Drexel Anesthesia Machine Numbers! – Flashcards
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misuse of Gas delivery equipment is __ times more likely than equipment failure?
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3
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The latest Machine checklist was published in what year?
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2008
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A material or mixture is a compressed gas if in a container the absolute pressure exeeds __psi @ ___degrees F (low) or ___ psi @ ____ degrees F ( high)
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40⁰ @ 70F to 104⁰ @ 130F
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Fractional distillation represents ____% of the manufacturing process of O₂
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80
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Liquid O₂ occupies __ the space of the gas form.
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1/860th
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28.3L of liquid O₂ Produces ______L of O₂ gas?
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24,338
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N²0 containers must contain ---% n2o
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99
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Liquified compressd gasses become liquid at pressures ranging from ____psi to ____psi (N²0 & CO₂ )
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25 to 1500
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Steel cylinder marking
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3AA
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Aluminum Cylinder marking
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3AL 3ALM
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O₂ pin combination
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2,5
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Air pin combination
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1,5
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N²0 pin conbination
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3,5
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Temperature wood's metal will rupture at?
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157⁰F -175⁰F
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Pressure of N²0 in e- cylinder that is 50% empty
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≈745 psi
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Pressure of O² in full e- cylinder
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≈ 2000 psi
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Volume ( liters) of full O₂ tank
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660L
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Volume ( liters) of half full N²0 tank
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800 L (Half of 1600L)
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With a special permit, gas cylinders must be tested every_ yrs
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10
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Gas cylinders must be tested every_ yrs
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5
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in the us, gas cylinders must be tested by pressurizing to ____ times thier service pressure.
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1.66
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Pin system has ___ positions and ___ possible combinations
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6, 10
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In the hospital's system the Cylinder bank's pressure is reduced to ___
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50 psi
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The critical temperature of O₂is?? (Liquid O₂must be stored below this temp)
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-119 ⁹F
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Pneumatic bellows utilize ___ lpm of O2 ( ventilator drive gas)
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7 or more
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Anesthesia machine standards = ASTM F_____ - 00
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1850
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ATSM: Battery backup has to power the machine at least ____ mins
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30
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ATSM: High priority alarms may not be silenced more than_____seconds?
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120
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ATSM: High priority alarm if oxygen falls below ___ % ( or user set limit)
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18
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the 1st Stage regulator reduces the pressure of all cylinder gas to ___
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45 psi
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The second stage regulator reduces O₂pressure to
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14 psi ( on Datex machines for link 25 system and to avoid fluctautions caused by pipeline pressures)
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Filling an empty N²0 cylinder will increase its weight by?
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2.9 kg (The tare weight should be stamped on the cylinder)
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Vapor Pressure of Sevoflurane
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160 mmHg (at 20 °C)
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Vapor Pressure of Isoflurane
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238mmHg (at 20 °C)
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Vapor Pressure of Desflurane
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664mmHg (at 20 °C)
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Vapor Pressure of Halothane
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243mmHg (at 20 °C)
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ATSM: Maximum allowable pressure in a breathing circuit is __ psi.
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125 cm/H²O
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ATSM: All machines must have ____ O² cylinder(s)
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1 minimum
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O2 flush valve pressure?
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45 psi on cylinder gas or 50 psi if using wall gas
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O2 flush valve gas flow rate?
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35 - 75 Lpm
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What is "room temperature"?
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20⁹C (68-70⁹F)
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The second stage regulator reduces N²0 pressure to ?
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26 psi ( on Datex machines for link 25 system and to avoid fluctuations in pipeline pressures)
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In the event of fluctuations in wall supply pressure, the machine can run on wall pressures as low as
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27 - 30 psi
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ASTM: The low pressure system can produce a pressure of ____between flow control valve and common gas outlet with vaporizers off
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30 cm/H20
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ASTM: The low pressure system has a gas flow rate if ____?
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30ml/min between flow control valve and common gas outlet with vaporizers off
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Common Gas outlet: The inner diameter is?
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15mm female -( Also will accept a 22mm tracheal tube connector)
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Lowest flow of oxygen possible through flowmeter - even if machine off!
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200ml/min
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Highest gas flow rate through flowmeters.
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15 lpm
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Number of flowtubes for each gas in the machine.
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2
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ASTM: Flow meter knobs have to be at least _____ apart? (distance)
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25 mm
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Flowmeters are calibrated at ____ to ____% accuracy?
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2- 10% by the factory based on where it will be delivered.
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Electronic flowmeters are ____ to ____ times more accurate than glass flowmeters.
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5 to 10
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Current anesthetic agents exist as a liquid at temperatures below_____?
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20⁹C ( room temp)
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Variable bypass, flow over wick, temperature compensated vaporizers are type___?
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1
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The Tech 6 Vaporizer pressurizes desflurane to what pressure?
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2 atm. (1300 mmHg)
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The Tech 6 Vaporizer heats desflurane to what temperature?
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39 C
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The tech 6 vaporizer has two circuits. What is the agent saturation percent in the 2nd circuit?
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100%. It is then injected into gas from the other circuit.
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If the vaporizer is tilted _____ (degrees) from vertical position, it is considered a tip.
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45deg
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After tip, you can dry the wicks by flushing at high flow, with vaporizer fully open for ______ (time)?
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20 - 30 mins ( or consult product information user guide)
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If vapor calibration is off by _____ or more, it has to be taken out of service.
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30%
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Vaporizer math: N= ? N(FGF)(Volume% of agent) = ml used per hour
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N = 3
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Min amount of pressure that is in a circle system?
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2.5 mmHg (200ml/min O2 always flowing)
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Esophageal spincter resistance pressure?
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20 cm/H2O
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Average volume of an adult ERB?
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3L
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Circle system: closed Pop-off closed, near total rebreathing. FGF is around________(rate) ( Fresh gas inflow = patient uptake)
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0.3 to 0.5 LPM (300 to 500 ml/min)
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Circle system: semi-open Pop-off open, no rebreathing. FGF is around________(rate)
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>6 LPM
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Soda should contain ______ water?
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10-22%
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Circle systems can be used for all ages down to ____(weight)
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10 kg
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Circle system: semi-closed Pop-off at intermediate value, some rebreathing. FGF is around________(rate)
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3-6 LPM
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Inspiritory and expiratory connectors must have male connectors with _______ outer diameter.
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22mm
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Temperature within soda lime can reach___?
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45 - 50⁹C
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1 mole = ______ liters
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22.2
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The exothermic reation of CO₂ absorption release _______kCal per 1 mole of CO₂absorbed.
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13,700 kcal
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Air to granule ratio in a soda lime canister?
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≈1:1
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100 gram of Soda lime absorbs ____ CO₂?
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26 L (500 gm canister absorbs ≈130L CO₂)
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Average human CO₂production?
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200 ml/min or ≈15 L/hr
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500 gram soda lime canister should last ______(time)?
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≈ 10 hours
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Accepted size of sodalime granules
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4-8 mesh
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Compound A is lethal at _____ppm?
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130- 340
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Sevoflurane.... Compound A concentration that is achievable in clinical practice which produces renal toxicity in rats?
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25-50 ppm
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FDA requires this flow rate for Sevo. when procedures last up to 1 hour, or greater than 2 hours respectively.
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1 L/Min & 2L/min
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Newer soda limes nearly eliminated compound A & CO (carbon monoxide) by-product production by removing potassium hydroxide as an ingredient and reducing sodium hydroxide to _____________%
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<3.7%
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The Bain ( modified mapleson- D) need _____(rate) of FGF for controlled ventilation.
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70 ml/kg per min ( The greater of 5 L/min or 2-3 times the T.V.)
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1% is how many PPM of gas?
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10,000
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In an 8 hour time weighted sample _____ppm is acceptable for a Halogenated agent with N²0
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0.5
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gas flow into the scavenging system flows at ______(rate)?
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25 L/min
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In an 8 hour time weighted sample _____ppm is acceptable for N²0 in a dental facility.
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50
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The Bain ( modified mapleson- D) need _____(rate) of FGF for Spontaneous ventilation.
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100 - 300 ml/kg per min
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In an 8 hour time weighted sample _____ppm is acceptable for a Halogenated agent alone
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2
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The transfer means consists of tubing measuring ______ or _____
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19mm or 30mm
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The scavenger system's negative relief valve opens at _____
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-1.8 cm/ H²O
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In an 8 hour time weighted sample _____ppm is acceptable for N²0. (non dental)
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25
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The scavenger system's positive pressure relief valve opens at _____
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5 cm/ H²O
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Amount of negative suction pressure in a passive scavenger system?
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none - its passive
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Thermocameras used in construction for N²O leak detection can detect concentrations as low as _____
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100 ppm
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The "pressure below threshold alarm will sound after ______to _____ (time)?
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15- 30 secs
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Low O² pressure alrm will sound when the pressure drops to ______?
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25- 30 psi
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In Ohmeda machines the "fail safe system - will alarm audibly and visually if the pressure decreases to ___
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≤ 30 psi
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In Ohmeda machines the "fail safe system - pressure sensor shut off" SHUTS OFF N²O if O² pressure decreases to ___
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≤ 20 psi
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In the link-25 system the O² knob and the N²O knob have ____& ____ teeth respectively
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29 & 14
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Drager's O² ratio monitor controller proportionally reduces the concentration of N²O as O² pressure drops. however it will completely stop the flow of N²O if O² pressure drops to ____.
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10 psi
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Drager's SENSITIVE O² ratio monitor controller (s-orc) guarantees a minimum O² of ______%.
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23% (also will supply pipeline AIR if there is complete O² pipline failure!)
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A new galvonic cell should last____to____ months?
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9- 12
