Test 1 ch 3

Questions and Answers

What does the marking 'DOT 3AA' on a medical gas cylinder indicate?

The cylinder has a filling pressure of 3000 psi.

The cylinder meets specific D.O.T. standards. (correct)

The cylinder is made of aluminum.

The cylinder is only for liquid gas storage.

How often must safety tests occur for medical gas cylinders according to regulations?

Every 15 years.

Every year.

Every 5 to 10 years. (correct)

Every 20 years.

What does the star symbol next to the test date on a cylinder signify?

The cylinder was manufactured in the last 2 years.

The cylinder is approved for 10-year testing. (correct)

The cylinder can be filled 20% above service pressure.

The cylinder is approved for 5-year testing.

What is the significance of the marking 'EE' followed by a number on a cylinder?

It shows the cylinder's elastic expansion under test conditions. Signup and view all the answers

What determines the amount of gas in a compressed gas cylinder?

The pressure within the cylinder. Signup and view all the answers

Which cylinder sizes are classified as small cylinders in a medical setting?

Sizes E through AA. Signup and view all the answers

What is the pressure equivalent when a cylinder is half full if it is full at 2200 psig?

1100 psig. Signup and view all the answers

What material are medical gas cylinders generally constructed of?

Seamless steel. Signup and view all the answers

What level of precautions should a respiratory therapist observe when treating a patient with well-controlled asthma?

Standard Signup and view all the answers

When entering the room of a patient with MRSA, what personal protective equipment should the respiratory therapist put on first?

Gown Signup and view all the answers

To avoid airborne transmission of measles, where should a 10-year-old patient be placed?

In an airborne infection isolation room Signup and view all the answers

What is the volume of 1 cubic foot of liquid oxygen in terms of gas volume?

860 cubic feet Signup and view all the answers

What is the primary function of the safety system designed by the Compressed Gas Association?

To prevent the interchange of cylinders containing different gases Signup and view all the answers

Which of the following is NOT a common route of disease transmission?

Walking and talking Signup and view all the answers

What must liquid oxygen be stored below to remain in liquid form?

-181.1 F Signup and view all the answers

The specific positions for the holes drilled in the Pin-Index Safety System (PISS) cylinder valve support which purpose?

To ensure compatibility with certain equipment Signup and view all the answers

Which safety system uses a yoke connection for equipment attachment?

Pin-Index Safety System (PISS) Signup and view all the answers

Which type of cylinder valve is designed to prevent pressure loss in medical gas cylinders?

Direct-acting valve Signup and view all the answers

For what type of pressure connections and fittings was the Diameter Index Safety System (DISS) designed?

Low-pressure connections (0 - 200 psig) Signup and view all the answers

How are medical gas cylinders constructed according to regulations?

Regulations established by the Department of Transportation Signup and view all the answers

Which device allows for the escape of vaporized liquid oxygen in case of excess pressure?

Safety vent Signup and view all the answers

What feature differentiates large medical gas cylinders from small cylinders regarding safety systems?

Different thread sizes and pitches for connections Signup and view all the answers

What is used to accurately determine the contents of a liquid-filled cylinder?

Cylinder weight Signup and view all the answers

What can mishandling of medical gas systems lead to?

Potentially lethal situations Signup and view all the answers

Airborne transmission occurs by the spread of evaporated droplet nuclei smaller than what size?

5 µm Signup and view all the answers

What should be done while transporting a cylinder and cart?

Keep one hand on the safety cap and the other on the cart handle. Signup and view all the answers

What mechanism is a fusible plug classified as?

Thermal sensitive mechanism Signup and view all the answers

What is the role of the protective cap on large medical gas cylinders?

To cover the cylinder valve and prevent contamination Signup and view all the answers

What does the acronym ASSS stand for?

American Standard Safety System Signup and view all the answers

At what pressure is liquid oxygen typically stored in large storage tanks?

250 psig Signup and view all the answers

The Diameter Index Safety System (DISS) specifically utilizes what type of outlet connection?

A diameter-threaded male outlet Signup and view all the answers

What is the gas configuration designation for oxygen and air?

Oxygen - Green, Air - Yellow Signup and view all the answers

What must be done before attaching any equipment to a gas cylinder?

Crack the cylinder valve Signup and view all the answers

What weight does a full oxygen 'H' cylinder approximately have?

126 pounds Signup and view all the answers

Which statement about the handling of medical gas cylinders is correct?

Chains or straps should be used to secure them to the wall. Signup and view all the answers

What is the primary purpose of high-pressure relief valves in gas cylinders?

To prevent cylinder rupture due to overpressure Signup and view all the answers

Why is it essential to ensure that oil or dust is cleared from gas delivery systems before pressurization?

To avoid ignition due to adiabatic compression. Signup and view all the answers

What noise is produced when a cylinder is cracked?

A loud hissing noise Signup and view all the answers

What precaution should be taken when cracking a cylinder valve?

Give warning of 'Cracking' and wear safety goggles. Signup and view all the answers

Study Notes

Infection Control Precautions

Respiratory therapists should observe standard precautions when treating patients with well-controlled asthma.
Prior to entering the room of a patient with MRSA, the therapist must put on gown first.
A patient with measles should be placed in an airborne infection isolation room to prevent transmission.
According to the CDC, ventilator circuits should be changed based on visual or known contamination.
Common routes of disease transmission include: droplet, airborne, vehicle, and vector; walking and talking is not a common route.
Airborne transmission occurs through droplet nuclei smaller than 5 µm.

Medical Gas Supply Systems

Medical gas supply systems include cylinders, piping systems, liquid systems, and oxygen concentrators.
Proper utilization of these systems is essential for patient safety; mishandling can lead to serious risks.

Medical Gas Cylinders

Medical gas cylinders are constructed to meet Department of Transportation (D.O.T.) regulations.
Cylinders are made from seamless steel and need to undergo a safety test every 5 to 10 years.
Markings denoting compliance include "DOT 3AA," normal filling pressure, and details of the safety test.

Cylinder Sizes and Properties

The two most common cylinder sizes are E and H; sizes E through AA are small cylinders, while G and above are large.
Gas volume is directly proportional to its pressure; the weight of O2 in an E cylinder is 2 lbs and 20 lbs in an H cylinder at full pressure.

Liquid Gas Systems

Liquid oxygen systems can store large quantities due to the conversion of 1 cubic foot of liquid oxygen to 860 cubic feet of gas.
Liquid oxygen must be kept below -181.1°F to ensure it remains in liquid form.

Cylinder Valves and Safety Systems

Cylinder valves regulate gas pressure and provide a connection point for equipment.
High-pressure relief valves are incorporated in cylinders to prevent ruptures; designs include frangible disk, fusible plug, and spring-loaded.
Fusible plugs melt at elevated temperatures to release pressure safely.

Safety and Labeling Systems

To avoid administering the wrong gas, careful reading of cylinder and outlet labels is vital.
There are established safety systems:
- American Safety Standard System (ASSS) for large cylinders with different thread standards.
- Pin-Index Safety System (PISS) for small cylinders, ensuring proper connections.
- Diameter-Index Safety System (DISS) for low-pressure connections that prevent gas misapplication.

Handling and Transportation

Large gas cylinders should be securely stored with chains or straps to prevent falls.
Use proper techniques for maneuvering large cylinders due to their weight, which can be hazardous if mishandled.
Before attaching equipment, cylinders must be cracked to remove impurities, which creates a loud hissing noise; safety precautions such as wearing goggles and providing warnings should be observed.

Additional Safety Protocols

Ensure all delivery systems are free of oil or dust to prevent ignition during pressurization due to adiabatic compression.

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Description

This quiz focuses on the storage and distribution of medical gases as outlined in Hess Chapter 13, along with critical infection control measures. Participants will test their knowledge on proper precautions and personal protective equipment needed when treating patients with specific conditions. It's an essential resource for respiratory therapists to ensure safety and compliance.