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43 Cards in this Set
- Front
- Back
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when using scvanging sys, In closed interface, what should scavenging bag be?
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partially inflated at all times
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If scavenging bag in closed interface is continually collapsed or neg pressure valve opens frequ...
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flow should be lowered
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If scavenging bag in closed interface is fully distended,
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flow should be increased
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Open interface scavenging system should always be used with what type?
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active
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when manually ventilating, what does the scavenging bag do?
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slightly expand/deflate
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which type of interface requires positive pressure relief valve?
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closed, so pressure doesn't build up in pt.
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which type of system doesn't have valves?
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open
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Open interface should only be used with
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active disposal system
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which type of interface has the parallel tubes in the resevoir?
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open
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does closed system have valves?
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yes
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which type of interface requires resevoir/does not require resevoir?
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closed does not require resevoir (should only be used with active); open does require
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A closed interface with only positive pressure relief should only be used with a
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passive disposal sys
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In closed interface, if active disposal sys. used,
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negative pressure relief valve must also be present
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T or F: both passive and active disposal systemes can be used with closed interfaces
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T
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when manually ventillating, what happens to scavenging bag,
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slightly inflates, deflates
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Open interface should be used with which type of disposal system?(Active, passive, open, closed?)
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active
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which type of interface has valves?
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closed
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what is always required with a closed interface? +pressure relief valve,-pressure rel. valve,resevoir, all
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positive pressure relief valve
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What gas can't be absorbed?N2, CO2, N2O
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N2O
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In this type, air is recirculated to room
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recirculatory
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what are the two types of active disposal system?
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active, piped
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what is most common type of acive disposal system?
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piped
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T or F: in active disposal systme gasses are "pushed".
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F. pulled
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Always required for active duct sys. A. neg pressure relief B. valve and res. C. positive pressure D. All
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A and B. neg pressure relief and valves and res.
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which type of system can use both passive and active disposal sys?
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closed
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open system requires what type of disposal system?
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active
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What are the types of passive absorption?
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room ventilation system, piping direct to atmosphere, absorption device
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in what type of disposal system is pushing happening, not pulling
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passive
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descrive the absorption device of passive disposal system
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activated charcoal
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Two types of passive ventilation systems
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nonrecirculating, recirculating
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T or F: in recirculating system air is recirculating to room
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T
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Problems w/passive disposal system of piping direct to atmosphere
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+/- pressure by wind currents or obstruction, need to ensure system patency, requires special installation
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Benefits of passive disposal system of piping direct to atmosphere
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easy to use, low maintenance cost
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What does efficiency of adsorption device depend on?
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agent, flow rate thru canister, and moisture. moisture may reduce efficiency
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Overall advantages of passive disposal system
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simpler than active, less expensive than active
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Disadvantages of passive disposal system over active
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not as effect in lower trace gas levels b/c + pressure promotes outward leaks
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What type of disposal system has negative pressure in gas-disposal tubing?
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Active disposal system
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Disadvantages of piped vaccum (active disposal)
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inad # of vacuum outlets,inconve outlets,system overload,damage to vac. sys,person.exp, inconv (on/off)
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can move large volumes of gas at low neg pressures
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active duct sys
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uses flow-inducing devices(fans,pumps,blowers, etc)
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active disposal system
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Disadvantage sof active disposal system over passive disposal system
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complex, req. -press. relief and res. capacity, special install., flow inducing device req added energy and maint
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advantages of active duct sys over passive
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resistance not a prob, wind doesn't affect sys.
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Disadvantages of active disposal system over
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more complex,expensive, not automatic, (on/off);requires interface to have negative pressure relief
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