Medical Gas Cylinders
Gas Supply Systems
Anesthesia Machine
Vaporizers, CGO, Manifolds, Flowmeters
Breathing Circuits
100
These are the most common gas cylinders used in anesthesia
What is E cylinders and H cylinders
100
These are the three main components of the medical gas pipeline system
What is the
Central supply
Pipelines to points of use
Connections to equipment
100
These are 3 safety features that prevent hypoxic gas mixtures.
What is the
Oxygen supply pressure failure alarm
Pressure sensor shut-off (fail-safe)
Gas flow proportioning
100
This mechanical flowmeter is always placed to the right from the other gases for this reason
Mechanical O2 flowmeter is placed downstream to prevent other gases from streaming in if the system is no longer intact.
100
These are 3 of the 6 desirable characteristics of a breathing circuit
What are
Low resistance to gas flow
Minimal rebreathing of exhaled gases
Removal of CO2
Rapid changes of delivery
Warm and humidification
Safe disposal of waste gases
200
Nitrous oxide will read at this PSIG until the liquid runs out.
What is 745 PSIG?
200
Bulk storage of oxygen for a facility typically falls into three main categories for these types of facilities.
What is
Liquid oxygen for large facilities
Series of H tanks for small, rural facilities
Oxygen concentrators for deployment or humanitarian missions
200
The low pressure gas system is comprised of the following parts
What are all parts downstream of the gas flow control valves?
200
These are 3 of the 5 aspects of the vaporizer manifold
What are
Located downstream from flowmeters
Removed or added by user
Interlock system to prevent more than 1 vaporizer being used
Prevents carrier gas from entering a non-utilized vaporizer
Low pressure check = manifold check
200
Barolyme or soda lime is part of this component of the anesthesia breathing circuit
What is the CO2 absorber
Color indicator of violet when used up
May regenerate
Irregular surface maximizes surface area
Neutralization results in H2O and heat
300
The DOT requires gas cylinders to have these 3 markings and a tag that indicates what
What is the
Service pressure
Individualized codes
Inspection Date
Tag (Full, In Use, Empty)
300
These are two noninterchangeable interfaces that are specific to a gas outlet
What is quick connector (which is not standardized) among manufacturers
DISS (Diameter Index Safety System)
300
This apparatus converts a variable high input gas pressure to a constant, lower output pressure
And when triggered it causes 3 events to occur
What is the pressure regulator?
What are the pressure relief valve
Emitting a loud sound
Loss of O2 pressure
Failure of O2 delivery
300
The common gas outlet is designed not to do the following
What is not be interchangeable with the scavenging system
It is designed to have all gases exit through it; to be used with jet ventilation and have a female fitting
300
This closed breathing circuit is the most common circuit used and it has three required components
What is the circle breathing circuit
What is must have
FGF
Pop-off valve
CO2 absorber
Advantage = warmth and humidification
400
Cylinder pressure relief valves come in these three types.
What is
Fusible plug (metal alloy melts)
Frangible disk assembly (breakable metal disk)
Safety relief valve (spring loaded)
400
These 3 apparatuses are safety features that are used to protect the integrity of the medical gas delivery systems.
What are the
Emergency shut off valve
DISS and quick connectors
Non-compressible hoses
Regulated by NFPA
400
This valve opens directly from the oxygen pipeline or first stage regulator to the common gas outlet at the following flow rates
Oxygen flush valve with flow rates between 35-75 L/min
400
The main electrical switch on the anesthesia will allow what to occur even during a power failure
What is allow gas flow to continue
It also has multiple outlets for anesthesia monitors
But can overload.
Never let OR staff plug in non-emergency equipment into the anesthesia machine
400
The commonalities of theses circuits are
What is
No CO2 absorption
No separate inspiratory or expiratory limbs
FGF and APL valve varies in location
500
This is a safety system that matches the yoke to the valve port.
And it has this many different pin positions.
What is the pin index system?
What is 7?
500
These are 4 of 7 hazards that may occur with the medical gas delivery system
What are
Insufficient pressure
Crossed pipelines
Debris
Depletion of central supply
Failure of alarms
Pipeline leaks
Frozen regulators
500
The purpose of the oxygen flush valve
What is
Filling the breathing system by by-passing the vaporizers
Dilutes the anesthetic
Risk of barotrauma
Recessed button
500
What is this image?
Variable bypass vaporizer
Splits FGF between the bypass and the vaporizer
Higher FGF more volatile agent is used
500
This Mapleson D system has a coaxial modification and has a high risk for what.
What is the Bain system and it has a high risk for kinking of the inner tubing and disconnect