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  • 1
    ISSN: 1432-5233
    Schlagwort(e): Distal polyneuropathy ; Electroneurography ; Diagnostic criteria ; Vibration sensitivity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The diagnostic procedures recommended for diabetic neuropathy are rather complex and there is the risk that they may be applied only in highly specialized research centres and not in other more basic health service centres that recruit large numbers of diabetic patients. This consideration highlights the need for rapid and precise diagnostic procedures for the screening and follow-up of diabetic patients. In this paper we describe a simplified diagnostic protocol for distal polyneuropathy (DP), which is the most common form of peripheral neuropathy associated with diabetes. We performed an electronneurographic examination (ENG) based on a five-nerve evaluation in 204 diabetic subjects, and took it as the standard. Its reproducibility preliminarily assessed with a test-retest evaluation was 100%. DP was found in 47 of the 204 diabetic patients on the basis of an alteration in at least two nerves. Other clinical parameters, including a questionnaire on symptoms, a clinical neurological examination (NE), and the vibration perception threshold (VPT) were evaluated. The variability coefficient was not significant for all clinical parameters in a selected group of diabetic patients (questionnaire = 21,2%, NE=5%, VPT=16.5%). The sensitivities and specificities of the questionnaire, NE, and VPT in comparison with ENG were 87% and 60% for the questionnaire, 94% and 92% for NE, and 64% and 97% for VPT, respectively. Thus, the use of ENG permitted the recognition of DP in 14% of patients who were still asymptomatic. Finally, a four-nerve ENG was compared with the five-nerve procedure, and the concordance between the two tests was 100%.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1573-5117
    Schlagwort(e): Mysidacea ; cadmium ; toxicology ; opossum shrimp ; Mysidopsis bahia ; Mysidopsis bigelowi
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Two species of mysid shrimp, the sub-tropicalMysidopsis bahia and the northern temperateMysidopsis bigelowi, were exposed simultaneously to cadmium (as CdCl2) in a continuous-flow bioassay system to determine the effect on survival and reproductive success. Temperature and salinity were maintained at 21 ± 1°C and 30‰,respectively. The 96-h LC50 was 110 µg ℓ−1 for both species. The 23-day life cycle LC50 forM. bahia was 19.5 µg ℓ−1 and forM. bigelowi the 27-day LC-50 was 14.8 µg ℓ−1. At 10 µg ℓ−1 a series of morphological aberrations were observed in both species at the onset of sexual maturity. Carapace malformations apparently prevented molting after the release of the initial brood and resulted in death of brooding females. As a result, although the initial reproductive rate at this concentration was successful, successive broods could not be produced. For both species in this study the no observed effect concentration was 5.1 µg ℓ−1; the effect concentration was 10.0 µg ℓ−1. Mechanisms were postulated in this study to explain the effect of cadmium on the molting process and on calcification and enzymatic reactions of osmosis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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