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How does oximeter work

A 30-year-old member asked:
Dr. Dan Fisher
Internal Medicine 27 years experience
Measure light: When hemoglobin in blood carries oxygen it is a slightly different shape than when not carrying oxygen. Different shape causes different absorption of... Read More

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A 25-year-old male asked:
Dr. Julie Abbott
Preventive Medicine 45 years experience
In fact,: the oximeter is so sophisticated that it only measures the substance that has "changing absorbance" (arterial blood"); it is able to disregard "non-ch... Read More
A 44-year-old male asked:
Dr. Amrita Dosanjh
Pediatric Pulmonology 36 years experience
Symptoms: A pulse oximetry reading with no symptoms above 92% is considered safe. Movement of your arm can cause a misreading.
A 51-year-old male asked:
Dr. Bennett Machanic
Neurology 52 years experience
Persistent issues: I am pleased to hear of presence of antibodies by 7 months, as this does confirm ongoing immunity from the strain you caught. The pulse ox is indeed ... Read More
A 45-year-old female asked:
Dr. James Ferguson
Pediatrics 46 years experience
Not what we offer: This is a health information site where volunteer docs answer questions about health conditions. It does not offer scripts/notes or send treatments to... Read More
A 28-year-old male asked:
Dr. John Van der Werff
Dentistry 39 years experience
Device: It is a device that measures the amount of oxygen in the blood stream. A sensor is placed over a finger and measurements are taken and recorded by th... Read More
A 28-year-old male asked:
Dr. Donald Colantino
Internal Medicine 61 years experience
Perfusion index: Since the normal range of perfusion index ranges from 0.02% to 20%, you are within normal range showing good pulse strength and good peripheral perfus... Read More
A 45-year-old member asked:
Dr. Steven Neish
Pediatric Cardiology 38 years experience
Normal: Normally, there should be no change in pulse oximetry with exercise. If your pulse oximetry reading is in the high 90s or 100% at rest it should stay ... Read More
A 66-year-old female asked:
Dr. James Ferguson
Pediatrics 46 years experience
Hard to say: In the USA these are available over the counter through variety stores/pharmacies. How they are sold in your country is not information we have. Whet... Read More
A 24-year-old male asked:
Dr. Kristin Sokol
Allergy and Immunology 12 years experience
One might be wrong: Two pulsoximeters - one reading 96% and one reading 89%, indicating one probably wrong. Not sure what your home pulsoximeter is for, but if you are ha... Read More

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