Section 5 - Operation
Vaporizer
Overview
The Vapor 19.1 adds an anesthetic gas to the fresh gas stream by
producing a precisely metered amount of the vapor of a particular liquid
anesthetic. The vaporizer is installed in the fresh gas line upstream of
the patient breathing system (semi-closed, semi-open system).
WARNING: The vaporizer must not be connected downstream of the
fresh gas outlet of the anesthesia machine.
For low flow (fresh gas flows lower than 250 ml/min) or closed system
anesthesia, breathing circuit concentrations may differ considerably from
the vaporizer setting. When performing anesthesia with low flow or
closed system techniques, it is essential to monitor inspiratory and
expiratory anesthesia concentration, oxygen concentration, expiratory
volume, and airway pressure in the circuit.
The carrier gases used must be dry and free of oil and dust. The limits
for moisture are as follows:
• dew point of oxygen ≤ 5° C
• dew point of air ≤ 5° C
• water contents of nitrous oxide ≤ 2 mg/l
NOTE: For information on the Tec 6 desflurane vaporizer, refer to its
instruction manual.
Filling Systems
Two filling systems are available for the Vapor 19.1:
• Open funnel system
• Key indexed safety system
The following figure shows vaporizers with the two different types of
available filling systems.
5-2-1
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