10 Random Questions
During an otherwise uneventful nitrous oxide-sevoflurane anesthetic in a spontaneously breathing patient, 85% nitrous oxide is accidently administered, resulting in a PO2 of 48 mmHg. Which of the following would be expected?
- (A) Tachycardia
- (B) Sweating
- (C) Tachypnea
- (D) Hyperactive EEG
- (E) None of the above
An EKG shows ventricular tachycardia in a patient with a heart rate of 160 bpm and a blood pressure of 90/60 mmHg. The best initial therapeutic maneuver prior to cardioversion is
- (A) carotid sinus massage
- (B) intravenous administration of bretylium
- (C) intravenous administration of amiodarone
- (D) intravenous administration of propranolol
- (E) precordial "thump"
Which of the following laboratory studies is most reliable in differentiating prerenal azotemia from acute tubular necrosis?
- (A) Creatinine clearance
- (B) Fractional excretion of sodium
- (C) Urine/plasma urea ratio
- (D) Urine sodium content
- (E) Urine specific gravity
A 40-year-old woman with chronic renal failure is undergoing revision of an arteriovenous shunt with general anesthesia. The capnographic waveform was obtained during spontaneous ventilation 20 minutes after administration of succinylcholine and tracheal intubation. Which of the following is the most likely cause of these findings?
- (A) Leaking endotracheal cuff
- (B) Channeling of soda lime
- (C) Light anesthesia
- (D) Metabolic acidosis
- (E) Residual neuromuscular block
Mepivacaine 40 ml of a 1% solution with epinephrine 1:200,000 is injected into the brachial plexus sheath at the axilla after eliciting a paresthesia in the ulnar nerve distribution. Which of the following is most likely to remain intact?
- (A) Adduction of the thumb
- (B) Flexion at the wrist
- (C) Sensation of the lateral forearm
- (D) Sensation on the palmar surface of the lateral three and one half fingers
- (E) Sensation on the palmar surface of the medial one and one half fingers
Compared with a person of normal weight, which of the following findings are most likely on pulmonary function testing of a patient with morbid obesity? (FVC, FEV/FVC, FRC, A-a DO2)?
- (A) Decreased, Normal, Decreased, Normal
- (B) Decreased, Normal, Decreased , Increased
- (C) Decreased, Normal, Normal, Increased,
- (D) Increased, Decreased, Normal, Increased
- (E) Increased, Decreased, Decreased, Increased
A 68-year-old man who is scheduled for outpatient cystoscopy has non-insulin-dependent diabetes mellitus controlled with glipizide (Glucatrol) 5 mg twice daily. He has had nothing to eat since awakening this morning and has not taken glipizide today. His blood glucose level is 185 mg/dl. Before proceeding, the most appropriate management is to administer
- (A) glipizide 5 mg orally
- (B) NPH insulin 10 units subcutaneously
- (C) regular insulin 10 units intravenously
- (D) dextrose and regular insulin by infusion
- (E) no additional diabetic medication
A 30-year-old man who is undergoing laparotomy and resection of a large kidney tumor has a decrease in SpO2 from 100% to 92% and an increase in peak airway pressure from 20 to 35 cm H2O. Plateau pressure is unchanged at 18 cm H2O. Which of the following is the most likely cause?
- (A) Abdominal packing
- (B) Inadequate anesthesia
- (C) Inadequate muscle relaxation
- (D) Obstruction of the endotracheal tube
- (E) Pneumothorax
Which of the following statements concerning flumazenil is true?
- (A) Hepatic clearance is low
- (B) It binds irreversibly with the benzodiazepine receptor
- (C) It causes hypertension and tachycardia
- (D) It has a shorter duration of action than midazolam
- (E) It reverses opioid-induced respiratory depression
In a patient with hypovolemic shock, which of the following factors is the best measure of the overall balance between oxygen supply and demand?
- (A) Arterial oxygen content
- (B) PetO2
- (C) Mixed venous oxygen saturation
- (D) PaO2
- (E) Transcutaneous oxygen tension