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Penile Doppler Ultrasound or CDDU (Colour Doppler Duplex Ultrasound)



CDDU or Penile Doppler ultrasound with PGE1, or prostaglandin E1, is a specialized variation of the penile Doppler ultrasound procedure. PGE1 is a medication that can be used to induce an artificially stimulated erection during the ultrasound examination to assess the blood flow in the penis.

This procedure is often performed when there are concerns about vascular insufficiency or arterial blockages contributing to erectile dysfunction (ED).


Penile Doppler ultrasound procedure with PGE1:

1. Preparation: Before the procedure, the patient may be asked to disrobe from the waist down and lie on an examination table.

2. Medication administration: The healthcare provider will apply a local anesthetic cream to the penis to minimize any discomfort. Then, a small dose of PGE1, often in the form of an injection, is administered into the side of the penis. The medication helps relax the blood vessels and promotes increased blood flow, leading to an erection.

3. Ultrasound imaging: Once the erection is achieved, the penile Doppler ultrasound scan is performed. The transducer, a handheld device that emits and receives sound waves, is gently moved over the penis to capture images and assess the blood flow. The Doppler effect is utilized to measure the speed and direction of blood flow within the arteries and veins.

4. Evaluation: The images and Doppler waveforms obtained during the procedure are analyzed by a specialist, such as a radiologist or urologist. They will assess the blood flow patterns, identify any abnormalities, and determine the extent of vascular insufficiency or blockages, if present.


Penile Doppler ultrasound with PGE1 allows for a more accurate evaluation of the blood flow dynamics in the penis, especially during a stimulated erection. This information can help guide treatment decisions, such as determining if the patient is a suitable candidate for certain therapies like penile prosthesis placement or vascular surgery. It provides valuable insights into the underlying causes of ED and aids in tailoring an appropriate treatment plan.





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