ZOLL Propaq M Rev B - Manual (Page 84)

C HAPTER 8 M ONITORING N ON -I NVASIVE B LOOD P RESSURE (NIBP)
8-2 www.zoll.com 9650-0803-01 Rev. B
• Do not attempt to take NIBP measurements on patients during cardiopulmonary
bypass procedures.
• Some or all NIBP safety functions are disabled when performing the NIBP test in the
Service menu. Do not conduct NIBP tests when the cuff is attached to a patient.
How does NIBP Work?
The blood pressure cuff and hose connect to the Propaq M unit through the NIBP connector on
the side panel of the unit. The NIBP button on the front panel of the unit allows you to initiate
and terminate blood pressure measurements, which are displayed in the NIBP area of the
monitor.
The Propaq M unit’s NIBP module measures the oscillometric pulses transmitted through the
blood pressure cuff and hose, and calculates the blood pressure measurements accordingly. The
pressure measurement proceeds as follows:
1. The cuff inflates to a preconfigured pressure (determined by patient type) above the
patient’s systolic blood pressure. As the cuff inflates, the Propaq M unit measures the
oscillometric pulses transmitted from the cuff through the hose, and the SureBP monitoring
software calculates the patient’s systolic, diastolic, and mean blood pressure. Once these
measurements are taken, the cuff deflates. The Propaq M unit takes these measurements in
about 15 seconds.
The SureBP feature requires the use of a cuff and dual lumen hose.
2. If high artifact prevents an accurate measurement during cuff inflation, or if you use a cuff
and single lumen hose, the cuff inflates to its target pressure to occlude blood flow through
the arteries in the monitored limb. The cuff deflates incrementally, allowing blood to flow
through the cuff and into the monitored limb. As blood flows through the partially deflated
cuff, it produces pressure oscillations that are transmitted to the Propaq M unit through the
hose.The Propaq M unit measures the oscillometric pulses and uses them to calculate the
corresponding systolic, diastolic, and mean blood pressure. This measurement takes about 30
seconds.
3. The NIBP option automatically adjusts the blood pressure measurement procedure in
response to certain error conditions such as:
Condition Adjustment/Response
The unit cannot detect systolic
pressure The unit automatically increases the cuff inflation
pressure and completes the blood pressure mea-
surement
The unit cannot detect systolic,
diastolic or mean pressure after
180 seconds The unit aborts the blood pressure measurement and
deflates the cuff
The unit detects a fault The unit displays a corresponding error message on
the monitor and aborts the measurement