Physio Control LIFEPAK 15, Operating Instructions Manual

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Specifications and Performance Characteristics
238
LIFEPAK 15 Monitor/Defibrillator Operating Instructions
Table 42
Alarm Performance Characteristics
CHARACTERISTIC DESCRIPTION
Heart Rate Alarm Time For a 1 mV, 206 bpm tachycardia, the average detection time
was 4.6 seconds.
For a test signal half as large, the average was 4.1 seconds. In this case
the device sensitivity was increased to 5mV/cm.
For a test signal twice as large, the average was 3.1 seconds.
For a 2 mV, 195 bpm tachycardia, the average detection time
was 2.5 seconds.
For a test signal half as large, the average was 2.2 seconds. In this case
the device sensitivity was increased to 5mV/cm.
For a test signal twice as large, the average was 1.5 seconds.
Audible Alarms This is a standalone device. All alarm tones are internal to the
LIFEPAK 15 monitor/defibrillator. The alarm tone volumes range
from 45 to 85 dB.
Alarm violations are manifested by tones, voice prompts, and visual
indications.
Alarm manifestation occurs within 1 second after a displayed parameter
violates its alarm limit. User selectable alarm volume adjustment is
provided. This adjustment does not allow alarm volume to attain/reach a
zero level.
SAS tones reinforce SAS messages provided on the product display.
The following identifies the tone assignments for each type of alarm:
•
The priority 1 tone is used to alert the user to the possibility of death.
This tone is a 440 Hz and 880 Hz alternating tone with a 50% duty
cycle and a 4 Hz alternation frequency. This tone has a volume of 70
±5 dB (A) as measured at a distance of 1 meter from the display. The
volume of the priority 1 alarm is not adjustable.
•
The priority 2 tone (the Quick Set alarm tone) is used to alert the user
that a possible life-threatening condition exists. This tone is a
continuous 698 Hz tone. This tone has a volume that is lower than the
priority 1 tone.
•
The priority 3 tone is used to alert the user that an abnormal condition
exists. Three beeps at 1046 Hz for 100 ms duration each with a 150 ms
silence between the first and second and the second and third,
followed by a 200 ms silence. This tone has a volume that is lower than
the priority 2 tone.
•
Priority 3 tones come in single and repeating types: for a single tone,
the 3-beep sequence sounds only once. For a repeating tone, the 3-
beep sequence sounds every 20 seconds.
• The priority 4 tone is a momentary tone between 500 and 1500 Hz.
This tone has a volume that is lower than the priority 3 tone.
Specific characteristics are:
−
QRS and Volume Setting Tone—100 msec duration at 1397 Hz—
4 msec duration at 1319 Hz.