Local And General Anesthesia → Dentist

Q-1.Nitrous oxide that is used as anaesthetic agent has mechanism of action as?

Gasserian ganglion block

Block peripheral nerves

Reversible (indirect) depression of CNS

none of the above

Correct! Wrong!

Q-2.On administration of L.A in an area of infection, it is not effective because of?

Buffering action of L.A is decreased

Decreased concentration of changed cations at the site of injection

Decreased concentration of unchanged base forms at the site of injection

None

Correct! Wrong!

Q-3.Each of the following statements about local anesthesia is correct except;

Lignocaine causes cardiac dysarrythmias

Procaine is more toxic than lignocaine

Prilocaine and lignocaine are components of EMLA (eutectic mixture of local anesthesia)

Bupivacaine is given for obstetric epidural anesthesia

Correct! Wrong!

Q-4.Inferior alveolar nerve block alone can be used in;

Pulpotomy of 3rd molar

Apicoectomy of 3rd molar

Extraction of 1st molar

Root resection of 1st molar

Correct! Wrong!

Q-5.Longest acting local anaesthesia is;

Bupivacaine

Tetracaine

Lidocaine

Procaine

Correct! Wrong!

Q-6.Sedation by which of the following routes can be reversed most rapidly;

Oral

Inhalational

Intravenous

Intramuscular

Correct! Wrong!

Q-7.Lidocaine is an example of;

Acid type of local anaesthestic

Amide type of local anaesthestic

Ester type of local anaesthestic

Aldehyde type of local anaesthetic

Correct! Wrong!

Q-8.Which of the following is the best indication for propofol as an intravenous induction agent;

Neurosurgery

Day care surgery

Patients with coronary artery disease

In neonates

Correct! Wrong!

Q-9.Which of the following volatile anaesthestic agents should be preferred for induction of anaesthesia in children;

Enflurane

Isoflurane

Sevoflurane

Desflurane

Correct! Wrong!

Q-10.The role of sodium metabisulfite in local anaesthesia agent is;

Preservative

Fungicide

Reducing agent

Vasoconstrictor

Correct! Wrong!

Q-11.Hematoma formation during or immediately following a PSA block is most likely result of damage to?

Injection in pterygoid plexus

Injection in facial artery

Injection into internal maxillary artery

Injection in small capillaries and arterioles

Correct! Wrong!

Q-12.Concentration of Bupivacaine used in dentistry is?

0.5%

2.0%

4.0%

5.0%

Correct! Wrong!

Q-13.Most of the cases of hematoma occurs during which nerve block?

Inferior alveolar nerve block

Postero-superior nerve block

Infraorbital nerve block

Long buccal nerve block

Correct! Wrong!

Q-14.Topical anaesthesia used are effective up to the depth of?

0.5-1.0 mm

1.0-2.0 mm

2.0-3.0 mm

3.0-3.5 mm

Correct! Wrong!

Q-15.Maximum available and effective concentration of LA for topical use is;

2%

5%

10%

15%

Correct! Wrong!

Q-16.The role of sodium bisulphate in a LA solution is;

Reducing agent

Aesthetic agent

Vasoconstrictor

Preservative

Correct! Wrong!

Q-17.During the administration of posterior superior alveolar nerve block, the landmarks that guide the operator are anterior border of coronoid process and;

Anterior border of the ramus

Mandibular 2nd premolar

Pterygomandibular raphae

Palatine tonsils

Correct! Wrong!

Q-18.The sudden appearance of a 'Dumb-bell' swelling after the administration of PSA block is due to penetration in;

Maxillary artery

Pterygoid plexus of veins

Greater palatine artery

Sphenopalatine

Correct! Wrong!

Q-19.Following administration nitrous oxide will become saturated in blood and physically dissolved in serum fraction of blood within?

3-5 min

10 min

10-15 min

6-8 min

Correct! Wrong!

Q-20.The agent of choice to reverse status epilepticus induced by local anaesthetic is;

Oxygen

Diazepam

Epinephrine

Phenobarbital

Correct! Wrong!

Q-21.The longest acting local anaesthesia is;

Prilocaine

Lignocaine

Bupivacaine

Ropivacaine

Correct! Wrong!

Q-22.Nitrous oxide is a colourless, sweet smelling gas with a density of;

1.5

0.5

2.5

3.5

Correct! Wrong!

Q-23.Amide type local anaesthetics are metabolized in the;

Serum

Liver

Spleen

Kidneys

Correct! Wrong!

Q-24.A nerve is absolutely refractory during;

Depolarization

After depolarization

Hyperpolarization

Firing level only

Correct! Wrong!

Q-25.A nerve can be stimulated during relative refractory period by;

Stronger than normal stimuli

Sustained normal stimuli

Subthreshold stimuli

None of the above

Correct! Wrong!

Q-26.Local anaesthetic agents act by;

Increasing the rate of depolarization

Shortening the rate of repolarization

Decreasing the threshold potential

Increasing the threshold potential

Correct! Wrong!

Q-27.The local anaesthetic agent acts on;

Nerve membrane

Axoplasm

Epineurium

Perineurium

Correct! Wrong!

Q-28.The most acceptable theory which explains the actions of LA;

Surface charge theory

Calcium displacement theory

Membrane expansion theory

Receptor binding theory

Correct! Wrong!

Q-29.The ultimate action of binding the receptor by LA agent is brought about by its;

Hydrophilic component

Lipophilic component

Intermediary chain

RN of amide agents

Correct! Wrong!

Q-30.Amide group of local anaesthetic agents are dispensed as salts of strong acids because;

They are not lipid soluble but stable in air

They are not water soluble but stable in air

They are not water soluble and unstable in air

They are lipid soluble but stable in air

Correct! Wrong!

Q-31.In acidic medium (during pyogenic infections) local anaesthetics are less effective because;

More uncharged particles are released

Less uncharged particles are released

Less charged particles are released

None of the above

Correct! Wrong!

Q-32.Local anaesthetic agents with higher pka would have;

Shorter onset of action

Longer onset of action

No affect on onset of action

None of the above

Correct! Wrong!

Q-33.Which characteristic of a LA agent is responsible for its penetration into the nerve?

Lipid solubility

Water solubility

Its ionization

None of the above

Correct! Wrong!

Q-34.Addition of a vasoconstrictor to LA agents;

Increase alkalinity of the solution

Increases acidity of the solution

Has no effect on the pH

None of the above

Correct! Wrong!

Q-35.Sodium bisulfite has the following affect on the action of LA solution;

Slows down its onset of action

Decreases its duration of action

Increases its pH

Has no effect

Correct! Wrong!

Q-36.Increasing the concentration of LA from 2% to 5% would have;

Rapid onset and prolonged action

Onset would not be affected but action would have

No change on action

Rapid on set duration not affected

Correct! Wrong!

Q-37.The efficacy of benzocaine in inflamed area would be;

Decreased

Increased

Not altered

Prolonged

Correct! Wrong!

Q-38.The main barrier for diffusion of LA into the nerve is;

Epineurium

Perineurium

Endoneurium

Neural membrane

Correct! Wrong!

Q-39-Which fibres of the nerve are anaesthetised first;

Mantle fibres

Core fibres

Both are anaesthetised at the same time

None of the above

Correct! Wrong!

Q-40.The inadequate pulpal anaesthesia in presence of adequate soft tissue anaesthesia can be due to;

Faulty technique

Insufficient penetration of core fibres

Insufficient penetration of fasciculi

Insufficient penetration of mantle fibres

Correct! Wrong!

Q-41.Prolonged duration of action of drugs like etidocaine and bupivacaine can be attributed to their;

Increased lipid solubility

Increased water solubility

Increased protein binding

Vasoconstrictor action

Correct! Wrong!

Q-42.Tachyphylaxis occurs due to;

Increased dose of LA

Increased dose of vasoconstrictor

Repeated use of LA

Allergy to sodium metabisulfite

Correct! Wrong!

Q-43.Which of the following belongs to ester group of local anaesthetics?

Bupivacaine

Benzocaine

Etidocaine

Mepivacaine

Correct! Wrong!

Q-44.The only local anaesthetic with vasoconstrictor properties is;

Cocaine

Procaine

Benzocaine

Lidocaine

Correct! Wrong!

Q-45.Which of the following is not a ester local anaesthetic?

Propoxycaine

Procaine

Prilocaine

Piperocaine

Correct! Wrong!

Q-46.Which of the following local anaesthetics crosses the blood brain barrier;

Lidocaine

Etidocaine

Bupivacaine

All of the above

Correct! Wrong!

Q-47.All of the local anaesthetics cross the placenta;

Except mepivacaine

Statement is true

Statement is false

Except lignocaine

Correct! Wrong!

Q-48.Ester type local anaesthetics are metabolised in the;

Liver only

Kidney

Plasma

Lungs

Correct! Wrong!

Q-49.A patient who had a history of prolonged apnoea during administration of muscle relaxant (succinylacholine) should not be given?

Ester local anaesthetics

Amide local anaesthetics

Vasoconstrictor

Sodium bisulfite

Correct! Wrong!

Q-50.A patient complains of history of hepatitis one month ago should be preferably given which local anaesthetic agent?

Lignocaine

Bupivacaine

Procaine

Procainamide

Correct! Wrong!

Local And General Anesthesia

Q-1.Nitrous oxide that is used as anaesthetic agent has mechanism of action as?

Q-2.On administration of L.A in an area of infection, it is not effective because of?

Q-3.Each of the following statements about local anesthesia is correct except;

Q-4.Inferior alveolar nerve block alone can be used in;

Q-5.Longest acting local anaesthesia is;

Q-6.Sedation by which of the following routes can be reversed most rapidly;

Q-7.Lidocaine is an example of;

Q-8.Which of the following is the best indication for propofol as an intravenous induction agent;

Q-9.Which of the following volatile anaesthestic agents should be preferred for induction of anaesthesia in children;

Q-10.The role of sodium metabisulfite in local anaesthesia agent is;

Q-11.Hematoma formation during or immediately following a PSA block is most likely result of damage to?

Q-12.Concentration of Bupivacaine used in dentistry is?

Q-13.Most of the cases of hematoma occurs during which nerve block?

Q-14.Topical anaesthesia used are effective up to the depth of?

Q-15.Maximum available and effective concentration of LA for topical use is;

Q-16.The role of sodium bisulphate in a LA solution is;

Q-17.During the administration of posterior superior alveolar nerve block, the landmarks that guide the operator are anterior border of coronoid process and;

Q-18.The sudden appearance of a 'Dumb-bell' swelling after the administration of PSA block is due to penetration in;

Q-19.Following administration nitrous oxide will become saturated in blood and physically dissolved in serum fraction of blood within?

Q-20.The agent of choice to reverse status epilepticus induced by local anaesthetic is;

Q-21.The longest acting local anaesthesia is;

Q-22.Nitrous oxide is a colourless, sweet smelling gas with a density of;

Q-23.Amide type local anaesthetics are metabolized in the;

Q-24.A nerve is absolutely refractory during;

Q-25.A nerve can be stimulated during relative refractory period by;

Q-26.Local anaesthetic agents act by;

Q-27.The local anaesthetic agent acts on;

Q-28.The most acceptable theory which explains the actions of LA;

Q-29.The ultimate action of binding the receptor by LA agent is brought about by its;

Q-30.Amide group of local anaesthetic agents are dispensed as salts of strong acids because;

Q-31.In acidic medium (during pyogenic infections) local anaesthetics are less effective because;

Q-32.Local anaesthetic agents with higher pka would have;

Q-33.Which characteristic of a LA agent is responsible for its penetration into the nerve?

Q-34.Addition of a vasoconstrictor to LA agents;

Q-35.Sodium bisulfite has the following affect on the action of LA solution;

Q-36.Increasing the concentration of LA from 2% to 5% would have;

Q-37.The efficacy of benzocaine in inflamed area would be;

Q-38.The main barrier for diffusion of LA into the nerve is;

Q-39-Which fibres of the nerve are anaesthetised first;

Q-40.The inadequate pulpal anaesthesia in presence of adequate soft tissue anaesthesia can be due to;

Q-41.Prolonged duration of action of drugs like etidocaine and bupivacaine can be attributed to their;

Q-42.Tachyphylaxis occurs due to;

Q-43.Which of the following belongs to ester group of local anaesthetics?

Q-44.The only local anaesthetic with vasoconstrictor properties is;

Q-45.Which of the following is not a ester local anaesthetic?

Q-46.Which of the following local anaesthetics crosses the blood brain barrier;

Q-47.All of the local anaesthetics cross the placenta;

Q-48.Ester type local anaesthetics are metabolised in the;

Q-49.A patient who had a history of prolonged apnoea during administration of muscle relaxant (succinylacholine) should not be given?

Q-50.A patient complains of history of hepatitis one month ago should be preferably given which local anaesthetic agent?

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