[Erythrokinetic studies in the lead poisoning (author's transl)].
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Biomedical subjects
Publications and source records attributed to A Borghetti.
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A case of hypokalaemia due to chronic administration of Clortalydone is reported. The histochemistry of muscle biopsy showed the morphologic changes which are usually found in the muscle fibers of periodic familial paralysis (necrotic fibers, accumulation of PAS positive substance, inflammatory cells, intermyofibrillar network degeneration, increase of lipids content). Such findings suggest some clues to the pathophysiology of the essential hypokalaemic paralysis and the possible practical importance of these histopathologic muscular findings in the diagnosis of secondary hypokalaemia.
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The behaviour of blood sugar, insulin plasma free fatty acids and glycerol was studied at various times after intravenous glucose loading in patients with chronic renal insufficiency and normal subjects. Conard's K (glycide assimilation) coefficient was also determined. A statistically significant difference was observed between the two groups in the case of the K values only. No difference was noted in the case of the other parameters. The existence of two distinct groups within the subjects with chronic insufficiency, one with normal and one with altered K values, was also noted. The main physiopathological mechanisms probably responsible for this are discussed. It is considered that glucose loading is less sensitive i.v. than per os in the study of glycolipid metabolism in chronic renal insufficiency.
The plasma concentration and urinary excretion after a single 500 mg dose of Aminosidine have been studied in 12 patients with different degrees of renal failure and 4 normal subjects. In normal subjects the plasma half-life is 2.47 hr; in patients with creatinine clearance (Ccr) of 30-60 ml/min, its 6.7 hrs.; in patients with Ccr of 10-30 ml/min, it is 16.7hrs.; in patients with Ccr less than 10 ml/min, it is 36.6 hrs. A dose of 0.5 g of Aminosidine should be given to normal subjects every 12 hr. When renal function is reduced, the interval (in hr) between doses should be the following: Ccr 60-40 ml/min: 19-28;Ccr 40-30 ml/min; 28-35; Ccr 30-20 ml/min: 35-47; Ccr 20-10 ml/min: 47; Ccr less than 10 ml/min: 76.
The present paper reports some aspects of glycolipid metabolism observed during and after dialysis of varying duration, and the effects of glucose content in dialysis fluid. Some substances used in dialysis interfere with glycolipid metabolism: heparin (Robinson and French, 1960; Wolff and Wolff, 1960); sodium acetate (Bloch, 1947; Ghosal et al, 1969; Mion et al, 1964); and glucose in high (Leonards et al, 1961; Mendelssonhn et al, 1967) or low concentrations (Drukker et al, 1964; Hagstam et al, 1969) or, more recently, completely eliminated (Alwall et al, 1970; Hubner et al, 1971).
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