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  • Digitale Medien  (2)
  • Flare  (1)
  • Questionnaire  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Archives of dermatological research 288 (1996), S. 436-441 
    ISSN: 1432-069X
    Schlagwort(e): Key words Histamine itch ; Wheal ; Flare ; Skin prick ; Iontophoresis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Correlations between the skin reactions wheal and flare and the subjectively reported degree of itch were investigated in response to 1% histamine, intradermally applied by standardized skin prick and by iontophoresis. Experiments were performed with 15 male volunteers using a threefold repeated measures design (skin prick, and iontophoresis with 0.13 mA for 10 s and with 2.0 mA for 10 s). Skin reactions (perpendicular diameters) were determined at the time of their maximum (10 min). Itch was rated on a computerized visual analogue scale which was anchored upon the individual scratch threshold. Most effective in producing itch was the skin prick which caused strong sensations markedly above the scratch threshold during the entire period of measurement (30 min), whereas iontophoresis induced only transient itch sensations. On the other hand, the largest wheals were generated by iontophoresis of both intensities (mean 10 or 14 mm vs 6 mm with skin prick). The higher current induced higher itch, wheal and flare responses, but after eliminating this effect of stimulus intensity, no correlations were found. In contrast, skin prick-induced flare reactions varied with the degree of itch above the scratch threshold ( r = 0.56; P 〈 0.01). Repeated measurements showed a higher stability for the itch reaction with skin prick compared with iontophoresis. It is hypothesized that in iontophoresis the brief (10-s) histamine bolus passed the most superficial pruritoceptive C fibres too quickly to induce long-lasting itch sensations, whereas the skin prick caused a deposit at the dermal-epidermal junction releasing histamine during the entire time of measurement. Consequently, both the C fibre-mediated itch and the axon reflex flare were more pronounced with the skin prick, and the wheal resulting from a permeability increase in the postcapillary venule walls was an independent phenomenon.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Der Hautarzt 48 (1997), S. 730-733 
    ISSN: 1432-1173
    Schlagwort(e): Schlüsselwörter Juckreiz ; Multidimensionaler Fragebogen ; Key words Itch ; Questionnaire
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary In dermatological practice, itch is the leading symptom of many skin diseases with a variety of psychophysiological aspects. However, a complete inventory for the qualitative evaluation of these central nervous factors is missing, whereas in pain research, the McGill Pain Questionnaire is well established for this purpose. Thus, therapeutic effects of antipruritic agents are only incompletely described by visual analog scales or parameters of skin physiology. Here, a questionnaire modified in analogy to the McGill pain questionnaire is presented, developed in cooperation between dermatologists and neurophysiologists.
    Notizen: Zusammenfassung Juckreiz stellt in der dermatologischen Praxis ein führendes Symptom mit vielen psychophysiologischen Facetten dar. Dennoch fehlt – im Vergleich zur Schmerzforschung, in der der McGill Pain Questionnaire inzwischen eine wichtige Routinefunktion hat – ein vollständiges Inventar zur qualitativen Erfassung dieser zentralnervösen Aspekte. So sind z.B. therapeutische Wirkungen nur unvollständig an Visual-analog-Skalen oder hautphysiologischen Parametern validierbar. In Ergänzung zu diesen Verfahren wird hier ein multidimensionaler Fragebogen als modifiziertes Analogon zum McGill Questionnaire vorgestellt, der in Zusammenarbeit von Hautklinik und Neurophysiologie entwickelt wurde.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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