Exam 1: Lecture 5: Monitoring Anesthetic Depth Flashcards
What is general anesthesia
- both loss of consciousness and sensation
- include muscle relaxation, analgesia, suppression of stress response and hypnosis
- Reversible process
- May be produced by 1 drug or many
Which anesthesia level is described? If there is a plane also indicate that.
+ reaction to surgical stimulation
+ palpebral reflex
Normal to dilated eye and pupil reflex
Stage I
Which anesthesia level is described? If there is a plane also indicate that.
normal to decreased jaw tone
normal to increased HR
normal to increased RR
Stage I
Which anesthesia level is described? If there is a plane also indicate that.
+ reaction to surgical stimulation
+ reaction to palpebral relfex
Decreased pupil size
Stage II
Which anesthesia level is described? If there is a plane also indicate that.
tense jaw tone
increased HR
increased RR
Stage II
Which anesthesia level is described? If there is a plane also indicate that.
+- reaction to surgical stimulation
+ palpebral reflex
third eyelid elevated
Stage III
Plane I
Which anesthesia level is described? If there is a plane also indicate that.
Slight decrease in jaw tone
normal to increased HR
normal to increased RR
Stage III
Plane I
Which anesthesia level is described? If there is a plane also indicate that.
- reaction to surgical stimulation
- palpebral reflex
third eyelid elevated
Stage III
Plane 2, 3 and 4
Which anesthesia level is described? If there is a plane also indicate that.
Mild decrease in jaw tone
normal to decreased HR
normal to decreased RR
Stage III
Plane 2 and 3
Which anesthesia level is described? If there is a plane also indicate that.
large decrease in jaw tone
decrease in HR
Abdominal slow / shallow
Stage III
Plane 4
Which anesthesia level is described? If there is a plane also indicate that.
Dilated / large pupils
Apnea
Cardiac arrest
Stage IV
Which anesthesia level is described? If there is a plane also indicate that.
- defined as the time from the start of administration of induction drugs until loss of consciousness
- stage of voluntary movement
- able to initially turn or lift head without support
Stage 1
Which anesthesia level is described? If there is a plane also indicate that.
- Some analegesia present
- Progressive ataxia = lateral recumbancy
- If patient is excited (little premed effect) = struggle , breath holding, increased heart rate, and pupil dilation due to epinephrine release, defecation, urination and salvation
- Most variable stage
Stage 1
Which anesthesia level is described? If there is a plane also indicate that.
- Struggling or exaggerated reaction to stimuli
- vomiting or regurgation can occur / salivation
- Laryngospasm
- Dilated pupils / nystagmus (common in horses)
- increased ororregular respiratory pattern . breath holding
Stage II
Which anesthesia level is described? If there is a plane also indicate that.
- Increased heart rate / arrhythmias due to catecholamine release
- Active palpebral reflex
- tight anal sphincter
- jaw tone present
- may vocalize
Stage 2
Which anesthesia level is described? If there is a plane also indicate that.
- can be characterized as stage of delirium and involuntary movement and lasts from loss of consciousness to onset or regular breathing pattern
Stage 2
Which anesthesia level is described? If there is a plane also indicate that.
- Stage of surgical anesthesia
Stage 3
Which anesthesia level is described? If there is a plane also indicate that.
- Stage of surgical anesthesia due to level of unconsciousness with progressive depression of reflexes, muscle relaxation and slow, regular breathing patterns
- Vomiting (by plane I) and Swallowing (by plane 2) reflexes abloshed
- Loss of Jaw tone
Stage 3
Which anesthesia level is described? If there is a plane also indicate that.
- May also be called a light plane of anesthesia
- persists until eyeballs movement stops
- Minimally invasive / painful procedure (ex: biopsy, would closure)
Stage 3
Plane 1
Which anesthesia level is described? If there is a plane also indicate that.
- May also be called a medium plane of anesthesia
- characterized by progressive intercostal paralysis
- respiration and heart rate stabilized
- Sluggish palpebral reflex
Stage III
Plane 2
Which anesthesia level is described? If there is a plane also indicate that.
- Strong corneal reflex
- Adequate muscle relaxation and analgesia
- Abolished laryngeal reflexes
Stage III
Plane 2
Which anesthesia level is described? If there is a plane also indicate that.
- Most surgical procedures performed at this plane (light plane of surgical anesthesia)
Stage III
Plane 2
Which anesthesia level is described? If there is a plane also indicate that.
- May also be called deep plane of anesthesia or deep plane of surgical anesthesia
Stage III
Plane 3
Which anesthesia level is described? If there is a plane also indicate that.
- Decreased HR
- Slow, shallow abdominal breathing pattern (Diaphragmatic Respiration)
- No jaw tone
- No reaction to surgical stimulation, profound muscle relaxation
- Pupil progressively dilated and central
Stage 3
Plane 3
