User's Manual

Ultraview Digital Telemetry
33
During blood pressure measurement, the inflated cuff reduces blood flow to the
limb to which it is applied. Do not apply a cuff to a limb that has restricted blood
flow. Check the patient periodically.
Patient Factors Affecting Readings
Excess patient movement, speech, or muscle contractions as a result of severe
pain or shivering can interfere with automated NIBP readings. Ensure that the
patient is quiet and not moving during NIBP readings just as you would manual
readings. The patient must avoid applying external pressure to the cuff during
readings. Institute measures to minimize shivering and alleviate pain.
Some arrhythmias may cause beat-to-beat pressure fluctuations that can make
obtaining NIBP readings more difficult. If it becomes difficult to obtain readings in
the presence of arrhythmia, pressure should be temporarily verified using another
method (i.e., ausculatory, oscillometric, Doppler). Pressure also varies cyclically
with normal respiration. With deep respirations or in certain patients this effect
may be enhanced, increasing reading variability.
For patients in shock, indirect methods of measuring pressure (auscultatory,
oscillometric, Doppler) may not be reliable because of peripheral vascular
changes. These changes include peripheral vasoconstriction and diminished
peripheral circulation resulting from shunting of blood to central organs. In some
cases, peripheral pulses or Korotkoff sounds may be diminished or disappear in
spite of adequate blood pressure. In such cases, measuring a cuff pressure may
be impossible or give misleading results. Direct blood pressure measurements
(invasive) should be considered in patients with signs of shock or any patient who
rapidly becomes unstable for unknown reasons.
Setting Up the ABP Monitor
The 90217 ABP must be initialized prior to the monitoring of each patient.
Initialization is accomplished using the 90121 ABP report management system.
(Refer to the section Setting Up the ABP Monitor in the 90217 Operations Manual,
P/N 070-0137-xx.)
!
• Do not apply a blood pressure cuff to a limb being monitored
with a pulse oximetry sensor, because SpO
2
is affected during
NIBP readings. Avoid applying a cuff to a limb that has an
intravenous line in place. Do not apply a cuff to a limb that has
restricted blood flow.
• Use only single hose cuffs to ensure proper operation.
Spacelabs Medical’s hoses are non-conductive with respect to
defibrillator discharge effects.
C
AUTI
O
N:
• Failure to initialize the 90217 as specified may result in the
display and storage of measurements that are incorrect or
that were acquired from a prior patient.