Treaton MV200, User Manual

Page: 114 / 222

4.17 Alarms
4-66
No Message Alarm
log
Indica-
tion
zone
Comment
23 Standby mode
(Standby mode)
x
Activation of Standby mode
24 Manual breath
(Manual breath)
x
Activation of Manual breath function
25 Technical Message x
(1 or 2)
(Tech. msg. x)
x Service messages. A detailed de-
scription of the malfunction and an
indication of the unit in which the
malfunction occurred are given in
Table App.5.2, Appendix 5.2.
4.17.5 Special alarms of iSV mode
Special alarms and messages of iSV mode are formed in addition to the standard alarms of all
modes.
High priority alarms:
1. "Target MV is unreachable"
2. "Vt less 4.4 ml/kg" ("Vtmin reached"). This alarm doesn’t depend on the standard tidal
volume alarm and it can not be corrected or disabled (except standard disabling of sound
for 2 minutes).
Low priority alarms:
1. "Plimit reached!"
Conditions of special alarms and messages formation
“Target MV is unreachable” alarm can be generated in two cases:
In the first case the alarm is generated immediately when the change of mode settings is not
compatible with the actual values of existing parameters of respiratory mechanics of the patient.
In the second case the alarm is generated with the delay when it is detected that the real minute
ventilation does not reach the target value. The delay is necessary to achieve the set minute
ventilation, for example in the case of changing the target value from 25 % to 300 % with the
maximum pressure increase in step of 2 cmH
2
O.
To identify situations when the target minute ventilation can not be achieved, the identification of
the expiratory minute volume stabilization is performed, and if the minute volume actually does
not reach the target value - the alarm is generated. This eliminates false triggering of the alarm.
Alarm “Vt less 4.4 ml/kg!“. This alarm is displayed if Vt is less than Vt min on 3 %, but with delay
at least 20 seconds with the retained alarm condition.
“Plimit reached!“ message is formed when the circuit pressure is Pmax - 10 cmH
2
O. The in-
crease of inspiratory pressure stops - inspiration continues at the pressure Plimit.
4.17.6 Emergency and technical failure modes
Full emergency mode
The full emergency mode (FEM) is switched on automatically in case of ventilator’s module mal-
function during the operation. FEM cannot be enabled by the user.
Emergency mode of device is intended only to rescue the patient at the technical failures of the
device and to give reserve time to transfer the patient to another type of ventilation. Alarm mod-