Application, Safety Information
7
PHYSIO-PORT UP
A9951 Revision C
innovative technique, the cuff is inflated to a pressure
just above the expected systolic value. Once the
systolic value is determined, the cuff can immediately
and quickly be deflated. The measurement typically
takes only approx. 20 seconds. (see Fig. 1-2)
If disturbances occur during measurements with the
inflation measurement method, which may be due to
motion artifacts, for example, PHYSIO-PORT UP will
automatically switch to the deflation measurement
method and complete the blood pressure measurement.
Fig. 1-2 Waveform representing the pressure in the
cuff during a measurement using the inflation
measurement method: systolic pressure at
125 mmHg, diastolic pressure at 83 mmHg
With both methods, a pressure transducer measures the
cuff pressure as well as the superimposed pressure
pulsations. During blood pressure measurements, the
cuff must be at heart level. If this is not ensured, the
hydrostatic pressure of the liquid column in the blood
vessels will lead to incorrect results. (Each 10 cm
difference result in a pressure deviation of 8.0 mmHg.)
When the patient is sitting, lying, or standing during
measurements the cuff is automatically at the correct
level.
1.2 Functional Description
The PHYSIO-PORT UP monitor accommodates the
blood pressure measuring system and a microprocessor
for system control and data processing.
A second microprocessor with a second pressure
transducer and a second valve are provided for control
of the technical safety.
The monitor is powered by two AA size batteries
(either rechargeable NiMH batteries or alkaline
batteries).
