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  • 125J-fibrinogen uptake test  (1)
  • Ascorbic acid  (1)
  • Cimetidine  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 65 (1987), S. 97-100 
    ISSN: 1432-1440
    Keywords: Myocardial calcinosis ; Hemodialysis ; Hyperoxalemia ; Ascorbic acid ; Calcium oxalate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Secondary oxalosis in chronic hemodialyzed patients is caused by impaired renal excretion and inadequate removal of oxalic acid during hemodialysis. Ascorbic acid is a precursor of oxalic acid. We report a parathyroidectomized patient with chronic renal failure, on hemodialysis, who received over a period of several months a total dose of 91.0 g ascorbic acid i.v. The plasma oxalic acid level in this patient was 14-fold higher than in healthy persons. Increased oxalic acid synthesis from its precursor ascorbic acid may be responsible for hyperoxalemia, high content of oxalic acid in myocardium, aorta and lung, and calcium oxalate deposition in soft tissues. Application of high doses of ascorbic acid should be avoided in hemodialysed patients with chronic renal failure.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: 125J-fibrinogen uptake test ; Venous thrombosis ; Anticoagulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The sensitivity of the radiofibrinogen test was investigated to determine the accuracy of the test in diagnosis of venographically proven venous thrombosis in 70 heparinized patients.125J-fibrinogen was administered between 2 h and 4 days (mean: 1.5 days) after initiating heparin therapy. There were two criteria for a positive test: (a) if the difference between the counts for adjacent points on the same leg or equivalent sites on opposite legs was at least 15%; and/or (b) if there were three adjacent points each with counts 〉5% that of the same three points on the other leg. The fibrinogen uptake test was positive at the first examination in 67 of 70 patients, giving a sensitivity of 96%. The respective frequencies of truly abnormal results for the 3×5% and the 1×15% criteria were 94% and 71%. As far as localization and extension of thrombosis were concerned, the fibrinogen uptake test agreed with phlebography in 73% of the cases, when the counts in the groin and the upper third of the thigh were ignored. The125J-fibrinogen uptake test is an accurate method for detecting established deep leg vein thrombosis even in anticoagulated patients.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1440
    Keywords: Cimetidine ; Pirenzepine ; Parathyroid hormone ; Calcitonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In this study we evaluated the effects of an oral combination therapy with cimetidine and pirenzepine on plasma parathyroidhormone (PTH) and calcitonin (CT) levels in 24 patients on maintenance hemodialysis (mean age: 50 years; mean duration of dialysis treatment: 23 months). As compared to the pre-treatment plasma levels of PTH and CT, there were no significant changes of their plasma concentrations during a 4-week administration of 800 mg cimetidine or 100 mg pirenzepine daily, and the concentrations also did not change significantly during the following 4 weeks of combination therapy with cimetidine and pirenzepine in the above mentioned dosage. Serum concentrations of calcium and phosphate and the activity of the alkaline phosphatase showed no significant changes either. Therefore, we suggest that this therapeutic approach cannot be considered for the treatment of uremic hyperparathyroidism.
    Type of Medium: Electronic Resource
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