Wolfram

Use this form to calculate expected performance of a blood pressure measuring device.

For enquiries, contact andrew.lowe@aut.ac.nz

Number of measurements in experiment

xbar

Mean of BPs from experiment (mmHg)

Standard deviation of BPs from experiment (mmHg)

ybar

Mean of BP errors from experiment (mmHg)

Standard deviation of BP errors from experiment (mmHg)

β1

Slope of regression line of BP errors from experiment (mmHg/mmHg)

NormalDistribution[130, 20] NormalDistribution[80, 13]

Distribution of BPs in target population (mmHg)

For compliance to BP ranges required by ISO 810602:2019+A2:2024, suitable values are Systolic: 130±20, Diastolic: 80±13

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Cpmin

Required confidence that actual proportion of measurements with tolerable error is at least the minimum tolerable proportion

ptest

Minimum tolerable proportion of measurements with tolerable error for device acceptance

Maximum tolerable error for a measurement (mmHg)