Av2+ Anesthesia Ventilator; Overview - Dräger Narkomed 2B Operator's Instruction Manual

Overview

The AV2+ anesthesia ventilator is a volume preset, time cycled, pressure
limited ventilator with electronic timing, pneumatic circuitry and
independent controls for frequency, inspiratory to expiratory (I:E) ratio,
inspiratory flow rate, tidal volume, and inspiratory pressure limit.
Pneumatic power (bellows drive gas) to the ventilator is supplied
through the hospital pipeline supply or through reserve cylinders on the
anesthesia machine. The pressure of the supply gas must be between 40
and 60 psi. The ventilator will not function if this pressure drops below
32 psi. Electrical power is supplied by the Narkomed 2B's AC power
source, or, in event of AC power failure, by the backup battery. A fully
charged battery can power the ventilator for approximately 30 minutes.
The anesthesia ventilator is designed for use with a North American
Dräger absorber system, which incorporates a manual/automatic selector
valve. This valve allows you to select either the breathing bag and
adjustable pressure limiter (APL) valve for manual ventilation, or the
ventilator bellows for automatic ventilation.
During automatic ventilation, the manual/automatic selector valve
isolates the absorber's APL valve from the breathing system. To
compensate for the continuous introduction of fresh gas into the
breathing system, the ventilator incorporates a relief valve mounted
behind the bellows chamber.
When the bellows is completely filled, any excess gas in the system is
released to the scavenging system through the ventilator relief valve. As
in any ascending bellows, the force needed to overcome gravity acting on
the bellows causes a positive end-expiratory pressure (PEEP) within the
breathing system. For the Narkomed 2B, the PEEP is approximately
2 cmH O.
2
The monitoring system's breathing pressure and expiratory flow
waveform displays can be used as an aid in adjusting the ventilator and
establishing alarm criteria.
WARNING: Regardless of the indications of any alarm or monitoring
device, patient chest movement shall be the primary
indication of a securely connected, properly ventilated
patient.
A front view of the AV2+ anesthesia ventilator is shown in the following
figure.
Section 5 - Operation

AV2+ Anesthesia Ventilator

5-8-1