Basics of Anesthesia quiz 4
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| Who is responsible for the handling, transportation, storage, and disposal of cylinders ? | USDOT (US Department of Transportation)
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| What other 2 associations contribute to the handling, transportation, storage, and disposal of cylinders? | CGA (Compressed Gas Association), NFP (National Fire and Protection Association)
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| At room temperature, what is oxygen stored as? | Compressed Gas
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| What is the critical temp of oxygen? | -119 degrees C
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| Manifolds reduce to pressure in cylinders of oxygen from what to what? | 2000psi to 50psi
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| Reducing the pressure in the cylinder promotes what? | Safe delivery of the gas
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| What is room temperature? | 20 degrees C/68 degrees F
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| Oxygen is stored as what below critical temp? | A liquid
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| True/False - liquid oxygen must be stored well below its critical temperature of -119 degrees C | True
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| Can gas be liquified by pressure? | Yes, but only if stored below critical temperature (-119 C)
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| Regarding storage of liquid oxygen, why do hospitals prefer this method of storage? | More economical
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| True/False - Anesthesia providers should always have a backup of oxygen in case of pipeline failure. | True
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| What is the maximum capacity of oxygen in liters? | 660L
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| What is the service pressure of oxygen? | 2000psi
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| How much pressure should be in a cylinder of oxygen to be considered adequate? | 1000psi
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| If you have a service pressure of 1000psi in a cylinder of oxygen, how many liters of oxygen are available? | 330L
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| What should an anesthesia provider do in the event of loss of pipeline pressure? | 1. Fully open up the E cylinder
2. Disconnect the pipeline
3. Consider using low fresh gas flow as to not deplete your cylinder too quickly
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| Why might the flow of oxygen end before a cylinder is completely empty? | If the E cylinder is not fully open
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| Where are hoses to the pipeline disconnected from? | Quick Connection Fitting
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| True/False - As oxygen is expended from a cylinder, the cylinder pressure falls with its content | True
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| In an E cylinder of nitrous oxide, what is the capacity in liters? | 1600L
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| What is the working pressure of a cylinder of nitrous oxide? | 745mmHg
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| Nitrous oxide is stored as a what? | A liquid
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| What is the critical temperature of nitrous oxide? | 36.5 degrees C (above room temp)
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| How is nitrous oxide achieved? | By the process of thermal decomposition of ammonium nitrate
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| Nitrous oxide is stored in what type of cylinder? | Large H cylinder
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| True/False - Bulk storage of nitrous oxide is NOT available. | False - bulk storage of nitrous oxide is available
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| True/false - Nitrous oxide is easily compressed without a large increase in tank pressure | True
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| What is a rupture disc? | All gas cylinders are equipped with a ruptured disc which is an emergency pressure relief valve which prevents explosion under conditions of high pressure?
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| What is a condition that might result in high pressure of an E cylinder? | Overfilling
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| At what PSI will the pressure relief valve rupture? | 3300psi
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| E cylinders can withstand up to how much pressure? | 5000psi
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| What is a low temperature metal located between the valve block and the cylinder body and melts at a low temperature of 158 degees F? | Wood's Metal
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| What is the purpose of Woods Metal? | Allows the contents in the cylinder to escape in a controlled fashion, lessening the risk of explosion.
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| Define a small burst disc. | A small metal gasket engineered to rupture at a pre-determined pressure
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| True/False - Some burst discs are backed with a low melting point and the valve must be exposed to excessive heat before the disc can rupture. | True
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| True/False - The volume remainging in the nitrous oxide cylinder is proportional to the cylinder pressure | False - The volume remaining in the nitrous cylinder is not proportional to the cylinder pressure. The pressure will remain at 745psi till approximately 400L are left in the tank.
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| When should a nitrous oxide tank be changed? | When the tank pressure falls below 745psi
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| What does a nitrous oxide cylinder reading higher than 745psi imply? | 1. Gauge Malfunction 2. Overfilling 3. A gas other than nitrous oxide was mistakenly filled
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| What is your action as an anesthesia provider if you have a nitrous tank with a service pressure reading higher than 745psi? | Take the tank out of service
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| When energy is consumed in the conversion of liquid to gas, what is this phenomenon called? | Latent Heat Vaporization
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| What is nitrous oxide stored as? | A liquid at room temperature
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| What happens when you are running 4L/min or greater of nitrous oxide? | Rapid removal of nitrous oxide from a cylinder can cause the formationof frost on its walls or feeze the valve because of the loss of latent heat of vaporization from the liquid nitrous oxide.
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| Liquid oxygen must be stored at or below what temperature? | -119 degrees C
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| What is the meaning of "tare weight" and where can it be found? | Tare weight means empty and can be found on the shoulder of the cylinder
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| What is the tare weight of an E cylinder? | 9.8lbs
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| Describe the proper way to "crack" a cylinder | Open the valve to release some gas
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| What is the purpose of cracking a cylinder? | To remove debris/particles that could possibly interfere with flow
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| What color is the nitrous tank? | Blue
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| What color is the oxygen tank? | Green
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| What is the only reliable way to determine the residual volume of a nitrous oxide cylinder? | To weigh the tank
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| When will a cylinder of nitrous begin to lose its pressure? | When approximately 400L remain
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| What color is medical air? | Yellow
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| How is medical air obtained? | By blending oxygen and nitrogen together or it can be provided by air compressors
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| What is the critical temperature of air? | -140.6 degrees C
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| True/False - Medical gas is stored as a gas in cylinders whose pressures fall in proportion to the tank content | True
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| What 2 items help to provide the filtered but unsterile air to the anesthesia system? | In-line filters and water traps
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| How many liters can an H cylinder hold? | 7000L
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| What are the major constituents of compressed air? | 1. Nitrogen-78% 2. Oxygen-21% 3. Argon-1%
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| What does the pneumonic WAGD stand for? | Waste, Anesthesia, Gas, Disposal
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| What does DISS stand for? | Diameter Index Safety System
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| What is the purpose of DISS? | Makes cross connection more difficult by using different size and shape connectors for N2O and O2. This makes cross connection difficult but not impossible.
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| What does PISS stand for? | Pin Index Safety System
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| What is the purpose of PISS? | Another means of preventing misconnection. pin arrangement matches holes in the yoke, where the cylinder attaches to the machine
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| What are the PISS numbers for Air? | 1 and 5
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| What are the PISS numbers for oxygen? | 2 and 5
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| What are the PISS numbers for Nitrous oxide? | 3 and 5
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| What are the PISS numbers for CO2? | 1 and 6
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| What are the PISS numbers for Helium? | No pins for Helium
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| What provides for uninterrupted gas supply to the OR? | Auto Switching Manifolds
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| What is another term for emergency shut off valves? | Zone Valves
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| Where are zone valves located? | Outside of the OR's
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| True/False - Compressed Nitrogen is administered to patients | False - Compressed Nitrogen is used to power OR equipment
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| What kind of cylinder is compressed nitrogen stored in? | H cylinders and they are wheeled around on a dolly
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| True/False - Nitrogen tanks are generally regulator controlled | True
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| What is compressed carbon dioxide used for in the OR? | Insufflation of the abdomen during laparoscopic procedures
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| What is the insufflation pressure of the abdomen? | 15
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| What color tank is the insufflation gas carbon dioxide? | Gray
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| What 2 items should be checked to ensure the proper gas for the proer application? | Label and PISS
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| Who recommends color coding? | CGA (Compressed Gas Association)
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| True/False - Color coding is mandatory | False - Color coding is not mandatory. It is recommended but not all manufacturers follow the recommendation
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| Who published the standards on professional qualifications for inspectors and verifiers of medical gas systems? | The AmericanSociety of Sanitary and Engineering (ASSE)
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| True/False - Anesthesia providers have and obligation to ensure the system is properly designed and functioning and should participate in the final inspection process | True
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| True/False - Most problems with cross connections occur due to human error | False - Most problems with cross connections occur with new systems or following repairs
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| What are gas pipes constructed of? | Seamless copper tubing
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| What is avoided at all costs in terms of the pipeline? | Internal contamination with oils, dust, and water
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| Anesthesia equipment interface with the pipeline systems how? | By color coded hoses
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| True/False - Quick connect couplers are noted on the wall and the DISS fittings that help prevent connection errors are found on the anesthesia machine | True
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| What are 4 ways to test the anesthesia gas circuits prior to patient use? | 1. Pressure Test 2. Test for Cross Connections 3. Pipeline Purge Test using a cheesecloth 4. Standing Pressure Test after the wall are close up
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| In accordance with the ASSE 6000 requirements, what is another name for the tests? | System Verification Tests
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| True/FAlse - Each gas outlet is tested individually to ensure it is connected to the proper source | True
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| What is generally used to blow the pipeline free of debris? | Humidity and contaminate free nitrogen
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| What is the purpose of the pressure test? | Increase the pressure for 48 hours while monitoring for leaks
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