A 63-Year-Old Man Comes to the Emergency Department Due to Pain

question 171

Multiple Choice

A 63-year-old man comes to the emergency department due to pain and swelling of the right calf.  He has a history of recurrent gastrointestinal hemorrhage and was discharged from the hospital 4 days ago following a prolonged admission for diverticular bleeding requiring multiple blood transfusions.  Temperature is 36.7 C (98 F) , blood pressure is 110/60 mm Hg, pulse is 92/min, and respirations are 18/min.  Compression ultrasonography with Doppler reveals deep venous thrombosis in the right popliteal vein.  A filter placement is planned to prevent embolization.  A section of the patient's abdominal CT at the level of L2 is shown in the image below.  The filter will most likely be placed in which of the following structures?

• A)A
• B)B
• C)C
• D)D