Navegando por Palavras-chave "Bone ultrasonometry"

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    Correlação entre ultrassonometria quantitativa de calcâneo e densitometria óssea duo-energética de coluna e fêmur na avaliação óssea
    (Sociedade Brasileira de Endocrinologia e Metabologia, 1999-06-01) Lazaretti-Castro, Marise [UNIFESP]; Brandão, Cynthia [UNIFESP]; Yassuda, Mirna Yae [UNIFESP]; Martin, Luciana N.c. [UNIFESP]; Vieira, José Gilberto H. [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    The dual-energy X-ray absorptiometry (DEXA) is the most commonly used technique for bone mass density (DMO), although the quantitative calcaneus bone ultrasonometry (USQ) shows good results as a predictor for fracture risk. We compared the results obtained by these two methods in patients referred to the Endocrine Division at the Universidade Federal de São Paulo (UNIFESP) for DEXA evaluation. A total of 189 patients were studied, 165 women / 24 men, with ages from 20 to 84 years (Mi: 51 and 53, respectively for women and men) with distinct diagnosis. All were submitted on the same day to DEXA (Lunar,DPX-L) for lumbar spine (LOMB), neck (COLO) and major throcanter (TROC) and to USQ of calcaneus (Lunar, Aquilles), measuring speed of sound (SOS) and broadband ultrasound attenuation (BUA). A significant positive correlation was found between DEXA values in all sites and USQ. The best correlation was seen in men, between TROC and SOS (r=0.82). When only individuals 50 years or older (n=102) were evaluated, the coefficient of correlation was lower than in the younger than 50, but still significant. In evaluating the utility of USQ as a screening for DEXA measurement, we found that 21.4% of patients with normal values for T score on USQ were osteopenic or osteporotic on TROC. This discrepancy was even more evident on LOMB, where 29.9% of the patients with normal DMO presented T<-1 on USQ, and 35.8% of the patients with normal USQ had T<-1 on DMO of the same region. The coefficient of variation of USQ obtained after 9 measurements in the same person on different days was 0.66% for SOS and 2.75% for BUA. In conclusion, the USQ is only moderately related to DMO and has little utility as a screening for DEXA examination. Its value to determine fracture risk is already established, however prospective studies are necessary to evaluate its usefulness in the diagnosis and follow-up of osteoporosis.