A pulse oximetry gives what type of information about the client?
A. Amount of carbon dioxide in the blood
B. Amount of oxygen in the blood
C. Percentage of hemoglobin carrying oxygen
D. Respiratory rate
Correct Answer: C. Percentage of hemoglobin carrying oxygen.
The pulse oximeter determines the percentage of hemoglobin carrying oxygen. This doesn’t ensure that the oxygen being carried through the bloodstream is actually being taken up by the tissue. Pulse oximetry is a non-invasive monitor that measures the oxygen saturation in the blood by shining light at specific wavelengths through tissue (most commonly the fingernail bed).
Option A: A CO2 blood test measures the amount of carbon dioxide in the blood. Too much or too little carbon dioxide in the blood can indicate a health problem. A CO2 blood test is often part of a series of tests called an electrolyte panel. Electrocytes help balance the levels of acids and bases in the body. Most of the carbon dioxide in the body is in the form of bicarbonate, which is a type of electrolyte. An electrolyte panel may be part of a regular exam.
Option B: A blood oxygen level test is used to check how well the lungs are working and measure the acid-base balance in the blood. A blood oxygen level test also checks the balance of acids and bases, known as pH balance, in the blood. Too much or too little acid in the blood can mean there is a problem with the lungs or kidneys.
Option D: The respiration rate is the number of breaths a person takes per minute. The rate is usually measured when a person is at rest and simply involves counting the number of breaths for one minute by counting how many times the chest rises.
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