| Autor: |
Scharfetter, Hermann, Merwa, Robert, Chin, A., Ruehr, S.A., Tarulli, A.W., Rutkove, S.B. |
| Zdroj: |
13th International Conference on Electrical Bioimpedance & the 8th Conference on Electrical Impedance Tomography; 2007, p272-275, 4p |
| Abstrakt: |
Rotational electrical impedance myography (EIM) is an impedance method for assessing the anisotropic character of muscle. Work to date suggests that muscle anisotropy changes in neuromuscular disease states, and rotational EIM may be a useful approach to evaluating such alterations. We are currently in the process of developing an impedance measuring system for this purpose and require a durable testing medium that provides consistent anisotropy and that would be easy to use in a non-medical facility where human subjects are not available for testing. Wood is well known to have anisotropic characteristics, and thus, we have chosen saline saturated balsa wood for study. A 12.7 X 12.7 X 0.6 cm piece of solid balsa wood was soaked in saline for 18 days, during and after which multifrequency impedance measurements were made at 0° and 90° relative to the grain direction. The wood demonstrated dramatic reductions in resistance and reactance for both orientations over the period, with values stabilizing after about 1 week. In particular, anisotropy persisted even with prolonged soaking, reactance and resistance values being lower for currents parallel to the grain than orthogonal to it. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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