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10 Cards in this Set
- Front
- Back
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What is Charles law and its application to anesthesia practice?
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Charle's law states that for a constant pressure the volume of gas is directly proportional to its temperature. The application for this gas law is when an LMA inflatable cuff expands in an autoclave
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What is Henry's Law and its application to anesthesia practice?
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Henry's law states that the amount of a gas that dissolves in liquid is proportional to the partial pressure of the gas in the gas phase. Its application is its ability to determine the amount of dissolved oxygen/CO2 in the blood
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How do you convert mm Hg of oxygen into ml/100ml blood?
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Multiply 0.003 * O2 mm Hg
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How do you convert FiO2 into ml/100ml blood?
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Multiply (FiO2 * 5) * 0.003
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How do you convert mm Hg CO2 into ml/100ml blood?
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Multioply 0.06 * mm Hg CO2
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How much does dissolved O2 increase when PaO2 increases from 100 to 500?
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Calculate what it is at 100. (100*0.003)=0.3
Calculate what it is at 500. (500*0.003)=1.5 Look at difference between 2 values. 1.5-0.3= (Answer is that O2 increased 1.2mL/100mL) |
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What is Boyle's law? Application?
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Boyle's law states that at a constant temperature pressure is inversely related to volume...more pressure, less volume. Applications include: ambu bag, spontaneous breathing, gas cylinder
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What is Gay-Lussac's law? Anesthesia application?
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Gay Lussac's law states that at constant volume, pressure is directly proportional to absolute temperature. When temperature in a gas cylinder increases, the pressure increases. Application: cylinders in transport. If a cylinder goes from cold environment to warm one, pressure increases. Conversely, cylinder moved from loading dock (45C) to OR (20C), the pressure in the cylinder decreases (hot to cold, pressure decreases). **Remember, cylinder has a constant volume.
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What is the generalized Ideal gas law?
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PV = nRT
pressure(volume) = moles of gas( universal gas constant) * Temperature |
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What is venturi's effect and Bernoulli's principle? Application?
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When fluid flows through a constricted region of a tube (Venturi Tube), the velocity of flow increases (visualize a narrowing in a stream), and the lateral pressure (the pressure exerted by the fluid on the walls of the tube) decreases (Bernoulli effect). Nebulizers and jet ventilators
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