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Anaesthesia NEET 2018 2f9203c1

What is mechanism of action of curonium drugs as muscle relaxant?

A
Persistently depolarizing at neuromuscular junction
B
Act competitively on Ach receptors blocking postsynaptically
C
Repetitive stimulation of Ach receptors on muscle end plate
D
Inhibiting the calcium channels on presynaptic membrane
High-Yield Explanation
Persistently depolarizing at neuromuscular junction - propey of succinylcholine depolarising eg : succinylcholine 1. MOA - persistent / prolonged depolarising of nicotinic cholinergic receptors 2. fasiculation seen 3. post operative myalgia 4. not reversed by neostigmine 5. train of four response not seen 6. TOF ratio (B/A = 1 ) 7. neuromuscular monitoring not done 8. no post tetanic facilitation non - depolarising 1. MOA - competitive antagonist 2. fasiculation not seen 3. no post operative myalgia 4. reversed by neostigmine 5. train of four response seen 6. TOF ratio (B/A< 1 ) 7. neuromuscular monitoring done 8. post tetanic facilitation seen

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