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  • Adaptive segmentation  (1)
  • Aktivkohle  (1)
  • Endogene Stoffwechselprodukte  (1)
  • Hemoperfusion  (1)
  • 1
    ISSN: 1432-1440
    Keywords: Absorption ; Activated charcoal ; Endogenous metabolites ; Hemoperfusion ; Hepatic coma ; Intoxication ; Liver insufficiency ; Portocaval encephalopathy ; Toxic substances ; Absorption ; Aktivkohle ; Coma hepaticum ; Endogene Stoffwechselprodukte ; Giftsubstanzen ; Hämoperfusion ; Intoxikation ; Leberinsuffizienz ; Portocavale Encephalopathie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die von Chang entwickelte Methode, artefizielle Zellen — in Kollodium und Albumin verkapselte Aktivkohle — zur Hämoperfusion einzusetzen, wurde in vitro studiert. Geprüft wurde die Kapazität zur Adsorption von schlecht wie gut dialysablen Substanzen (Barbiturate, Diazepam, Parathion) und einem endogen toxischen Metaboliten (p-Hydroxyphenylessigsäure). — Mit der Adsorptions-Einheit lassen sich in 90 min 80–90% der Ausgangskonzentrationen von Barbiturat, Diazepam und p-Hydroxyphenylacetat eliminieren, von Parathion etwa 50%, Bromid und Ammoniak werden nicht adsorbiert. Versuche, durch den Einbau von Heparin in die Hülle der Kohlegranula die regionale Heparinisierung unnötig zu machen, waren erfolglos. Bei sachgemäßer Herstellung des Shunt-Systems, Einhaltung steriler Kautelen und regionaler Heparinisierung ist der Einsatz des „Entgiftungs-Shunts“ eine vielversprechende Möglichkeit zur Therapie schwerer exogener und endogener Intoxikationen, die einer konventionellen Therapie nicht zugänglich sind.
    Notes: Summary The method developed by Chang for using in collodion and albumin encapsuled charcoal as artificial cells for hemoperfusion has been studied in vitro. The capacity for the absorption of more or less dialysable exogenous substances (barbiturate, Diazepam, Parathion) and an endogenous toxic metabolite (p-hydroxyphenyl acetic acid) has been examined. With the absorption unit one can eliminate 80 to 90 per cent of the initial concentration of barbiturate, Diazepam and p-hydroxyphenyl acetic acid in about 90 min, of Parathion about 50 per cent in the same time, whereas bromide and ammonia are not absorbed. Attempts to avoid regional heparinisation by the incorporation of heparin into the capsule of charcoal granules were not successful. Assuming correct preparation of the hemoperfusion system, observance of steril precoutions and regional heparinisation, the use of the “detoxication shunt” is a promising means in the treatment of severe exogenous and endogenous intoxications which are not accessible by conventional therapeutic means.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 246 (1996), S. 310-316 
    ISSN: 1433-8491
    Keywords: Gilles de la Tourette syndrome ; EEG ; Adaptive segmentation ; Physiology ; Functional neuroimaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Quantitative analysis of scalp EEGs was performed on 13 patients with Gilles de la Tourette syndrome (GTS) and 25 matched controls. The analysis method was adaptive segmentation, which describes the topography and sequence of brain electric fields in continuous EEG. The GTS patients showed an abnormal increase in fields with a right-frontal/left-posterior configuration. The GTS patient's EEGs did not differ from normal controls in the average duration of the brain electric microstates, field stability and EEG carrier frequency. To find out whether the abnormal activity is similar to movement-related activity a simple and a complex motor task were performed. Both tasks led to distinct changes of brain electric activity, but not to an increase in right-frontal-/left-posterior-oriented patterns. Motor-related activity was contrasted with two auditory tasks. We conclude that GTS patient's EEG show abnormal topographic patterns of brain electric activity. Unlike other psychiatric disorders, the temporal descriptors of the EEG aspects are unaffected. The abnormal EEG patterns in GTS patients are not similar to those elicited by simple or complex movements; thus, the presence of abnormally facilitated, near-threshold motor activity in GTS patients seems not a likely explanation.
    Type of Medium: Electronic Resource
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