nitrous

Question 1

inhalation

Answer 1

1) sedation with N2O and O2 is very safe
2) >20% oxygen using a failsafe
3) titrate to effect
4) analgesic properties

Question 2

inhalation advantages

Answer 2

1) more rapid (2-3 mins)
2) peak clinical effect
3) sedation level readily changed in either direction
4) duration is variable and controllable
5) recovery 3-5 minutes with 100% O2

Question 3

contraindications

Answer 3

1) congestive heart failure (for sure)
2) relative
- COPD
- pregnancy 1st trimester avoid
- claustrophobia

Question 4

disadvantages

Answer 4

1) initial cost of equipment
2) cost of gases
3) N2O not a potent agent
3) chronic exposure can be detrimental

Question 5

N2O chemical properties

Answer 5

1) relative insoluble in blood
2) low potency
3) 100x more soluble than oxygen
4) fills air spaces 35x faster than N2
- caution with pneumothorax, bowel obstruction, and typanoplasty patients

Question 6

concentration effect

Answer 6

1) more gas delivered leads to more gas absorbed

Question 7

diffusion hypoxia

Answer 7

1) rapid diffsion of H2O from blood to alveoli
2) this is why we give oxygen after the procedure

Question 8

chronic exposure pitfall

Answer 8

1) unknown what N2O does to system