10 Random Questions
When succinylcholine is administered intravenously to infants, intragastric pressure
- (A) is usually unchanged
- (B) increases to a peak of 30 cmH20 within two minutes
- (C) increases because of abdominal muscle fasciculations
- (D) increases because of an acetylcholine-like effect on the vagus nerve
- (E) peaks and subsides within five minutes
The tracing shown is from a femoral artery catheter. Which of the following is the most likely explanation?
- (A) An air bubble greater than 1 ml is in the tubing
- (B) The diastolic pressures is factitiously high
- (C) Mean blood pressure is inaccurate
- (D) The monitoring system is underdamped
- (E) Systolic pressure in the aortic arch exceeds 200 mmHg
Compared with morphine, a single epidural administration of fentanyl is associated with
- (A) delayed onset of analgesia
- (B) increased incidence of pruritus
- (C) increased incidence of respiratory depression
- (D) longer duration of action
- (E) more restricted segmental spread
Pain and spasm due to injury of the deltoid muscle is most effectively relieved by
- (A) axillary block
- (B) cervical sympathetic block
- (C) interscalene brachial plexus block
- (D) paravertebral block at C4
- (E) superficial cervical plexus block
The laryngeal mask airway
- (A) causes more hemodynamic stimulation than an oropharyngeal airway
- (B) is contraindicated in patients with cervical spine instability
- (C) is more easily inserted when cricoid pressure is applied
- (D) may serve as a temporary airway in case of a failed rapid sequence intubation
- (E) requires administration of a muscle relaxant to avoid laryngospasm during insertion
During cardiopulmonary bypass at a nasopharyngeal temperature of 28°C and a hematocrit of 20%, temperature-corrected PaCO2 is 50 mmHg and uncorrected PaCO2 is 60 mmHg. The most appropriate management is to
- (A) administer additional opioid
- (B) administer packed red blood cells to increase hematocrit to 25%
- (C) further decrease the patient's temperature
- (D) increase fresh gas flow to the oxygenator
- (E) institute mechanical ventilation
A jaundiced patient requires general anesthesia for portocaval shunt. He has a long history of alcohol abuse and is cirrhotic with ascites. Special considerations relevant to induction of anesthesia for this patient include each of the following EXCEPT:
- (A) Denitrogenation by mask may be more rapid than expected
- (B) The risk of aspiration is increased
- (C) The dose of thiopental necessary for induction will be predictably reduced
- (D) The duration of succinylcholine action may be prolonged
- (E) Alfentanil would be an appropriate supplement
Which of the following is most effective for maintaining core body temperature in an adult during general anesthesia for foot surgery?
- (A) Heating inspired gas to 28°C
- (B) Warming intravenous fluids to 30°C
- (C) Increasing ambient temperature to 28°C
- (D) Placing a warming blanket beneath the patient
- (E) Placing four 200-watt warming bulbs within 76 cm of the wound
Twenty minutes after an axillary block, the patient reports feeling over the "back of the hand." Examination shows normal sensation over the lateral aspect of the dorsum of the hand and the dorsal base of the thumb and index finger. Supplementary anesthesia of this area can be provided by blocking which of the following nerves?
- (A) Ulnar
- (B) Musculocutaneous
- (C) Median
- (D) Radial
- (E) Intercostobrachial
With long-term administration, which of the following drugs produces the most prolonged sedative effect of diazepam?
- (A) Cimetidine
- (B) Famotidine
- (C) Metoclopramide
- (D) Ranitidine
- (E) Warfarin