10 Random Questions
Trimethaphan causes each of the following EXCEPT
- (A) cerebral vasodilation
- (B) urinary retention
- (C) pupillary cycloplegia
- (D) histamine release
- (E) potentiation of succinylcholine block
Normal pseudocholinesterase
- (A) is highly concentrated at the motor end-plate
- (B) hydrolyzes succinylcholine by Hofmann elimination
- (C) is produced primarily at nerve terminals
- (D) is antagonized by acetylcholinesterase inhibitors
- (E) resists dibucaine inhibition more than its atypical variant
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
A 72-year-old man has massive venous hemorrhage during a radical prostatectomy. Blood pressure decreases from 110/60 to 75/30 mmHg and central venous pressure decreases from 12 to 4 mmHg. PetC02 decreases from 34 to 24 mmHg during constant minute ventilation. The most appropriate next step should be to
- (A) apply positive end-expiratory pressure to the breathing circuit
- (B) attempt to aspirate air from the central venous catheter
- (C) expand intravascular volume
- (D) place the patient in the Trendelenburg position
- (E) turn the patient to the left lateral decubitus position
Compared with the adult airway, the airway of an infant is characterized by
- (A) greater narrowing at the cricoid ring
- (B) a less rigid epiglottis
- (C) a more caudad laryngeal opening
- (D) a relatively smaller tongue
- (E) relatively larger tonsils
A 2.3-kg 1-day-old term infant requires repair of a gastroschisis. Which of the following combinations is most appropriate for intraoperative fluid management?
- (A) Dextrose 5% in water for maintenance and lactated Ringer's solution for replacement of third space losses
- (B) Dextrose 10% in water for maintenance and lactated Ringer's solution for replacement of third space losses
- (C) Lactated Ringer's solution for maintenance and replacement of third space losses
- (D) Lactated Ringer's solution for maintenance and albumin 5% for replacement of third space losses
- (E) Normal saline solution for maintenance and lactated Ringer's solution for replacement of third space losses
Preoperative evaluation of a patient who has marked malnutrition will demonstrate each of the following EXCEPT
- (A) decreased respiratory muscle function
- (B) decreased serum albumin concentration
- (C) decreased metabolic rate
- (D) suppressed immune function
- (E) decreased extracellular fluid volume
During laser excision of a vocal cord polyp, the tracheal tube ignites. Which of the following is the most appropriate next step?
- (A) Continue ventilation with air
- (B) Ensure patency of the endotracheal tube
- (C) Extubate the trachea
- (D) Flood the surgical field with saline solution
- (E) Increase the concentration of nitrous oxide
Hypothermia to 29°C will decrease
- (A) hematocrit
- (B) plasma fibrinogen concentration
- (C) plasma pH
- (D) plasma protein concentration
- (E) platelet function
Intractable pain due to unresectable pancreatic carcinoma is most effectively treated with
- (A) bilateral neurolytic intercostal blocks at T10-12
- (B) bilateral sympathetic blocks with phenol
- (C) celiac plexus block with alcohol
- (D) epidural block with phenol
- (E) subarachnoid block with alcohol