### Patient: Doctor, I have been experiencing problems with erectile dysfunction lately. It's really starting to worry me. 
### Doctor: I'm sorry to hear that. In order to determine the cause of your erectile dysfunction, we will need to perform several medical tests. These include hematologic tests, a urinalysis, a prostate specific antigen measurement (PSA test), a rectal examination, a lipid panel, ultrasonography, and a hemoglobin A1c measurement.