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24 Cards in this Set

  • Front
  • Back
3 categories of safety considerations
hazards of waste anesthetic gas

handling compressed gas cylinders

potent injectable drugs
Short term effects of waste anesthetic gas
brain neurons effected

fatigue, headache, drowsiness, nausea, depression, irritability
Long term effects of waste anesthetic gas
reproductive disorders, liver & kidney damage, bone marrow abnormalities, chronic nervous system dysfunction
Ways to reduce waste gas exposure
scavenging system
testing equipment for leaks
use techniques & procedures that minimize exposure
Define passive scavenging system
uses positive pressue of gas in anesthetic machine to push gas into scavenger
Define active scavenging system
uses suction created by vacuum pump or fan to draw gas into scavenger

most efficient
2 types of passive scavenging systems
waste gas discharged outdorrs through a hole in the wall

end of transfer hose placed adjacent to room ventilation exhaust or nonrecirculating air conditioning system
Problems that may occur with scavenging system
excessive negative pressure breathing circuit causes collapse of reservoir bag

obstruction may occur causing excessive pressure
Problems resulting in waste gas leakage
connections for nitrous oxide gas lines not tightly secured

seals joining nitrous oxide tanks to machine are missing, torn, or out of position

covering over unidirectional valve not tightly closed

CO2 absorber not securely sealed

connection between pop-off valve and scavenger is not airtight

holes or insecure placement in hoses, reservoir bag, ET tube

vaporizer cap not replaced after vaporizer was filled
High pressure leaks
leaks in nitrous oxide of O2 supply

arise between gas tanks and flowmeter, pressure 50psi +
Low pressure leaks
gas escapes from anes machine

parts do not fit together properly or develop hole

Anesthetic thought to be least toxic to hospital personell is:
NIOSH recommends that levels of anesthetic gas should not exceed:
2 ppm
The odor of halothane may be detected by a person when levels reach a minimum of:
33 ppm
It is recommended that for a passive scavenger system, the hose be no longer than ____ if it discharges into the room ventilation exhaust
10 feet
How often should a test for low-pressure leaks be conducted?
each time the machine is used
Rooms in which waste gases are at risk of being released should a have a minimum of ___ air changes per hour
High pressure system tests (nitrous oxide)
1) Place solution of water & dishwashing liquid on tank's connections & joints. Observe for bubble formation

2) Note reading on tank pressure gauge. Mantain pressure in system & check gauge in 1 hour. Leak present if there's a change.
Low-pressure system test: circle systems
Secure all connections (close pop-off valve & Y piece) Squeese bag after it's filled. If air escapes there's a leak
Low-pressure system tests: nonrebreathing systems
Attach apparatus to inspiratory hose, closing pop-off valve and patient port. Introduce O2, reservoir bag fills. Turn off flowmeter after pressure gauge reads 20cm H2O. Observe pressure for 20 seconds. A signficant decrease in pressure indicates leak
Ways to minimize waste gas release
avoid using masks
use cuffed ET tubes
use closed rebreathing systems
vaporizer should be on only when patient is connected
do not release contents of reservoir bag into room air
ensure adequate ventilation
have machines served annualy
discard damaged hoses, bags, ET tubes
wash parts after procedures
careful with filling vaporizer
empty anesthetic bottles b4 discarding them
passive dosimeters
detect anesthetic gases

worn by personell and returned to supplier for analysis
injectable drugs of most concern
etorphine (Immobilon, M99)
carfentanil (Wildnil)
precautions with injectable drugs
do not handle without training
never work alone
wear gloves
reversal agent ready
properly dispose of syringes