What is red light in pulse oximeter?
The pulse oximeter uses two lights to analyze hemoglobin. One is a red light, which has a wavelength of approximately 650 nm. The other is an infrared light, which has a wavelength of 950 nm. The pulse oximeter works out the oxygen saturation by comparing how much red light and infra red light is absorbed by the blood.
What do the numbers on a finger pulse oximeter mean?
The pulse oximeter measures two distinct things: The first number that comes up is most often the pulse rate. Usually this number is marked by a small heart. The second number that comes up is the level of oxygen in the blood. Both numbers are needed to assess your present levels.
What are the 2 readings on a pulse oximeter by finger?
A pulse oximeter reading will have 2 numbers, the pulse rate (or heart rate) and the “SpO2” or percentage of oxygen in the blood.
Why do pulse oximeters use red light?
Pulse oximeters use red and infrared light to monitor pulse rate and the oxygenation of a patient’s blood. The body scatters and absorbs visible and near infra-red wavelengths significantly so that in order to have a measurable signal thin parts of the body must be used.
At what oxygen level should you go to the hospital?
90% or less This oxygen level is very concerning and may indicate a severe medical problem. Call 911 or go to your nearest emergency room immediately. You may need an urgent x-ray or heart test. 91% to 94% This oxygen level is concerning and may indicate a medical problem.
How do I know if my Oximeter is accurate?
Remove any fingernail polish on that finger. Sit still and do not move the part of your body where the pulse oximeter is located. Wait a few seconds until the reading stops changing and displays one steady number.
What is normal pulse rate in oximeter?
Your pulse rate, also known as your heart rate, is the number of times your heart beats per minute. A normal resting heart rate should be between 60 to 100 beats per minute, but it can vary from minute to minute.