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  • Carnitin therapy  (2)
  • Kontraindikationen  (2)
  • Cell wall  (1)
  • 1
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Valproat ; Leberversagen ; Laborparameter ; Karnitintherapie ; Kontraindikationen ; Key words Valproate ; Hepatic failure ; Laboratory tests ; Carnitin therapy ; Contraindications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Valproate is a frequently used antiepileptic drug. It is associated with rare but serious adverse effects like liver failure. The first symptom is impairment of the patient’s well being. Isolated changes of standard laboratory liver parameters are not reliable early indicators. Thus, according to the knowledge of today, prophylactic blood screening cannot predict complications. On the contrary, clinical symptoms are the most relevant indicators of impending complications, eventually supported by laboratory findings. Therapy: An abrupt withdrawal of valproate and administering carnitin in parallel can interrupt the otherwise fatal course of the complication and induce a subsequent recovery. At a Consensus Conference the current knowledge about early detection and therapy of the valproate-induced serious hepatotoxicity was discussed. The results regarding recommended laboratory screening, as well as diagnostic and therapeutic strategies are reported.
    Notes: Zusammenfassung Valproat ist ein weitverbreitetes Antiepileptikum mit einem breiten Indikationsspektrum, bei dessen Anwendung seltene, aber schwere Nebenwirkungen wie das Valproat-assoziierte Leberversagen auftreten können. Erstes Symptom ist dabei eine Befindlichkeitsstörung des Patienten. Isolierte Veränderungen von Standardlaborparametern der Leber sind kein Frühindikator. Eine frühzeitige Diagnostik der Komplikation ist daher nach heutigem Wissensstand durch prophylaktische Laborkontrollen nicht möglich. Entscheidend ist die rechtzeitige Erkennung der beginnenden Komplikation auf der Basis klinischer Kriterien, u.U. bei gleichzeitig veränderten Laborparametern. Therapie: Ein sofortiges Absetzen der Valproinsäure und die gleichzeitige Gabe von Karnitin kann zu einer Unterbrechung des sonst fatalen Ablaufs der Komplikation mit anschließender Erholung führen. Im Rahmen einer Konsensuskonferenz wurden der aktuelle Wissensstand über die Früherkennung und die Therapie der VPA-induzierten Hepatotoxizität diskutiert. Die Ergebnisse des Konsensus wurden mit dem Ziel einer Verbesserung der Arzneimittelsicherheit in einer Empfehlung über Laborkontrollen, Frühdiagnostik und Therapie zusammengefaßt.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Valproat ; Leberversagen ; Laborparameter ; Carnitintherapie ; Kontraindikationen ; Key words Valproate ; Hepatic failure ; Laboratory tests ; Carnitin therapy ; Contraindications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Valproate is a frequently used antiepileptic drug. It is associated with rare but serious adverse effects like liver failure. The first symptom is impairment of the patient’s well being. Isolated changes of standard laboratory liver parameters are not reliable early indicators. Thus, according to the knowledge of today, prophylactic blood screening cannot predict complications. On the contrary, clinical symptoms are the most relevant indicators of impending complications, eventually supported by laboratory findings. An abrupt withdrawl of valproate and administering carnitin in parallel can interrupt the otherwise fatal course of the complication and induce a subsequent recovery. At a Consensus Conference the current knowledge about early detection and therapy of the valproate-induced serious hepatotoxicity was discussed. The results regarding recommended laboratory screening, as well as diagnostic and therapeutic strategies are reported.
    Notes: Zusammenfassung Valproat ist ein weitverbreitetes Antiepileptikum mit einem breiten Indikationsspektrum, bei dessen Anwendung seltene, aber schwere Nebenwirkungen wie das Valproat-assoziierte Leberversagen auftreten können. Erstes Symptom ist dabei eine Befindlichkeitsstörung des Patienten. Isolierte Veränderungen von Standardlaborparametern der Leber sind kein Frühindikator. Eine frühzeitige Diagnostik der Komplikation ist daher nach heutigem Wissensstand durch prophylaktische Laborkontrollen nicht möglich. Entscheidend ist die rechtzeitige Erkennung der beginnenden Komplikation auf der Basis klinischer Kriterien, u.U. bei gleichzeitig veränderten Laborparametern. Ein sofortiges Absetzen der Valproinsäure und die gleichzeitige Gabe von Carnitin kann zu einer Unterbrechung des sonst fatalen Ablaufs der Komplikation mit anschließender Erholung führen. Im Rahmen einer Konsensuskonferenz wurden der aktuelle Wissensstand über Früherkennung und Therapie der VPA-induzierten Hepatotoxizität diskutiert. Die Ergebnisse des Konsensus wurden mit dem Ziel einer Verbessung der Arzneimittelsicherheit in einer Empfehlung über Laborkontrollen, Frühdiagnostik und Therapie zusammengefaßt.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2048
    Keywords: Alginate ; Cellulose ; Cell wall ; Crystalline allomorphs ; Hydrodynamics ; Phaeophyta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract To test whether secondary and tertiary structures of marine-algal structural polysaccharides may be altered during adaptive responses to hydrodynamic stresses, juvenile Egregia menziesii (Turn.) Aresch. sporophytes were cultured under three different regimes: (i) low-energy (LE) specimens were subjected to water motion produced by standard bubbling and circulation of tank water; (ii) high-energy (HE) specimens received additional movement in pumped streams of water; and (iii) stretched (STR) specimens were grown under low-energy conditions but also were subjected to constant, longitudinal tension (0.7 N). After 6–10 weeks growth, cell-wall structural polysaccharides from specimen blades were isolated by solubilizing less-ordered matrix polysaccharides. Neutral-sugar and uronic acid contents of these isolates were measured, and samples were analyzed by x-ray diffraction and by Raman and 13C-nuclear magnetic resonance (NMR) spectroscopy. On average, structural polysaccharides formed about 7.2% of dry-weight biomass. The portion of isolated mass accountable to neutral sugars ranged from an average of 85% for STR sporophytes to 94% for both LE and HE specimens. For all specimens, glucose composed an average of 99% of this fraction. Uronic acids could not be detected in isolates from any treatment group. Cellulose dominance in each isolate was indicated clearly in x-ray diffraction patterns and in Raman and 13C-NMR spectra. These data further demonstrated that both the cellulose I allomorph and the disordered form of the polymer were present in each isolate and that the STR isolate contained small quantities of the cellulose II allomorph. In general, the LE and HE samples had very similar crystallinity; lateral order was slightly more developed in LE samples. However, the STR treatment produced cellulose with lowest crystallinity and least lateral order. Results suggest that mechanical stress modified cellulose crystallinity in these kelps by altering levels of disordered cellulose and lateral dimensions of cellulose crystallites and, in one instance, changed the crystallinity qualitatively. Physical disturbances to cell plasma membranes may have instigated these trends. In the STR specimens in particular, such disturbances might have been supplemented by fundamental changes to kelp physiology, affecting both substantial decreases in crystallinity and production of the cellulose II allomorph. Changes in the nature of the cellulose cannot, however, account for changes in the elastic moduli.
    Type of Medium: Electronic Resource
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