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Local Anesthetics - quiz
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Perguntas do quiz (13)
1A weak acid becomes more than 50% un-ionized following IV injection (blood pH = 7.4). The pKa of this weak acid could be...
- A7.6
- B7.4
- C7.2
- D1.5
2When injected into the body, any of the local anesthetics used currently in clinical practice will be:
- Aless than 50% un-ionized
- Bmore than 50% un-ionized
- C50% un-ionized
- D100% un-ionized
3Sodium drug has pKa of 8.2. When injected into the blood, this drug will become:
- Aless than 50% un-ionized
- Bmore than 50% un-ionized
- C50% un-ionized
- D100% un-ionized
4What situation most facilitates accumulation of local anesthetic by the fetus?
- Amaternal acidosis and fetal acidosis
- Bmaternal acidosis and fetal alkalosis
- Cmaternal alkalosis and fetal alkalosis
- Dmaternal alkalosis and fetal acidosis
5Potency is determined by what property(ies) of a local anesthetic?
- ApKa
- Blipid solubility
- Cprotein binding
- Dboth lipid solubility and protein binding
6Speed of onset is determined by what property(ies) of a local anesthetic?
- ApKa
- Blipid solubility
- Cprotein binding
- Dboth lipid solubility and protein binding
7Duration of action is determined by what property(ies) of a local anesthetic?
- ApKa
- Blipid solubility
- Cprotein binding
- Dboth lipid solubility and protein binding
8Local anesthetics work on which segment(s) of the neuron?
- Aaxon only
- Bcell body and axon
- Caxon and nerve terminal
- Dcell body, axon and nerve terminal
9Conduction block occurs when the...
- Aionized form of the local anesthetic binds to the voltage-gated sodium channel outside the cell
- Bionized form of the local anesthetic binds to the voltage-gated sodium channel inside the cell
- Cun-ionized form of the local anesthetic binds to the voltage-gated sodium channel outside the cell
- Dun-ionized form of the local anesthetic binds to the voltage-gated sodium channel inside the cell
10You 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?
- A2.3
- B7.0
- C7.4
- D11.5
11Injection of local anesthetic at which of the following sites is most likely to result in systemic toxicity?
- Aepidural space
- Bparacervical tissue
- Cintercostal muscles
- Dbrachial plexus
12Methemoglobinemia can occur if what local anesthetic is used?
- ATetracaine
- BPrilocaine
- CRopivacaine
- DMepivacaine
13What condition most prevents passage of local anesthetic from fetus to mom?
- Amaternal alkalosis
- Bmaternal acidosis
- Cfetal alkalosis
- Dfetal acidosis
Informações
- Descrição
- Pharmacology - Bio 528
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- thomasina413
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- English
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