Lecture 28: Peri-Anesthesia Monitoring and Complications-1 Flashcards
What is the % anesthetic related deaths in dogs with ASA 1-2 and 3-5
ASA 1-2: 0.05%
ASA 3-5: 1.33%
What is % anesthetic related death in cats with ASA 1-2 and 3-5
ASA 1-2: 0.11%
ASA 3-5: 1.4%
What is % anesthetic related death in horses for elective cases and colics
Elective cases: 0.63-0.96%
Colics: 1.6-11.7%
What are some important components for patient preparation for anesthesia
Fasting, stabilization, hydration, medications to give or not to give, understanding patients status
What is the most important part of anesthesia
Monitoring
When during anesthesia do the highest mortality rates occur (2)
- During maintenance
- First 3hrs post anesthesia
What is the key to maintaining good anesthetic depth
Balance between degree of stimulation and pain management provided
What is the preferred depth of anesthesia when good analgesia is provided
Lighter medium
What is the goal of maintaining a good depth of anesthesia
- Comfortable- not painful and stressed
- Immobilized and hypnotized
What is anesthesia
A drug induced loss of consciousness during which patients are not arousable even by painful stimulation
What are the 4 stages of anesthesia
- Stage 1- disorientation
- Stage 2- excitation/delirium
- Surgical anesthesia with subplanes 1(light), 2 (medium), 3 (deep)
- Stage IV- extreme CNS depression
What are the preferred stages for surgical anesthesia
Stage 3- substages 1-2
Describe the reaction to surgical stimulus, jaw tone, palpebral reflex, eye position, HR and RR during stage 3 light anesthesia
- +/- reaction to sx stimuli
- Slightly tensed jaw
- Present palpebral
- Eyes central
- Increase HR and RR
Describe the reaction to surgical stimulus, jaw tone, palpebral reflex, eye position, HR and RR during stage 3 medium anesthesia
- Absent reaction to sx stimuli
- Relaxed jaw
- Absent palpebral
- Eyes medioventral
- Decrease HR and RR
Where are the eyes of dogs, cats, ruminants and pigs during stage 3, plane 2 (medium)
Medioventral
Where are horses eyes in stage 3/plane 2 (medium) depth
Stay center, may “rove”
Indicate the anesthetic depth in A-F
A. Awake
B. Light (III-1)
C. Lighter medium (III-1.5)
D. Medium III-2
E. Deep III-3
F. IV- too deep- central and pupils dilated
What sign can be seen in horses eyes that are too light
Nystagmus
If you see nystagmus in anesthetized horse what do you do
Given injectable anesthetic immediately
Are horses eyes open or closed during SIII-P2 or deeper
Wide open
Why do you not keep touching eye repeatedly to assess palpebral reflex
Desensitization
At what stage should palpebral reflex disappear
Stage III-plane II
T of F: you should always keep corneal reflex present
True
At what stage does corneal reflex disappear
Stage IV- too deep
