Anaesthesia (01-22) Flashcards
a state in which there is lack of sensation
anaesthesia
a state of unconsciousness produced by anaesthetic agents, with absence of pain sensation over the entire body
general anaesthesia
lack of sensation caused by interrupting the sensory nerve conduction of any region of the body
regional anaesthesia
this is an insensibility to pain without loss of consciousness
analgesia
a state of reduced anxiety
anxiolysis
this is a state of reduced irritability or excitement
sedation
this is a state of stupor or unconsciousness
narcosis
this is an artificially induced state of passivity
hypnosis
a male pig can be castrated without anaesthesia up to this age
7 days
a male calf can be castrated without anaesthesia up to this age
2 months (7 days with rubber ring)
a male lamb can be castrated without anaesthesia up to this age
7 days
this feature of an ideal anaesthetic means the drug does what it is meant to do
efficacy
this feature of an ideal anaesthetic means the drug does the same thing on every occasion and in every animal
predictability
this feature of an ideal anaesthetic means that the ease of administration is desirable
convenience
a balanced anaesthesia should have this triad of functions
narcosis, analgesia, muscle relaxation
name the 5 phases of anaesthesia
- pre-operative period
- Pre-anaesthetic medication
- induction
- maintenance
- recovery
in this phase of anaesthesia: animals are examined, drugs/fluids given to control pre-existing medical conditions, anaesthetic equipment prepared for use
pre-operative period
in this phase of anaesthesia: drugs are used to sedate the animal to make it less anxious, relieve pain, and decrease drug doses required for subsequent events
pre-anaesthetic medication (premedication)
in this phase of anaesthesia: the animal is rendered unconscious with agents
induction
in this phase of anaesthesia: unconsciousness is maintained
maintenance
in this phase of anaesthesia: drug administration ceases and the animal is allowed to regain consciousness
recovery
what is the moral/ethical reason for anaesthesia
prevent suffering caused by stress and/or pain
what is technical/practical reasons for anaesthesia?
prevent patient moving during surgery, reduce human risk
what are 6 features of an ideal anaesthetic?
- safety
- efficacy
- predictability
- convenience
- cost
- legality