26
The main limb is the conduit through which fresh gas is delivered to the
patient from the ventilator. The pressure line is used to measure the
patient’s airway pressure. It must be connected to the blue port on the
CCV marked PATIENT AIRWAY. The control line is used to control
when the patient is allowed to exhale. It must be connected to the silver
port on the CCV marked EXHALATION VALVE.
NOTE: The breathing circuit should never be used to pull the CCV.
Exhalation Valve
The exhalation valve consists of a plastic main body, silicone disc, top
cover, and securing ring as shown below. Together, these components
form an airtight seal and ensure that gas is directed the correct way
during each part of ventilation.
During inspiration, fresh gas flows into the main body of the valve. At
the same time, gas from the control line presses down on top of the
silicone disc, which seals off exhaust holes in the side of the main valve
body. The fresh gas for ventilation flows directly through the main body
and to the patient. The pressure line at the bottom of the valve allows
the ventilator to measure the patient’s airway pressure.
During exhalation, the control line releases the pressure on top of the
silicone disc, allowing it to lift up and expose the exhaust holes on the
side of the main body. The gas exhaled by the patient is free to exit
these exhaust holes and enter the room. The cycle, illustrated below,
repeats as the next breath begins.
Main body
Securing ring
Top cover
Silicone disc
Содержание CCV
Страница 1: ...Gradian CCV User Guide Gradian CCV User Guide ...
Страница 2: ......
Страница 3: ... TABLE OF CONTENTS ...