Because breathing better starts with understanding how oxygen therapy works.
Whether you’re new to oxygen therapy or just trying to make sense of the settings on your concentrator, you’re not alone. Oxygen flow can sound more complicated than it really is—but once you understand the basics, it all clicks.
Let’s walk through the essentials:
- What “oxygen flow” actually means
- What LPM stands for
- The difference between pulse and continuous flow
- And how to know which setup is right for you or your loved one
What is Oxygen Flow?
Oxygen flow refers to how much oxygen you receive per minute. It’s usually measured in liters per minute (LPM)—which is just a fancy way of saying how fast oxygen is being delivered to your lungs.
For example:
If your doctor prescribes 2 LPM, that means your device should provide 2 liters of oxygen every minute.
Sounds simple, right? But here’s where it gets a bit more interesting…
Pulse vs. Continuous Flow – What’s the Difference?
Not all oxygen is delivered the same way. There are two main types of flow:
1. Continuous Flow
- Oxygen flows nonstop—even when you’re exhaling.
- Used in home concentrators, hospital settings, and some portable units.
- Best for people who need a steady stream of oxygen, especially while sleeping or using a CPAP.
2. Pulse Dose (Also called Intermittent Flow)
- Oxygen is only delivered when you inhale.
- Used in most portable concentrators to conserve energy and oxygen.
- Great for active users and daytime use.
✅ Pro tip: If you use oxygen at night or need support with a CPAP or BiPAP, you probably need continuous flow.
✅ If you’re out and about during the day, a pulse dose portable concentrator may be all you need.
What Does “Setting 2” Mean?
One of the most common questions we hear is:
“If I set my portable concentrator to 2, is that the same as 2 LPM?”
🛑 Nope!
“Setting 2” on a pulse dose unit is not the same as 2 LPM on a continuous flow unit. On a pulse machine, the setting refers to the size of the oxygen burst, not the total volume per minute.
Each brand is different. So always follow your prescription and consult with your doctor or respiratory therapist if you’re unsure.
Which Oxygen Flow Option is Best for You?
Here’s a quick cheat sheet:
| Your Lifestyle | Best Flow Type | Why It Works |
|---|---|---|
| Homebound or sleeping | Continuous Flow | You need steady oxygen, even when asleep. |
| Active or on-the-go | Pulse Dose | Portable and battery-efficient. |
| Use with CPAP/BiPAP | Continuous Flow | Needed for consistent pressure and delivery. |
| Need high oxygen levels (3+ LPM) | Continuous Flow | Pulse units often can’t meet high demands. |
Still unsure? That’s okay! It’s always best to check with a respiratory therapist or medical equipment specialist—someone who can guide you based on your medical needs and lifestyle.
Need Help Fast?
At Allen Medical Equipment Delivery, we’re here to make your oxygen journey easy. We offer:
✅ 24-hour delivery across North Texas
✅ Both portable and home oxygen concentrators
✅ Friendly support from trained experts
✅ Same-day rentals and insurance-approved purchases