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Doctor insights on: Asthma Oxygen Levels

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My son is 4 and weighs 34lbs he has an upper n lower respiratory infection he also has asthma oxygen level is 91 is that normal?

My son is 4 and weighs 34lbs he has an upper n lower respiratory infection he also has asthma oxygen level is 91 is that normal?

SeekEvaluationToday!: The oxygen saturation of 91% is lower than we like to see generally speaking. Given his history of asthma in addition to his current respiratory infection he really needs to be evaluated either in the pediatrician's office today (or the ED if unable to get appointment). It may be that you just need to increase the frequency of his asthma meds, but only after a thorough evaluation. ...Read more

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Dr. Sue Ferranti
3,000 doctors shared insights

Asthma (Definition)

A disease of the lungs caused by chronic inflammation of the airways most often caused by allergies. This inflammation results in airway swelling and hyperactivity leading to difficulty breathing, shortness of ...Read more


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If you have asthma..Will your oxygen levels be decreased? If it always shows above 98..Most likely you don't have asthma.

If you have asthma..Will your oxygen levels be decreased?  If it always shows above 98..Most likely you don't have asthma.

Not usually: People with asthma usually have normal or near normal oxygen level. But you will be in mortal danger when it is gets below 90. Thus a normal oxygen level by pulse oximetry is not the same as good asthma control. ...Read more

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Could I have asthma with normal oxygen levels and normal chest xray?

Could I have asthma with normal oxygen levels and normal chest xray?

Yes: Yes it is possible; since the (smooth muscle) constriction of the bronchi can not be seen in chest x ray. Most people with asthma have normal oxygen levels most of the time (even during attacks, respiratory rate, heart rate will tend to compensate the hypoxia). ...Read more

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Is it possible to still have asthma with normal oxygen levels and normal chest xray?

Is it possible to still have asthma with normal oxygen levels and normal chest xray?

Yes: If you are not having a flare of your asthma. If flaring, your oxygen level may lower as the flare worsens and your chest x-ray will likely show (if done) hyperexpansion of the lung fields due to air trapping. ...Read more

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What are the symptoms of undiagnosed asthma? I have 100% oxygen levels. Can anxiety trigger an attack?

What are the symptoms of undiagnosed asthma? I have 100% oxygen levels. Can anxiety trigger an attack?

Lots of overlap: Asthma and panic symptoms often have a great deal of similarity including shortness of breath and tightness in one's chest. And for those with asthma, panic can cause an attack prompted by hyperventilation and cascading stress symptoms. Creating a journal of symptom occurence may help your doctor determine whether symptoms are due to asthma or anxiety. ...Read more

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Why would a healthy 24 year old male have an oxygen level of 70%? He does not smoke but does have asthma.

Why would a healthy 24 year old male have an oxygen level of 70%? He does not smoke but does have asthma.

Not possible: If the oxygen level in at 70% (whether pO2 or O2 sat), the person cannot be healthy. Perhaps the problem is with the instrument measuring it. ...Read more

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Can asthma make me exhausted even if my oxygen levels are good?

Can asthma  make me exhausted even if my oxygen levels are good?

Asthma: When asthma is poorly controlled it can increase work of breathing: The person will be working harder to move air in and out because the breathing tubes are narrowed. One way to assess if the asthma is well controlled in to do daily peak flow (There are normative data for your gender and your height). The person will need thorough evaluation for asthma ...Read more

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Today in my nursing lab class I was checking my Oxygen level and my level was 58 the first time and we checked it again it was 84. I don't have asthma?

Pulse ox: Unusually low pulse oximetry levels are usually due to equipment malfunction. These errors can be due to taking measurements with cold fingers, finger nail polish over the nail and sensor, or machine error. True oxygen levels in the ranges you have measured would be accompanied by significant impairment in function and awareness. ...Read more

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Can I have asthma even if I have normal oxygen levels and a normal chest xray?

Can I have asthma even if I have normal oxygen levels and a normal chest xray?

Yes: Asthma most often will not have abnormal chest xray findings and unless very severe episode oxygen levels will be ok as well. ...Read more

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Not sure what a normal range for spo2 are as I just had my oxygen levels checked and it's 94spo2, it was 98/99 few days ago, also had to change to a long lasting steroid inhaler for asthma?

Not sure what a normal range for spo2 are as I just had my oxygen levels checked and it's 94spo2, it was 98/99 few days ago,  also had to change to a long lasting steroid inhaler for asthma?

Can vary: It can vary but it s still in the 90s. If you are having shortness of breath or wheezing the number would be lower also cold fingers can cause a change in the meters ability to detect accurately. ...Read more

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I am on oxygen for asthma and altitude, but my levels are over 90 all day. I use it at night. Can i ever stop? Heart and lung tests were normal. Is it harmful to use if not needed?

I am on oxygen for asthma and altitude, but my levels are over 90 all day.   I use it at night.  Can i ever stop?  Heart and lung tests were normal.  Is it harmful to use if not needed?

Depends: The answer depends on the testing you have had done and the pulmonary dr. Following your case. Some people have good pulse ox reading during the day, but when an overnight pulse ox test is performed they 'desaturate' to low levels that are troublesome, thus oxygen is rx'd for night time use. Check with the prescribing dr. On how your condition is doing, and keep going to follow-up appts.Good luck. ...Read more

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Can one have an asthma attack with a normal peak flow reading equal to 90% or higher along with normal o2/PR level? This seems to be an ongoing issue.

Can one have an asthma attack with a normal peak flow reading equal to 90% or higher along with normal o2/PR level? This seems to be an ongoing issue.

Unlikely asthma: You may probably have VCD, Vocal Cord Dysfunction, a condition that mimics asthma, but peak flow readings would be normal,there are some other subtle clinical differences too. Spirometry with inspiratory curve would be diagnistic / upper airways endoscopy (visualization of the vocal cords), treatment is different, you may want to see your asthma specialist and ENT specialist, good luck ...Read more

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Put on 2 steroids and antibiotic for severe asthma/chronic sinusitis. O2 levels dropped 97 to 79 just walking. Can I drink coffee while on steroids?

Put on 2 steroids and antibiotic for severe asthma/chronic sinusitis. O2 levels dropped 97 to 79 just walking. Can I drink coffee while on steroids?

Uncontrolled severe: Persistent asthma, is what you described, you need more rigorous treatment and follow up, you might need more meds, need to limit your activity for now and avoid all known triggers, steroids can cause gastric inflammation/irritation,you may want to have some gut prophylaxis as well (ranitidine or pantoprazole), please see your doctor again asap and keep close follow up to avoid ER /hospitalization ...Read more

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What should the O2 saturation be for a CO2 level of 33? My mom has COPD, CHF, Asthma, Afib. She has an O2machine at home. Is 5% too high?

What should the O2 saturation be for a CO2 level of 33? My mom has COPD, CHF, Asthma, Afib.  She has an O2machine at home.  Is 5% too high?

Does not compute.: Your mother's situation is complex & I can't make sense of your question since the O2 saturation measures oxyhemoglobin & CO2 measures carbon dioxide pressure. (They can be unrelated). 5% O2 saturation is TOO LOW - not compatible with life - for arterial blood. Do you mean 5 LPM on the O2 tank? Use HealthTap Prime or TTYD to get correct answers, because there's no way to answer using 400 character ...Read more

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Can I ask for oxygen at home for treating the asthma attacks?

Can I ask for oxygen at home for treating the asthma attacks?

No...: Oxygen is a drug and it is only prescribed if your oxygen level is chronically low enough to warrant it. During an asthma exacerbation, if your oxygen level drops, you need to be evaluated in an er because this is a sign of a life-threatening episode that may need more than supplemental oxygen to treat. Oxygen therapy at home may not be the life-saving treatment you need. ...Read more

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My eldest suffers wiv asthma and they have rwcently axed all piediatric services would it be adviasable too request home oxygen only to be used in 911?

My eldest suffers wiv asthma and they have rwcently axed all piediatric services would it be adviasable too request home oxygen only to be used in 911?

Maybe: Oxygen should only be used under close supervision; some people with asthma may actually get worse or stop breathing on oxygen. Standard treatment for asthma is best, oxygen is really safest to use in a hospital setting. ...Read more

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Is a portable oxygen concentrator okay to use if you suffer with asthma?

Is a portable oxygen concentrator okay to use if you suffer with asthma?

Yes: but not usually necessary for asthma. Only in very severe case of asthma would oxygen be used. Else you are simply wasting money. ...Read more

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Does asthma cause hypoxia? What is the oxygen saturation in people who have asthma?

Does asthma cause hypoxia? What is the oxygen saturation in people who have asthma?

It can: Asthma can reduce the area of the lung available for co2/oxygen exchange and can do so with variable intensity during an asthma attack. Given a normal o2 % of 94-100, I have seen levels below 50% recorded but patients are usually quite symptomatic below 90%. When an attack is passed and the patient relaxed, the levels return to normal with work of breathing decreased to normal. ...Read more

Dr. Scott Bolhack
3,103 doctors shared insights

Oxygen (Definition)

Oxygen is a gas that the cells in your body need to work properly. The air we breathe normally has 21% oxygen. A maximum of 100% oxygen can be given. Babies with heart or lung problems may need ...Read more