The duplex venous ultrasonography test is used to:
a. diagnose a blood clot below the knee.
b. identify a saddle embolism.
c. diagnose a blood clot behind the knee or thigh.
d. identify a pulmonary infarction.
C
The duplex venous ultrasonography test is very accurate for diagnosing a blood clot behind the knee or thigh. It is not useful for any of the other listed options. Other tests would be needed.
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