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  • 1995-1999  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Normal Data for Lumbar Spine Bone Mineral Content in Healthy Chinese Men (1997)
    Springer
    Calcified tissue international 61 (1997), S. 114 -116 
    Details
    ISSN: 1432-0827
    Schlagwort(e): Key words: Age — Bone mineral density — Chinese men.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin , Physik
    Notizen: Abstract. The aim of this study was to evaluate the influence of age on bone mineral density (BMD) of the lumbar spine for healthy Chinese men. In 430 healthy Chinese men (ages 20–92 years) living on Taiwan, BMD at the level of the 2nd to 4th lumbar vertebraes (L2–L4) was determined with a commercial dual-energy X-ray absorptiometer (DXA). Our study found that the peak BMD value of lumbar spines of healthy Chinese men was 1.056 ± 0.127 g/cm2 which occurs from age 20 to 29. The results show that a linear correlation between the age and BMD of lumbar vertebraes for healthy Chinese is notable. Only slight decreases of BMD values in the different age groups are found. In comparison with the normal data of white men and Asian men from Japan and Korea, the mean BMD values of lumbar spines of Chinese men seem to be lower than those of the white, Japanese, and Korean men of the same ages. Our findings indicate that the influence of age and ethnicity may exist in the BMD values for healthy Chinese males.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002239900306
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Comparison of Theory and Experiment in Pulsatile Flow in Cat Lung (1998)
    Springer
    Annals of biomedical engineering 26 (1998), S. 812-820 
    Details
    ISSN: 1573-9686
    Schlagwort(e): Pulmonary circulation ; Pulsatile flow ; Input impedance ; Characteristic impedance ; Lung: cat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin , Technik allgemein
    Notizen: Abstract A mathematical model of pulsatile flow in cat lung based on existing morphometric and elastic data is presented and validated by experimental results. In the model, the pulmonary arteries and veins were treated as elastic tubes, whereas the pulmonary capillaries were treated as two-dimensional sheets. The macro- and microcirculatory vasculature was transformed into an analog electrical circuit. Input impedances of the pulmonary blood vessels of every order were calculated under normal physiological conditions. Pressure-flow relation of the whole lung was predicted theoretically. Experiments on isolated perfused cat lungs were carried out. The relation between pulsatile blood pressure and blood flow was measured. Comparison of the theoretically predicted input impedance spectra with those of the experimental results showed that the modulus spectra were well predicted, but significant differences existed in the phase angle spectra between the theoretical predictions and the experimental results. This latter discrepancy cannot be explained at present and needs to be further investigated. © 1998 Biomedical Engineering Society. PAC98: 8745Hw, 8710+e
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1114/1.107
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