Procalcitonin usefulness for the initiation of antibiotic treatment in intensive care unit patients*.LAYIOS, Nathalie ; LAMBERMONT, Bernard ; CANIVET, Jean-Luc et alin Critical Care Medicine (2012), 40(8), 2304-9 OBJECTIVES: : To test the usefulness of procalcitonin serum level for the reduction of antibiotic consumption in intensive care unit patients. DESIGN: : Single-center, prospective, randomized controlled ... [more ▼] OBJECTIVES: : To test the usefulness of procalcitonin serum level for the reduction of antibiotic consumption in intensive care unit patients. DESIGN: : Single-center, prospective, randomized controlled study. SETTING: : Five intensive care units from a tertiary teaching hospital. PATIENTS: : All consecutive adult patients hospitalized for > 48 hrs in the intensive care unit during a 9-month period. INTERVENTIONS: : Procalcitonin serum level was obtained for all consecutive patients suspected of developing infection either on admission or during intensive care unit stay. The use of antibiotics was more or less strongly discouraged or recommended according to the Muller classification. Patients were randomized into two groups: one using the procalcitonin results (procalcitonin group) and one being blinded to the procalcitonin results (control group). The primary end point was the reduction of antibiotic use expressed as a proportion of treatment days and of daily defined dose per 100 intensive care unit days using a procalcitonin-guided approach. Secondary end points included: a posteriori assessment of the accuracy of the infectious diagnosis when using procalcitonin in the intensive care unit and of the diagnostic concordance between the intensive care unit physician and the infectious-disease specialist. MEASUREMENTS AND MAIN RESULTS: : There were 258 patients in the procalcitonin group and 251 patients in the control group. A significantly higher amount of withheld treatment was observed in the procalcitonin group of patients classified by the intensive care unit clinicians as having possible infection. This, however, did not result in a reduction of antibiotic consumption. The treatment days represented 62.6 +/- 34.4% and 57.7 +/- 34.4% of the intensive care unit stays in the procalcitonin and control groups, respectively (p = .11). According to the infectious-disease specialist, 33.8% of the cases in which no infection was confirmed, had a procalcitonin value >1microg/L and 14.9% of the cases with confirmed infection had procalcitonin levels <0.25 microg/L. The ability of procalcitonin to differentiate between certain or probable infection and possible or no infection, upon initiation of antibiotic treatment was low, as confirmed by the receiving operating curve analysis (area under the curve = 0.69). Finally, procalcitonin did not help improve concordance between the diagnostic confidence of the infectious-disease specialist and the ICU physician. CONCLUSIONS: : Procalcitonin measuring for the initiation of antimicrobials did not appear to be helpful in a strategy aiming at decreasing the antibiotic consumption in intensive care unit patients. [less ▲] Detailed reference viewed: 15 (2 ULg) Multicentre Evaluation of a Second Generation Point-of-Care Assay with an Extended Range for the Determination of N-Terminal Pro-Brain Natriuretic Peptide; ; et al in Clinical Laboratory (2012), 58 Detailed reference viewed: 14 (0 ULg) Interpretation of serum PTH concentrations with different kits in dialysis patients according to the KDIGO guidelines: importance of the reference (normal) valuesCAVALIER, Etienne ; DELANAYE, Pierre ; VRANKEN, Laura et alin Nephrology Dialysis Transplantation (2012), 27 Background. The recommended target range for serum parathyroid hormone (PTH) in dialysis patients has changed from 150 to 300 pg/mL in the KDOQI guidelines to two to nine times the upper normal limit in ... [more ▼] Background. The recommended target range for serum parathyroid hormone (PTH) in dialysis patients has changed from 150 to 300 pg/mL in the KDOQI guidelines to two to nine times the upper normal limit in the KDIGO ones. Although inclusion/exclusion criteria for the reference population are highly important, they are usually not mentioned in the commercial kits. In this study, we used the same reference population of vitamin D-replete normal subjects to establish reference values for 10 commercial PTH kits. We evaluated whether this may improve the classification of dialysis patients according to the KDIGO compared to the use of reference values proposed by the manufacturers. Methods. We measured serum PTH with 10 different kits in 149 haemodialysis patients, and 240 25-OH-vitamin D-replete (>75 nmol/L) individuals with an estimated glomerular filtration rate >60 mL/min/1.73 m2. Results. For the 10 kits, our upper normal limit was lower than those of the manufacturers. The difference was, however, variable from one kit to another. The two kits that yielded the lowest and the highest absolute concentrations classified differently 84/149 patients (56.4%) according to the KDOQI and 53/149 (36.2%) according to the KDIGO using the manufacturers’ normal value.Using our normal values significantly decreased the discrepancies with 24/149 patients (16.1%) being still classified differently. Taking the measurement uncertainty into consideration, 8% of the patients only remained differently classified by these two kits. Conclusions. Using the same vitamin-D-replete population to establish the reference range for 10 commercial PTH kits significantly improved the classification of haemodialysis patients according to the KDIGO target range. [less ▲] Detailed reference viewed: 48 (5 ULg) Analytical evaluation of the new Abbott Architect 25-OH vitamin D assayCAVALIER, Etienne ; CARLISI, Ignazia ; BEKAERT, Anne-Catherine et alin Clinical Biochemistry (2012), 45 Objectives: Validation of the Architect 25-OH vitamin D assay. Design and methods: Determination of repeatability, reproducibility, accuracy profile and 25(OH)-vitamin D2 recovery on native samples ... [more ▼] Objectives: Validation of the Architect 25-OH vitamin D assay. Design and methods: Determination of repeatability, reproducibility, accuracy profile and 25(OH)-vitamin D2 recovery on native samples. Comparison with DiaSorin Liaison and RIA. Results and conclusion: Coefficients of variation: b6% (13.6 ng/mL) and 2.2% (78.1 ng/mL). Functional sensitivity: 5 ng/mL. Accuracy profile shows that the method is validated between 13.6 and 78.1 ng/mL. Recovery of 25(OH)D2: 75,8%( 95% CI: 61.9–89.7%). Good correlation with DiaSorin RIA and Liaison b50 ng/mL; above this threshold a systematic positive bias was observed. [less ▲] Detailed reference viewed: 42 (1 ULg) BNP et NT-proBNP: valeurs de référence et seuils décisionnelsTEIXEIRA, Jelda ; Guillaume, Michèle ; NELLESSEN, Eric et alin Revue Médicale de Liège (2012), 67(1), 38-43 Les peptides natriurétiques, en particulier BNP et NT-proBNP, sont de plus en plus utilisés comme tests de screening chez les patients avec suspicion d’insuffisance cardiaque (IC), afin d’éviter de ... [more ▼] Les peptides natriurétiques, en particulier BNP et NT-proBNP, sont de plus en plus utilisés comme tests de screening chez les patients avec suspicion d’insuffisance cardiaque (IC), afin d’éviter de recourir d’emblée à des examens spécialisés coûteux tels que l’échocardiographie. Très performants pour la valeur prédictive élevée d’un résultat négatif, permettant ainsi d’exclure l’IC chronique avec une forte probabilité, ces biomarqueurs sont également reconnus pour leur intérêt diagnostique dans cette pathologie. Des taux élevés de peptides natriurétiques sont corrélés avec un risque accru d’hospitalisation pour cause cardiovasculaire et de décès. La stratification du risque chez les patients présentant une insuffisance cardiaque est facilitée par l’utilisation de seuils décisionnels «bas» et «élevé», pour lesquels différentes valeurs ont été proposées dans la littérature. Le présent article a pour objet de faire le point sur le positionnement des seuils décisionnels eu égard aux valeurs de référence de NT-proBNP déterminées dans la population résidant en Province de Liège (Belgique). Les données ont été analysées en fonction de l’âge et du sexe des sujets, deux des facteurs majeurs de variation des concentrations plasmatiques des peptides natriurétiques. [less ▲] Detailed reference viewed: 46 (6 ULg) Comparison between the new AccuChek Inform II glucose meter and the Rapidlab 865 blood gas analyzer: implications for use of the Inform II in tight glycemic controlDE BACKER, Benjamin ; ; HALENG, Jeanine et alPoster (2011, October 15) Detailed reference viewed: 21 (4 ULg) Early assessment of myocardial injury by joint measurement of TnT-hs and CopeptinTEIXEIRA, Jelda ; WOTQUENNE, Pol ; D'ORIO, Vincenzo et alPoster (2011, October 15) Detailed reference viewed: 16 (3 ULg) New insights on the stability of the (1-84) PTH as determined with an automated 3rd generation PTH assayCAVALIER, Etienne ; CARLISI, Ignazia ; BEKAERT, Anne-Catherine et alin Clinical Chemistry (2011, October), 57(S10), 190 Detailed reference viewed: 8 (0 ULg) Analytical validation of Accu-check Inform II meters and strips before their use in the wards: pratical experience of the CHU de LiègeCAVALIER, Etienne ; PONCIN, Joseph ; MUSSO, Giuseppe et alin Clinical Chemistry (2011, October), 27(S10), 143 Detailed reference viewed: 30 (11 ULg) Impact of the use of the Manufacture's published reference range for PTH vs. the reference range established in the Laboratory for the classification of the haemodialyzed patients with the KDIGO GuidelinesCAVALIER, Etienne ; DELANAYE, Pierre ; VRANKEN, Laura et alin Clinical Chemistry (2011, October), 57(S10), 191 Detailed reference viewed: 13 (0 ULg) High sensitive troponin: pratical guidelinesChapelle, Jean-Paul ![]() Conference (2011, September 29) Detailed reference viewed: 5 (0 ULg) Automated Measurement of Total 25OH Vitamin D in the IDS iSYS SystemCAVALIER, Etienne ; BEKAERT, Anne-Catherine ; CARLISI, Ignazia et alPoster (2011, September 17) Detailed reference viewed: 20 (3 ULg) La troponine T ultrasensible : un nouvel outil diagnostic pour le médecin sportif?LE GOFF, Caroline ; Kaux, Jean-François ; GARWEG, Christophe et alin 4ème Congrès commun SFMS & SFTS (2011, September) Introduction : Le risque d’accidents cardiaques ou de mort subite après effort physique intense est bien connu. Ces évènements indésirables se produisent souvent chez des sujets présentant une maladie ... [more ▼] Introduction : Le risque d’accidents cardiaques ou de mort subite après effort physique intense est bien connu. Ces évènements indésirables se produisent souvent chez des sujets présentant une maladie coronarienne asymptomatique et ignorée. Néanmoins, vu ce risque, l’American Heart Association recommande de réaliser un screening cardiovasculaire chez les athlètes de tout âge. Dans cette optique, le dosage de marqueurs cardiaques de nouvelle génération, plus sensibles, comme la troponine T ultrasensible (hsTnT) peut certainement apporter des informations très intéressantes par la détection de dommages myocardiques mêmes mineurs. Matériels et méthodes : Des 20 sujets masculins volontaires âgés de 22.36±2.02 années, sédentaires, 8 ont dû être exclus (abandon, malaise à l’effort...). La VO2max a été préalablement déterminée lors d’un test à l’effort sur cycloergomètre une semaine avant le test afin de ne pas interférer avec les résultats de l’effort physique intense (EPI) pour lequel les sujets ont couru sur tapis roulant durant 1 heure à 75% de la VO2max. Quatre échantillons sanguins de 5 ml (tube hépariné-lithium) ont été prélevés : juste avant (T1), directement après (T2), 4 heures après (T3) et 24 heures après l’EPI (T4). Le dosage de hsTnT (Modular de Roche Diagnostic®) est réalisé sur du plasma par une technique d’électrocheminiluminescence. Résultats : Une augmentation statistiquement significative des résultats à T3 (p<0.01) est observée. L’élévation de la hsTnT est progressive pour atteindre un pic maximum à T3 et revenir dans les normes à T4. Le seuil critique de 0.03 ng/mL a été retenu et 75% des sujets présentent un taux supérieur à ce dernier à T3 (moyenne : 0.053 ng/mL), alors que 100% des sujets se trouvent en dessous de ce seuil à T1 (0.0041 ng/mL). Discussion - Conclusions : Ces résultats, extrêmement intéressants, suggèrent que la libération de hsTnT serait due soit à un processus physiologique de remodelage, soit à un processus irréversible de lésions au niveau des cardiomyocytes (nécrose). Il est également possible que cette élévation des troponines soit due à une libération à partir du pool cytosolique mais aussi elle peut être la conséquence de dommages membranaires potentiellement induits par le stress oxydatif. A l’issue de cette étude, nous démontrons que la hsTnT peut être un nouvel outil diagnostic dans le domaine de la cardiologie du sport. [less ▲] Detailed reference viewed: 141 (1 ULg) New insights on the stability of the (1-84) PTH as determined with an automated 3rd generation PTH assay.CAVALIER, Etienne ; CARLISI, Ignazia ; BEKAERT, Anne-Catherine et alPoster (2011, July 28) Detailed reference viewed: 21 (0 ULg) Impact of the use of the Manufacturer's published reference range for PTH vs. the reference range established in the Laboratory for the classification of the haemodialyzed patients with the KDIGO Guidelines.CAVALIER, Etienne ; DELANAYE, Pierre ; Vranken, Laura et alPoster (2011, July 28) Detailed reference viewed: 22 (0 ULg) Analytical validation of Accu-check Inform II meters and strips before their use in the wards: practical experience of the CHU de Liège.CAVALIER, Etienne ; PONCIN, Joseph ; MUSSO, Giuseppe et alPoster (2011, July 27) Detailed reference viewed: 18 (4 ULg) Use of a novel high-sensitivity troponin T, I and MPO, NT-proBNP assays to detect myocardial injury in patients with atrial fibrillation treated by direct-current cardioversionLE GOFF, Caroline ; GARWEG, Christophe ; Kaux, Jean-François et alin Clinical Chemistry & Laboratory Medicine (2011, May), 49(Special Suppl), 312 Detailed reference viewed: 24 (4 ULg) Elevation of cardiac and oxidative stress biomarkers after a running activity in sedentary subjectsLE GOFF, Caroline ; Bury, Thierry ; Rodriguez de la Cruz, Carlos et alin Clinical Chemistry & Laboratory Medicine (2011, May), 49(Special Suppl), 313 Detailed reference viewed: 69 (9 ULg) Fatty acids and cardiovascular riskLE GOFF, Caroline ; ; Kaux, Jean-François et alin Clinical Chemistry & Laboratory Medicine (2011, May), 49(Special Suppl), 313 Detailed reference viewed: 26 (8 ULg) Fatty acids determinations: an cardiovascular risk? Preliminary resultsLE GOFF, Caroline ; ; Pincemail, Joël et alin Biomedica - Life Science Summit (2011, April 07) Detailed reference viewed: 16 (9 ULg) |
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