Anesthesia Hub -

10 Random Questions

Which of the following will occur if the top of the oxygen flowmeter is cracked and leaking during anesthesia with nitrous oxide and oxygen?

(A) The back-pressure check valve will protect against a hypoxic gas mixture
(B) The fail-safe mechanism will protect against a hypoxic gas mixture
(C) The inspired oxygen concentration will be less than that set by the flowmeters
(D) The leak will be detected if the circle is pressurized prior to use
(E) The rotameter will accurately reflect the fresh gas flow to the patient

BASIC Equipment & Physics

Meperidine has a more rapid onset of action than morphine following intravenous injection because of its

(A) lesser ionization
(B) greater lipid solubility
(C) lesser protein binding
(D) smaller volume of distribution
(E) slower rate of hepatic clearance

BASIC Pharmacology & Pharmacokinetics

During right upper lobectomy and one-lung ventilation with a double-lumen endotracheal tube, the PaO2 decreases to 40 mmHg. The PaCO2 is 39 mmHg. Which of the following is most appropriate?

(A) Confirm position of the tube with bronchoscopy
(B) Apply 5 cmH20 continuous positive airway pressure to the nondependent lung
(C) Apply 5 cmH20 positive end-expiratory pressure to the dependent lung
(D) Resume two-lung ventilation
(E) Clamp the pulmonary artery of the nondependent lung

ADVANCED Respiratory & Critical Care General

Neuromuscular blockade of the diaphragm is best ensured by monitoring which of the following peripheral muscles?

(A) Adductor pollicis muscle
(B) First dorsal interosseous muscle
(C) Flexor hallucis muscle
(D) Muscles of the hypothenar eminence
(E) Orbicularis oculi muscle

A 70-year-old patient is shivering and has chest pain in the PACU following a cholecystectomy. Heart rate is 120 bpm, and blood pressure is 220/120 mmHg. SpO2 is 97% at an FiO2 of 0.4. An ECG shows ST-T wave changes, which are not affected by intravenous administration of nitroglycerin. Which of the following is the most appropriate next step?

(A) Administration of esmolol
(B) Administration of hydralazine
(C) Administration of nitroprusside
(D) Application of a warming blanket
(E) Increasing FiO2

ADVANCED General Cardiac

Which of the following statements concerning ketorolac is true?

(A) It binds to opioid receptors
(B) It causes dose-related thrombocytopenia
(C) It decreases heart rate during isoflurane anesthesia
(D) It is eliminated unchanged in urine
(E) It reversibly inhibits cyclooxygenase

BASIC Pharmacology & Pharmacokinetics

Delirium produced by high doses of atropine can be reversed by intravenous injection of

(A) diphenhydramine
(B) flumazenil
(C) naloxone
(D) neostigmine
(E) physostigmine

BASIC Pharmacology & Pharmacokinetics

A 50-year-old patient is undergoing craniotomy for clipping of a cerebral aneurysm with isoflurane, nitrous oxide, and fentanyl anesthesia. At the time of aneurysm exposure, the EEG shows burst suppression. Which of the following is the most likely cause?

(A) Cerebral ischemia
(B) Cerebral vasospasm
(C) Fentanyl effect
(D) Isoflurane effect
(E) Petit mal seizure activity

ADVANCED Neuro

Alveolar and inspired anesthetic concentrations equilibrate more rapidly with nitrous oxide than with desflurane because nitrous oxide

(A) has a higher vapor pressure
(B) has a lower blood gas solubility
(C) has a lower MAC
(D) is delivered at a higher inspired concentration
(E) produces a second gas effect

BASIC Pharmacology & Pharmacokinetics

Each of the following values is associated with acute tubular necrosis EXCEPT

(A) urine osmolality of 200 mOsm/kg
(B) urine sodium concentration of 15 mEq/L
(C) urine specific gravity of 1.009
(D) urine/serum osmolarity ratio of 1.2
(E) fractional excretion of sodium of 4%

BASIC General