Transrectal Ultrasound (TRUS)

Definition - What does Transrectal Ultrasound (TRUS) mean?

Transrectal ultrasound (TRUS) is an ultrasound procedure used in the evaluation of male infertility, particularly in regards to abnormalities with ejaculation. In this process, an ultrasound wand is placed in the rectum in order to view the ejaculatory tract for any abnormalities that may impact ejaculation and the delivery of healthy, viable semen.

FertilitySmarts explains Transrectal Ultrasound (TRUS)

The male ejaculatory tract consists of the ejaculatory duct, prostate, and seminal vesicles. A transrectal ultrasound (TRUS) is able to view these structures in real time.

A TRUS is a normal step in the assessment of the infertile male and can be used to evaluate ejaculatory duct disorders often characterized by:

  • Painful ejaculation
  • Low or bloody ejaculate fluid (hematospermia)
  • Low volume of ejaculate (hypospermia)
  • Low sperm count
  • The absence of viable sperm (azoospermia)

Issues often diagnosed via TRUS include ejaculatory duct obstruction (EDO), where calcification, cysts or scar tissue might cause difficulties in ejaculation. In some situations, TRUS may be used in treatment to remove cysts anywhere along the ducts.

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