187. The volatility of an anesthetic agent is directly proportional to lowering the flow
in the portal vein. Portal flow is
maximally reduced by
a) Ether
b) Halothane
c) Isoflurane
d) Enflurane
188. A young boy has sickle cell trait. which of the following anaesthesia is contraindicated?
a) IV regional anaesthesia
b) Brachial plexus block by supraclavicular approach
c) Brachial plexus block by infraclavicular approach
d) Brachial plexus block by axillary approach
189. Methemoglobinemia caused by
a) Procaine
b) Prilocaine
c) Bupivacaine
d) Lignocaine
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