Anesthesia Hub -

10 Random Questions

Compared with isoflurane, desflurane

(A) causes higher plasma norepinephrine levels
(B) has greater biodegradability
(C) has a higher blood/gas partition coefficient
(D) has a lower MAC value
(E) has a lower vapor pressure

A 16-year-old girl is receiving isoflurane, nitrous oxide, oxygen, and pancuronium for insertion of a Harrington rod. In order to perform a "wake-up test" the muscle relaxant was antagonized with neostigmine 2.5 mg and atropine 1 mg. The patient abruptly moved all extremities and was given thiopental 100 mg and succinylcholine 100 mg rapidly. Forty-five minutes later no twitch could be elicited with a nerve stimulator. The most likely explanation is

(A) a dibucaine number of 20
(B) incomplete antagonism of pancuronium
(C) prolongation of the action of succinylcholine by neostigmine
(D) spinal cord damage caused by the abrupt arousal
(E) synergism between succinylcholine and pancuronium

BASIC Pharmacology & Pharmacokinetics Pediatric

A 27-year-old man with chronic renal failure is to undergo revision of an arteriovenous graft. He insists on general anesthesia. Hemodialysis was completed two hours ago, and serum potassium concentration is now 5 mEq/L. Which of the following statements concerning anesthetic management of this patient is true?

(A) Enflurane is contraindicated
(B) Succinylcholine is contraindicated
(C) Neostigmine will be required in larger than usual dosage
(D) The duration of action of atracurium will be prolonged
(E) The duration of action of propofol will be unchanged

Which of the following provides the most definitive diagnosis in a patient with suspected brain death?

(A) Absent bilateral somatosensory evoked potentials
(B) Absent cerebral blood flow during four-vessel contrast cerebral arteriography
(C) Intracranial pressure greater than mean arterial pressure
(D) Score of zero on Glasgow Coma Scale
(E) Two isoelectric electroencephalograms

ADVANCED Respiratory & Critical Care Neuro

Optimal positioning of a left-sided double-lumen endobronchial tube is easier than positioning of a right-sided endobronchial tube because the

(A) angle between the trachea and bronchus is wider on the left
(B) diameter of the left mainstem bronchus is larger
(C) diameter of the left upper lobe bronchus is larger
(D) distance between the left upper lobe bronchus and the carina is greater
(E) left mainstem bronchus is more rigid

While delivering nitrous oxide 1.5 L/min, oxygen 1.5 L/min, and sevoflurane 2%, a leak in the oxygen flowmeter would most likely be detected by the

(A) low airway pressure alarm
(B) "fail-safe" system
(C) oxygen analyzer on the expiratory limb
(D) oxygen flowmeter reading
(E) mass spectrometric analysis of gases

BASIC Equipment & Physics

Each of the following findings is characteristic of restrictive lung disease EXCEPT

(A) decreased elasticity of the lungs
(B) decreased FEV1/FVC ratio
(C) decreased inspiratory reserve volume
(D) increased work of breathing
(E) normal anatomic dead space

BASIC Respiratory & Critical Care

Which of the following statements concerning cerebral blood flow (CBF) during anesthesia is true?

(A) CBF changes minimally when PaC02 increases from 30 to 40 mmHg
(B) CBF changes minimally when P02 decreases from 160 to 100 mmHg
(C) CBF is autoregulated when mean arterial pressure is 40 mmHg
(D) CBF is coupled to cerebral metabolism during isoflurane anesthesia
(E) CBF is unaffected by 1.2% isoflurane at a PaC02 of 40 mmHg

Each of the following is an adverse effect of ritodrine used for suppression of labor EXCEPT

(A) dysrhythmias
(B) hyperglycemia
(C) hyperkalemia
(D) hypotension
(E) pulmonary edema

ADVANCED Pharmacology & Pharmacokinetics OB

What is the expected mixed venous oxygen tension, in mmHg, in a normal adult after breathing 100% oxygen for 10 minutes?

(A) 573
(B) 563
(C) 150
(D) 95
(E) 45