User's Manual

Digital Telemetry

17-17

SIGNAL INTERFERENCE

The signal interference message indicates, via the displayed triangle squelch

waveform, that an interfering signal has been detected. A signal can no longer be

detected because of interference from a stronger signal source lasting more than

0.5-seconds. A low priority alarm tone sounds whenever this message is

displayed in the waveform zone.

IS SIGNAL LOSS PERMANENT?

The permanent signal loss message indicates that no RF signal is being detected.

Multiparameter Telemetry (NIBP)

Setting Up NIBP Monitoring

Proper cuff selection and application is critical in ensuring the accuracy of NIBP

readings. To ensure proper cuff selection, first measure the circumference of the

limb at its midpoint. Match the limb measurement to the range of appropriate

circumferences (in centimeters) specified on each cuff. If the cuff bladder is too

wide for the patient, the reading will be falsely lowered; if it is too narrow, the

reading will be falsely elevated. Undersizing the cuff results in the greatest chance

of error, so a variety of cuff sizes should be available to accommodate your full

patient population.

Apply the cuff snugly. When the cuff is properly applied to an adult, you should be

able to insert one finger between the cuff and the arm. If you can insert two

fingers, the cuff is too loose, which may result in falsely elevated readings. Ensure

that the hose is not kinked when the cuff is applied.

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.

• Do not apply a blood pressure cuff to a limb being monitored

with a pulse oximetry sensor, because SpO

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.