400577
Descrição
Quiz por thomasina413, atualizado more than 1 year ago
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Criado por thomasina413
quase 11 anos atrás
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Questão 1
Questão
A weak acid becomes more than 50% un-ionized following IV injection (blood pH = 7.4). The pKa of this weak acid could be...
Responda
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7.6
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7.4
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7.2
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1.5
Questão 2
Questão
When injected into the body, any of the local anesthetics used currently in clinical practice will be:
Responda
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less than 50% un-ionized
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more than 50% un-ionized
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50% un-ionized
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100% un-ionized
Questão 3
Questão
Sodium drug has pKa of 8.2. When injected into the blood, this drug will become:
Responda
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less than 50% un-ionized
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more than 50% un-ionized
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50% un-ionized
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100% un-ionized
Questão 4
Questão
What situation most facilitates accumulation of local anesthetic by the fetus?
Responda
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maternal acidosis and fetal acidosis
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maternal acidosis and fetal alkalosis
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maternal alkalosis and fetal alkalosis
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maternal alkalosis and fetal acidosis
Questão 5
Questão
Potency is determined by what property(ies) of a local anesthetic?
Responda
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pKa
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lipid solubility
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protein binding
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both lipid solubility and protein binding
Questão 6
Questão
Speed of onset is determined by what property(ies) of a local anesthetic?
Responda
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pKa
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lipid solubility
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protein binding
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both lipid solubility and protein binding
Questão 7
Questão
Duration of action is determined by what property(ies) of a local anesthetic?
Responda
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pKa
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lipid solubility
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protein binding
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both lipid solubility and protein binding
Questão 8
Questão
Local anesthetics work on which segment(s) of the neuron?
Responda
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axon only
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cell body and axon
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axon and nerve terminal
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cell body, axon and nerve terminal
Questão 9
Questão
Conduction block occurs when the...
Responda
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ionized form of the local anesthetic binds to the voltage-gated sodium channel outside the cell
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ionized form of the local anesthetic binds to the voltage-gated sodium channel inside the cell
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un-ionized form of the local anesthetic binds to the voltage-gated sodium channel outside the cell
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un-ionized form of the local anesthetic binds to the voltage-gated sodium channel inside the cell
Questão 10
Questão
You can make your own local anesthetic. If you want the local anesthetic to have a fast onset, you will want to have the local anesthetic have what pKa?
Responda
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2.3
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7.0
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7.4
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11.5
Questão 11
Questão
Injection of local anesthetic at which of the following sites is most likely to result in systemic toxicity?
Responda
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epidural space
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paracervical tissue
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intercostal muscles
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brachial plexus
Questão 12
Questão
Methemoglobinemia can occur if what local anesthetic is used?
Responda
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Tetracaine
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Prilocaine
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Ropivacaine
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Mepivacaine
Questão 13
Questão
What condition most prevents passage of local anesthetic from fetus to mom?
Responda
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maternal alkalosis
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maternal acidosis
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fetal alkalosis
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fetal acidosis
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