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  • 1
    ISSN: 1432-0584
    Keywords: Thrombin-antithrombin III complex ; Prothrombin fragment 1+2 ; Blood withdrawal technique ; Catheter ; Venipuncture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To evaluate the influence of different blood sampling techniques on test results of thrombin-antithrombin III complex (TAT) and prothrombin fragment 1+2 (F1+2) serial determinations were performed. In six groups of nonrandomized patients (ten patients each) the concentrations of the coagulation markers of blood samples from central catheters (internal jugular, caval, Shaldon, pulmonary artery) and peripheral cannulas (17G and 18G) were compared with those of blood samples obtained simultaneously from direct venipunctures of the contralateral arm. Medians and 25th–75th percentiles of TAT and Fl+2 concentrations of plasmas obtained from central catheters were not different from those taken from venipunctures. When Δ mean values (catheter — venipuncture) were calculated negative results were obtained, indicating lower concentrations measured from blood sampled through central catheters with the exception of blood that taken from Shaldon catheters. Only for TAT concentrations significantly were lower values measured in blood samples taken from internal jugular catheters when compared with blood samples obtained from direct venipunctures. Significantly higher TAT concentrations were determined in blood samples obtained from Shaldon catheters. For both coagulation markers correlations were found between concentrations in blood samples from central catheters and venipunctures. In blood samples taken from peripheral venous cannulas only F1+2 concentrations correlated with the concentrations found in samples from direct venipuncture. In contrast to F1+2, TAT concentrations measured from blood samples via peripheral cannulas were determined significantly higher than those taken from direct venipunctures. Blood drawn from peripheral catheters is not suited for the determination of TAT and F1+2 due to frequently encountered activation of coagulation, while blood sampling with central catheters can be regarded as an alternative to venipuncture.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Creatine kinase, isoenzymes ; Creatin kinase, isoenzyme-MB ; Antibodies, inhibiting ; Kinetic enzyme activity determination ; Myocardial infarction ; Creatinkinase-Isoenzyme ; Creatinkinase-Isoenzym MB ; Antikörper, inhibierende ; Enzymaktivitäts-Bestimmung, kinetische ; Myokardinfarkt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über eine neue Methode zur quantitativen Bestimmung der Creatinkinase MB-Aktivität im Serum berichtet. Die Methode beruht auf einer direkten Messung der Aktivität der Creatin-kinase-Untereinheit B nach Hemmung der Aktivität der Creatinkinase-Untereinheit M durch inhibierende Antikörper und benötigt zur Durchführung 15 min. Bei allen 83 untersuchten Patienten mit klinisch gesichertem Myokardinfarkt konnten zwischen der 6. und 28. Stunde nach Infarkteintritt Creatinkinase MB-Aktivität gemessen werden. Der Creatinkinase MB-Anteil zum Zeitpunkt der höchsten Creatinkinase-Gesamtaktivität betrug 6–17%, im Mittel 8%. Diese Methode ermöglicht daher in der Notfalldiagnostik eine Differentialdiagnose unklarer Creatinkinase-Gesamtaktivitäts-Erhöhungen.
    Notes: Summary A new method for the determination of creatine kinase-MB activity in the serum is presented. The principle of this method is the direct measurement of the activity of creatine kinase M subunits by inhibiting antibodies. The total test procedure takes 15 min. In the sera of all the 83 patients tested, who have clinically proven myocard infarction, creatine kinase-MB activity can be measured between the 6th and 28th hour after infarction. At the time of maximum total creatine kinase activity the percentage of creatine kinase-MB activity is between 6 and 17%, the mean value being 8%. In cases of emergency this method can be used for the differential diagnosis of elevated total creatine kinase activities of unknown origin.
    Type of Medium: Electronic Resource
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