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Fig. 1 | JA Clinical Reports

Fig. 1

From: Optical surgical navigation system causes pulse oximeter malfunction

Fig. 1

Changes in the waveform displayed on the monitor. ECG electrocardiograph, SpO 2 oxyhemoglobin saturation measured by pulse oximetry, aBP arterial blood pressure. a Noise of about 10 Hz on the waveforms. b Noise of about 6 Hz on the waveforms. c Flattening of the plethysmogram. d Almost normal waveforms. The value of a pulse oximeter changed every beat on its display in a and b. In the case of c, the value of the pulse oximeter could not be displayed

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