Anaesthetics Tutorial Flashcards
How long to fast for?
6hours
clear fluids
crico pressure for what?
may occlude oesphagus
why paralyze and muscle relaxants?
ease of intubation
for delicate procedures like neurosurg
Aiway assessment?
Dentition: crowding Open mouth: 3 cm needed Mandibular protrusion Mallenpatti thyromental junction
desirables in Anaesthesia
asleep amnesia analgesia wakeful (day of surgery, neurosurg) anxiolysis muscle relaxation less PONV airway aspiration risk temperature mx
advantage of plexus and nerve blocks to general?
post-operative analgesia
to kinds of neuraxial blocks?
spinal
epidural
where does a spinal block go?
sub-arachnoid space
epidural get good coverage?
Nope: about 3-4 above and below
how much fluid needed for spinal block?
only 2-3 mls because it circulates in the CSF
how much fluid needed for epidural block?
10-15ml to get appropriate spread
why epidural for labour?
duration is longer due to infusion
post-op analgesia
what kind of block for caeserian section?
spinal usually
3 things to achieve General Anaesthesia?
hypnosis
analgesia
muscle relaxation
2 kinds of general anaesthesia?
- spontaneous ventilation
2. muscle relaxation (absolute - including diaphragm)
what kind of airway device for spontaneously ventilation?
laryngeal mask
what kind of airway device for muscle relaxant GA?
intubation
why a cuff for the intubation?
prevent aspiration
who is at risk for aspiration in anaesthesia?
non-fasting
trauma/emerg
GORD
preg for >20 weeks to >6weeks post partum
why preg increase GORD?
increased intrabdominal pressure
progesterone relaxes esophageal sphincter
3 phases of anaesthesia:
Induction
maintenance
reversal/emergence
drugs for induction?
propofol
benzos: midazolan
fentanyl
drugs for maintenance?
sevofluorane
morphine for analgesia
fentanyl for what in induction?
ablate the sympathetic response for intubation process
