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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 60 (1982), S. 61-69 
    ISSN: 1432-1440
    Keywords: Hemostasis ; Hematocrit ; Polycythemia ; Congenital heart disease ; Hämostase ; Hämatokrit ; Polyglobulie ; Angeborene Herzfehler
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer prospektiven Studie wurden bei 500 Patienten mit angeborenen Herzfehlern, davon 55% mit azyanotischen und 45% mit zyanotischen Vitien, die Thrombozytenzahl, einige Globaltests der plasmatischen Gerinnung (Quick-Wert, partielle Thromboplastinzeit, Thrombinzeit) und des Vollblutes (Thrombelastogramm) sowie der Proaktivator-Plasminogen-Komplex als Parameter der Fibrinolyse-Aktivität im Vollblut untersucht. Die Ergebnisse wurden nach Herzfehlertyp (azyanotisch/zyanotisch), Lebensalter (Neugeborene/Säuglinge/Kinder) und Hämatokrit-Bereichen (bis 40%/41–50%/51–60%/über 60%) gruppiert. Die Signifikanz zwischen den einzelnen Gruppen wurde mit Hilfe der Varianz-Analyse, die Korrelation der Parameter zum Hämatokrit-Wert mit Hilfe der linearen Regression berechnet. Bei azyanotischen Herzfehlern lagen die untersuchten Hämostase-Parameter im Normbereich, während bei zyanotischen Herzfehlern die Mittelwerte der Thrombozytenzahl, der plasmatischen und der Vollblut-Gerinnung sowie des Proaktivator-Plasminogen-Komplexes mit zunehmendem Lebensalter zum pathologischen Bereich tendierten; die niedrigsten Werte fanden sich im Neugeborenenalter, und zwar ohne Abhängigkeit vom Herzfehlertyp, wobei ursächlich die altersphysiologische Unreife des Gerinnungssystems anzuschuldigen ist. Bei Patienten mit zyanotischen Herzfehlern nahm die Gerinnbarkeit des Vollblutes mit zunehmender Polyglobulie kontinuierlich ab, während die Parameter der plasmatischen Gerinnung bis zu Hämatokrit-Werten von 60% durchaus im Normbereich blieben; eine ausreichende Korrelation der Hämostase-Parameter zum Schweregrad der Polyglobulie war nur für Patienten mit Hämatokrit-Werten über 60% nachzuweisen. Auch die Fibrinolyse-Aktivität im Vollblut war bei zyanotischen Patienten generell und ohne gesetzmäßige Abhängigkeit vom Lebensalter vermindert und nahm entgegen dem Anstieg des Hämatokrit-Wertes deutlich ab; dieses Verhalten spricht genen die in der Literatur vielfach diskutierte Steigerung der Fibrinolyse-Aktivität bei zyanotischen Patienten, welche allerdings von anderen Autoren nur im Plasma und nicht im Vollblut bestimmt wurde. Es empfiehlt sich daher, bei höhergradiger Polyglobulie Gerinnung und Fibrinolyse vorzugsweise im Vollblut zu untersuchen und nach den hier gefundenen, hämatokrit-bezogenen Richtwerten zu beurteilen, insbesondere vor diagnostischen und chirurgischen Eingriffen. Eine Behandlung mit gerinnungsaktiven Medikamenten ist streng zu indizieren; bei extremer Polyglobulie mit Hämatokrit-Werten über 70% können therapeutische Erythropheresen im Rahmen der präoperativen Vorbereitung Rheologie und Hämostase-Parameter kurzfristig verbessern.
    Notes: Summary To assess blood coagulation and fibrinolytic activity in congenital heart disease, the platelet count, plasma clotting times (thromboplastin time, partial thromboplastin time, thrombin time) as well as the coagulation (thrombelastography) and activity of the proactivator-plasminogen-complex of whole blood were determined prospectively in 500 patients; 55% of whom had acyanotic and 45% cyanotic lesions. The results were compared with respect to the type of lesion (with or without cyanosis), the age of the patient (newborn, infant or child) and four sequential ranges of hematocrit (less than 40%, 41% to 50%, 51% to 60% and greater than 60%). Statistical analysis and significance testing were performed to evaluate differences between the groups and to assess the relationship of the respective parameters with the hematocrit value. In acyanotic congenital heart disease all values were within normal limits. In contrast, in the cyanotic group, the average platelet count, the coagulation of plasma and whole blood as well as the fibrinolytic activity showed a decreasing tendency with increasing age. Regardless of the type of lesion, the lowest values, attributable to immature coagulation systems, were observed in newborns. In patients with cyanosis the clotting of whole blood declined proportionally with increasing hematocrit while plasma clotting remained normal with hematocrit values up to 60%. A significant correlation between pathologic hemostasis and the severity of polycythemia could only be established in patients with hematocrit values in excess of 60%. The cyanotic patients also showed diminished fibrinolytic activity which was independent of age, but decreased with increasing hematocrits. This finding is at variance with that of some other investigators, but this may be due to the fact that the latter reports dealt only with fibrinolytic activity in plasma and not that of whole blood. Thus, in advanced polycythemia, assessment of coagulation and fibrinolytic activity, which is particularly critical prior to invasive diagnostic or surgical intervention, should be interpreted with respect to the hematocrit-related values as shown in this study. The use of drugs which alter the hemostatic system requires judicious indication. In severe polycythemia with hematocrit values in excess of 70%, therapeutic erythropheresis may render transient improvement in rheological and clotting conditions for preoperative management.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Surface & Coatings Technology 54-55 (1992), S. 148-153 
    ISSN: 0257-8972
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 30 (1974), S. 793-796 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 2322-2325 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 2325-2328 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 29 (1973), S. 2260-2263 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1971
    Keywords: Aortic arch anomalies ; Aortic arch interruption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The chances of survival for patients with interruption of the aortic arch depend mainly on early recognition and medical treatment before symptoms of cardiogenic shock appear, and specifically on early operative repair after the exact diagnosis has been established. Accurate angiography with visualization of the interrupted aortic arch and delineation of associated cardiac malformations is of prime importance for the surgical management and prognosis. Among our 36 patients with interrupted aortic arch, 27 were operated on. The operative mortality in 22 patients with associated ventricular septal defect (VSD) and persistent ductus arteriosus (PDA) was reduced from 43% (in seven patients seen up until 1979) to 7% (in 15 patients seen since 1980). One patient with interrupted aortic arch type C and another infant with associated truncus arteriosus were successfully corrected on day 9 and day 17 of life, respectively. In the patients with associated VSD and PDA as well as in the one patient with associated truncus arteriosus, the primary correction—direct anastomosis of the interrupted segments without prosthesis and VSD closure and in the case with truncus, the additional positioning of a valve-bearing allograft conduit from the right ventricle to the pulmonary artery—has been more successful than a two-step approach with initial pulmonary artery banding.
    Type of Medium: Electronic Resource
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