Background Information

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    A pulse oximeter is an electronic piece of medical equipment that is used to measure the amount of oxygen in your blood, without having to drawing any. The way it does this is that it sends two different wavelengths of light through the finger.  Depending on how the wavelength are absorbed, the pulse oximeter is able to determine the level of oxygen saturation.  Pulse oximeters are  typically used for patients with hypoxic drive problems. But we are using it to determine if diving affects hemoglobin saturation levels in the blood and heart rate. 

    Hemoglobin is the protein molecule that is found in red blood cells.  It carries oxygen from the lungs to different parts of the body, then it transports carbon dioxide back to the lungs to be expelled into the atmosphere. Besides hemoglobin, the human blood also consists multiple other things of white blood cells, plasma and glucose.  But hemoglobin is our main focus for the experiment, because with the of a pulse oximeter, we will be able to measure heart rate and oxygen saturation.  Once we we have collected the data from our tests, we will be able to compare our results and compare

-Pulse Oximeter


    There is usually just normal air inside of a scuba tank. Normal air is approximately 78% nitrogen, 21% oxygen, and 1% of other gasses. However, in a nitrox tank, the air is 32% oxygen and 68% nitrogen. This is useful because with the higher percentage of oxygen, your heart does not have to work as heard, therefore making you less tired than if you were to breathe out of a regular tank.