OPRHT70 A0310
5-2
5
Operating the HT70 Ventilator
Standard Test Settings
Mode A/CMV
Breath Type Volume Control
NIV Off
Tidal Volume 500 mL
i time 1.0 sec
RR 15 b/min
Ptrig 1 cmH2O / mbar
$Paw 5 cmH2O / mbar
#Paw 99 cmH2O / 97 mbar
$Min Vol alarm 0.1 L (minimum setting)
#Min Vol alarm 50 L (maximum setting)
PEEP/CPAP 0 cmH2O / mbar
PS 0 cmH2O / mbar
Quick Check Procedure
1. No External Power Alarm Check
o Disconnect the A.C. power supply. Verify that there is an audible
alarm and the alarm LEDs in the HT70 handle flash. Verify that
the Ext. Power LED turns off, and the Message Area turns yellow
and displays the No External Power alarm message. Confirm that
HT70 continues to ventilate.
o Press the Alarm Silence/Reset button and confirm that its LED
lights yellow, the audible alarm is muted and the message area
returns to black.
o Press the Alarm Silence/Reset button again and confirm that the
alarm message clears.
o Reconnect the A.C. power supply. Verify that the Ext. Power LED
lights green.
2. Alarms and Indicators Check
High #P Alarm
o Set the High Paw alarm limit to 20 cmH2O/mbar. Verify that an
audible alarm sounds and the High Paw message displays and
that inspiration ends when pressure reaches the high limit. Set
the High Paw alarm limit back to 99 cmH2O /mbar and verify that
the audible alarm stops and the alarm message remains. Press
the Alarm Silence/Reset button to clear the alarm message.
Low $P Alarm
o Disconnect the test lung from the breathing circuit and verify that
after two breaths an audible alarm sounds and the Low Paw
alarm message displays.
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