Everything You Need to Know About Oxygen Flow Rates, Types, and What They Mean for Your Health

If you or a loved one is starting oxygen therapy, you may have heard the term “flow setting” from your doctor or equipment provider. But what does it really mean, and how do you know if yours is correct?

At 1st Class Medical, our goal is to make oxygen therapy easy to understand and use. This guide will cover the basics of oxygen flow settings, including:

• What oxygen flow rate is and how it’s measured
• The difference between pulse dose and continuous flow
• How flow settings affect your oxygen therapy
• How to avoid common mistakes

By the end, you’ll understand how flow settings work and how to manage your oxygen therapy with more confidence.

What Is an Oxygen Flow Setting?

In the simplest terms, your oxygen flow setting determines how much oxygen you receive from your oxygen concentrator or tank.

Flow settings are based on your oxygen prescription, which is usually measured in liters per minute (LPM) for continuous flow, or milliliters per breath for pulse dose. Your healthcare provider determines this based on your oxygen saturation levels and how your body responds during rest, activity, and sleep.

Continuous Flow vs. Pulse Dose: What’s the Difference?

Oxygen concentrators can deliver oxygen in different ways. Knowing which type you have helps you understand your flow setting.

1. Continuous Flow

This type of delivery provides a steady stream of oxygen, regardless of when or how you breathe.

• Measured in Liters Per Minute (LPM)
• Common flow settings: 1 to 5 LPM (some go higher)
• Often used for:
  • Sleep
  • More advanced respiratory conditions
  • Home oxygen therapy

2. Pulse Dose

Also known as “on-demand” oxygen, pulse dose concentrators deliver oxygen only when you inhale. The device senses your breath and releases a burst of oxygen.

• Measured in Settings (e.g., Settings 1 to 6)
• Each manufacturer’s settings vary in how much oxygen they deliver per breath
• Commonly used for:
  • Mobility
  • Daytime use
  • Active users

Keep in mind, a setting of “2” on one pulse dose concentrator might not give you the same amount of oxygen as a “2” on another brand. Always check the actual oxygen output in milliliters per breath when comparing devices.

How Is Your Flow Rate Determined?

Your flow rate is typically determined through:

• Arterial Blood Gas (ABG) Test: Measures oxygen and carbon dioxide levels in your blood.
• Pulse Oximetry: Measures your blood oxygen saturation (SpO2) using a finger sensor.
• 6-Minute Walk Test: Assesses how well your oxygen levels hold up during physical activity.

Based on your test results, your doctor will prescribe:

• A specific flow setting (e.g., 2 LPM or Setting 3)
• The type of delivery system (pulse vs. continuous)
• Instructions for different conditions (rest, exertion, sleep)

Do not change your flow rate unless your doctor tells you to. Getting too little oxygen can cause low oxygen levels, while too much can be harmful, especially if you have COPD.

What Do the Flow Settings Actually Mean?

Now, let’s look at what the numbers on your oxygen concentrator or tank mean.

Continuous Flow (Liters Per Minute)

Pulse Dose (Settings per Breath)

* These numbers vary significantly depending on brand and model. Always consult the user manual or technical specifications.

Why You Shouldn’t Change Flow Settings Without a Doctor’s Approval

It may feel like a good idea to turn up your flow when you’re short of breath, but changing your oxygen level on your own can be risky. This is why:

1. Over-Oxygenation: High levels of oxygen can reduce your respiratory drive, especially in COPD patients.
2. Misdiagnosed Symptoms: Shortness of breath can be caused by other factors, including anxiety or fluid buildup.
3. Ineffective Use: A higher setting may not actually help if your device doesn’t match your oxygen delivery needs.

If your current settings don’t seem to be helping, reach out to your doctor or respiratory therapist. You might need a new test or a different device.

Understanding Oxygen Conserving Devices (OCDs)

Some oxygen tanks use oxygen-conserving devices that work like pulse dose delivery and help your tank last longer. These have flow settings too, but they do not match continuous liters per minute.

Always verify what type of device you’re using and follow the correct settings as prescribed.

Common Oxygen Therapy Mistakes to Avoid

Whether you’re new to oxygen therapy or have been using it for years, avoid these common flow-setting mistakes:

• Assuming flow settings are interchangeable across machines
• Increasing flow without a prescription
• Using a pulse dose device during sleep without proper testing
• Not replacing cannulas or tubing regularly, which affects delivery
• Failing to check battery levels or flow indicator lights

Oxygen therapy works best when you know how to use it correctly.

Pulse Unit Examples:

Pulse oxygen concentrators deliver oxygen in bursts, or “pulses,” only when the user inhales. This makes them lightweight, energy-efficient, and ideal for active users who need mobility and portability.

• ARYA Airtivo Max
• ARYA Mini
• ARYA Q

Continuous Unit Examples:

Continuous oxygen concentrators provide a steady flow of oxygen regardless of the user’s breathing pattern, making them reliable for individuals who need constant support.

• Oxlife Independence
• Oxlife Liberty 2
• SeQual Eclipse 5

How 1st Class Medical Can Help

At 1st Class Medical, we specialize in helping oxygen users understand their therapy, choose the right equipment, and feel confident using it every day. We offer:

• A wide selection of pulse dose and continuous flow concentrators
• Devices with customizable flow settings for different needs
• Expert guidance from licensed oxygen specialists
• Technical support and training to help you use your device properly

Whether you have COPD, pulmonary fibrosis, or are recovering from surgery, we are here to help you get the oxygen and independence you need.

Final Thoughts: Oxygen Settings Made Simple

Your flow setting is more than just a number. Knowing how your oxygen therapy works can help you live better, breathe easier, and stay active.

To recap:

• Flow settings are tailored to your specific oxygen needs
• Continuous flow delivers a steady stream; pulse dose is breath-triggered
• Settings are not interchangeable across devices
• Always follow your prescription and speak to your doctor before making changes

If you are not sure your current device or flow setting is right for you, 1st Class Medical can help. We are committed to helping you breathe easier.

Need help choosing a device with the right flow settings?

Call us today at 800-520-5726 or visit www.1stclassmedical.com to speak with a licensed specialist.