Mcq Subject: Anaesthesia
Mechanism of action of curare is ?
A. Reducing end plate potential
B. Reducing presynaptic potential
C. Inhibits K+ channels
D. Inhibits Na+ channels
View DescriptionLaryngeal mask is contraindicated in all except?
A. Oral tumor
B. Ocular surgeries
C. Massive maxillofacial injury
D. High risk of aspiration
View DescriptionMuscle most resistant to non depolarizing block is
A. Intercostal
B. Abdominal
C. Diaphragm
D. Adductors.
View DescriptionWith regard to ketamine, all of the following are true except –
A. It is a direct myocardial depressant
B. Emergence phenomenon are more likely if anticholinergic premedication is used
C. It may induce cardiac dysarythmias in patients receiving tricyclic antidepressants
D. Has no effect on intracranial pressure
View DescriptionWhich of the following drug is used for hypotensive anaesthesia:
A. Isoflurane
B. Nitroglycerin
C. Both 1 & 2
D. Dantrolene
View DescriptionA 27-year-old man was assaulted and stabbed on the left side of the chest between the areola and the sternum. He is hemodynamically unstable with jugular venous distention, distant hea sounds, and hypotension. Which of the following findings would be consistent with a diagnosis of hemodynamically significant cardiac tamponade?
A. More than a 10 mm Hg decrease in systolic blood pressure at the end of the expiratory phase of respiration
B. Decreased right atrial pressures on Swan-Ganz monitoring
C. Equalization of pressures across the 4 chambers on Swan-Ganz monitoring
D. Compression of the left ventricle on echocardiography
View DescriptionConcerning pulse oximetry true is
A. Oxyhemoglobin and deoxyhemoglobin light absorption is equal at the isobestic point of 660nm
B. Measurements are accurate in the presence of high levels of bilirubin
C. Measurements are accurate in presence of carboxyhaemoglobin
D. Measurements are accurate in presence of pigmented skin.
View DescriptionIdeal anaesthetic circuit for spontaneously breathing pediatric patient is:-
A. Magills circuit
B. Mapleson D
C. Jackson rees circuit
D. Bains circuit
View DescriptionPhase I blocker is:
A. Depolarization blockade
B. Desensitization blockade
C. Both
D. Neither
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