10 Random Questions
The odor of isoflurane is noted during isoflurane anesthesia with an endotracheal tube and mechanical ventilation. Mean airway pressure is unchanged. A scavenging system with an open interface and an active disposal system is being used. The most likely cause of the isoflurane odor is
- (A) a leak in the inspiratory limb of the anesthesia circuit
- (B) application of excessive negative pressure to the scavenging interface
- (C) malfunction of the pop-off valve of the anesthesia machine
- (D) obstruction of the gas disposal tubing leading from the scavenging interface
- (E) obstruction of the transfer tubing to the scavenging interface
A 21-year-old athlete has laryngospasm following extubation after undergoing repair of an inguinal hernia during general anesthesia. Bag and mask ventilation relieves the patient's symptoms. In the PACU 15 minutes later, he has dyspnea; Sp02 is 85% at an Fl02 of .40. Which of the following is the most likely cause?
- (A) Atelectasis
- (B) Decreased cardiac output
- (C) Pulmonary edema
- (D) Pulmonary embolism
- (E) Residual paralysis
Which of the following is most likely to decrease uterine tone?
- (A) Administration of isoflurane 1%
- (B) Administration of nitrous oxide 50%
- (C) Intravascular injection of 5 ml of 0.5% bupivacaine
- (D) Intravenous administration of ketamine 2 mg/kg
- (E) Paracervical block with 20 ml of 1% lidocaine
In a 35-year-old patient, which of the following is associated with an increased duration of clinical narcosis following infusion of a total dose of 10 mg/kg thiopental over three hours?
- (A) Alcoholism in remission
- (B) Asthma
- (C) Fever
- (D) Obesity
- (E) Use of appetite suppressants
Bronchospasm occurring during anesthesia in a patient with an ileal carcinoid is best treated by administration of
- (A) aminophylline
- (B) dexamethasone
- (C) halothane
- (D) ketamine
- (E) somatostatin
During axillary block of the brachial plexus, which nerve is most likely to be encountered if the needle is inserted through the posterior wall of the artery?
- (A) Intercostobrachial
- (B) Median
- (C) Musculocutaneous
- (D) Radial
- (E) Ulnar
Which of the lines shown in the graph illustrates the relationship of hematocrit and oxygen transport?
- (A) Line A
- (B) Line B
- (C) Line C
- (D) Line D
- (E) Line E
Which of the following is the most common cause of coagulopathy occurring during massive blood transfusion?
- (A) Decreased serum fibrinogen concentration
- (B) Decreased serum ionized calcium concentration
- (C) Dilutional thrombocytopenia
- (D) Disseminated intravascular coagulation
- (E) Hypothermia
Which of the following is the most appropriate action after an anesthetic vaporizer is tipped?
- (A) Return to the manufacturer for recalibration
- (B) Flush the vaporizer with oxygen at 5 L/min for 24 hours
- (C) Store the vaporizer for 24 hours at room temperature
- (D) Set the vaporizer at low concentration and flush with oxygen at 10 L/min for 30 minutes
- (E) Verify the vaporizer output with mass spectrography
A 22-year-old woman at 33 weeks' gestation has abdominal pain and vaginal bleeding after sustaining blunt trauma to the abdomen. Heart rate is 125 bpm, blood pressure is 98/65 mmHg, and respiratory rate is 20/min. Fetal heart rate is 100 bpm. Which of the following is the most appropriate management?
- (A) Conservative observation and monitoring if fetal immaturity is seen on ultrasound
- (B) Increasing maternal blood pressure with a vasopressor
- (C) Infusion of terbutaline
- (D) Lumbar epidural anesthesia
- (E) Urgent cesarean delivery