10
- If continued resistance to insufflation is encountered, check the airway for
obstruction or correct the backward tilt of the head.
- If the patient vomits during mask ventilation, immediately clear the patient’s airway
and then freely compress the bag a few times before resuming ventilation.
- The patient valve may be disassembles and cleaned if excessive amount of vomitus
are obstructing the air flow. For details review the cleaning section of this manual.
- If connecting external devices to the resuscitator, make sure to test for functionality
and consult the instructions for use accompanying the external device.
5.2. Manometer port
WARNING
Use only for monitoring pressure. The cap must always be put on the connector
when pressure is not being monitored.
A pressure gauge can be connected to the manometer port on the top of the
patient valve. (This only applies to the version with manometer port).
Remove the cap (3.1) and connect pressure manometer or the tube for the
pressure gauge (3.2).
5.3. Pressure limitation system
WARNING
Never override the pressure-limiting valve (if available) unless medical and pro-
fessional assessment indicates the necessity. High ventilation pressures may
cause lung rupture to certain patients. If the pressure-limiting valve is overridden
in patients with a bodyweight less than 10 kg (22 lbs.), a manometer must be
used to monitor the ventilation pressure to avoid the possibility of a lung rupture.
If the resuscitator is equipped with a pressure limiting valve, the valve is set to
open at 40 cm H
2
O (4.0 kPa) (4.1).
If medical and professional assessment indicates a pressure above 40 cm H
2
O is
required pressure limiting valve can be overridden by pressing the override cap
onto the valve (4.2). Alternatively the pressure limiting valve can be overridden by
placing the index finger on the blue button while squeezing the bag.
6. Oxygen administration
Administer Oxygen according to medical indication.
Examples of O
2
percentages, which can be obtained with different volumes and
frequencies, can be seen in
. Mark IV (5.1), Mark IV Baby (5.2).
VT: Ventilation volume, f: Frequency
Note: If high ventilation pressure is used, a higher O
2
flow settings is needed
because part of the stroke volume is vented from the pressure-limiting valve.
For infant version, use of supplementary Oxygen without reservoir attached will
limit the oxygen concentration to 60-80 % at 15 l/min.
7. Parts/Materials
Inner bag
Silicone rubber
Outer cover
Silicone rubber
Patient valve housing
Polysulphone
O-Ring (only patient valves with swivel)
Silicone rubber
Patient connector
Polysulphone
Expiratory connector
Polypropylene, reinforced
Outlet cap (option)
Polysulphone
Valve discs
Silicone rubber
Reservoir bag
Polyethersulfone/Polyurethane
Flange nut
Polypropylene, reinforced
Pressure limiting valve
Polysulphone/stainless steel
Override cap
Silicone rubber
