Feline FUS

Feline Urologic Syndrome ‘FUS’ or cat Urinary Obstruction is a common syndrome in male cats. This condition is known in veterinary parlance as a ‘blocked tom’ or ‘blocked cat’. The urethra of male cats is narrow, particularly close to the tip. Consequently, any sediment, mucous, or stones coming from the urinary bladder passing through the urethra could block the penile urethra. If the flow of urine stops, waste products such as Blood Urea Nitrogen, Creatinine, and Potassium build up in the bloodstream, causing azotemia and hyperkalemia (an increase in potassium in the blood).

The first sign of a urinary obstruction is straining to urinate. This may actually resemble constipation, as the cat may be seen going to the litter pan more often and hunching over in pain. Due to the abnormal passage of urine, the stream or flow of urine will be interrupted and may appear cloudy. Urine may appear dark or blood-tinged. Moreover, the pain involved causes many cats to cry out, and they will stop eating and become depressed. Vomiting or retching may also occur. Without prompt medical treatment, renal failure can develop, which can be life-threatening within three days of symptoms.

Signs of urinary obstruction

Cats that are blocked often show the following signs:
• Repeatedly visiting the litter box (noting or few drops of urine produced often mistaken for constipation)
• Straining
• Crying or howling
• Licking at the genitals
• Hiding
• Painful abdomen
• Vomiting
If you notice your cat showing any of the above signs, get right in to see an emergency veterinary services. Don’t wait as a few hours can make a big difference. Cats with urinary obstruction require immediate urinary catheterization to release the urine, any delay can result in kidney damage or death.
The course after unblocking these cats is just as unpredictable. Some cats could recover and never to suffer another episode, while others will have repeated urinary obstructions in days, weeks, or years later.
If you notice one or more of these symptoms contact your veterinarian or call our veterinary emergency clinic in Newmarket Aurora area at 905-898-1010