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Normal oxygen levels using a pulse oximeter

A 51-year-old female asked:
Dr. Leonard Stein
A Verified Doctoranswered
A US doctor answeredLearn more
Not Normal: Usually a persons O2 sat should increase or stay same w mild-mod exercise. Do U have HX of smoking or asthma? Even so, UR fall in O2 sat is rather sig... Read More

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A 55-year-old female asked:
Dr. Bennett Machanic
Neurology 52 years experience
Varies: But depending upon altitude, at sea level should register in mid to high 90's, assuming no prior COPD, bad asthma, or tuberculosis.
A 17-year-old male asked:
Dr. Gregg Vagner
Hand Surgery 24 years experience
Close to 100: The closer to 100, the better. Most consider optimal above 92.
Dr. William Walsh
Addiction Medicine 17 years experience
Normal for what?: At sea level at rest in a healthy person, between 95-99%, depending on the instrument.
A 17-year-old male asked:
Dr. Lonna Larsh
Family Medicine 30 years experience
Not necessarily: If the heart attack is huge, the heart will not pump effectively and blood will not circulate normally, causing a low oxygen saturation. More commonl... Read More
A 51-year-old female asked:
Dr. Geoffrey Rutledge
Internal Medicine 41 years experience
Lung condition: The lowered reading can be an error, depending on the quality of your pulse oximter. If the reading is valid then it may reflect a problem with your l... Read More
A 40-year-old male asked:
Dr. Yvette Kratzberg
Pediatrics 24 years experience
Yes: When O2 levels drop consistently below 93%, it means that your body is not getting enough oxygen because the infection might be compromising your lung... Read More
A 25-year-old female asked:
Dr. Silviu Pasniciuc
Internal Medicine 27 years experience
Oxygen saturation: Is typically checked at rest, during light activities- a6 min walk and at night during sleep. Yours is on the low range of normal and I suspect it mig... Read More
A 37-year-old male asked:
Dr. Gurmukh Singh
Pathology 49 years experience
You likely measure your oxygen saturation at rest and it is good that your level is satisfactory. What you described could limit your ability for stre... Read More
A 31-year-old male asked:
Dr. Deborah Ungerleider
Pediatrics 36 years experience
Possibly : There are some studies and reports that a person’s oxygen level may decrease before serious symptoms from Covid-19 are seen.So measuring this at home ... Read More
A 32-year-old female asked:
Dr. Robert Kwok
Pediatrics 33 years experience
Both: The machine works by detecting a regular pulse and then calculating the oxygen saturation of the blood cells by percentage. If the machine is not able... Read More

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