Key result
Plethysmographic pulse oximeter waveform monitoring revealed that an increase in trace amplitude preceded an episode of vasovagal syncope during central neuraxial blockade.
Why the study?
Does plethysmographic pulse oximeter waveform monitoring predict impending vasovagal syncope during central neuraxial blockade?
Does plethysmographic pulse oximeter waveform monitoring predict impending vasovagal syncope during central neuraxial blockade?
Plethysmographic pulse oximeter waveform variation monitoring may help predict impending vasovagal syncope during central neuraxial blockade.
Answers are grounded in this paper and cite their sources.
Should not yet change monitoring practice; single case report leaves open predictive utility of waveform amplitude.
Summary Vasovagal syncope during central neuraxial blockade is a recognised phenomenon. We report a case of syncope, which was preceded by an increase in the amplitude of the plethysmograph trace. We review the physiological changes leading to such an episode and the role of plethysmographic pulse oximeter waveform variation monitoring in the prediction of syncope.
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Dubey et al. (2015) studied this question. Plethysmographic pulse oximeter waveform monitoring revealed that an increase in trace amplitude preceded an episode of vasovagal syncope during central neuraxial blockade.
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