Key result
Pulse oximeter waveform recordings during a Valsalva manoeuvre can rapidly identify pre-operative patients with autonomic neuropathy and impaired cardiovascular stress responses.
Why the study?
Can a pulse oximeter be used during a Valsalva manoeuvre to identify autonomic dysfunction?
Can a pulse oximeter be used during a Valsalva manoeuvre to identify autonomic dysfunction?
Pulse oximetry during a Valsalva maneuver may offer a rapid, non-invasive method for pre-operative screening of autonomic dysfunction.
Answers are grounded in this paper and cite their sources.
May aid pre-op autonomic screening in select cases; leaves open validation in prospective cohorts before wider use.
Chart recordings of the pulse oximeter waveform were taken during the performance of a standard Valsalva manoeuvre, in one subject with and another without autonomic dysfunction. They demonstrate that certain types of pulse oximeter may be used for the rapid pre-operative identification of patients who have an autonomic neuropathy in which the cardiovascular responses to stress are impaired.
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Broome et al. (1988) studied this question. Pulse oximeter waveform recordings during a Valsalva manoeuvre can rapidly identify pre-operative patients with autonomic neuropathy and impaired cardiovascular stress responses.
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