10 Random Questions
Which the following findings is most hazardous in premature infants?
- (A) Hematocrit of 55%
- (B) Rectal temperature of 35 degrees C
- (C) Umbilical arterial blood PO2 of 50 mmHg
- (D) Umbilical arterial blood PCO2 of 45 mmHg
- (E) Umbilical arterial systolic pressure of 60 mmHg
To predict the requirement for isoflurane in milliliters of vapor per minute during closed circuit anesthesia, each of the following is necessary EXCEPT
- (A) cardiac output
- (B) oxygen consumption
- (C) MAC of isoflurane
- (D) duration of administration
- (E) blood-gas partition coefficient
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
Pulmonary artery diastolic pressure increases acutely from 10 to 20 mmHg in a 28-year-old man undergoing cervical laminectomy in the sitting position. The most appropriate first step in the management of this patient is to
- (A) administer furosemide
- (B) aspirate from the proximal port of the pulmonary artery catheter
- (C) inflate the balloon on the pulmonary artery catheter
- (D) place the patient in the left lateral decubitus position
- (E) start an infusion of nitroglycerin
The ECG strip shown is recorded as a patient with a permanent transvenous DDD pacemaker enters the operating room. These changes indicate that the pacemaker is
- (A) sensing the T waves
- (B) sensing the retrograde P waves
- (C) triggering off the intrinsic atrial activity
- (D) malfunctioning in the atrial pacing mechanism
- (E) prematurely stimulating the ventricle
A 26-year-old woman has weakness on extension of the right knee one day after uneventful vaginal delivery under spinal anesthesia with lidocaine. The most likely cause is
- (A) femoral nerve injury from thigh abduction
- (B) obturator nerve injury from obstetric forceps
- (C) peroneal nerve compression from the leg support
- (D) saphenous nerve injury from the stirrups
- (E) chemical arachnoiditis following the spinal anesthetic
Neurolytic block is most appropriate for
- (A) abdominal pain secondary to hepatic carcinoma
- (B) abdominal pain secondary to chronic pancreatitis
- (C) persistent chest wall pain secondary to intercostal neuralgia following a thoracotomy for trauma
- (D) reflex sympathetic dystrophy of the upper extremity with an excellent but transient response to a series of stellate ganglion blocks with local anesthetic
- (E) a diabetic patient scheduled for surgical sympathectomy to relieve unilateral lower extremity pain secondary to severe peripheral vascular disease
A 67-year-old man undergoes spinal anesthesia with hyperbaric tetracaine 10 mg for transurethral resection of the prostate. At the end of the 50-minute procedure, the level of anesthesia is T6 and blood pressure is 120/70 mmHg. Within two minutes after transfer to a stretcher, the patient has nausea and blood pressure decreases to 76/42 mmHg. Which of the following is the most likely cause of the acute hypotension?
- (A) Acute congestive heart failure
- (B) Decreased venous return
- (C) Dilutional hyponatremia
- (D) Progression of sympathetic block
- (E) Unrecognized bladder perforation
Which of the following will result in the largest change in oxygen content?
- (A) Increased hemoglobin (Hgb) concentration from 10 to 15 g/dl
- (B) Increased PaO2 from 40 to 50 mmHg (Hgb 15 g/dl)
- (C) Increased PaO2 from 60 to 70 mmHg (Hgb 15 g/dl)
- (D) Increased P50 of Hgb from 27 to 37 mmHg (Hgb 15 g/dl)
- (E) Increased pH from 7.20 to 7.40
The primary determinant of the duration of an intravenous regional block sufficient to provide surgical anesthesia of an upper extremity is
- (A) duration of tourniquet inflation
- (B) capacitance of the venous system of the extremity
- (C) local anesthetic agent injected
- (D) volume of anesthetic solution injected
- (E) method of exsanguinating the arm