6 ECG, Arrhythmia, and ST Monitoring

Arrhythmia Alarms

What is a Timeout Period?

Timeout periods are automatically started when a yellow arrhythmia alarm is detected. During this period, the same alarm condition will not generate another alarm. Alarm conditions further down the same arrhythmia alarm chain will also not generate an alarm, but alarms further up the chain will: see “Arrhythmia Alarm Chaining” on page 115).

This setting can only be changed in Configuration Mode.

♦To view the timeout period configured for your monitor, in the Setup Arrhythmia menu, see the menu items TimeOut 1st and TimeOut 2nd.

♦To reset the timeout period, select the Alarms Off or Pause Alarms permanent key and then reselect it.

Resetting the Timeout Period

Switching alarms off and then on again cancels all visual and audible indicators and resets the timeout periods.

Silencing an alarm cancels all visual and audible indicators, if the alarm condition is no longer present.

How are Yellow Arrhythmia Alarms Indicated?

When a yellow arrhythmia alarm is generated, it triggers visual and audible indicators.

Behavior of Unsilenced Arrhythmia Alarms

Yellow arrhythmia alarms are always set to latch visually for three minutes.

Yellow arrhythmia alarms that have not been silenced behave as explained in this table:

Alarm condition

Example

Configured time

Short yellow alarm

Alarm message

 

 

out period

tone sounds ...

displayed ...

 

 

 

 

 

Single alarm instance

Non-sustained

All settings

when alarm condition is

for 3 minutes (latching

 

V-tach

 

initially detected

time)

 

 

 

 

 

Continuous alarm condition

HR LOW

All settings

 

until the alarm condition

 

 

 

 

stops, plus a maximum of

Same intermittent alarm

Pair of PVCs

2 minutes or less

 

 

3 minutes latching time

condition, occurring

 

 

 

 

3 minutes or more

each time the alarm

 

 

frequently (more than once

 

 

 

 

condition is detected,

 

per minute)

 

 

 

 

 

provided that the timeout

 

 

 

 

 

 

 

 

period has expired and the

 

 

 

 

alarm message has cleared

 

 

 

 

 

 

Behavior of Silenced Arrhythmia Alarms

If you silence a yellow arrhythmia alarm and the alarm condition still exists, the visual indicators continue until the condition stops. You will not get a realarm for the same condition or another condition lower down on the same chain until the alarm condition has stopped and reoccurred, and the timeout period has expired.

If you silence a yellow arrhythmia alarm and the alarm condition has stopped, the visual indicators are immediately cleared. Silencing an alarm does not reset its time out period, so you will not get a realarm for the same condition or lower on the chain until the time out expires.

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Philips MP40/50 manual How are Yellow Arrhythmia Alarms Indicated?, What is a Timeout Period?, Resetting the Timeout Period
Page 133 Page 135

MP60/70/80/90, MP40/50, MP20/30 specifications

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