Weinmann MEDUMAT Easy CPR Instructions For Use Manual page 139

The pneumatic unit comprises the following components:
• Compressed gas connection with filter sieve
• Input pressure regulator
• 3/2-way valve
• Booster valve with metering device
• Vent valve
• Pressure relief valve
• Connection for ventilation hose
There is a pressure of max. 87 psi (6 bar) at the compressed gas
connection, which is reduced dynamically by the input pressure
regulator (V1) to approx. 36 psi (2.5 bar). This pressure is found at
the 3/2-way valve (V2), the booster valve (V3) with metering device
and the vent valve (V4).
For inspiration, an electrical impulse opens the 3/2-way valve (V2).
The booster valve (V3) with metering device opens and the vent
valve closes (V4). Oxygen flows via the ventilation hose to the
patient valve. The quantity of oxygen depends on the encoder
position and the opening within the metering device. If the
ventilation pressure in the patient valve increases to > 100 cmH
(> 100 mbar), the pressure relief valve (V5) is triggered.
For expiration, an electrical impulse closes the 3/2-way valve (V2).
The booster valve (V3) with metering device closes and the vent
valve opens (V4). The ventilation hose is vented. The patient
exhales via the patient valve.
The demand flow is triggered by an inhalation trigger. At the same
time, the 3/2-way valve (V2) is switched. The booster valve (V3)
with metering device opens and the vent valve closes (V4).
The microprocessor-controlled electronics set the ventilation
parameters and monitor ventilation as well as the oxygen and
power supply. A visual and audible alarm may occur.
13 Technical data
CPR
MEDUMAT Easy
O
2
EN 139