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43 Cards in this Set
- Front
- Back
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What color is O2 cylinder?!?
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green
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What color is N2O cylinder?
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blue
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What color is CO2 cylinder?
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grey
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What color is air cylinder?
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yellow
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What color is He cylinder?
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orange
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why store tank upright?
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decrease chance of condensation accumulating on the side of the cylinder (weakest pt) and causing corrosion
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Are O2 and N2O flammable?
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no, but they support combustion so keep away from flammable agents
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How does the DOT test cylinders?
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Hydrostatic testing q 5 yrs
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How does hydrostatic testing work?
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1. cylinder emptied and filled with water
2. submerged in water 3. pressurized to 3000 psi 4. causes cylinder to expand 5. water gets displaced into burette 6. if there's a hole in cylinder bubbles form and furter displace water in burette |
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What are the pin positions for O2?
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2,5
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What are the pin positions for N20?
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3,5
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What are the pin positions for air?
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1,5
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What is the pressure of the pipeline O2?
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50-60 psi
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What do compressed air systems have that make them potentially dangerous to people?
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oil-lubricated, can cause oil pneumonitits
(system is used for air tools not people) (100 psi) |
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What is a simple breathing system with no valves, hi gas flows, dilution of anesthetic with room air, and for spontaneous ventilation only?
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the open system: insufflation
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What is the only way to accurately deliver concentration of gas during insufflation anesthesia?
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to exceed the peak inspiratory flow with flow of gas
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What has one way inspiratory and expiratory valves; gas supply must equal TV unless there is a self-inflating reservoir bag?
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AMBU valve
typical valve resistance = 1-2 cm H2O |
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What is an example of a demand valve?
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SCBA
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What is a 3 limb system:
fresh gas flow pt reservoir/outflow? |
Ayre's T-piece
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What are advantages to Ayre's T-peice system?
(2) |
valveless/low resistance
minimal dead space |
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What are disadvantages of Ayre's T-peice system?
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High gas flow only
2-3 x minute ventilation non-scavenging spontaneously ventilating only |
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What system added a bag to the t-peice systme and expiratory valve?
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Magill system
expiratory valve at mask improved efficiency in spontaneously vent |
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What is the Mapleson A system used for?
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spontaneously vent peds - expiratory valve close to pt, fresh gas flow = min vent
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What ist the Mapleson D used for?
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aka Bain system
controlled ventilation |
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What are advantages to the Bain system?
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light weight
low resistance minimizes work of breathing |
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What system has 2 valves, reservoir bag and CO2 absorber?
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Circle system
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Describe the flow thru the circle system
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1. Fresh gas enters from CGO of anesthesia machine
2. Flows thru insp. limb 1-way valve 3. thru insp breathing tube 4. thru y peice to pt 5. from pt thru exp breathing tube 6. thru 1-way exp. valve 7. in and out of reservoir bag 8. thru absorbent canister 9. back to pt (excess gas out thru APL or scavenging system) |
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What is resistance typically in circle system from tubing and valves?
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2cm H2O PEEP
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What is typical granule size in CO2 absorber?
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4-8 mesh
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What is it called when flow is greater than minute volume in circle system?
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open system
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What is it called when flow is less than minute volume in circle system?
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semi-closed system
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What is it called when pt is consuming the amound of gas given in circle system?
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closed system
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What is the main source of resistance in the circle system?
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valves (adds 80 mJ of work; resistance increases work of breathing 27%)
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What can depress cardiac filling, CO and increase rate of anesthetic induction?
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PEEP
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True/False
Spontaneous ventilation functions as a negative feedback system during GA. |
true
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What provides a source of gas to meet peak inspiratory demand (~50 L/min)?
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Reservoir bag
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What provides a recepticle for pt's exhaled gas and fresh gas flow?
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Reservoir bag
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What provides some protection for overpressure in breathing ciruit?
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Reservoir bag
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What pops off excess pressure whenever valve setting is exceeded?
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APL valve
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In which anesthesia machine is the pt's TV a combo of vent volume and fresh gas flow?
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Narcomed
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In which anesthesia machine is the pt's TV independent of fresh gas flow?
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GE Avance
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What happens on exhalation using the GE Avance?
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pt's gas and fres gas flow into bellows;
pop off valve opens when bellows full |
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What happens on inhalation using the GE Avance?
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pop-off valve closes;
bello's gas and fresh gas flow to pt |
