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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 58 (1980), S. 1065-1069 
    ISSN: 1432-1440
    Keywords: CAPD ; Glukose ; Insulin ; Lipoproteine ; Aminosäuren ; CAPD ; Glucose ; Insulin ; Lipoprotein ; Amino acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Biochemical studies are being performed in chronically renal insufficient patients undergoing treatment by CAPD. Serum protein and albumin levels have remained stable during treatment as have the ratios of essential/non-essential amino acids and valine/glycine in plasma. Dietary intake therefore appears to adequately compensate dialysate losses. Serum calcium and phosphate as well as immunoreactive parathyroid hormone concentration and alkaline phosphatase levels did not change during the treatment. The glucose load due to the high concentrations of glucose in the dialysate may have adverse effects on the glucose tolerance and insulin secretion of CAPD patients. However, in fasting patients it could be shown that only the 4.25% glucose dialysate causes any increase in plasma glucose levels with a concommitant rise of insulin secretion, an exchange with a 1.5% glucose dialysate having relatively little effect on these parameters. Quantification of the individual serum lipoproteins is also being performed during CAPD. No changes were observed in α-cholesterol levels, but 50% of the patients have shown significant increases in total serum cholesterol, β-cholesterol and serum triglycerides in the course of treatment. In these cases dietary consequences must be considered in order to minimise the potential artherosclerotic risk.
    Notes: Zusammenfassung Biochemische Untersuchungen wurden an acht chronisch-niereninsuffizienten Patienten im Verlaufe der CAPD (mittlere Behandlungszeit 11,5±4 Monate) durchgeführt. Trotz erheblicher Proteinverluste ins Dialysat blieben die Serumprotein-und -Albuminkonzentrationen konstant. Auch die Quotienten essentielle/nicht essentielle Plasmaaminosäuren sowie Valin/Glycin im Plasma blieben unverändert. Es scheint also, als ob die Aminosäuren- und Proteinverluste ins Dialysat alimentär gut kompensierbar sind. Auf die Plasmakonzentration von Calcium und Phosphat hatte die CAPD keinen sicheren Einfluß. Ebenso ließen sich Änderungen des immunreaktiven Parathormons und der alkalischen Phosphatase nicht nachweisen. Theoretisch ist angesichts der hohen Glukosekonzentration der Dialysatlösungen und einer dadurch bedingten Glukosebelastung des Patienten mit einer Beeinflussung von Glukosetoleranz und Insulinsekretion zu rechnen. Unter Nüchternbedingungen fand sich jedoch ausschließlich bei Verwendung der hochkonzentrierten (4,25%igen) Glukosedialysatlösung eine erhöhte Plasmaglukose mit verstärkter Insulinsekretion. Die 1,5%ige Glukoselösung hatte dagegen keinen wesentlichen Einfluß auf diese Parameter. Von den Serumlipoproteinen blieb im Verlaufe der CAPD α-Cholesterin unverändert, während Gesamtcholesterin signifikant und β-Cholesterin sowie die Neutralfette insignifikant zunahmen. Um ein potentielles Arterioskleroserisiko gering zu halten, müssen gezielte diätetische Maßnahmen während der CAPD ergriffen werden.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1440
    Keywords: Hypercholesterolemia ; Low-density lipoproteins ; Heparin precipitation ; Extracorporeal plasma treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The first clinical application of a new extracorporeal procedure (HELP) for the selective elimination of low-density lipoproteins by heparin precipitation at acid pH is described. Plasma, obtained by filtration of whole blood through a 0.2 µ filter, is continuously mixed with an equal volume of an acetate buffer (pH 4.85) containing heparin. After removal of the precipitated heparin complex by filtration, excess heparin is adsorbed to a specially developed filter and the clear plasma filtrate is subject to bicarbonate dialysis/ultrafiltration to restore physiologic pH and remove excess fluid. The calculated efficiency for the elimination of low-density lipoproteins from plasma by HELP is 100% and is therefore comparable to conventional plasmapheresis. The HELP system shows a high degree of specificity with over 80% of total protein being returned to the patient. Over 130 treatment procedures have now been performed. Patient compliance and acceptance have been excellent and no major complications have been observed.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1440
    Keywords: LDL apheresis ; Vitamin E ; Vitamin A ; α-Tocopherol ; Retinol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Serum α-tocopherol and retinol concentrations were followed in four heterozygous adults and one homozygous child with familial hypercholesterolemia being treated by regular low-density lipoprotein (LDL) apheresis. Approximately 50% of plasma α-tocopherol was eliminated during a single apheresis procedure in the heterozygous adults, while a complete elimination of this vitamin along with LDLs was observed in the homozygous child. Absolute losses of α-tocopherol amounted to 13.4–22.5 mg/apheresis and are equivalent to the recommended dietary intake for 1.5 to 2 days. Despite these losses, no changes were observed either in serum α-tocopherol levels or in the ratio of α-tocopherol/total serum lipids after 12 months regular apheresis treatment. Serum retinol concentrations only showed a small decrease on apheresis, there being apparently no specific elimination of this vitamin. The absolute losses ranged from 42–422 µg/apheresis and were, therefore, much lower than the recommended dietary intake of the equivalent of 1500 µg retinol/day. It is concluded that no extra supplementation of these vitamins is required during LDL-apheresis therapy, although it may be advisable to monitor vitamin E status in patients on long-term, intensive therapy.
    Type of Medium: Electronic Resource
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