Summary
Recombinant human erythropoietin (rhEpo) has been demonstrated in several studies to be effective in correcting the anemia of regular dialysis patients. This was accompanied by a significant improvement of the physical work capacity shown by exercise testing. The main side effect of rhEpo treatment has been the development or aggravation of hypertension in approximately 30% of the treated patients. In 2% hypertensive encephalopathy and convulsions occured. Data obtained by measurements of regional blood flow indicate the peripheral resistance did increase probably due to rise of blood viscosity and reversal of preexisting hypoxic vasodilatation. To avoid hypertensive complications anemia should be corrected slowly over a period of 12–16 weeks. Target hematocrit should not exceed 30–35 vol. %. Blood pressure and volume status should be monitored closely.
Zusammenfassung
Die Wirksamkeit von rekombinantem humanem Erythropoietin (rhEpo) bei der Korrektur der Anämie des terminal niereninsuffizienten dialysepflichtigen Patienten ist in mehreren Studien belegt. Eine deutliche Verbesserung der physischen Leistungsfähigkeit konnte durch ergometrische Untersuchungen dokumentiert werden. Neben seltenen Shunt-Thrombosen ist die einzige relevante unerwünschte Wirkung von rhEpo die Entwicklung oder Aggravierung einer Hypertonie bei etwa 30% der behandelten Patienten. Bei ca. 2% der Patienten kam es zur hypertensiven Enzephalopathie mit zentralnervöser Symptomatik. Als Ursache für diese Hypertonie-Entwicklung ist ein Anstieg des peripheren Widerstands anzunehmen. Belege dafür sind Messungen des regionalen Blutflusses mit Plethysmographie vor und nach Anämie-Korrektur mit rhEpo. Ursache für den Widerstandsanstieg wiederum dürfte eine Zunahme der Vollblutviskosität und eine Abnahme der peripheren hypoxiebedingten Vasodilatation sein.
Zur Prävention der hypertensiven Komplikationen bei rhEpo-Therapie werden eine langsame Hämatokrit-Korrektur über 12–16 Wochen und eine Begrenzung des Ziel-Hämatokrits auf 30–35 Vol. % bei strikter Blutdruck- und Volumenkontrolle empfohlen.
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Frei, U., Nonnast-Daniel, B. & Koch, K.M. Erythropoietin und Hypertonie. Klin Wochenschr 66, 914–919 (1988). https://doi.org/10.1007/BF01728954
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DOI: https://doi.org/10.1007/BF01728954