10 Random Questions
If the low-pressure alarm of an anesthesia circuit is broken, which of the following monitors will provide the earliest indication of a disconnected ventilator hose?
- (A) Fail-safe system
- (B) Infrared capnograph
- (C) Nitrogen analyzer
- (D) Oxygen analyzer
- (E) Pulse oximeter
In calculating the fluid requirements for a newborn undergoing repair of an omphalocele, the third-space loss should be replaced by
- (A) 0.9% saline solution
- (B) 2.5% dextrose in 0.45% saline solution
- (C) 5% dextrose in lactated Ringer's solution
- (D) 5% dextrose in water
- (E) 5% dextrose in 0.25% saline solution
Which of the following nerves is most likely to be injured by a fracture of the shaft of the humerus?
- (A) Axillary
- (B) Median
- (C) Musculocutaneous
- (D) Radial
- (E) Ulnar
A 26-year-old patient with multiple trauma is admitted to the intensive care unit postoperatively. The early development of polyuria, hypotension, low urine sodium excretion, high serum osmolality, and normal serum creatinine concentration is best explained by
- (A) adrenal insufficiency
- (B) fluoride-induced high-output renal failure
- (C) inappropriate ADH secretion
- (D) intraoperative fluid overload
- (E) posterior pituitary insufficiency
Peak airway pressure increases from 25 to 50 cmH2O when beginning right endobronchial ventilation with a right double-lumen tube. The most likely explanation for this increase is
- (A) failure to decrease tidal volume
- (B) inadvertent intubation of the left mainstem bronchus
- (C) intrinsic resistance of small endobronchial lumina
- (D) obstruction of the orifice of the right upper lobe
- (E) overinflation of the bronchial tube cuff
Which of the following is the most likely cause of the coronary steal phenomenon?
- (A) Idiopathic hypertrophic subaortic stenosis (IHSS)
- (B) Decreased cardiac contractility
- (C) Dilation of coronary arterioles
- (D) Dilation of epicardial coronary arteries
- (E) Increased systemic vascular resistance
Which of the following changes is most likely in the patient whose pulmonary pathology is schematically illustrated?
- (A) Decreased diffusing capacity
- (B) Decreased PaO2
- (C) Decreased pH
- (D) Increased PaCO2
- (E) Increased Vd/Vt
Which of the following statements concerning fetal hemoglobin is true?
- (A) It makes up less than 50% of the total hemoglobin in the neonate
- (B) It has less affinity for oxygen than adult hemoglobin
- (C) It binds with greater affinity to 2,3-DPG than adult hemoglobin
- (D) It shifts the oxyhemoglobin dissociation curve to the left
- (E) It has a P50 of 27 mmHg
The sudden onset of pulmonary edema can be caused by each of the following EXCEPT
- (A) rapid re-expansion of the lungs following pneumothorax
- (B) upper airway obstruction
- (C) oxygen toxicity
- (D) rupture of mitral papillary muscle
- (E) severe preeclampsia
A mechanically ventilated newborn infant is undergoing gastroschisis repair during halothane anesthesia. Based on the right radial artery catheter tracing shown, which of the following is the most appropriate conclusion?
- (A) The abdomen has not yet been incised
- (B) The anesthetic should be changed from halothane to isoflurane
- (C) The ductus arteriosus is still open
- (D) The infant is hypovolemic
- (E) The tidal volume is inadequate