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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Osteoporosis international 3 (1993), S. 23-28 
    ISSN: 1433-2965
    Keywords: Clodronate ; Osteoporosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Bisphosphonates are widely used in disorders associated with increased resorption of bone, particularly in Paget's disease of bone and in the hypercalcemia of malignancy. Because of their undoubted efficacy and relatively low toxicity, bisphosphonates are attractive candidates for the management of osteoporosis. Clodronate, one of the many bisphosphonates being tested in osteoporosis, may be given intravenously or by mouth. In contrast to etidronate, even high doses of clodronate do not impair the mineralization of bone, making it suitable for long-term use in osteoporosis. As do all the bisphosphonates tested thus far, clodronate appears to delay the rate of bone loss in osteoporosis. Long-term studies are relatively few, so that its steady-state effects on bone mass are not yet known. Most data suggest clodronate is capable at least of delaying the rate of bone loss, but several pilot studies with this agent suggest that increments of bone mass might be sustainable for several years. Clodronate is likely to decrease the frequency of osteoporotic fractures, but there is no evidence for this at present. Well-controlled, long-term prospective studies are needed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0827
    Keywords: Glucocorticoid ; Histomorphometry ; Bone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract The aims of this study were to determine (1) whether acute suppression of bone formation could be evaluated after the administration of corticosteroids in man by quantitative bone histomorphometry; and (2) whether there were significant differences between the effects of prednisone and its analog deflazacort. Thirteen patients who needed high-dose corticosteroid therapy were randomly allocated to two groups of treatment (prednisone or deflazacort). Quantitative bone histomorphometry, using the technique of triple labeling, and biochemical measurements of bone turnover were studied. There were no differences in biochemical indices of bone turnover between prednisone and deflazacort at the beginning and end of the 15 days of treatment course. During corticosteroid treatment, there were no significant changes in biochemical indices of bone turnover but a significant decline in total alkaline phosphatase (P〈0.01). Histomorphometric indices, as revealed by measurements of tetracycline interval and extent of labeling, showed no significant differences in either mineral apposition rate or bone formation rate in the two groups. We conclude that the acute glucocorticoid suppression of bone turnover by glucocorticoids is not detectable within the first 2 weeks of treatment by histomorphometric techniques. No differences in bone effects of prednisone and deflazacort were detected in this short-term study.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Osteoporosis international 11 (2000), S. 368-371 
    ISSN: 1433-2965
    Keywords: Key words:Bone mineral density – Dual energy X-ray absorptiometry – Osteoporosis diagnosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract: The diagnosis of osteoporosis is based on bone mass measurement. To avoid the errors associated with the measurement of spinal bone density the total hip has been accepted as the standard measurement site. This information is not available for many early measurements. We have assessed whether it is possible to derive clinically useful information about total hip bone mineral density (BMD) from measurements at other hip sites. The bone mass measurements of 46 patients participating in a current trial of therapy for osteoporosis were reviewed. The total hip BMD as directly measured was compared with that obtained from the formula: Total hip BMD = 0.48×Neck BMD + 0.62×Trochanteric BMD + 0.03. In 30 patients with follow-up data the rate of change in hip BMD over a year was also determined by both methods. In the pretreatment state there was good agreement between the two measures (r 2 = 0.96, SEE 0.012 g/cm2). If the formula was used to compute a change in total hip BMD, the agreement between both methods remained good. However, the standard error of the estimate of the change represented 59% of the observed change. This indicates that the error associated with this estimate is too great to allow clinically meaningful conclusions to be drawn from calculated total hip BMD. We conclude that, whilst it may be possible to obtain reasonable point estimates of total hip BMD from other measures in the hip, these estimates are too imprecise to allow conclusions about change in BMD to be made.
    Type of Medium: Electronic Resource
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