Key result
The Hitachi HME-20 monitor significantly correlated with intra-arterial BP and ECG heart rate (p<0.001), though it underestimated systolic BP by a mean of 12 mmHg.
Why the study?
Does the Hitachi HME-20 pulse and blood-pressure monitor provide accurate measurements compared to direct intra-arterial and electrocardiographic monitoring?
Observational
Does the Hitachi HME-20 pulse and blood-pressure monitor provide accurate measurements compared to direct intra-arterial and electrocardiographic monitoring?
Answers are grounded in this paper and cite their sources.
The Hitachi HME-20 monitor provides satisfactory estimates of heart rate and blood pressure, making it useful for tracking relative changes despite underestimating absolute systolic pressure.
The performance of the Hitachi HME-20 pulse and blood-pressure (BP) monitor in comparison with direct intra-arterial BP recording and electrocardiographic monitoring is described. Highly significant (p less than 0.001) correlations were found between intra-arterial systolic and diastolic pressures and pressures recorded by the Hitachi monitor. Similarly, the electrocardiographically computed heart-rate, and that given by the Hitachi monitor were significantly correlated (p less than 0.001). Systolic blood-pressure was underestimated by a mean of -12 mmHg and tended to become more erroneous when intra-arterial pressure was greater than 150 mmHg. These results are comparable to more expensive pulse and blood-pressure monitors. We conclude that the instrument can reproduce a satisfactory estimate of heart-rate and blood-pressure and may be of particular use when a change of blood-pressure is of prime importance, rather than an absolute measurement.
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Northcote et al. (1985) reported an observational. Hitachi HME-20 pulse and blood-pressure monitor vs. Direct intra-arterial BP recording and electrocardiographic monitoring was evaluated on Correlation of blood pressure and heart rate measurements (mean difference -12 mmHg (systolic BP), p=<0.001). The Hitachi HME-20 monitor significantly correlated with intra-arterial BP and ECG heart rate (p<0.001), though it underestimated systolic BP by a mean of 12 mmHg.
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