caa a22 4500 465825915 CHVBK 20180323112149.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF02842491 doi (NATIONALLICENCE)springer-10.1007/BF02842491 Pressure measurement artifact with analog-to-digital conversion [Elektronische Daten] [Lawrence Siegel, Ronald Pearl] Pressure was transduced with the use of a fluidfilled catheter and standard medical monitoring equipment. When the signal was sampled at 200 Hz with an analog-todigital converter, an artifact was observed. The 3.5-Hz artifact had an amplitude of 0.3 to 0.9 mm Hg and was caused by aliasing of a noise contaminant from the 2,403.5-Hz electrical excitation signal of the transducer. The artifact was completely eliminated with a 100-Hz low-pass filter. Electrical filtering is necessary for accurate acquisition of pressure measurements with analog-to-digital conversion, even when the sampling rate satisfies the Nyquist criterion for the frequency response of the mechanical system. Although the impact of the artifact is small in the clinical area, it is important under some research circumstances. Little, Brown and Company, 1990 Measurement techniques: analog/digital conversion nationallicence Equipment: transducer nationallicence Siegel Lawrence Department of Anesthesia, Stanford University School of Medicine, S278, CA 94305, Stanford aut Pearl Ronald Department of Anesthesia, Stanford University School of Medicine, S278, CA 94305, Stanford aut Journal of Clinical Monitoring Springer Netherlands 6/4(1990-10-01), 318-321 0748-1977 6:4<318 1990 6 10877 https://doi.org/10.1007/BF02842491 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02842491 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Siegel Lawrence Department of Anesthesia, Stanford University School of Medicine, S278, CA 94305, Stanford aut NATIONALLICENCE 700 1- Pearl Ronald Department of Anesthesia, Stanford University School of Medicine, S278, CA 94305, Stanford aut NATIONALLICENCE 773 0- Journal of Clinical Monitoring Springer Netherlands 6/4(1990-10-01), 318-321 0748-1977 6:4<318 1990 6 10877 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer