18.
Ext. Power/ Charging Int. Battery indicator
– Green LED indicates the unit is operating on
external power and the internal battery is being charged. Red LED indicates power switchover
to internal battery. Push Silence/Reset to clear red LED.
Alarm Set-Up and Indicators
19.
▲
Paw
(4 to 99 cmH
2
O) – Press to select High Paw (airway pressure) Alarm Limit for all
breath types using
▲
Up/
▼
Down buttons.
20.
▼
Paw
(3 to 98 cmH
2
O) – Press to select Low Paw (airway pressure) Alarm Limit for mandatory
breaths using
▲
Up/
▼
Down buttons. The
▼
Paw Alarm is not active in the SPONT Mode.
21.
▲
V
•
I
(1.1 to 50 L/min) – Press to select (flashing) the High Minute Volume Alarm limit for
adjustment using
▲
Up/
▼
Down buttons. A non-flashing display indicates the measured
inspired minute volume.
22.
▼
V
•
I
(0.1 to 49 L/min) – Press to select (flashing) the Low Minute Volume Alarm limit for
adjustment using
▲
Up/
▼
Down buttons. A non-flashing display indicates the measured
inspired minute volume.
23.
▲
Paw (Alarm) indicator
– Flashing LED indicates a violation of the High Paw (airway
pressure) Alarm or High Baseline Pressure Alarm (built-in). Violation of this alarm terminates
the breath and a message appears in the Message Display Window.
24.
▼
Paw/Apnea (Alarm) indicator
– Flashing LED indicates a violation of the Low Paw
Alarm, the Apnea Alarm Delay (no time or patient triggers are detected for 30 seconds) or
the Low Baseline Pressure Alarm and a message appears in the Message Display Window.
25.
▲
V
•
I
(Alarm) indicator
– Flashing LED indicates a violation of the High Minute Volume
Alarm limit.
26.
▼
V
•
I
(Back-up Vent) (Alarm) indicator
– Flashing LED indicates a violation of the Low
Minute Volume Alarm limit. A violation of this limit activates Back-up Ventilation (BUV). BUV
is unavailable for 60 seconds following a parameter change.
27.
Device Alert (Alarm) indicator
– Flashing LED indicates an internal ventilator problem.
Ventilation will cease. Use an alternate method of ventilation and send unit in for service.
Special Functions
28.
Silence/Reset
– Mutes the audible portion of all patient related alarms for 60 seconds (does
not silence Device Alert). It also clears any latched alarm indicators, when the alarm condi-
tion is no longer active. To adjust alarm buzzer volume, press and hold to toggle the alarm
volume between Loud and Quiet.
29.
Manual Inflation
– Press to deliver a manual inflation. Available in the A/CMV and SIMV
modes for both Volume and Pressure controlled breaths.
30.
Int. Battery (Push to Test)
– Yellow LED indicates operation from internal battery power.
Blinking Yellow LED indicates a power switchover from external to internal (battery) power or
a low battery condition. Blinking red LED indicates an empty battery condition. A message
appears in the Message Display Window.
Press this button to display Battery Charge Level in the bottom of the Paw gauge. Red area
means not charged. Blue area means partially to fully charged. Test only when running on inter-
nal battery.
31.
Humidifier On
(19 ° to 39 °C) – (For model HT50-H/HT50-HB with built-in humidifier only)
Green LED indicates humidifier is active. Red LED indicates an alarm condition and humidifi-
er is turned off (alarm description is in Message Display Window). When pressed, the display
flashes and the target temperature can be set. Five seconds after an adjustment is made the
display stops blinking and measured temperature is displayed.
{Message Display Window}
Patient Set Up and Parameters
1.
On/Standby
– Press to change the power position
.
Off /Standby
→
Setting condition
→
On
→→
Off /Standby
2.
Push to Unlock
– LED lit = Auto Lock is On. Press and hold 1 second to unlock the front
panel. If Auto Lock is disabled in User Set Up, button does not operate.
3.
SPONT
– Press twice to select SPONT mode. LED lit when active.
Adjust Psupport as needed to assist spontaneous breathing
.
4.
SIMV
– Press twice to select SIMV mode. LED lit when active.
PSupport can be added to assist spontaneous breathing.
5.
A/CMV
– Press twice to select A/CMV mode. LED lit when active.
6.
▲
Up/
▼
Down Buttons
– Press to increase or decrease a parameter when the parame-
ter is selected/flashing. When no parameter is selected/ flashing, press to select between
sets of monitored values or unit information in the Message Display Window.
7.
Ptrig (Sensitivity)
(-9.9 to 0 cmH
2
O) – Press to select Ptrig for adjustment using
▲
Up/
▼
Down buttons. Sets the negative pressure below PEEP the patient must
generate to trigger the ventilator.
8.
PEEP/CPAP
(0 to 30 cmH
2
O) – Press to select PEEP/CPAP for adjustment using
▲
Up/
▼
Down buttons. Sets the baseline pressure during the exhalation phase
.
9.
Psupport
(Pressure Support > PEEP) (0 to 60 cmH
2
O) – Press to select Psupport for
adjustment using
▲
Up/
▼
Down buttons. Sets the added support pressure (above PEEP)
for spontaneous breaths in SIMV and SPONT modes. Ps PEEP/CPAP cannot
exceed 60 cmH
2
O
.
10.
ƒ (Frequency)
(1 to 99 b/min) – Press to select ƒ for adjustment using
▲
Up/
▼
Down
buttons. Sets the number of time-triggered breaths in A/CMV and SIMV modes.
11.
tI (Inspiratory Time)
(0.1 to 3.0 sec) – Press to select tI for adjustment using
▲
Up/
▼
Down buttons. Sets inspiratory time for Volume Control and Pressure Control
breaths.
12.
Volume Control
(100 to 2200 mL) – LED lit = Volume Control active.
Press to select Tidal Volume for adjustment using
▲
Up/
▼
Down buttons. Sets Tidal
Volume for mandatory breaths in A/CMV and SIMV modes
.
13.
Pressure Control
(5 to 60 cmH
2
O) – LED lit = Pressure Control active.
Press to select target pressure for adjustment using
▲
Up/
▼
Down buttons. Sets target
pressure for mandatory breaths in A/CMV and SIMV modes. The target pressure is refer-
enced from zero baseline.
Monitoring
14.
Message Display Window
–Displays monitored parameters or unit information,
alarm conditions and setting limitation messages. Monitored parameters include VT,
V
•
I, ƒtot and Paw (P/M/B [peak, mean, baseline]). Unit information incudes hours (H),
software version (S) and alarm buzzer volume (L-loud or Q-quiet).
15.
V
•
– LED lit =
V
•
(flow) displayed.
Press to display the calculated flow (based on tI and VT settings) for volume controlled,
mandatory breaths.
V
•
display is not available when Pressure Control is active.
16.
I:E
– LED lit = I:E displayed.
Press to display I:E Ratio. When the I:E Ratio is inverse, the indicator blinks with each
breath.
17.
Pressure Gauge
– Displays airway pressure in cmH2O/mbar. Also displays the Internal
Battery Charge Level (Red or Blue area) when Int. Battery button is pressed.
Prox Line
Connector
Gas Output
Connector
Single limb breathing
circuit with prox line
Reusable
Exhalation Valve
Prox
Inline Filter
Exh. Drive Line
Connector
Model HT50-H1 (or HT50-H1B)
Message Display Window
Test Only When
Powered On
Int. Battery
1
2
5
4
3
6
7
10
8
11
9
12
13
19
15
16
20
21
22
17
23
25
24
26
27
18
28
30
29
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