10 Random Questions

Equipment & Physics   Cardiac  

Intraoperatively, the occurrence of prominent "a" waves on the central venous pressure waveform can be explained by each of the following EXCEPT


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The laryngeal mask airway


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Which of the following fluids will restore circulating blood volume with the smallest infused volume?


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Pharmacology & Pharmacokinetics  

The use of droperidol as a preanesthetic medication has been associated with each of the following EXCEPT


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General  

A 40-year-old man is undergoing open reduction and internal fixation of a fractured femur. During anesthesia with fentanyl, sevoflurane, and oxygen, heart rate decreases to 20 bpm and 6 premature ventricular contractions per minute are noted. No pulse is detected. The most appropriate next step is to


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Respiratory & Critical Care  

In a patient with 20% pulmonary shunt and a PaO2 of 60 mmHg, cardiac output suddenly decreases from 5 L/min to 3 L/min. Oxygen consumption is unchanged. As a result, the PaO2 will


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Cardiac  

In a patient with surgically significant aortic insufficiency, cardiac output measured by thermodilution will


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Regional & Pain  

A 65-year-old man undergoes prostatectomy in the lithotomy position under spinal anesthesia using bupivacaine 12 mg. Ten hours later, he reports that his left foot is numb. Examination shows decreased pinprick sensation over the lateral dorsal aspect of the left foot; dorsiflexion is limited. Which of the following is the most likely cause?


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Regional & Pain  

In a patient with peripheral vascular disease, the most likely result of lumbar sympathetic block is


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Pediatric  

A full-term newborn has marked respiratory distress in the delivery room. Breath sounds are asymmetric and the abdomen is scaphoid. Which of the following maneuvers is most appropriate?


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