caa a22 4500 465783635 CHVBK 20180323112002.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF02446155 doi (NATIONALLICENCE)springer-10.1007/BF02446155 Mechanical impedance of the canine diaphragm [Elektronische Daten] Part 1 Experimental system and measurements [B. Suki, B. Daróczy, Z. Hantos] A technique which does not require the measurement of strain has been developed for the investigation of the incremental dynamic properties of soft tissue sheets. Radially prestressed and circularly clamped canine diaphragm samples were exposed to small-amplitude pseudorandom pressure variations. From the measurement of these pressure variations and the volume flow caused by the vibration of the membrane the incremental mechanical impedance spectrum was computed in the 0·25-5 Hz frequency range at three different levels of initial stress. The diaphragm tissue was found to be basically elastic. However, the small viscous component showed a sharp negative frequency dependence between 0·25 and 2 Hz. The quasistatic elastances of the samples were in good, agreement with the elastance values derived from the impedance data. The relationship between the elastance and the initial stress was close to linear. It was concluded that the method is applicable to the study of the incremental dynamic properties of planar soft tissue samples. IFMBE, 1990 Excised diaphragm nationallicence Forced oscillation nationallicence Initial stress nationallicence Membrane elastance nationallicence Tissue impedance nationallicence Suki B. Biomechanics Group, Kalmár Laboratory of Cybernetics, József Attila Uníversity, PO Box 652, H-6701, Szeged, Hungary aut Daróczy B. Biomechanics Group, Kalmár Laboratory of Cybernetics, József Attila Uníversity, PO Box 652, H-6701, Szeged, Hungary aut Hantos Z. Biomechanics Group, Kalmár Laboratory of Cybernetics, József Attila Uníversity, PO Box 652, H-6701, Szeged, Hungary aut Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/4(1990-07-01), 361-366 0140-0118 28:4<361 1990 28 11517 https://doi.org/10.1007/BF02446155 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02446155 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Suki B. Biomechanics Group, Kalmár Laboratory of Cybernetics, József Attila Uníversity, PO Box 652, H-6701, Szeged, Hungary aut NATIONALLICENCE 700 1- Daróczy B. Biomechanics Group, Kalmár Laboratory of Cybernetics, József Attila Uníversity, PO Box 652, H-6701, Szeged, Hungary aut NATIONALLICENCE 700 1- Hantos Z. Biomechanics Group, Kalmár Laboratory of Cybernetics, József Attila Uníversity, PO Box 652, H-6701, Szeged, Hungary aut NATIONALLICENCE 773 0- Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/4(1990-07-01), 361-366 0140-0118 28:4<361 1990 28 11517 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer