposed to use a weighted mean of the values obtained using the DPPH, ORAC, resistance to haemolysis, and ESR assays. This strategy was used to test the antioxidant capacity of several beverages. The highest antioxidant capacity was observed for red wine, followed by green tea, orange juice, grape juice, vegetable juice, and apple juice. [less ▲]Detailed reference viewed: 241 (29 ULg)
Endovascular aneurysm repair (EVAR): does it fulfil all its promises?
Van Damme, Hendrik ; Creemers, Etienne ; Defraigne, Jean-Olivier
in Acta Chirurgica Belgica (2009), 109(4), 436-43
In the trend of the endovascular revolution for occlusive arterial disease, management of aneurysmal disease has known an analogous change in the nineties. Elective endo-aneurysmal stentgrafting (EVAR or ... [more ▼]
In the trend of the endovascular revolution for occlusive arterial disease, management of aneurysmal disease has known an analogous change in the nineties. Elective endo-aneurysmal stentgrafting (EVAR or endovascular aneurysm repair) is nowadays of widespread application in contemporary practice all over the world, sometimes by over-enthusiast proponents. There is a burden of recent publications on that topic. Critical analysis of relevant data reveal compelling evidence that elective EVAR is a safe procedure with a threefold reduced 30-day morbidity-mortality, when compared to conventional open aneurysm repair. EVAR also deemed efficace in terms of AAA rupture prevention. At the other hand, mid-term follow-up revealed that EVAR does not endure at the long-term in any late survival benefit, compared to open AAA repair. The major concern and drawback of EVAR is its higher cost and the need for indefinite, life-long surveillance, with a 20% reintervention rate (almost catheter-based endovascularly) at 5-year follow-up. In this review-paper, short-term gains of EVAR are balanced against the inherent disadvantages and long-term losses. According best available evidence, EVAR should not longer be the first choice for high-risk patients, judged unfit for open aneurysm repair. There also exist doubt on the use of EVAR in young fit patients with an anticipated long life expectancy. In approximately half of the AAA patients, EVAR can be considered as the appropriate treatment option. [less ▲]Detailed reference viewed: 59 (1 ULg)
Functional imaging of abdominal aortic aneurysms : can it predict probability of rupture.
Sakalihasan, Natzi ; Hustinx, Roland ; et al
in VASCULAR ANEURYSMS (2009)Detailed reference viewed: 20 (6 ULg)