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Human NIBP Nano
Owner’s Guide
Checking measurement stability
If the Human NIBP Nano is returning error messages or failing to start a
measurement, it is recommended to disconnect the finger cuff air hoses
from the Wrist Unit, which removes any residual air pressure in the finger
cuff s. You should then turn the Human NIBP Nano Interface off and back
on, reapply the finger cuff (s) and restart the LabChart soft ware before
attempting to resume a measurement.
Note: The Human NIBP Nano has a narrow temperature operating range
(see Environmental Specifications on page 62) and should be placed
apart from other equipment for optimal operation.
Subject Instructions
If blood pressure is measured on cold fingers, the measurement can
be diff icult or even impossible. Therefore, it is recommended to do
measurements at room temperature, and to keep the hand warm during
ambulatory measurements. Ask the subject to wear comfortable and
suff iciently warm clothes. Make sure the subject is in an environment at
room temperature at least 15 minutes before the start of a measurement,
especially in winter time. It is important not only to keep the hand and
fingers warm, but also the arm and neck.
Continuous blood pressure is oft en more variable than expected. If you are
interested in a detailed blood pressure response ask the subject to refrain
from speaking during the measurement and explain to the subject that
movements of hand and fingers, laughing, coughing, and so on, may cause
waveform artifacts in the finger blood pressure signal.
Note: Any blood pressure reading can be aff ected by the measurements
site, the position of the patient (standing, sitting, lying down), exercise, or
the patient’s physiological condition.
Height Correction
The height reference level should be selected carefully. If the subject is
walking around or sitting it is best to place the reference part on the chest
at the level of the right atrium in the mid-axillary line. In the recumbent
position it is best to place the reference ending at mid chest level. If the
experiment focuses on the dynamic response of the hemodynamic system
aft er a change in posture it is usually best to keep both the transducer and
the reference ending at the level of the right atrium to avoid a dynamic
response of the height correction system.
As a general rule try to keep the cuff ed fingers approximately at heart
level, even with a connected Height Correction Unit.
