Anesthesia Hub -

10 Random Questions

Which of the following statements concerning relationships among alveolar pressure, volume, and surface tension is true?

(A) Surface tension of surfactant decreases as alveolar volume decreases
(B) Surface tensions of water and of surfactant behave similarly as volume decreases
(C) Changes in alveolar surface tension with volume are the same during expansion as during contraction
(D) Pressure in the alveolus is inversely related to surface tension
(E) Pressure in the alveolus is directly related to alveolar radius

BASIC Respiratory & Critical Care

A 32-year-old patient with end-stage renal failure has irreversible neuromuscular blockade two hours after tracheal intubation with a muscle relaxant. Which of the following is the most likely cause?

(A) Atracurium
(B) Doxacurium
(C) Mivacurium
(D) Pancuronium
(E) Vecuronium

BASIC Pharmacology & Pharmacokinetics

During frontal craniotomy for removal of an astrocytoma, the surgeon notes that the brain is "tight." The patient is receiving nitrous oxide 50% in oxygen, isoflurane 0.5%, fentanyl, and pancuronium. Heart rate is 92 bpm, blood pressure is 110/60 mmHg, end-tidal carbon dioxide tension is 31 mmHg, and oxygen saturation is 98%. The most appropriate initial treatment is to

(A) administer a beta-adrenergic blocker
(B) administer thiopental
(C) decrease isoflurane concentration
(D) decrease mean arterial pressure to 60 mmHg
(E) increase alveolar ventilation

The potency of an inhalational anesthetic correlates best with its

(A) vapor pressure
(B) blood/gas partition coefficient
(C) molar volume
(D) brain/gas partition coefficient
(E) oil/gas partition coefficient

During apneic oxygenation (FiO2 1.0) through a rigid bronchoscope

(A) duration of the procedure is limited by the increase in PaCO2
(B) functional residual capacity decreases 5%/min
(C) PaO2 remains unchanged for the first 5 minutes
(D) PaCO2 increases 2 to 6 mmHg/min for 15 minutes and then reaches a plateau
(E) PaO2 and PaCO2 equilibrate with mixed venous gases at the same rate

BASIC Respiratory & Critical Care

Which of the following statements concerning hyperkalemia after succinylcholine administration to a patient with a spinal cord injury is true?

(A) It is unlikely to occur if the lesion is located below T6
(B) It is unlikely to occur within 24 hours of the injury
(C) It is unlikely to occur more than 60 days after the initial injury
(D) It is prevented by pretreatment with small doses of a nondepolarizing agent
(E) It is decreased in magnitude by pretreatment with calcium chloride

BASIC Pharmacology & Pharmacokinetics

Which of the following findings is most likely in a 3-year-old child who has a secundum-type atrial septal defect with a 2:1 left-to-right shunt?

(A) Pulmonary blood flow twice that of systemic blood flow
(B) Pulmonary vascular resistance twice normal
(C) Mean pulmonary artery pressure twice normal
(D) Right atrial pressure twice normal
(E) Hypoxemia while breathing room air

ADVANCED Pediatric

Which of the following antihypertensive drugs is most likely to cause bradycardia?

(A) Captopril
(B) Clonidine
(C) Hydralazine
(D) Nifedipine
(E) Phenoxybenzamine

A healthy, 18-year-old, 65-kg woman undergoing diagnostic laparoscopy is being monitored with a properly functioning and calibrated capnograph. The end-tidal carbon dioxide concentration is 6%, and the inspired carbon dioxide concentration is 1%. This may be caused by each of the following EXCEPT

(A) malfunction of the expiratory valve in a circle system
(B) low gas inflow with a Bain circuit
(C) exhausted soda lime within a circle system
(D) absorption of carbon dioxide from carbon dioxide laparoscopy
(E) carbon dioxide in the fresh gas flow

BASIC Equipment & Physics

The acute onset of hypotension without a decrease in mixed venous oxygen saturation is most likely associated with the onset of

(A) hemorrhage
(B) myocardial infarction
(C) pulmonary edema
(D) pulmonary embolus
(E) sepsis

ADVANCED Respiratory & Critical Care General