Anesthesia Machine Review (EXAM #1) – Flashcards
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Three most important things in anesthesia (per Dr. Radesic)
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VIGILANCE
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FIRST item on FDA Anesthesia machine checklist?
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Ambu-bag present
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TWO sources of O2
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Pipeline (main source) E-cylinders (back-up)
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Full oxygen tank
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625-660 L 2,000-2,200 psi = 149 ATM = 113,741 mmHg
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Pressure in tank is directly proportional to volume in tank
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Boyles Law
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Current psi = 800 psi O2 @ 5 LPM, How much time left?
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800/2,000 (full tank) = 0.40 = 40% full 0.40 x 625 L (full tank) = 250 L 250/5L = ~ 50 mins (psi. x 0.3 = Liters left) (800 psi x 0.3 = 240 L)
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Full Nitrous tank
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745-750 psi (1590 L)
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Pressure below 745 psi?
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75% or more exhausted (Needs to be weighed to know for sure)
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High pressure system psi?
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2200 psi (tank)
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Intermediate pressure system psi?
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37-55 psi (pipeline)
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Low pressure system psi?
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16 psi (flowmeters)
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First stage regulator decreases pressure to?
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40-50 psi (in yolk system)
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Second stage regulator decreases pressure to?
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12-16 psi
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Oxygen flush valve flow & pressure?
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40-50 psi VERY HIGH FLOW = 35-75 L/min
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Flow directional valves
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- Check valves - Permits flow to and from the patient (one-way) - Prevents rebreathing of exhaled gases - Prevents back flow of gases
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Oxygen Ratio monitor control
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Only on Drager
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Carbon Dioxide Absorbent
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- Chemical neutralization reaction (exothermic) = carbonate salt + water +heat - Turns purple when exhausted - 25 L CO2/100 grams absorbent
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PIN INDEX for all gases
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Oxygen = 2, 5 Nitrous = 3, 5 Air = 1, 5
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Machine checkut guidelines
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- Newer ASA 2008 guidlines - Recommendations from FDA - Revised in 1993
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Regulates medical gas cyclinders
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DOT
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Three agencies that regulate anesthesia machines
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ASTM ANSI FDA
