Adjusting The Tidal Volume; Setting The Respiratory Frequency - Dräger Narkomed 2B Operator's Instruction Manual

Section 5 - Operation
AV2+ Anesthesia Ventilator
Using the
Manual/Automatic
Selector Valve
Lever
Adjusting the Tidal
Volume
Setting the
Respiratory
Frequency
5-8-4
The ventilator can be turned on and off with the selector lever on the
manual/automatic selector valve (with the interface cable between the
selector valve and interface panel properly connected).
NOTE: When you operate the lever, let it snap into position. Do not
hold back on the lever; preventing its free movement could
damage the ventilator's sensors.
• To activate the ventilator, move the manual/automatic selector valve
lever to the AUTO position; the green ON indicator on the ventilator
bezel is then turned on.
• To shut down the ventilator, move the manual/automatic selector
valve lever to the BAG position; the green ON indicator on the
ventilator bezel is then turned off.
The tidal volume is adjusted using a self-locking knob, located above the
bellows assembly. The control knob positions a stop within the bellows
canister which limits the upward travel of the bellows and thus sets the
maximum tidal volume of gas delivered to the patient. To adjust the
tidal volume, press the self-locking knob so that it can turn, then set the
desired tidal volume as shown by the setting indicator on the bellows
chamber scale (marked 200–1400 ml). The tidal volume can be adjusted
to achieve volumes between 50 and 1500 ml.
Smaller tidal volumes can be adjusted by setting the pointer below the
200 ml marking on the bellows chamber; larger tidal volumes can be
selected by setting the pointer above the 1400 ml calibration.
As in any volume-preset anesthesia ventilator, the actual tidal volume
delivered to the patient's lungs may differ from the preset volume at the
bellows due to the compliance of the breathing system and fresh gas
flow. To accurately set the tidal volume, refer to the tidal and minute
volume measurements.
The position of the tidal volume indicator can be calibrated for a specific
combination of fresh gas flow and equipment compliance by a North
American Dräger qualified technical service representative.
Use the frequency control knob to set the respiratory frequency from 1 to
99 breaths per minute (BPM) in 1 BPM increments.
Clockwise rotation of the control knob increases the frequency setting,
while counterclockwise rotation decreases the frequency setting.