NURS307- Midterm Exam Guide - Comprehensive Notes for the exam ( 26 pages long!)
11 Oct 2017
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Document Summary
Air: 21% ox, 79% nitrogen and small amounts of other gases. Spo2 (saturation of peripheral oxygen) = the measurement of saturation of oxyhemoglobin. This measurement is obtained non-invasively by pulse oximetry. Fio2 (fraction of inspired oxygen) = the concentration of oxygen in the gas actually being inspired into the lungs and written as a fraction of 1 (ex. How do we determine if someone needs oxygen therapy. Change in mental status brain tissue very sensitive to oxygen saturation. Increase in blood pressure if 02 is low, body is going to compensate so heart will work harder to get more circulation out to oxygenate tissues. Dysrhythmias ischemia, heart muscle needs a lot of oxygen as well. Diaphoresis and cool extremities shunting blood to the core bc body is stressed from decreased o2. Late sign cyanosis late sign of decreased oxygenation. Based on red + infrared light absorption, oxygenated hemoglobin molecule will absorb the infrared light.
