Pulse Oximeters & Oxygen Concentrators: What to Know About At-Home Oxygen Therapy

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illustration of a man seated using a oxygen concentrator & hand with index finger inserted into a pulse oximeter

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To survive, we need oxygen going from our lungs to the cells in our body. Sometimes the amount of oxygen in our blood can fall below normal levels. Asthma, lung cancer, chronic obstructive pulmonary disease (COPD), the flu, & COVID-19 are some of the health issues that may cause oxygen levels to drop. When the levels are too low, we may need to take extra oxygen, known as oxygen therapy.

One way to get extra oxygen into the body is by using an oxygen concentrator. Oxygen concentrators are medical devices required to be sold & used only with a prescription.

You should not to use an oxygen concentrator at home unless it has been prescribed by a health care provider. Giving yourself oxygen without talking to a doctor first may do more harm than good. You may end up taking too much or too little oxygen. Deciding to use an oxygen concentrator without a prescription can lead to serious health problems such as oxygen toxicity caused by receiving too much oxygen. It can also lead to a delay in receiving treatment for serious conditions like COVID-19.

Even though oxygen makes up about 21 percent of the air around us, breathing high concentrations of oxygen may damage your lungs. On the other hand, not getting enough oxygen into the blood, a condition called hypoxia, could damage the heart, brain, & other organs.

Find out if you really need oxygen therapy by checking with your health care provider. If you do, your health care provider can determine how much oxygen you should take & for how long.

What do I need to know about oxygen concentrators?

Oxygen concentrators take in air from the room & filter out nitrogen. The process provides the higher amounts of oxygen needed for oxygen therapy.

Concentrators may be large & stationary or small & portable. Concentrators are different than tanks or other containers supplying oxygen because they use electrical pumps to concentrate the continuous supply of oxygen that comes from the surrounding air.

You may have seen oxygen concentrators for sale online without a prescription. At this time, the FDA has not approved or cleared any oxygen concentrators to be sold or used without a prescription.

When using an oxygen concentrator:

  • Do not use the concentrator, or any oxygen product, near an open flame or while smoking
  • Place the concentrator in an open space to reduce chances of device failure from overheating
  • Do not block any vents on the concentrator since it may impact device performance
  • Periodically check your device for any alarms to make sure you are getting enough oxygen.

If you are prescribed an oxygen concentrator for chronic health problems & have changes in your breathing or oxygen levels, or have symptoms of COVID-19, call your health care provider. Do not make changes to the oxygen levels on your own.

How are my oxygen levels monitored?

Oxygen levels are monitored with a small device called a pulse oximeter, or pulse ox.

Pulse oximeters are placed on a finger, toe or forehead & use beams of light to indirectly measure the level of oxygen in the blood.

What do I need to know about pulse oximeters?

As with any device, there is always a risk of an inaccurate reading. If you are using a pulse oximeter to monitor your oxygen levels & are concerned about the reading, contact a health care provider. & do not rely only on a pulse oximeter. It is important to keep track of your symptoms, or how you feel. Contact a doctor if your symptoms are serious or get worse.

When using a pulse oximeter:

  • Sit still & do not move the part of your body where the pulse oximeter is
  • Do not use the device on your hands when your hands are cold
  • Remove all fingernail polish if using the device on your hands.

If you experienced a problem or injury that you think may be related to a pulse oximeter or oxygen concentrator, you can voluntarily report it through the FDA’s MedWatch program.

Source: FDA Consumer Updates

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