caa a22 4500 465783945 CHVBK 20180323112003.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF02441768 doi (NATIONALLICENCE)springer-10.1007/BF02441768 Analysis of the pressure perturbation due to the introduction of a measuring probe under an elastic garment [Elektronische Daten] [L. Vinckx, W. Boeckx, J. Berghmans] Attention is drawn to the increase of the pressure on the skin due to the introduction of a measuring probe under an elastic garment. The increase of pressure is explained by looking at the force equilibrium on the transducer. Making some assumptions on the geometry and the conditions that actually prevail at the interface, this mechanical phenomenon is expressed mathematically. Expressions for estimating the order of magnitude of the relative pressure perturbation are derived both for the case of a cylindrical probe and for a thin plate probe with the same curvature as the limb. Thanks to the geometrical assumptions, these expressions are independent of the mechanical properties of the probe and the soft tissue. As in some of these formulas the magnitude of the indentation appears, a measurement is necessary for estimating the error. Other expressions, only taking in account the dimensions of the limb and the probe, give a rougher estimation of the error. It is shown through a few practical examples that the error cannot be disregarded and cannot be calculated precisely, which means that this measuring technique is unreliable. The same mathematical expressions are used to show that pressure paddings effectively increase the pressure. It is also shown that the introduction of an optical fibre under the garment, used in laser Doppler flowmetry, creates an important additional pressure on the skin. IFMBE, 1990 Burn scars nationallicence Laser Doppler nationallicence Pressure calculation nationallicence Pressure garment nationallicence Pressure measurement nationallicence Pressure therapy nationallicence Vinckx L. University Hospital Sint Pieter, Burns Unit, Catholic University of Leuven, Naamsestraat 22, 3000, Leuven, Belgium aut Boeckx W. University Hospital Sint Pieter, Burns Unit, Catholic University of Leuven, Naamsestraat 22, 3000, Leuven, Belgium aut Berghmans J. Department of Mechanical Engineering, Afdeling Toegepaste Mechanica & Energie conversie, Celestijnenlaan 300A, B-3030, Leuven, Belgium aut Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/2(1990-03-01), 133-138 0140-0118 28:2<133 1990 28 11517 https://doi.org/10.1007/BF02441768 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02441768 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vinckx L. University Hospital Sint Pieter, Burns Unit, Catholic University of Leuven, Naamsestraat 22, 3000, Leuven, Belgium aut NATIONALLICENCE 700 1- Boeckx W. University Hospital Sint Pieter, Burns Unit, Catholic University of Leuven, Naamsestraat 22, 3000, Leuven, Belgium aut NATIONALLICENCE 700 1- Berghmans J. Department of Mechanical Engineering, Afdeling Toegepaste Mechanica & Energie conversie, Celestijnenlaan 300A, B-3030, Leuven, Belgium aut NATIONALLICENCE 773 0- Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/2(1990-03-01), 133-138 0140-0118 28:2<133 1990 28 11517 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer