GCE MediVital Instrucciones De Uso página 5

A – INLET STEM
The combination valve is fitted to gas cylinder by a threaded inlet stem. The inlet stem can
be taper threaded or parallel threaded with different size depending on the cylinder size and
material.
B – FILLING PORT
EN
A filling port is provided for filling the gas cylinder at a filling station, it has no function for patient
use. It includes a non-return valve (NRV). The NRV means that special filling adaptors are
required to vent gas from the cylinder during the filling process (venting and/or vacuuming of
cylinders).
C – INLET PRESSURE INDICATOR
Inlet pressure indicator is intended to indicate amount of gas in the gas cylinder. The pressure
indicator is of an active type which means it indicates amount of gas in the gas cylinder
whether the shut-off valve is opened or closed.
D – SHUT-OFF VALVE
The combination valve is provided with a shut-off valve to isolate the gas in the cylinder from
the rest of combination valve functions. It must be opened during cylinder filling and patient's
therapy. Part of the handwheel is an indicator showing open/close status of the shut-off valve.
The shut-off valve open/close status indicator is for guidance only. The shut-off valve
may not be fully off when closed status is showing. Fully closed status has to be
checked by ensuring the shut-off valve is turned to OFF position (clockwise) and gas
supply to the outlets has stopped.
The shut-off valve must not be used in the "partly ON" status because even though gas
is supplied to the outlets, the flow can be limited due to insufficiently opened shut-off
valve.
E – RESIDUAL PRESSURE VALVE
Combination valve is equipped with a residual pressure valve with function to retain a
minimum positive pressure in the gas cylinder to avoid contamination of the cylinder content
by atmospheric air. During cylinder gas ventilation through the filling port the residual pressure
valve is by passed.
F, G – FLOW CONTROL HEAD "F" AND FLOW OUTLET "G" (OPTION)
Combination valve can be delivered with a flow control head "F".This function is used to supply
adjustable gas flow rates (l/min) at atmospheric pressure directly to a patient through the flow
outlet "G", for instance through a cannula or a facemask. The flow outlet "G" is equipped with
hose fitting (hose nipple) or a threaded type (for accessories to be connected via threaded
connection).
Movement of the flow outlet 'G' is normal due to the method of fixing in the main body. It
doesn't indicate a faulty flow outlet.
H – PRESSURE OUTLET OR QUICK COUPLER (OPTION)
The combination valve may be fitted with a pressure outlet. The pressure outlet is supplied
with gas direct from the low-pressure part of the combination valve and it is fitted with a gas
specific medical quick coupling connector also called "quick coupler". The user can connect
another piece of equipment to this outlet with a gas specific male probe (see appendix nr. 2).
The quick coupler self seals when the male probe is disconnected. This outlet is for supplying
gas at a controlled pressure to power medical devices, for instance medical ventilator.
I - PRESSURE RELIEVE VALVE OF LOW PRESSURE PART
Pressure relieve valve secures the low pressure part of combination valve and connected
medical devices against over-pressure. If the gas pressure is decreased enough after the
pressure relieve valve activation, it will closes itself.
J - EXCESS FLOW DEVICE OR DIP TUBE (OPTION)
Excess flow device ensures safe ventilation of gas from gas cylinder in case the combination
valve is broken above inlet stem (e.g. cylinder fall). Dip tube does not have such function.
Excess flow device and dip tube are to avoid contamination from cylinder entering the
5/104