Specialities Flashcards
Venous blood gas measures what? When should it be taken?
Lactate; consider with suspected sepsis
Below what saturations should oxygen be given?
94%
Systolic BP value of below what is an indication for fluid challenge with crystalloid?
90mmHg
How do general anaesthetics work at neuron level?
Suppressing, via opening chloride channels leading to hyperpolarisation
What effect do general anaesthetic agents have on sympathetic nerve activity?
Decreases
General anaesthetic agents have what effect on tidal volume?
Decrease
Propofol and thiopentone are administered via what method?
IV
Halothane and desflurane are administered via what method?
Inhaled
Low MAC of an inhaled general anaesthetic agent indicates what level of potency?
High
Is fentanyl long or short acting?
Short
Morphine and oxycodone are long or short acting?
Long
Lidocaine is used as what type of anaesthetic agent?
Local
How do local anaesthetic agents work at neuronal level?
Block sodium channels, hence preventing action potentials from propagating
Oral numbness and tingling, visual disturbance and drowsiness are signs of what toxicity?
Local anaesthetic toxicity
Chronic pain is described as pain lasting longer than?
3 months
The gate theory of pain utilises what type of neurones as inhibition of the nociceptive signal?
A alpha and A beta fibres
Amitriptyline is good for what type of pain?
Neuropathic
Amitriptyline can have what kind of side effects?
Anti-cholinergic
- glaucoma, urinary retention
Urinary retention is a side effect of what neuropathic pain medication?
Amitriptyline (TCA)