MCQ 3 Flashcards
An asthmatic patient develops acute bronchospasm at the
end of an operation for the repair of an umbilical hernia.
The possible causes include:
A. use of neostigmine to reverse the neuromuscular blockade
B. a light level of anaesthesia
C. irritation of the respiratory tree by the tracheal tube
D. use of isoflurane during the anaesthetic
E. inclusion of morphine in the preoperative medication
- During anaesthesia a patient with Parkinson’s disease
taking levodopa should not receive:
A. enflurane
B. fentanyl
C. morphine
D. droperidol
E. nitrous oxide
- A. false B. false C. false D. true E. false
The treatment for Parkinson’s disease is aimed at restoring the
dopaminergic/cholinergic balance. The levodopa increases
brain levels of dopamine (dopamine itself does not cross the
blood-brain barrier), by the conversion of levodopa to dopamine
outside the CNS with the resultant side effects which are
prevented by the current administration of carbidopa or
benserazide. These inhibit dopa carboxylase peripherally, but do
not themselves cross into the brain.
(Phenothiazines and butarylphenones) Droperidol antagonises
central dopamine (D2) receptors at the CTZ so it should not be used
After the onset of one lung anaesthesia pulmonary
vasoconstriction in the non-dependant lung is
enhanced by:
A. a low alveolar oxygen tension in that lung
B. inhalational anaesthetic agents
C. intravenous anaesthetic agents
D. metabolic alkalosis
E. a constant intravenous sodium nitroprusside infusion
- A. true B. false C. false D. false E. false
In one-lung anaesthesia, the inhibitory factors to pulmonary
vasoconstriction include:
• Extremes of pulmonary artery pressure
• Hypocapnia
• Low mixed venous oxygen tension
• Vasodilator therapy
• Pulmonary infection
• Possibly volatile anaesthetics
Reliable indicators of tissue oxygenation include the
following:
A. base deficit in arterial blood
B. pH of arterial blood
C. PO2 of arterial blood
