93. Types of anaesthesia in swine Flashcards
Types of Anaesthesia?
General
Epidural
Local
General Anaesthetia?
General
- Inhalation
- IM
o Single or multiple injections
• IV
o Single injection
§ Auricular vessel
§ Jugular vein
§ Vena cava cranialis
o Slow drop infusion
§ Auricular vessels
Epidural and local anaesthetia?
Epidural
• Lumbosacral
Local
- Intratesticular
- Other
Approach to sedation and general anaesthetia?
Approach to sedation and general anaesthesia
• Withhold food for at least 6 hours
o 12 hours for abdominal surgery
- Don’t withhold water
- Minimize stress
o Malignant hyperthermia
• Restrain
o Pig board and snare
• Hot condition
o Dark pig = heatstroke
o Pink pig = sunburn
• Cold condition
o Hypothermia
• Protect eyes from dust and sunlight
Inhalational Anaesthetia?
Inhalational Anaesthesia
Difficult intubation
- Laryngospasm is common
- Narrow glottis
- Long soft palate
- Wide opening of the mouth
- Sharp teeth
- Interesting laryngeal anatomy
Im injection
IM
Accurate IM is difficult
- Neck muscle
- Triceps
- Epaxial lumbar muscle
- Gluteal
- Quadriceps
Intra-fat (IF) injection
• More common
Poor response
Dose was insufficient or delivered into fat?
IV injection?
V
• Auricular vessels (ear vein)
o Not easy to locate in small-ear breeds
o Gilts, sows, boars
• Jugular vein
o From 30kg + weight
• Vena cava cranialis
o Piglets from 2kg to 30kg weight and for adults
o Injection on the right side
o Anterior vena cava on the left
§ N. vagus on the left
Lumbosacral epidural?
Lumbosacral Epidural
- Castration, obstetrical or perineal surgeries
- Sedation is needed
- Like in dogs but in very large and fatty pig is difficult
- Patellae- vertical line- line crosses the spin- 2-3cm caudal lumbosacral space
- Local (skin) infiltration is needed
- 5-10cm epidural needle
- 5 or 6 lumbal vertebrae, between the last 2 vertebrae
- 50kg pig, 10ml 2% lidocaine, duration of the block is 1-2 hours
- Combination
o Xylazine injection 1mg/kg + 10mg 2% lidocaine= 10ml
§ 6 hours duration
Monitoring?
Monitoring
- Jaw tone
- General muscle tone
- Ocular position/ reflexes
- Heart rate
- MM colour
- Skin temperature
