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Fig. 2 | Critical Care

Fig. 2

From: Pulse oximetry

Fig. 2

Common pulsatile signals on a pulse oximeter. (Top panel) Normal signal showing the sharp waveform with a clear dicrotic notch. (Second panel) Pulsatile signal during low perfusion showing a typical sine wave. (Third panel) Pulsatile signal with superimposed noise artifact giving a jagged appearance. (Bottom panel) Pulsatile signal during motion artifact showing an erratic waveform. Reprinted with permission from BioMed Central Ltd [1]

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