ISSN:
1432-0827
Keywords:
99mTc-Sn-methylene-diphosphonate
;
Kinetic analysis
;
Bone turnover
;
Metabolic bone disease
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
,
Physics
Notes:
Summary The blood clearance and the urinary excretion of the bone scanning complex technetium-tin-methylene-diphosphonate (99mTc-Sn-MDP) administered intravenously have been measured in 27 normal subjects and 104 patients with post-menopausal osteoporosis, osteomalacia, primary hyperparathyroidism, Paget's disease, pagetoid metastases of prostatic cancer, osteolyses, chronic renal failure, and liver cirrhosis to quantitate the skeletal uptake of the radiopharmaceutical. Kinetic analysis of the data was performed in terms of a four-compartment model; correspondent rate constants and fitted values were estimated. In normal subjects the whole-body retention (WBR) up to 24 h was 33.3%±7.4 SD, whereas significantly more elevated values were observed in several pathological conditions, the highest values being ascertained in patients with pagetoid metastases, primary hyperparathyroidism, and chronic renal failure and whenever large osteoid seams were present. Differences were found between osteoporosis and osteomalacia, monostotic and polyostotic Paget's, pagetoid and osteolytic metastases of bone. In Paget's disease significant correlations have been observed between WBR and the exchangeable calcium pool, WBR and the serum alkaline phosphatase, and WBR and the urinary excretion of hydroxyproline. Kinetic analysis demonstrated that WBR provided overestimate of the skeletal retention by an average of 16%, the retention in the “extravascular space” being greater in patients with chronic renal failure. This simple method shows significant promise for a quantitative approach to the skeletal turnover in metabolic bone disease.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02408600
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