10 Random Questions
A patient with metastatic carcinoma and chronic renal failure has tremors, fasciculations, mydriasis, and hyperreflexia after several days of therapy with high doses of meperidine for analgesia. Which of the following is most likely to occur if the meperidine is continued?
- (A) Disappearance of the symptoms as tolerance to meperidine develops
- (B) Pinpoint constriction of pupils
- (C) Progressive hypothermia
- (D) Progressive sedation from meperidine toxicity
- (E) Seizures from normeperidine toxicity
Syringe A contains 100 ml of normal blood with a PO2 of 2 mmHg, and syringe B contains 100 ml of normal blood with a PO2 of 98 mmHg. The contents of the two syringes are mixed anaerobicaily to equilibrium. The PO2 of the resultant mixture Is
- (A) 27 mmHg
- (B) 50 mmHg
- (C) 63 mmHg
- (D) 96 mmHg
- (E) 100 mmHg
A 2-year-old child is hospitalized for exposure. Rectal temperature is 30°C. The most appropriate method of warming is to
- (A) apply radiant heat
- (B) increase ambient temperature to 28°C
- (C) use a heating blanket set at 39°C
- (D) warm and humidify inspired gases
- (E) warm intravenous fluids to 37°C
You are asked to evaluate a 2000-g male infant three hours after vaginal delivery because of a respiratory rate of 50/min, pulse rate of 115 bpm, and the following arterial blood gas values while breathing room air: PaO2 64 mmHg, PaCO2 43 mmHg, and pH 7.33. His mother received meperidine 75 mg two hours before delivery. Appropriate management includes
- (A) administration of naloxone 50 mcg intramuscularly
- (B) increasing the FiO2 to 0.4
- (C) intubation and mechanical ventilation at an FiO2 of 0.5
- (D) administration of oxygen 50% with 5 cm H2O continuous positive airway pressure
- (E) observation, with no action at present
A 55-year-old man has quadriplegia after undergoing suboccipital craniotomy in the sitting position for treatment of acoustic neuroma. Which of the following is the most likely cause?
- (A) Air embolism with the presence of a probe-patent foramen ovale
- (B) Compression of the cervical cord related to neck flexion
- (C) Jugular venous obstruction
- (D) Postoperative tension pneumocephalus
- (E) Sustained elevation of cerebral perfusion pressure
Which of the following statements concerning opioid dependence in anesthesiologists is true?
- (A) Mortality rate is high
- (B) Deterioration of professional performance is an early sign
- (C) Nalbuphine suppresses signs of withdrawal
- (D) Naltrexone prevents relapse
- (E) Sufentanil is detected by urine screening
Prior to occlusion of any major pulmonary blood vessels during a thoracotomy, applying positive end-expiratory pressure to ventilation through the dependent lumen of a double-lumen tube and occluding the upper lumen of the tube will
- (A) increase blood flow to the dependent lung
- (B) increase the alveolar-arterial oxygen tension difference
- (C) override hypercarbic pulmonary vasoconstriction
- (D) improve the patient's oxygenation
- (E) increase the right ventricular dP/dt
Which of the following relationships is indicated by the curve illustrated in the graph shown?
- (A) Intracranial blood volume (X) and intracranial pressure (Y)
- (B) PaCO2 (X) and minute ventilation (Y)
- (C) PaO2 (X) and hemoglobin saturation (Y)
- (D) Preload (X) and stroke volume (Y)
- (E) Systemic arterial pressure (X) and cerebral blood flow (Y)
If minute ventilation is held constant, which of the following is LEAST likely to alter PaCO2?
- (A) General anesthesia
- (B) Hypothermia
- (C) Increased dead space
- (D) Increased pulmonary shunt
- (E) Induced hypotension
The most likely cause of a fetal heart rate pattern of variable decelerations to 90 bpm is
- (A) aortocaval compression
- (B) compression of the fetal head
- (C) fetal acidosis
- (D) maternal hypotension
- (E) umbilical cord compression