Principles of anaesthesia Flashcards
How can we administer analgesia?
Topical Infiltrative Conductive Epidural Subarachnoid
What is the train of anaesthesia?
Hypnosis (sleep)
Anti-noiception
Muscle relaxation
How can we bring about muscle relaxation?
- From the same agent producing hypnosis or
- From a centrally acting muscle relaxant - diazepam or
- From a specific neuromuscular junction blocking agent – curare
Define Tranquilisation
relief of anxiety
Define Sedation
central depression, drowsiness
Define Narcosis
drug induced sleep produced by narcotics - opium like drugs
Define Dissociative anaesthesia
induced by drugs such as ketamine that dissociate the thalamo-cortical and limbic systems where they look more awake than they should
Why are combinations of agents used?
One agent can be used to produce induction and all 3 desired effects of the triad (unable to perceive painful stimuli, relaxed muscles, unconsciousness)
– Eg isoflurane, sevoflurane
But usually injectable agents are used in combination so that the animal doesn’t crash