Mallinckrodt NPB-190 Operator's Manual download pdf (Page 46)

Start-Up and Use

alarms are distracting and potentially time-consuming. However,

if interference persists, an alarm should notify the attendant.

The NPB-290 loss-of-pulse alarm is designed for use in

environments in which the pulse can be obscured by interference.

Most loss-of-pulse alarms are attributable to interference from

patient motion, which typically is brief.

When the pulsatile signal is lost, the NPB-290’s ability to identify

interference from motion becomes particularly important because

the response of the monitor is determined by the presence or

absence of interference from patient motion. Because a

spontaneously moving patient can be assumed to have a pulse, as

long as continuous motion is detected, the NPB-290 continues to

search for the pulse.

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Mallinckrodt NPB-190 Operator's Manual Page 46