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WorksheetsSkeletal Muscle Relaxants Quiz
Total questions: 20
Worksheet time: 10mins
Skeletal muscle relaxants are primarily used to
Induce sleep
Relieve pain
Produce muscle relaxation during anesthesia
Treat epilepsy
Skeletal muscle relaxants are classified into
Depolarizing and non-depolarizing
Central and peripheral
Competitive and non-competitive
Both A and B
Succinylcholine is classified as
Non-depolarizing muscle relaxant
Competitive antagonist
Depolarizing muscle relaxant
Central muscle relaxant
Mechanism of action of succinylcholine is
Competitive blockade of ACh receptors
Persistent depolarization of neuromuscular end plate
Inhibition of acetylcholinesterase
Blockade of calcium channels
Succinylcholine initially causes
Flaccid paralysis
Fasciculations
Tetany
Spastic paralysis
Duration of action of succinylcholine is
Long acting
Intermediate acting
Ultra-short acting
Delayed onset
Succinylcholine is rapidly hydrolyzed by
Acetylcholinesterase
Plasma pseudocholinesterase
MAO
Hepatic enzymes
Primary clinical use of succinylcholine is
Routine surgery
Long-term paralysis
Rapid sequence intubation
Post-operative sedation
Major adverse effect of succinylcholine is
Hypotension
Hyperkalemia
Nephrotoxicity
Ototoxicity
Malignant hyperthermia associated with succinylcholine is due to release of
Potassium
Sodium
Calcium
Magnesium
Drug of choice for treatment of malignant hyperthermia is
Diazepam
Propranolol
Dantrolene
Atropine
Succinylcholine is contraindicated in
Emergency intubation
Short procedures
Burn patients
Elective surgery
Bradycardia following succinylcholine is due to
Histamine release
Beta blockade
Muscarinic stimulation
Alpha blockade
Non-depolarizing muscle relaxants act by
Depolarizing end plate
Blocking nicotinic receptors competitively
Inhibiting ACh release
Activating GABA receptors
Central muscle relaxants include
Baclofen
Succinylcholine
Atracurium
Pancuronium
Nasal decongestants act primarily by
Histamine blockade
Beta-2 agonism
Alpha-1 mediated vasoconstriction
Parasympathetic inhibition
Common nasal decongestant is
Salbutamol
Xylometazoline
Atropine
Propranolol
Adverse effect of prolonged nasal decongestant use is
Hypertension
Rebound congestion (rhinitis medicamentosa)
Sedation
Bronchospasm
Systemic adverse effect of nasal decongestants includes
Bradycardia
Hypotension
Hypertension and palpitations
Hypoglycemia
Nasal decongestants should be used cautiously in patients with
Asthma
Diabetes
Hypertension
Anemia
