Covidien Newport HT70, Operator'S Manual

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PC
Operator's Manual 10-3
During Pressure Support, tidal volume is determined by the pressure change during the breath
(PS setting), slope rise, expiratory threshold, PS max i-time, patient effort, and patient respiratory
mechanics.
10.6
PC
(Pressure Control Ventilation)
Pressure Control mandatory breaths are available during A/CMV and SIMV modes. The ventilator
targets and maintains patient airway pressure at the set Pressure Control level above ambient (not
above PEEP) throughout inspiration. Breaths are cycled from inspiration to exhalation when (1)
the set i-time elapses, or (2) Paw exceeds the Pressure Control setting by 8 cmH
2
O (mbar).
Maximum airway pressure will not exceed the user set High P alarm setting.
During Pressure Control breaths, tidal volume is determined by the pressure change during the
breath (PC-PEEP settings), slope/rise, i-time, patient effort, and patient respiratory mechanics.
When disconnecting the patient circuit during PC or PS ventilation (that is, for suctioning), the
flow may increase in order to compensate for the low pressure. After reconnecting the patient cir-
cuit, the flow will automatically readjust to meet the patient’s demand.
10.7
VC
(Volume Control Ventilation)
Volume Control mandatory breaths are available during A/CMV and SIMV modes. During Volume
Control breaths, the ventilator delivers the set tidal volume at the flow and i-time shown on the
Main screen and with the flow waveform set on the More screen. If the tidal volume setting is
changed while the ventilator is operating, the change takes place in increments over a series of
breaths.
When tidal volume is adjusted, inspiratory time remains constant and mandatory flow changes.
During Volume Control breaths, tidal volume is determined by the tidal volume (VT) setting.
If an attempted tidal volume setting results in a flow rate in excess of 100 L/min or less than 6 L/
min, flow adjustment ceases, the user is alerted by an audible beep, and a message appears in the
message display window. To allow further volume adjustment, change the i-time to set the flow
to meet the patient’s need.
10.8
Backup Ventilation
Backup Ventilation activates when the currently linked alarm occurs. This function can be linked
with the Low Minute Volume (MVI/MVE) alarm, the Apnea alarm, or both alarms. During Backup
Ventilation, the linked alarm(s) will sound and the message window will indicate that Backup Ven-
tilation is in use. There are default Backup Ventilation parameters, but the user may adjust these
in the More>Utilities>Custom Setting>BUV screen.