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  • Title: [Motor nerve conduction velocity in uraemic polyneuropathy: correlation with metabolic factors (author's transl)].
    Author: Mamoli B, Kopsa H, Maly J, Pateisky K, Gerstenbrand F, Kotzaurek R.
    Journal: Wien Klin Wochenschr; 1976 Dec 10; 88(23):770-4. PubMed ID: 1014710.
    Abstract:
    The following parameters have been examined in twenty-one patients suffering from chronic renal failure (creatinine level between 4.5 and 18.8 mg/100 ml serum): maximum motor nerve conduction of the peroneal nerve, amplitude of the compound muscle action potential of the extensor digitorum brevis muscle, serum creatiine, total protein, serum globulins, serum albumins, alkali reserve, time of increase of serum creatinine above 4 mg/100 ml up to time of determination of the maximum motor nerve conduction, daily urinary excretion, mean blood pressure, (p less than 0.01) was found between maximum motor nerve conduction, as well as amplitude of the compound muscle action potential, and the serum albumin level only. Decreased levels of serum albumin, is correlated with diminished nerve conduction and a lower amplitude. The relationship between the electrophysiological data and serum albumin levels maybe explained on the basis of progression of a pre-existing polyneuropathy due to additional dietary malnutrition. A different interpretation is the assumption of an inactivation of neurotoxin on binding by albumins. A decrease in the albumin level would, therefore, result in an increased amount of unbound toxic agent. The values of the maximum motor nerve conduction were between 16 m/sec and 51 m/sec (mean value 42.2 m/sec), pointing to a polyneuropathy of primary axonal type rather that to primary demyelinization. The amplitudes of the compound muscle action potentials were not greatly reduced and thus the uraemic polyneuropathy seems to be of mixed type. In uraemic polyneuropathy different aetiological factors have to assumed. According to the prevalent factor a polyneuropathy of predominantly axonal or predominantly demyelinizing type may result.
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