10 Random Questions
A patient sustains cardiac arrest while being mechanically ventilated. Which of the following is the most likely effect on PetCO2?
- (A) Gradual increase with the duration of asystole
- (B) Maintenance of the prearrest value
- (C) Abrupt decrease below the prearrest value
- (D) Decrease when thoracic compression is started
- (E) Gradual decrease independent of the ventilator cycle
The arterial waveform and EKG shown are from a 60-year-old man with uremia who is the PACU after hip surgery under general anesthesia. The patient is drowsy, extubated, and breathing easily. The most likely diagnosis is
- (A) hypovolemia
- (B) myocardial ischemia
- (C) nontension pneumothorax
- (D) pericardial tamponade
- (E) pulmonary embolus
A 30-kg patient with asthma is receiving general anesthesia and being mechanically ventilated with a measured tidal volume of 300 mL. Increasing the fresh gas flow from 3 L/min to 9 L/min without changing the ventilatory rate or I:E ratio will result in
- (A) decreased physiologic dead space
- (B) increased delivered tidal volume
- (C) increased end-expired carbon dioxide
- (D) unchanged delivered minute volume
- (E) unchanged peak inspiratory pressure
In patients with renal failure, which of the following muscle relaxants has the most prolonged elimination half-life?
- (A) Atracurium
- (B) Pancuronium
- (C) Succinylcholine
- (D) d-Tubocurarine
- (E) Vecuronium
A patient with chronic paraplegia (T4 level) is undergoing cystoscopy and removal of bladder calculi without anesthesia. After 10 minutes, blood pressure is 240/100 mmHg and pulse is 50 bpm. The most appropriate management is administration of
- (A) spinal anesthesia
- (B) inhalational anesthesia
- (C) thiopental intravenously
- (D) methyldopa intravenously
- (E) nitroprusside intravenously
Metoclopramide acts to
- (A) block dopamine receptors
- (B) decrease gastric acid production
- (C) decrease lower esophageal sphincter tone
- (D) delay gastric emptying
- (E) facilitate central cholinergic stimulation
A 25-year-old woman is receiving magnesium sulfate for eclampsia at 36 weeks' gestation. Each of the following is a maternal effect of this treatment EXCEPT
- (A) sedation
- (B) sensitization to depolarizing muscle relaxants
- (C) sensitization to nondepolarizing muscle relaxants
- (D) decreased uterine blood flow
- (E) loss of deep tendon reflexes prior to significant cardiac dysfunction
A 52-year-old woman undergoes facial surgery during general endotracheal anesthesia. The ventilator is set to deliver a tidal volume of 600 ml and a respiratory rate of 10/min at an FiO2 of 1.0. SpO2 is 100%, peak inspiratory pressure is 18 cmH2O, and PetCO2 is 40 mmHg. The surgeon flexes the patient's head so the chin touches the chest. Which of the following findings indicates that endobronchial intubation has NOT occurred?
- (A) Fluctuating capnographic waveform
- (B) Greater expiratory volume than inspiratory volume
- (C) Unchanged SpO2
- (D) Unchanged PetCO2
- (E) Unchanged peak inspiratory pressure
During transurethral resection of the prostate under spinal anesthesia with a sensory level to T10, a patient has sudden onset of sharp upper abdominal pain and nausea. Arterial blood pressure increases from 120/80 to 150/90 mmHg; the patient becomes diaphoretic. Which of the following is the most likely diagnosis?
- (A) Bladder perforation
- (B) Hemolysis
- (C) Hypervolemia
- (D) Hyponatremia
- (E) Myocardial ischemia
The effect of succinylcholine is terminated at postsynaptic effector cells by
- (A) binding and uptake by effector cells
- (B) diffusion into capillaries
- (C) hydrolysis by junctional cholinesterase
- (D) hydrolysis by pseudocholinesterase
- (E) spontaneous degradation to succinylmonocholine