Anesthsia

Question 1

Anesthesia

Answer 1

Total loss of sensation in part or entire body

Anesthetic agents
• produce loss of consciousness & induce absence of motor response to noxious stimuli

Question 2

Basal anesthesia

Answer 2

Light level of general anesthesia produced by

pre-anesthetic agents

Question 3

General anesthesia

Answer 3

Loss of consciousness & sensation thru-out the body.

• CONTROLLED & REVERSIBLE CNS depression

Question 4

Surgical anesthesia

Answer 4

Loss of consciousness & sedation w/ sufficient muscle relaxation & analgesia to allow surgery to be performed w/o pain

Question 5

Dissociative anesthesia

Answer 5

CNS state characterized by muscular rigidity, peripheral analgesia & altered consciousness

Question 6

Principles of anesthesia vs analgesia

Answer 6

Anesthesia
• should coincide w/ expected duration of procedure

Analgesia
• should coincide w/ expected duration & intensity of Post-op pain generated by procedure

Question 7

What factors help decide an anesthetic regimen?

Answer 7

1. type of procedure
2. Duration of procedure
3. amt & type of pain
4. Animal’s characteristics
5. Drug properties

Question 8

How are anesthetics dosed?

Answer 8

No predetermined anesthetic dose 
  • first estimate based on BW & age
• give drug until effect (may be delayed)
• calculated based on the metabolic size
• 
Side effects
• Monitor & maintain body temp! 
• rehydrate (IV)

Question 9

Goal of pre-anesthesia

Answer 9

• Minimize anxiety/excitement
• Ease transition btwn Stage 1 & Stage 3 
        - stage 2 = delirium
• ↓ amt of anesthetic agent
• prevent vomiting

Question 10

Pre-anesthetic drug classes

Answer 10

1. Anticholinergic
2. Opioids
   
   • ↓ dose of anesthetic needed
   • induces smooth recovery
   • PAIN relief
3. Tranquilizer/sedative
   - Need time to work!!
   - ↓ dose of anesthetic needed -w/ ↓ side effects

Question 11

Injectable anesthetics

Answer 11

Given IV
- except for small rodents - IP w/ diluted drug

• Barbiturates
• Non-barbiturates
• Dissociatives

Question 12

Inhalation or volatile anesthetics

Answer 12

• used for long & major procedures
• Requires scavenger system, nose cone, or endotracheal tube
• calibrated vaporizer if LA’s – prevent overdose

** cannot contact anesthetic in liquid form!!

Question 13

Stages of General anesthesia

Answer 13

Stage 1: (analgesia)
• Loss of pain w/o loss of consciousness

Stage 2: (delirium)
• Dangerous period

Stage 3: (Sx stage(
• Plane 1: light sx 
• Plane 2: moderate sx
• Plane 3: Deep sx
• Plane 4: Excessive Sx - Intercostal paralysis, short gasping inspiration

Stage 4: ( medullary depression)
• respiratory paralysis to circulatory failure

Question 14

When does recovery period end w/ anesthesia

Answer 14

when animal is fully awake