MCQS 352-354:A fireman is exposed to toxic fumes of hydrofluoric acid




A 5 month old infant with recurrent flexor rapid sudden flexion and extension of the extremities. The spasms were bilateral and symmetric, and appeared in clusters, also involving the head and trunk. On examination he was noted to have arrested psychomotor development. His EEG pattern revelaed high-voltage slow waves, irregularly interspersed with spikes and sharp waves occurring randomly in all cortical areas. These features are characteristic of a

a) Atonic seizure
b) Jacksonian seizure
c) simple partial seizure
d) West's syndrome
e) Petit mal seizure
f) Panic attack
g) Myoclonic seizure
h) Grand mal seizure
i) mesial temporal lobe epilepsy
j) Febrile convulsion



A fireman is exposed to toxic fumes of hydrofluoric acid. He becomes rapidly confused and the paramedical team transfers the workman immediately to hospital. Here is is found to have a prolonged QT interval on a electrocardiogram. What is the next best treatment of choice?

a) 10% calcium gluconate administered IV
b) sodium bicarbonate 1 mEq/kg IV
c) oral sodium bicarbonate
d) hypertonic intravenous crystalloid fluid
e) hypotonic intravenous crystalloid fluid
f) hydrotherapy
g) humidified oxygen
h) non-humidified oxygen
i) IV methylene blue
j) oral charcoal


which best describes the term "prevalence"

a) pretest probability that disease present
b) probability test positive if disease present
c) pretest probability that disease absent
d) probability test positive if disease absent
e) probability disease absent when test negative
f) the incidence rate
g) the probability of disease in a patient being tested based on disease prevalence and test performance
h) the Test Performance Measure
i) the likelihood ratio for a positive test result
j) the likelihood ratio for a negative test result


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