McqMate
| Q. |
What principle does pulse oximetry follow? |
| A. | Law of Absorbance |
| B. | Law of Reflection |
| C. | Beer – Lambert Law |
| D. | Law of Irradiance |
| Answer» C. Beer – Lambert Law | |
| Explanation: Beer-Lambert relates the emerging light with the concentration of the solution and the thickness of vial/object containing the solution. When light is incident on the solution, some of the light is absorbed. This absorption depends on the concentration of the solution and the distance the light travels before it emerges. This light is measured on the outgoing end and it gives a measure of how much oxygen exists in the blood. | |
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