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7.2
Flowmeter box
7.2.1 Dosing and administration of fresh gas
The term " fresh gas " means the gas mixture that is dosed in the anaesthesia
module and in the anaesthetic vaporizer
The fresh gas is continuously delivered to the valves group to be administered to the
patient.
The excess of gas that may be present in the patient circuit is automatically
eliminated through the scavenger connection.
The quantity (in l/min) of fresh gas can be greater, equal to or lower than the Minute
Volume:
•
if it is higher or equal it is an high flow open circuit (without soda lime
canister)
•
if it is lower it is a semi-closed circuit
•
if the flow is lower than 1 l/min it is a low flow semi-closed circuit
Low flows semi-closed circuit ( REBREATHING )
•
The fresh gas flow in the patient circuit is a litter higher than the basal
consumption of the patient; therefore, the used gas concentration can be very
different than the ones of the fresh gas.
•
There is a high consumption of soda lime.
•
There is a low consumption of fresh gas.
•
The temperature and humidity of the fresh gas are optimal.
MORPHEUS
WARNING! Risk of injury to the user / patient
Administration of fresh gas in the breathing system
In order to deliver the fresh gas flow into the valves group (breathing
system) press the APL key on the work shelf.
Otherwise, pressing the AUX key the fresh gas will go onto the TO
and FRO.
Required supervision: pay attention to the gas concentration
monitoring (O 2 , N 2 O, CO 2 and halogenated gas).
7-3
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