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ISSN 1405-8790 (Print)

2003, Number 2

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Rev Mex Med Fis Rehab 2003; 15 (2)

Precision in bone densitometry studies in lumbar spine of rats

Diez GMP, Franco BE, Valdez MR, Quintana AA, Ruiz RL, Chávez ADD

Language: Spanish
References: 7
Page: 34-36
PDF size: 35.77 Kb.


ABSTRACT

The capacity of a system to have consistents results is precision, similars in repetitive evaluations (monitoring evolutions of treatment in patients) SOLAD 2002. The changes in variation that bone densitometry studies, can affect the criteria of treatment. In experimental rats assays slight changes that are not control can result in a false negative or positive in patients control. Objective: To evaluate quality control recommended to maintain quality constant. Methods: With a Hologic QDR 2000 densitometer we study the coefficient of variation of Phantom of 0.30% ant the complete body program in rats, with lumbar spine analysis of -2%. Glûer (1995) recommended 3 measures for each region in one month, in 14 experimental patients or animals, changing it’s position for each measure, in this case lumbar spine densitometry of the rats. Statistics: Mean, standard deviation, variation coefficient and confidence interval. Results: We obtained a variation coefficient of 0.37 to 1.8 (0.1617, 0.1628, 0.1613 g/cm2) in 14 rats with 3 bone densitometric spine measures of rats. Conclusion: Quality control of bone densitometry is based in a regular collection data acquisition program of image, tests that evaluate precision. In our service we have bone densitometry of spine with exactitude and precision. Certified by SOLAD.


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