The Top 5 Questions Patients Ask About Home Oxygen Therapy
- Matthew Hellyar
- 2 hours ago
- 9 min read
Being prescribed home oxygen therapy can bring relief, but it can also bring uncertainty.
Patients and families are suddenly introduced to oxygen concentrators, cylinders, nasal cannulas, flow rates, pulse oximeters, backup plans, and new safety rules. Even when the equipment has been explained, it is normal to arrive home and realise that there are still questions.
Why do I need oxygen if I do not always feel breathless?
Can I turn the flow rate up when I am struggling?
Will I need oxygen forever?
Can I still leave the house?
What happens if the electricity goes off?
These are not small questions. They affect a patient’s safety, confidence, independence, and ability to adjust to life with oxygen.
At Respocare, we believe that supplying oxygen equipment is only one part of the service. Patients should also understand why their therapy has been prescribed, how to use it correctly, and how the different parts of their oxygen plan work together.
Here are five of the questions patients ask most often about home oxygen therapy.
1. Why have I been prescribed home oxygen?
Home oxygen therapy is generally prescribed when testing shows that there is not enough oxygen in the blood.
This is called hypoxaemia.
A patient can sometimes have low blood oxygen without feeling dramatically breathless. Breathlessness is a personal sensation, while blood oxygen is a clinical measurement. This means feeling “fine” does not always prove that the body is receiving enough oxygen.
Doctors may assess oxygen levels using:
A pulse oximeter placed on the finger
An arterial blood gas test
Resting oxygen measurements
A walking or exercise test
Overnight oxygen monitoring
A broader assessment of the patient’s respiratory condition
Home oxygen may be considered in conditions such as chronic obstructive pulmonary disease, pulmonary fibrosis, pulmonary hypertension, cystic fibrosis, severe chronic respiratory disease, and certain heart or breathing conditions.
The reason for prescribing oxygen is not simply to make air feel easier to breathe. It is to correct low blood oxygen and reduce the strain that inadequate oxygen can place on the body.
For some patients with severe chronic resting hypoxaemia, long-term oxygen therapy has established clinical benefits when used for the prescribed number of hours. For other patients, oxygen may only be required during activity, sleep, recovery from an illness, or a specific stage of treatment.
Every prescription is individual.
Does oxygen treat breathlessness?
Oxygen treats low oxygen levels. It is not automatically the correct treatment for every episode of breathlessness.
A person can feel breathless because of infection, anxiety, airway narrowing, fluid retention, physical deconditioning, heart problems, or progression of an underlying condition. Increasing oxygen may not address the cause.
New, severe, or rapidly worsening breathlessness should therefore not be managed by simply turning up the oxygen. The patient should follow their medical plan and seek professional advice when symptoms change.
2. How many hours a day should I use my oxygen?
The correct answer is the number of hours written in the patient’s prescription.
Some people only need oxygen:
While walking or exercising
During sleep
During recovery from an acute illness
At certain times of the day
When travelling or attending appointments
Other patients with long-term oxygen therapy may be instructed to use oxygen for at least 15 hours per day or, in some cases, almost continuously.
The number of hours matters. A patient who has been prescribed long-term oxygen should not regularly remove it simply because they feel well at that moment. Blood oxygen can still be low even when symptoms are not obvious.
Oxygen may also be prescribed at different settings for different activities. A patient’s resting requirement may not be the same as their requirement during walking or sleep.
The prescription should ideally make clear:
The prescribed flow rate
How many hours oxygen should be used
Whether it is needed at rest
Whether it is needed during exertion
Whether it is required during sleep
Which delivery device should be used
The target oxygen saturation range, where applicable
Will I need oxygen forever?
Not necessarily.
Some patients require oxygen temporarily during or after an illness. If the underlying condition improves and oxygen levels recover, the medical team may reduce or stop the therapy after reassessment.
Other patients have a long-term condition that causes persistent low blood oxygen and may need ongoing treatment.
Patients should never stop oxygen, reduce the hours, or decide that they no longer need it without being reassessed by their doctor or respiratory specialist.
Needing oxygen is not a sign that a patient has failed. It is a prescribed treatment designed to give the body the oxygen it is unable to obtain adequately from room air.
3. Can I change my oxygen flow rate when I feel breathless?
Patients should not independently change their prescribed oxygen flow rate unless their doctor has given them a specific written plan explaining when and how to do so.
The flow rate is the amount of oxygen delivered each minute. It is commonly written in litres per minute, or L/min.
It can be tempting to turn the oxygen up when breathing feels difficult. However, more oxygen is not always better.
Too little oxygen may fail to correct hypoxaemia. Too much oxygen can also be harmful, particularly for some patients who are at risk of retaining carbon dioxide.
The prescribed setting has been selected for a reason.
Patients should understand that:
Breathlessness does not always mean that oxygen is low.
A pulse oximeter reading must be interpreted in the context of the patient’s medical plan.
Portable concentrator settings may not equal continuous-flow litres per minute.
Flow requirements may differ between rest, exertion, and sleep.
A sustained change in oxygen needs should be medically assessed.
What should I do if my saturation is lower than usual?
First check the simple practical factors:
Is the concentrator switched on and plugged in?
Is the cylinder open?
Is there enough oxygen left in the cylinder?
Is the tubing properly connected?
Is the tubing kinked, trapped, or damaged?
Is the nasal cannula positioned correctly?
Is the device set to the prescribed rate?
If the equipment appears to be working but the patient remains below the target provided by their healthcare professional, or develops worsening symptoms, the patient should follow their emergency or escalation plan.
Sudden severe breathlessness, chest pain, blue or grey lips, confusion, collapse, or marked drowsiness requires urgent medical attention.
4. Is home oxygen safe?
Home oxygen can be used safely when patients and families follow the correct precautions.
Oxygen itself does not usually ignite on its own, but it supports combustion. This means that materials can catch fire more easily and burn faster and more intensely in an oxygen-enriched environment.
The most important rule is that nobody should smoke or vape near oxygen equipment.
Oxygen should also be kept away from:
Open flames
Candles
Gas stoves
Fireplaces
Heaters
Sparking equipment
Flammable aerosols and liquids
Oil- or petroleum-based products
Patients should use water-based products for dry lips or skin when advised, rather than petroleum jelly near oxygen equipment.
Cylinders should be stored securely and according to supplier instructions. They should not be allowed to fall, roll freely, or remain unsecured in a vehicle.
Tubing should be arranged carefully because it can become a trip hazard. Patients and families should regularly check that tubing is not kinked, damaged, trapped beneath furniture, or stretched across busy walking areas.
Smoke alarms should be working, and everyone in the home should understand the oxygen safety plan.
Can I cook while using oxygen?
Cooking arrangements should be discussed with the oxygen provider or clinical team, especially where gas flames are used.
Oxygen equipment must be kept well away from naked flames and heat sources. Patients should not position the cannula, tubing, concentrator, or cylinder near a gas stove or open fire.
The safest approach depends on the home environment, cooking equipment, prescribed usage, and the patient’s ability to move safely without oxygen. A personalised safety plan is better than guessing.
5. Can I leave the house, travel, and manage a power failure?
For many patients, the answer is yes—but it requires planning and the correct equipment.
Home oxygen therapy does not necessarily mean remaining in one room or never leaving home.
Portable oxygen may help suitable patients:
Attend medical appointments
Visit family
Go shopping
Spend time outdoors
Maintain daily routines
Travel short distances
Participate more confidently in life
Portable options can include lightweight oxygen cylinders or portable oxygen concentrators. The correct option depends on the prescription, required flow, length of use, battery capacity, and whether the patient needs continuous flow or can use pulse-dose oxygen.
A portable concentrator’s numbered setting should not automatically be treated as equivalent to the same number of litres per minute from a continuous-flow system. Devices deliver oxygen differently, and not every portable machine can meet every patient’s needs.
Patients who require higher flows may need cylinders or another solution rather than a small portable concentrator.
What should I do during a power failure?
Stationary oxygen concentrators require electricity. Every patient who relies on one should know what to do if the power supply fails.
A practical backup plan may include:
A filled backup oxygen cylinder
Knowing the prescribed cylinder flow setting
Knowing how to open and operate the cylinder
Keeping the cylinder somewhere accessible
Checking that it remains adequately filled
Having the oxygen provider’s contact information available
Keeping a torch nearby
Planning for longer power interruptions
Charging portable concentrator batteries in advance, where applicable
South African patients should consider loadshedding and unexpected outages as part of routine oxygen planning, not only as emergencies.
The amount of time a cylinder lasts depends on the cylinder size, pressure, and prescribed flow rate. Patients should ask their oxygen provider for an estimated duration based on their specific setup.
Can I travel with oxygen?
Travel is often possible, but it should be arranged in advance.
Different transport providers have different rules. Airlines may only allow approved portable oxygen concentrators and may require medical documentation, advance notice, and sufficient battery capacity.
When travelling by car, oxygen equipment should be upright, secure, ventilated, protected from heat, and kept away from smoking or flames. It should never be left unsecured or stored in a dangerously hot vehicle.
Patients should discuss longer journeys with their doctor and oxygen provider before travelling.
Understanding the different types of home oxygen equipment
A complete home oxygen plan may include more than one device.
Stationary oxygen concentrator
A stationary concentrator draws in room air, removes much of the nitrogen, and delivers concentrated oxygen to the patient.
It is commonly used as the main home system for patients who require oxygen for many hours each day. It needs electricity and should be supported by a backup plan.
Portable oxygen concentrator
A portable oxygen concentrator is designed to provide oxygen away from the main home unit.
Many portable machines deliver pulse-dose oxygen rather than continuous flow. Suitability depends on the patient’s prescription, breathing pattern, oxygen requirements, and activity.
Battery life and charging arrangements must be considered before leaving home.
Oxygen cylinder
An oxygen cylinder contains compressed medical oxygen.
Cylinders may be used for backup during a power failure, for transport, for mobility, or where a particular flow requirement cannot be met by a portable concentrator.
Because a cylinder contains a finite supply, patients need to understand how long it is expected to last at their prescribed flow.
Questions every oxygen patient should be able to answer
Before relying on home oxygen, a patient or caregiver should know:
Why has the oxygen been prescribed?
What is the correct flow rate?
How many hours per day should it be used?
Is the prescription different for rest, walking, and sleep?
What target saturation has the doctor provided?
Which equipment should be used in each situation?
What is the backup plan for a power failure?
Who should be contacted if the equipment fails?
What symptoms require medical advice?
What symptoms require urgent emergency care?
If any of these answers are unclear, the patient should contact their oxygen provider or healthcare professional.
Respocare’s approach to home oxygen therapy
At Respocare, we do not believe an oxygen service ends when a machine or cylinder arrives at the patient’s home.
Delivery and setup are clinical moments.
Patients and families need reliable equipment, but they also need education, reassurance, practical planning, and access to people who understand oxygen therapy.
Our role includes supporting patients with:
Stationary oxygen concentrators
Portable oxygen solutions
Medical oxygen cylinders
Backup oxygen planning
Equipment setup and education
Flow-rate awareness
Practical home oxygen guidance
Ongoing service and support
When a specialist trusts Respocare with an oxygen patient, that patient becomes part of our care journey too.
We are there for more than the delivery. We are there for the full arc of the patient’s oxygen therapy.
The most important answer
The five questions in this guide all lead back to one principle:
Oxygen is prescribed medical therapy.
It should be used at the prescribed flow, for the prescribed duration, with the correct equipment and a proper safety plan.
Patients should never feel embarrassed about asking questions. Understanding oxygen therapy is part of using it safely—and good patient education is part of good healthcare.
Respocare is dedicated to helping oxygen patients breathe with greater safety, confidence, and freedom.
Respocare. Enhancing life with every breath.
Medical disclaimer
This article provides general patient education and does not replace advice from a doctor, respiratory specialist, or qualified healthcare professional. Oxygen should only be used as prescribed. Do not start, stop, or change your oxygen flow rate without medical guidance. Seek urgent medical attention for severe or rapidly worsening symptoms.
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