Flashcards in Injectable Anaesthetics Deck (16)
What are the 3 things general anaesthesia is characterised by?
- Lack of pain
- Lack of memory
- Relatively depressed reflex responses
Explain balanced anaesthesia
patient pre-medicated with sedative and analgesic, given analgesic during and after surgery, maintained on inhalation agent to provide narcosis
What are the two types of anaesthetics?
Name 2 reasons to use injectable anaesthetics?
- Induction prior to inhalational anaesthetics
- Sole agent for short duration procedures
- Supplement inhalational agents
- Suppress central nervous system stimulation in certain conditions
Name 2 routes of administration for injectable anaesthetics?
Name 2 things you should consider when choosing an admin route
need for restraint
pain on injection
What does TIVA stand for
total intravenous anaesthesia
What is TIVA an alternative to?
Name 2 benefits of TIVA
-Avoids side effects of inhalational agents
-Useful when inhalational delivery would compromise access for surgery
What impacts the effects of I/V anaesthetic agents
concentration of plasma
When will unconsciousness occur
when brain reaches a critical concentration of the drug
When will consciousness begin to return
Drug level falls below critical level and less well-perfused organs start to take up the drug
What causes a variation in duration of action by injectable anaesthetics
- redistribution o drug from brain to less well-perfused tissues vary depending on:
1. Cardiac output
2. the mass of tissues available
Where are injectable anaesthetics metabolised
What sites can be used for I/M administration?
- Lumbo-dorsal muscles
- Lateral Neck