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  • 1
    ISSN: 1432-1084
    Keywords: Contrast media ; Comparative study ; Intravenous digital subtraction angiography ; Iodixanol ; Iopamidol ; Kidney function
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Iodixanol (visipaque, 320 mgI/ml) was compared with iopamidol (Solutrast, 370 mfI/ml) in a double-blind, randomized, parallel group, intravenous DSA phase-III trial for evaluation of safety and efficacy. A total of 117 patients received iodixanol (n = 60) or iopamidol (n = 57). Diagnostic efficacy was evaluated using categoric and visual analogue scales. Discomfort and adverse evenets were recorded. A total of 39 patients collected urine up to 72 h after the examination for analysis. Diagnostic efficacy and radiographic density were similar in both groups. Discomfort was milder with iodixanol. The difference between the frequency of adverse events between both groups (iodixanol = 7, iopamidol = 2) was without statistical significance. Creatinine clearance was slightly more affected by iodixanol, whereas the increase in renal excretion ofN-acetyl-beta-glucosaminidase (NAG) in the first 24 h collection period after the examination was significantly higher (p 〈 0.01) with iopamidol. Iodixanol was of equal diagnostic efficacy compared with iopamidol despite its reduced iodine content. Both contrast media are well suited for IV DSA.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neural transmission 34 (1973), S. 205-214 
    ISSN: 1435-1463
    Keywords: Aminosäuren ; Flimmerverschmelzungsfrequenz (FVF) ; Multiple Sklerose (MS) ; Neurotransmitter ; Überwärmungstest ; Amino-acids ; Flicker fusion ; hot bath test ; multiple sclerosis ; neurotransmitter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Patients with multiple sclerosis (MS) usually show a marked decrease in the visual flicker-fusion threshold (FFT or CFF “critical flicker-fusion frequency”), which remains liw even when clinical symptoms improve intermittently. Elevation of body temperature in MS patients aggravates their existing and sometimes reveals so far latent neurological symptoms, at the same time leading to a decrease of FFT. These alterations are reversible. We found that this decrease of FFT can be completely blocked by pre-test application of the amino-acids Tyrosin and Tryptophan, whereas other like Glutamin-acid and Asparagin-acid do not produce this effect. As only the first two are essential in the bio-synthesis of Adrenalin/Noradrenalin and Serotonin respectively results suggest a disturbance in the bio-synthesis of neuro-transmitters in MS. This may be of importance with regard to the general treatment of multiple sclerosis.
    Notes: Zusammenfassung Bei Multiple-Sklerose-(MS-)Patienten finden sich durchwegs stark verminderte Werte der Flimmerverschmelzungsfrequenz (FVF). Selbst bei klinisch voll remittierten Kranken bleibt die FVF — offenbar als Folge des zum Teil subklinisch verlaufenden Entmarkungsprozessesim pathologisch erniedrigten Bereich. Bei Wärmebelastungen kommt es — parallel zum Anstieg der Körpertemperatur — bei MS-Kranken zu einer Verschlechterung neurologischer Herdsymptome, zum Teil werden solche erst durch die Belastung manifest. Die FVF nimmt im Laufe der Belastung weiter ab. Diese für die MS charakteristischen Vorgänge sind passager und auf die Dauer der Erhöhung der Körpertemperatur beschränkt. Durch die vorherige Zufuhr der als Precursoren von Adrenalin und Noradrenalin bzw. Serotonin bekannten Aminosäuren Tyrosin bzw. Tryptophan gelingt es, das Absinken der FVF durch die Erwärmung vollkommen zu kupieren, während andere Aminosäuren, wie z. B. Glutaminsäure und Asparaginsäure, wirkungslos sind. Die Befunde sprechen für Störungen in den Neuro-Transmitter-Systemen bei der MS, deren Beseitigung möglicherweise auch für die Therapie der MS von Bedeutung sein könnte.
    Type of Medium: Electronic Resource
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