Passport® - Mindray
Passport® - Mindray
Passport® - Mindray
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NIBP Measurements NIBP Monitoring<br />
7.4.7 Cuff Inflation Timeout<br />
If the cuff pressure does not attain 15mmHg within 20 seconds for adult and pediatric, or<br />
15mmHg within 10 seconds for neonate, then the cuff is vented and the message NIBP:<br />
Retry or NIBP: Unable to Measure message is displayed in the lower left corner of the<br />
screen.<br />
The cuff will inflate to 15mmHg within 20 seconds for adult and pediatric, and 15mmHg<br />
within 10 seconds for neonate.<br />
7.4.8 Start and Stop Keys<br />
The Start and Stop keys on the front panel have the following effects on the timed<br />
measurement sequence (Interval or Timer Mode).<br />
Interval Mode is set and you press the Start key:<br />
An unscheduled measurement is made. Taking this unscheduled measurement does not<br />
affect the timing of the interval cycle, therefore, the scheduled measurements will be<br />
taken as if there were no interruptions. Only one measurement is taken for each<br />
measurement cycle - therefore, if the unscheduled measurement coincides with the<br />
scheduled measurement, it counts as the scheduled measurement. If the interval is<br />
changed without pressing the Stop key, interval measurements will continue at the<br />
newly chosen interval.<br />
Interval Mode is set and you press the Stop key during the measurement:<br />
The cuff deflates and interval measurements are suspended.<br />
Interval Mode is set and you change the interval:<br />
The measurement cycle is reset with the new interval. A measurement will be taken<br />
after you press the Start key.<br />
7.4.9 NIBP Auto Time Out Functions<br />
The NIBP data will time out on the display under the following conditions:<br />
When the elapsed time exceeds the pre-set time out in the installation mode<br />
If a measurement is unsuccessful, the display values are replaced with “XXX” and a<br />
tone sounds.<br />
7.4.10 Indirect BP Measurements and Associated Errors<br />
Place the patient in a supine position to obtain true physiological pressure. If the cuff is not at<br />
the patient’s heart level, the pressure values obtained will not reflect the true physiological<br />
pressure. Instead, the readings will be decreased by 1.86 mmHg for every inch the cuff is<br />
placed above the heart level and increased by 1.86 mmHg for every inch the cuff is placed<br />
below the heart level. This effect is due to hydrostatic pressure.<br />
Blood weight influences blood pressure readings. The value of the weight of blood depends<br />
on where the measurement is taken with respect to the heart. When the patient is supine, on<br />
a flat surface, the arm is near enough to the heart level that no adjustment of the NIBP<br />
readings is necessary.<br />
7 - 10 0070-10-0704-02 Passport V Operating Instructions