Dynamic Properties of Finger Arteries
| Autoři | |
|---|---|
| Rok publikování | 2011 |
| Druh | Konferenční abstrakty |
| Fakulta / Pracoviště MU | |
| Citace | |
| Popis | Several methods of studying the properties of the arterial wall of big arteries have been used in clinical practice. Methods for the study of small arteries are almost unavailable except work of J. Penaz. The aim of the present study was to follow dynamic properties of finger arteries by means of a frequency analysis of the responses of the volume of finger arteries elicited by externally applied pressure. The cuff with a source of infrared (IR) light is placed on the middle phalanx of the third finger. A sensor on the other side of the finger measures the IR signal, which is proportional to the volume of the corresponding segment of finger arteries. External stationary pressure is applied in discrete steps from 20 to 200 mm Hg together with an alternate pressure (40-120 Hz). The obtained curves of the relation between the amplitude of the volume changes and the external pressure frequency correspond to the assumed properties of finger arteries. The signal-to-noise ratio is too low. Improvement of the signal-to-noise ratio by technical means is necessary for the application of the method in clinical practice. |
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