10 Random Questions
The five curves shown represent the uptake of enflurane, desflurane, halothane, isoflurane, and nitrous oxide. Which uptake curve best depicts desflurane?
- (A) Curve A
- (B) Curve B
- (C) Curve C
- (D) Curve D
- (E) Curve E
Which of the following drugs administered to a parturient eliminates fetal heart rate variability?
- (A) Atropine
- (B) Ephedrine
- (C) Hydralazine
- (D) Magnesium sulfate
- (E) Terbutaline
A 30-year-old woman is undergoing laparoscopic tubal ligation. Thirty minutes after induction of general anesthesia, arterial oxygen saturation has decreased to 89%. Arterial blood gases at an FiO2 of 1.0 are PaO2 63 mmHg and PaCO2 40 mmHg; PetCO2 is 32 mmHg. Which of the following is the most likely cause?
- (A) Carbon dioxide embolus
- (B) Endobronchial intubation
- (C) Hypoventilation
- (D) Inadvertent application of high levels of positive end-expiratory pressure
- (E) Leak in the capnography sampling catheter
Left ventricular end-diastolic volume is most likely to be underestimated by pulmonary artery occlusion pressure in patients with
- (A) acute myocardial ischemia
- (B) aortic insufficiency
- (C) mitral stenosis
- (D) primary pulmonary hypertension
- (E) tricuspid stenosis
Twenty minutes after an axillary block, the patient reports feeling over the "back of the hand." Examination shows normal sensation over the lateral aspect of the dorsum of the hand and the dorsal base of the thumb and index finger. Supplementary anesthesia of this area can be provided by blocking which of the following nerves?
- (A) Ulnar
- (B) Musculocutaneous
- (C) Median
- (D) Radial
- (E) Intercostobrachial
When inspired anesthetic gases are humidified
- (A) most particles 1 to 2 microns in size are deposited in the trachea
- (B) respiratory epithelial cilia become less active
- (C) alveolar water vapor pressure is unchanged
- (D) respiratory heat loss is abolished
- (E) sterilization of breathing apparatus is mandatory
A 29-year-old man who has been nasotracheally intubated for two weeks following a motor vehicle accident has a fever (39C) and a constant headache. Leukocyte count is 18,000/mm3. The most likely cause is
- (A) fractured nasal septum
- (B) retropharyngeal abscess
- (C) maxillary sinusitis
- (D) meningitis
- (E) rhinovirus infection
The best premedication regimen for a known active narcotic addict would include
- (A) secobarbital
- (B) diazepam
- (C) nalbuphine
- (D) morphine
- (E) droperidol
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
The rate of induction with inhalational agents is more rapid in neonates than adults because of a relatively increased
- (A) cardiac output
- (B) cerebral blood flow
- (C) functional residual capacity
- (D) metabolic rate
- (E) minute ventilation