What’s the Difference between Pulse Dose & Continuous Flow?

Understanding Pulse and Continuous Flow Oxygen Concentrators

When you’re first prescribed oxygen therapy, you’ll likely discuss the different options available with your doctor to find the best solution for your needs. One of the first considerations will be whether you require a pulse dose or a continuous-flow oxygen unit. You may have heard these terms before, but do you truly understand what they mean? How do they relate to oxygen concentrator settings? What’s the difference between them, and which one is right for you? Let's explore the key differences below.

Litres Per Minute & Flow Rate

Many patients assume that seeing "litres per minute" (LPM) on their prescription means they must use a continuous-flow oxygen concentrator or cylinder. However, both pulse and continuous-flow units operate with LPM. This measurement refers to the flow rate of oxygen you are prescribed, determining how much oxygen is delivered through your nasal cannula.

It’s essential to note that your prescription may not specify whether you need a pulse-dose portable oxygen concentrator or a continuous flow device. Additionally, LPM does not directly correspond to pulse-dose settings on portable oxygen concentrators UK. Most home or continuous-flow units have exact LPM settings, whereas portable oxygen concentrator machines feature settings typically ranging from 1 to 9.

Pulse-Flow Oxygen Concentrators

A pulse flow portable oxygen concentrator delivers oxygen in bursts when you inhale. This method ensures oxygen is only released during inhalation while being stored during exhalation. If your breathing rate increases, the portable concentrator oxygen machine adjusts the pulse size and delivery frequency to maintain the required oxygen flow.

Think of it like drinking from a straw—oxygen delivery is controlled and efficient. In contrast, continuous flow is like drinking from a water fountain, where oxygen is always available. Because of its efficiency, a portable oxygen concentrator extends battery life, making it an excellent oxygen concentrator for travel. Additionally, pulse dose units are generally more compact and lightweight, providing greater mobility.

Is Pulse-Flow Oxygen Right for Me?

Your doctor will help determine if a pulse-dose portable oxygen concentrator machine is a viable option. While it works well for many, some medical conditions necessitate a continuous-flow portable oxygen concentrator. For instance, if you require oxygen at night, a continuous flow unit is often recommended, as some patients may not inhale deeply enough during sleep to trigger a pulse device. If a pulse sensor isn’t activated, the machine may alarm, disrupting sleep.

A portable oxygen concentrator for travel is an excellent option for those with active lifestyles. If you enjoy exercising, travelling, or daily outings, a pulse-dose portable oxygen concentrator can adjust to your changing breath rates, ensuring you receive the required oxygen therapy.

Pulse Dose Machines Available at The Oxygen Store:

  • CAIRE Freestyle Comfort

  • Drive DeVilbiss iGo2

  • Inogen One Rove 6, G5, G4, G3 

  • AirSep FreeStyle 5

Continuous-Flow Oxygen Concentrators

Continuous flow devices provide a steady stream of oxygen at a predetermined rate, much like a running water fountain. This delivery method ensures a constant supply of oxygen, but it can lead to some oxygen wastage if not fully inhaled.

All home-based or stationary oxygen concentrators operate on continuous flow, as do traditional oxygen cylinders.

Is Continuous Flow Right for Me?

As with pulse flow, your doctor will determine whether a continuous-flow is necessary. It’s often the preferred choice for individuals with lower activity levels, consistent breathing rates, or those requiring oxygen during sleep. Additionally, all continuous-flow oxygen concentrator models are compatible with humidifier bottles to reduce dryness in the nasal passages, making them ideal for higher oxygen flows.

Continuous-Flow Only Machines Available at The Oxygen Store:

  • Airsep Visionaire 5

  • Inogen At Home

  • Airsep Intensity 10

  • Invacare Perfecto 2V, Platinum 10

Pulse and Continuous Flow Oxygen Concentrators

Why choose one when you can have both? Some portable oxygen concentrators offer both pulse and continuous flow, making them highly versatile. These machines are excellent for travelling with a portable oxygen concentrator and nocturnal use, while allowing for extended battery life during the day with pulse-dose mode.

Pulse & Continuous Flow Machines Available at The Oxygen Store:

  • Sequal Eclipse 5

  • GCE Zen-O

Choosing the Right Oxygen Delivery System

Selecting the right portable oxygen concentrator depends on your lifestyle and medical requirements. Some key questions to consider include:

  • Do I need continuous flow for nighttime use?

  • What is my prescribed oxygen flow rate?

  • Will I use oxygen while travelling or being active?

  • What is the maximum weight I can comfortably carry?

  • How long of a battery life do I need daily?

At The Oxygen Store, we’re committed to helping you find the perfect portable oxygen concentrator to suit your lifestyle. If you’re unsure which system is right for you, we recommend consulting with your doctor to discuss your specific needs. Visit oxygen-concentrators.com to explore our full range of portable oxygen concentrators today!

 

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