Here is a 20-question anesthesiology MCQ quiz. Good luck!

1. Which of the following inhalational agents has the LOWEST blood/gas partition coefficient?

A) Halothane B) Isoflurane C) Desflurane D) Sevoflurane

2. The MAC (Minimum Alveolar Concentration) of an inhalational anesthetic is defined as the concentration at which:

A) 50% of patients do not move in response to a surgical incision B) 95% of patients are unconscious C) 99% of patients do not respond to verbal commands D) 50% of patients show no autonomic response to intubation

3. Succinylcholine exerts its neuromuscular blocking effect by:

A) Competitively antagonizing acetylcholine at the nicotinic receptor B) Persistently depolarizing the motor end plate C) Inhibiting acetylcholinesterase at the neuromuscular junction D) Blocking voltage-gated calcium channels at the nerve terminal

4. Which local anesthetic has the LONGEST duration of action?

A) Lidocaine B) Mepivacaine C) Bupivacaine D) Chloroprocaine

5. Rocuronium's neuromuscular blockade can be rapidly reversed using:

A) Neostigmine B) Sugammadex C) Pyridostigmine D) Edrophonium

6. The triad of general anesthesia consists of:

A) Analgesia, sedation, and muscle relaxation B) Amnesia, unconsciousness, and anxiolysis C) Hypnosis, analgesia, and muscle relaxation D) Induction, maintenance, and emergence

7. A patient develops masseter muscle rigidity and a rising end-tidal CO₂ after succinylcholine administration. The MOST likely diagnosis is:

A) Neuroleptic malignant syndrome B) Malignant hyperthermia C) Pseudocholinesterase deficiency D) Phase II block

8. Which of the following opioids is MOST appropriate for patients with renal failure due to lack of active metabolite accumulation?

A) Morphine B) Codeine C) Meperidine D) Fentanyl

9. The "cannot intubate, cannot oxygenate" (CICO) rescue technique of last resort is:

A) Laryngeal mask airway insertion B) Awake fiberoptic intubation C) Emergency surgical cricothyrotomy D) Retrograde intubation

10. Ketamine's primary mechanism of action is:

A) GABA-A receptor potentiation B) Alpha-2 adrenergic agonism C) NMDA receptor antagonism D) Mu-opioid receptor agonism

11. Which of the following is TRUE regarding spinal anesthesia?

A) Hyperbaric solutions migrate cephalad when the patient is placed in Trendelenburg B) The dura mater is not punctured during spinal anesthesia C) Onset is slower than epidural anesthesia D) Larger volumes are required compared to epidural anesthesia

12. The Sellick maneuver (cricoid pressure) is applied during rapid sequence induction primarily to:

A) Facilitate endotracheal intubation B) Prevent passive regurgitation and aspiration C) Open the glottis for better visualization D) Reduce the dose of induction agent needed

13. Propofol's primary mechanism of action involves:

A) Blocking NMDA receptors B) Potentiation of GABA-A receptor chloride channels C) Activation of mu-opioid receptors D) Inhibition of sodium channel conduction

14. Which nerve block is MOST appropriate for providing analgesia after a total knee replacement?

A) Femoral nerve block B) Popliteal sciatic block C) Obturator nerve block D) Adductor canal block

15. A patient receiving a bupivacaine infusion develops wide-complex arrhythmia and cardiovascular collapse. The FIRST-LINE treatment is:

A) Amiodarone 300 mg IV B) Sodium bicarbonate bolus C) Lipid emulsion (Intralipid) 20% IV bolus D) Epinephrine 1 mg IV

16. Which muscle relaxant monitoring modality confirms complete reversal of neuromuscular blockade?

A) Single twitch returning to baseline B) Train-of-four (TOF) ratio ≥ 0.9 C) Post-tetanic count > 1 D) Double-burst stimulation showing any response

17. Dexmedetomidine produces sedation and analgesia primarily through:

A) GABA-A receptor modulation B) Alpha-2 adrenergic receptor agonism in the locus coeruleus C) Opioid receptor agonism D) Mu receptor partial agonism

18. In a patient with a full stomach undergoing emergency surgery, the MOST important modification to the induction sequence is:

A) Use of higher propofol dose B) Avoidance of opioids C) Rapid sequence induction with cricoid pressure D) Inhalational induction with sevoflurane

19. The CLASSIC sign of endobronchial intubation on the anesthesia monitor is:

A) Decrease in peak airway pressure B) Sudden drop in end-tidal CO₂ C) Decreased oxygen saturation with unilateral breath sounds D) Increase in tidal volume delivery

20. Neostigmine reverses non-depolarizing neuromuscular blockade by:

A) Directly competing with the relaxant at the nicotinic receptor B) Inhibiting acetylcholinesterase, increasing synaptic acetylcholine C) Stimulating presynaptic acetylcholine release D) Chelating the neuromuscular blocking agent

Good luck! Let me know when you want the answers or an explanation for any question.