10 Random Questions
If administered epidurally in equipotent doses, which of the following opioids will produce analgesia over the greatest number of dermatomes?
- (A) Fentanyl
- (B) Hydromorphone
- (C) Meperidine
- (D) Morphine
- (E) Sufentanil
A 70-year-old man who has just undergone an abdominal aortic aneurysm repair under halothane anesthesia develops hypertension, dyspnea, and cyanosis shortly after awakening in the recovery room. Administration of furosemide 20 mg intravenously improves the cyanosis within 10 minutes. This immediate effect of furosemide is best explained by
- (A) inotropic effect from electrolyte shifts
- (B) decreased preload through diuresis
- (C) increased peripheral venous capacitance
- (D) decreased pulmonary vascular resistance
- (E) increased coronary blood flow
A 2-year-old child has cardiac arrest during an inguinal herniorrhaphy under general anesthesia administered during a Jackson-Rees system. The graph shows end-tidal PCO2 monitored from the tip of the endotracheal tube during cardiopulmonary resuscitation; minute ventilation is unchanged. Which of the following is the most likely cause of the change beginning at the arrow?
- (A) Decreased fresh gas flow
- (B) Inadequate chest compression
- (C) Increased dead space
- (D) Restoration of cardiac output
- (E) Sampling artifact
Failure to block the musculocutaneous nerve adequately during the axillary approach to brachial plexus block will result in inadequate anesthesia of the
- (A) thumb and index finger
- (B) dorsum of the wrist
- (C) lateral aspect of the forearm
- (D) lateral aspect of the elbow
- (E) medial aspect of the upper arm
A 75-year-old man received an uneventful epidural anesthetic for total knee arthroplasty. Twenty-four hours later he has a painless flaccid paralysis in both legs. This clinical presentation is most consistent with
- (A) adhesive arachnoiditis
- (B) anterior spinal artery thrombosis
- (C) epidural abscess
- (D) epidural hematoma
- (E) transverse myelitis
As part of a preoperative evaluation, a patient had a thallium scan showing a "cold spot" over the left ventricle that occurs with moderate exercise and disappears at rest. This most likely indicates
- (A) moderate-sized aneurysm of the left ventricle
- (B) acute myocardial ischemia
- (C) recent myocardial infarction
- (D) old myocardial infarction
- (E) Prinzmetal's variant angina
Compared with adult hemoglobin, which of the following is a characteristic of fetal hemoglobin?
- (A) It has a greater oxygen-carrying capacity
- (B) It has a lower P50
- (C) It is more likely to cause an artifactual increase in Sp02
- (D) It is more likely to sickle
- (E) It unloads oxygen more readily at the tissues
With direct arterial blood pressure monitoring
- (A) systolic pressure in the aortic root exceeds that in the radial artery
- (B) mean and diastolic pressures are lower in the dorsalis pedis artery than in the aortic root
- (C) the dicrotic notch is not clearly found on femoral arterial waveforms
- (D) an underdamped waveform is characteristic of bubbles in the system
- (E) longer tubing between artery and transducer artifactually augments systolic pressure
Which of the following statements concerning air embolism during intracranial operations is true?
- (A) It does not occur in supine patients
- (B) It is prevented by positive end-expiratory pressure
- (C) It is confined to the right side of the heart and the pulmonary vasculature
- (D) It is detectable by measurement of end-tidal nitrogen
- (E) It is most efficiently treated by aspiration from a pulmonary artery catheter
Each of the following is a complication of celiac plexus block with 0.5% lidocaine 40 ml EXCEPT
- (A) hematuria
- (B) ileus
- (C) postural hypotension
- (D) retroperitoneal hematoma
- (E) weakness of hip flexors