Inhalation Sedation Flashcards
What are the aims of inhalation sedation?
Anxiolysis (reduces fear/anxiety) & analgesia (reduce pain)
Also to improve cooperation
What does Anxiolysis mean?
Reduce fear/anxiety
What does analgesia mean?
Reduces pain
How much heavier than air is nitrous oxide?
1.5
What coloured cylinders is nitrous oxide supplied in?
Blue
What size do nitrous oxide cylinders come in?
Size E
What pressure is nitrous oxide stored a liquid under?
44bar or750PSI
What are the properties of Nitrous Oxide?
Colourless and virtually odourless
How heavy is a full cylinder of Nitrous Oxide?
20lbs
How much Nitrous Oxide is needed to produce unconsciousness?
70%
What coloured cylinders is Oxygen supplied in?
Black with a white shoulder / by 2025 they will all covert to white bodies and carry the name oxygen on them
What pressure is oxygen stored a liquid under?
137bar or 2000 psi
What does MAC stand for?
minimum alveolar concentration
When referring to gases what does MAC relate to?
Potency (strength)
What is the time weighted average (TWA) for staff working with nitrous oxide?
100ppm over an 8 hour time period.
What does a half full nitrous oxide cylinder contain?
Gas above a liquid
What does a full oxygen cylinder contain?
Gas
Who has the legal responsibility for checking the inhalation sedation machine?
The treating clinician
Gases used for sedation have a relatively high MAC. What is it?
105
The MAC being “high” means that nitrous oxide is?
A weak anesthetic
Why is it virtually impossible to produce anaesthesia using nitrous oxide alone in a patient who is adequately oxygenated?
The MAC is over 80
At what concentration of nitrous oxide is plane 1 obtained?
5-25%
What is the seal called on the oxygen cylinder?
Bodok seal
At what concentration of nitrous oxide is plane 2 obtained?
20-55%
At what concentration of nitrous oxide is plane 3 obtained?
Above 50%