Abstract
Despite numerous therapeutic advances in critical care medicine, the treatment of patients with severe sepsis and septic shock remains a major medical challenge. In the pathogenetic course of systemic inflammation (SIRS), excessive release of endogenous and exogenous pro-inflammatory mediators such as lipopolysaccharides (LPS), tumor necrosis factor (TNF)-α, interleukin (IL)-1 and IL-6 occurs and multiple organ failure (MOF) develops. This leads to devastating clinical outcomes. In a complex dynamic control system, pro-inflammatory stimuli yield upregulation of anti-inflammatory mediators (IL-10, transforming growth factor-beta [TGF-β]) which induce a counter-regulatory anti-inflammatory response. This eventually yields monocytic deactivation leading to failure of the cell-mediated immune system (immunoparalysis).
To reduce levels of circulating inflammatory and anti-inflammatory mediators, various approaches have been investigated, including selective and unselective intermittent and continuous extracorporeal treatment devices. Today, new blood purification technologies such as selective plasmapheresis and adsorption techniques provide new therapeutic avenues to target key mediators in septic patients. In this review, current and future adjunctive extracorporeal treatment strategies are discussed in the context of recent clinical trials.
Zusammenfassung
Trotz zahlreicher Fortschritte in der Intensivmedizin stellt die Behandlung von Patienten mit schwerer Sepsis und septischem Schock eine medizinische Herausforderung dar. In der Pathogenese der systemischen Inflammation (SIRS) kommt es zur exzessiven Freisetzung von multiplen endogenen und exogenen inflammatorischen Mediatoren [z. B. Lipopolysaccharid (LPS), Tumor-Nekrose-Faktor (TNF)-α, Interleukin (IL)-1, IL-6] und zur Entwicklung eines Multi- Organ-Versagen (MOV). Dies führt bekanntermaßen zu schlechten Überlebenszahlen septischer Patienten. Ein komplexes dynamisches Kontrollsystem führt in der Abfolge meist zur zeitnahen gegen-regulatorischen antiinflammatorischen Antwort mittels Induktion anti-inflammatorischer Mediatoren (IL-10, transforming growth factor-beta [TGF-β]). In einer großen Anzahl septischer Patienten kommt es durch eine Persistenz des inflammatorischen Reizes zu einer Deaktivierung von antigenpräsentierenden Zellen bzw. zu einem Versagen des zellvermittelten Immunsystems („Immunparalyse“).
Unselektive und selektive intermittierende und kontinuierliche extrakorporale Therapieverfahren wurden evaluiert, ob diese in der Lage sind, in inflammatorische durch den klinischen Verlauf günstig zu beeinflussen. Technologische Fortschritte im Hinblick auf die Entwicklung von extrakorporalen Plasmapherese- bzw. Adsorptionsverfahren bieten heute neue, effektive Möglichkeiten, Mediatoren aus der Blutbahn septischer Patienten zu entfernen. In der vorliegenden Übersichtsarbeit werden aktuell verfügbare und zukünftige adjunktive extrakorporale Therapiestrategien vorgestellt und vor dem Hintergrund aktueller Studien diskutiert.
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Schefold, J.C., Hasper, D., Storm, C. et al. Die extrakorporale Therapie septischer Patienten. Intensivmed 44, 57–63 (2007). https://doi.org/10.1007/s00390-007-0758-x
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DOI: https://doi.org/10.1007/s00390-007-0758-x