Key result
Non-invasive mean arterial pressure measured by a differential oscillometric device at the finger was on average 2.7 ± 4.9 mmHg lower than invasive radial artery monitoring.
Why the study?
Does non-invasive beat-to-beat MAP monitoring in finger arteries using a differential oscillometric device accurately measure MAP compared to invasive radial artery monitoring in patients after cardiac surgery?
Observational (n=22)
Does non-invasive beat-to-beat MAP monitoring in finger arteries using a differential oscillometric device accurately measure MAP compared to invasive radial artery monitoring in patients after cardiac surgery?
Non-invasive differential oscillometric finger MAP monitoring shows a small mean discrepancy compared to invasive radial MAP in post-cardiac surgery patients, but marked individual variability suggests caution in its clinical application.
Answers are grounded in this paper and cite their sources.
Marked variability cautions against clinical substitution for invasive monitoring; leaves open prospective validation in post-cardiac surgery patients.
Non-invasive beat-to-beat mean arterial pressure (MAP) in finger arteries recorded by the differential oscillometric device was compared with MAP recorded invasively from A. radialis in 22 patients after cardiac surgery. Based on all 132 paired measurements, the MAP values measured at the radial artery were 2.7 ± 4.9 mmHg higher than those measured on fingers. Among 22 patients there were 8 patients receiving inotropic support, their difference being 2.1 ± 5.6 mmHg. The present study revealed that the mean discrepancy between the invasive radial pressure and finger pressure was small; however, patient data sets showed marked variability in average pressure differences when examined individually.
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Jagomägi et al. (2010) conducted an observational in Intensive care patients after cardiac surgery (n=22). Differential oscillometric device (non-invasive finger MAP) vs. Invasive MAP monitoring from A. radialis was evaluated on Mean arterial pressure (MAP) difference (MD 2.7 ± 4.9 mmHg). Non-invasive mean arterial pressure measured by a differential oscillometric device at the finger was on average 2.7 ± 4.9 mmHg lower than invasive radial artery monitoring.
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