Flexible metallic stents can be placed in patients with urethral
obstruction. This may be due to scarring (which can occur following
traumatic injury) or tumor (arising from the urethra or the
prostate). These stents are placed using fluoroscopic guidance
under brief general anesthesia. The improvement in urine
flow is immediate and most patients are discharged the
The image on the left shows normal urethra in this male dog.
The image on the right is taken from the area affected by the
tumor. The cancerous tissue is irregular and fills the lumen of the
In this fluoroscopic image, we can see the stent placed over
a guidewire in the affected section of the urethra. The tumor in
the prostate has filled with the contraast agent.
The stent has been deployed; the mesh is now visible in the
middle of the image.