
22
counterclockwise.
With patient airway connected to patient port observe and note maximum
pressure during cycle.
Detach patient airway from WYE and block patient port.
Adjust MAX. PRESSURE control to a level 5 to 10 cmH
2
O above that
reached with patient connected.
Re-connect the patient airway to the WYE.
The IC-2A will now be limited to the tidal volume set, but maximum pressure
will be limited in the event of changes in resistance or compliance.
b) For pressure-limited operation:
Adjust MAX. PRESSURE control until the desired pressure limit is attained
during inspiration. Note that the MAX. PRESSURE level is somewhat
affected by the flow rate. It should be set with the particular flow rate used.
The IC-2A will now be limited to the pressure set. When operating in this
mode, the exact Tidal Volume is unknown, since gas is vented to the
atmosphere through the exhalation valve as soon as the present pressure
limit is reached during each inspiration.
Step 12- If PEEP is to be used, set the desired level using the PEEP/CPAP
control.
Adjust control until the pressure gauge indicates the desired level during
the expiratory time. Note that the PEEP level is somewhat sensitive to
flow rate. The PEEP control should be set with the flow rate used. When
using PEEP, the inspiratory effort control should be reset to compensate
for each PEEP level used.
Note:
During IPPV an assist control breath will cause response of both the cycle and
demand indicators. A control cycle will activate only the cycle indicator.
B. SYNCHRONIZED INTERMITTENT MANDATORY VENTILATION
(SIMV)
Step 1- NORMAL/SIMV selector is set to SIMV position.
Step 2- set inspiratory effort control for proper patient triggering.
The volume of gas delivered during spontaneous breaths, equal to insp. time X flow
rate, should be as close as possible to the patient's tidal volume. However, if it is
set too high the excess gas not breathed by the patient is vented to atmosphere
through the exhalation valve. If it is too low and the patient requires more gas,
another bolus of gas will automatically be delivered to the patient as long as the
Содержание 2005IC
Страница 7: ...5 ...