General Anesthetics Flashcards

1
Q

What is the mechanism of action of Anaesthetics?

A

Main site is reticular formation (maintains consciousness)
Other include
1. GABA(A) receptor to inhibit GABA
2. Inhibit nicotinic receptors
3. Antagonism of excitatory glutamic acid on N-methyl-D-aspartate receptor
4. Strychnine-sensitive glycine receptor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What’s the relationship between onset of anesthesia and partial pressure of gas?

A

Direct. The higher the partial pressure, the faster the onset of anesthesia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What’s the relationship between blood solubility and onset of anesthesia?

A

Indirect. The greater the solubility in blood, the slower the onset of anesthesia.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Relation between onset of anesthesia and ventilation?

A

Direct. The greater the ventilation, the greater the onset of anaesthesia.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Relation between pulmonary blood flow and onset of anesthesia?

A

Indirect. The higher the pulmonary blood flow, the slower the onset of anaesthesia.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The rate of recovery from anesthesia is greater in low or high blood gas solubility?

A

Low blood gas solubility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What’s the relationship between MAC and potency

A

Indirect. The greater the mac, the less potent.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which inhalation Anesthetics decrease cardiac output?

A
  1. Enflurane
  2. Halothane
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which inhaled anesthetics cause peripheral vasodilation?

A
  1. Sevoflurane
  2. Desflurane
  3. Isoflurane
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which anesthetic is a pulmonary irritant and may cause bronchospasm?

A

Desflurane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Toxicities of inhaled anesthetics?

A
  1. Hepatitis
  2. Renal insufficiency
  3. Megaloblastic anemia
  4. Milagnant hyperthermia
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What drug is used to treat malignant hyperthermia?

A

Dantrolene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the name of the prodrug of propofol? Which enzyme converts it to propofol?

A
  1. Fospropofol
  2. Alkaline phosphatase
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Respiratory depression caused by opioids can be reversed by what?

A

Naloxone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is etomidate?

A

Imidazole derivative with minimal change in cardiac and respiratory rate and has a short duration of action.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Prolonged administration of etomidate can lead to suppression of what?

A

Adrenal suppression

17
Q

Name an alpha 2- adrenergic agonist used for general anesthesia that decreases dosage requirement for both inhaled and IV anesthesia.

A

Dexmedetomidine

18
Q

Name the barbiturates used as anesthetics.

A

Thiopental
Methohexital
Thioamylal

19
Q

Which benzodiazepine is used as an anesthetic?

20
Q

What is the mechanism of action if dissociative anesthetic, ketamine?

A

Blocks excitation by gultamate at NMDA receptors.

21
Q

Name an anesthetic drug from the subclass imidazole.

22
Q

Which opioids can be used for general anesthesia?

A
  1. Fentanyl
  2. Alfentanil
  3. Femifentanil
  4. Morphine
23
Q

Which phenols are used for general anaesthesia?

A
  1. Propofol
  2. Fosoprpofol
24
Q

Thiopentone sodium is used for what?

A
  1. Anti convulsants
  2. Anesthesia
  3. Narcoanalysis in psychiatry
25
What are the adverse effects of thiopentone sodium?
1. Acute intermittent porphyria 2. Gangrene of the arm 3. Laryngospasm
26
Uses of ketamine in preanesthetic medication?
1. Relieve pre and post operative pain 2. Reduce anxiety 3. Reduce saliva, to prevent vagal bradycardia 4. Prevent vomiting 5. Prevent stress ulcers