Urinary blockages are one of the most serious emergencies we see in male cats. When a cat cannot urinate, toxins quickly build up in the body, causing severe pain and, without treatment, death. For some cats, perineal urethrostomy (PU) surgery can be a life-saving solution.
Here’s what cat owners should know about PU surgery, recovery, and long-term care.
Why Do Male Cats Get Urinary Blockages?
Male cats have a very narrow urethra (the tube that carries urine out of the body). Because it is so small, it can become blocked in two main ways:
• Cystitis: Inflammation of the bladder and urethra, often linked to stress, which causes the urethra to spasm and close.
• Crystals or stones: Minerals in the urine can form gritty material or stones that clog the urethra.
When a cat cannot urinate, the bladder becomes painfully overfilled and dangerous toxins accumulate in the bloodstream. This is a medical emergency that requires immediate care.
What Is a Perineal Urethrostomy (PU)?
A perineal urethrostomy, or PU, is a surgical procedure most commonly performed in male cats that have repeated urinary blockages.
During the surgery, the narrow portion of the urethra is removed and a new, wider urinary opening is created. This new opening is large enough to allow urine to pass even if inflammation or crystals are present.
PU surgery is considered a salvage or last-resort procedure. It does not cure the underlying urinary condition, but it greatly reduces the risk of future life-threatening blockages.
What Is Recovery Like?
PU surgery is an invasive procedure, so recovery requires close attention at home.
Pain Management
Cats are often discharged with medications to control pain, reduce swelling, and prevent infection. These may include:
- Strong pain medication (buprenorphine)
- Gabapentin for pain and anxiety
- A steroid to reduce swelling at the surgery site
- Antibiotics
The First Night After Surgery
The first night can be challenging. Cats may be restless or vocal due to anesthesia and discomfort. Urination may sting at first, and some bleeding is normal during the initial healing period.
A cone (E-collar) must stay on at all times to prevent damage to the surgical site. Owners should check on their cat frequently, especially the first night.
Caring for Your Cat at Home
- Activity should be restricted for the first 10–14 days
- Monitor closely to be sure your cat is urinating regularly
- Use paper or non-dusty litter at first to protect the incision
- Keep your cat in a small, easy-to-clean area during recovery
- Be prepared to give medications and replace the cone if needed
Your involvement at home is critical to a successful outcome.
Risks and Long-Term Considerations
Like all surgeries, PU carries risks. Short-term risks include bleeding or swelling that could temporarily block urine flow. Long-term risks include:
- Increased risk of bladder infections
- Scar tissue that may narrow the new opening over time
The success rate is approximately 85%, meaning most cats do very well. However, some cats may require additional treatment or hospitalization if complications occur.
Life After PU Surgery
PU surgery treats the blockage, not the underlying cause. Long-term care often still includes:
- Prescription urinary diets
- Regular monitoring for urinary tract infections
- Stress reduction at home
With proper care and monitoring, many cats go on to live comfortable, happy lives without repeated urinary blockages.
Final Thoughts
Deciding on PU surgery can feel overwhelming, but for cats with repeated blockages, it can be life-saving. If you have questions about whether PU surgery is right for your cat, talk with your veterinarian—they can help guide you through the decision and recovery process.