10 Random Questions
In a healthy patient receiving an epidural analgesic infusion postoperatively, clear fluid is noted to drip back freely from the epidural catheter. Which of the following findings correctly identifies the associated fluid?
- (A) Precipitation when mixed with an equal volume of pancuronium = local anesthetic
- (B) pH 7.1 = saline solution
- (C) Glucose 120 mg/dl = CSF
- (D) Sodium 130 mEq/L = CSF
- (E) PCO2 51 mmHg = CSF
A sensory level of T2 is achieved after administration of spinal anesthesia. Which of the following lung volumes is LEAST likely to be affected?
- (A) Expiratory reserve volume
- (B) Inspiratory reserve volume
- (C) Inspiratory capacity
- (D) Tidal volume
- (E) Vital capacity
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
At term which of the following would produce the greatest increase in uterine blood flow?
- (A) Increasing PaO2 to greater than 100 mmHg
- (B) Administering ritodrine intravenously
- (C) Administering halothane to 1 MAC
- (D) Administering magnesium sulfate intravenously
- (E) Increasing PaCO2 from 35 to 40 mmHg
Which of the following phenomena is primarily responsible for the decrease in core body temperature that commonly occurs during the first hour of general anesthesia?
- (A) Convective heat loss from cutaneous vasodilation
- (B) Decreased heat production
- (C) Evaporative heat loss during skin preparation
- (D) Heat loss from the respiratory tract
- (E) Redistribution of core body heat to the periphery
The capnographic tracing is from a 2-month-old infant anesthetized using a pediatric circle system and mask at a fresh gas flow of 4 L/min. The sampling port is in the elbow connector. This tracing indicates
- (A) adequate alveolar ventilation
- (B) exhausted soda lime
- (C) expired halothane concentrations representative of alveolar concentrations
- (D) mixing of inspired and expired gases
- (E) the need to change to a Mapleson D circuit
An 8-year-old child with chronic renal failure is scheduled for an operation to create an arteriovenous fistula. Laboratory studies include: Hemoglobin 6.5 g/dl, Blood gases (breathing air) : PaO2 97 mmHg, PaCO2 29 mmHg, pH 7.30 Sodium 129 mEq/L Potassium 5.5 mEq/L Chloride 101 mEq/L Bicarbonate 15 mEq/L. Before inducing general anesthesia, which of the following abnormalities should be corrected?
- (A) Anemia
- (B) Metabolic acidosis
- (C) Potassium concentration
- (D) Anemia, metabolic acidosis, and potassium concentration
- (E) None of the above
Massive venous air embolism occurs in a patient who is undergoing craniotomy in the sitting position with nitrous oxide, oxygen, fentanyl anesthesia. Which of the following changes in end-tidal (ET) concentrations of carbon dioxide, nitrogen, and nitrous oxide are most likely in this patient? (ETCO2, ETN2, ETN2O)
- (A) Increased, increased, decreased
- (B) Decreased, decreased, increased
- (C) Decreased, decreased, decreased
- (D) Decreased, increased, decreased
- (E) Increased, decreased, decreased
A patient undergoes thoracotomy in the lateral decubitus position. Which of the following maneuvers is most likely to increase PaO2 during one-lung ventilation?
- (A) Applying continuous positive airway pressure to the nondependent lung
- (B) Applying positive end-expiratory pressure to the dependent lung
- (C) Increasing inspiratory flow rate
- (D) Increasing the tidal volume
- (E) Increasing the ventilatory rate
Which of the following is an effect of ketorolac administered after vaginal hysterectomy?
- (A) Euphoria
- (B) Prolonged prothrombin time
- (C) Respiratory depression
- (D) Suppression of inflammation
- (E) Thrombocytopenia