Reference Guide - Propaq Encore Vital Signs Monitor - Welch Allyn

42 Patient monitoring Welch Allyn Propaq Encore Vital Signs Monitor
NIBP
Intended use
The Propaq Encore noninvasive blood pressure channel (NIBP) indirectly measures arterial
pressures using an inflatable cuff. If ECG is also monitored, the Propaq Encore
synchronizes the NIBP measurement process to the occurrences of the R-wave,
increasing accuracy in cases of extreme artifact, diminished pulses, or some
dysrhythmias.
WARNING The patient's limb should be periodically observed to ensure that the
circulation is not impaired for a prolonged period of time.
WARNING The Propaq Encore should never be used to monitor NIBP on one
patient while simultaneously monitoring ECG on another patient.
WARNING If a noninvasive blood pressure measurement is suspect, repeat the
measurement. If you are still uncertain about the reading, use another method.
WARNING Do not attempt to take NIBP pressures on patients during
cardiopulmonary bypass.
WARNING Some or all NIBP safety functions are disabled in the NIBP TEST
screen in the Service Menu. Do not attempt to conduct NIBP TEST when the cuff
is attached to a patient.
The Propaq Encore NIBP channel has been calibrated to agree with a central invasive
blood pressure. Diastolic pressures may be 5 to 10 mmHg lower than the auscultatory
equivalent. Systolic pressures may be lower than radial invasive equivalent.
Neonatal Mode is intended for use on infants of up to about 44 weeks gestational age in
neonatal care settings. The Neonatal Mode provides the lowest cuff pressure and
shortest inflation time limits to ensure patient safety and comfort.
Pediatric Mode is intended to be used on larger infants and small children up to nine
years old in pediatric care settings. This mode supports the widest range of cuff sizes and
a higher range of patient numerics for the hypertensive infant or child while still restricting
the cuff pressure and inflation times to limits lower than those allowed for adults.
Adult Mode provides the full range of patient numerics and cuff pressures but limits the
cuff sizes available to the standard child cuff and larger.
NIBP measurements are affected by normal physiological pressure variations from
reading to reading. Normal respiration may affect pressure by as much as 10 to 20 mmHg.
Patient’s emotional state, body position, and cuff fit may also adversely affect NIBP
measurements. In some individuals, the act of taking blood pressure readings may alter
the blood pressure. Successive readings on the same patient may vary for the above
reasons.
The static accuracy of the Propaq’s internal manometer can be verified by a qualified
biomedical engineer using a mercury column manometer (refer to the Propaq Encore
Service Manual). The accuracy of the Propaq’s determination of systolic, diastolic, and
mean pressures in a clinical setting can only be assessed by careful statistical analysis of
controlled clinical trials of representative patient populations.