Subcutaneous Ureteral Bypass (SUB) for Cats

Ureteral obstructions are becoming increasingly common in cats and can lead to serious health issues if left untreated. In a healthy cat, the kidneys filter waste from the blood to produce urine, which travels through the ureters to the bladder and then exits the body via the urethra.

However, some cats are prone to developing calcium oxalate stones, which can partially or completely block the ureters. These blockages can prevent urine from flowing properly, leading to kidney damage over time.

One of the challenges with ureteral obstructions is that symptoms are not always immediately noticeable. Some cats may show signs like reduced appetite, lethargy, or vomiting, but in other cases, the obstruction might go unnoticed until significant damage to the kidney has occurred. This is why early diagnosis is critical to prevent long-term complications.

How are ureteral obstructions diagnosed?

Diagnosing a ureteral obstruction requires a combination of blood and urine tests alongside imaging techniques like X-rays and ultrasound. Calcium oxalate stones are typically visible on X-rays, allowing your vet to pinpoint the exact location of the blockage. Ultrasound is also used to check for kidney enlargement or dilation in the renal pelvis, indicating that the kidney is struggling to pass urine.

In some cases, a dye test may be performed to further confirm the presence of a blockage and assess its severity. Once the obstruction is confirmed, a treatment plan can be created. One of the most effective treatments for ureteral obstructions is placing a Subcutaneous Ureteral Bypass (SUB) device.

What is a subcutaneous ureteral bypass (SUB)?

A SUB device is surgically implanted to help urine bypass the obstruction in the ureter. The device runs from the kidney to the body wall, allowing urine to flow freely without passing through the blocked ureter. This procedure is life-saving, especially in cases where the obstruction is severe and threatens the cat’s kidney function.

However, maintaining an SUB device requires regular flushing to prevent complications like mineral buildup or blood clots. Additionally, feeding your cat a wet diet can help reduce the risk of stone formation by increasing hydration and promoting healthy urine flow.

Monitoring and complications

Although the SUB device is highly effective, it’s not without risks. Cats with pre-existing urinary tract infections are at a higher risk for complications, so regular urine culturing and monitoring are essential to ensure the device continues to function correctly. Occasionally, blood clots can form, requiring a special drug to flush the system.

Despite these risks, the SUB procedure is often the best option for cats with ureteral obstructions. If you suspect your cat shows signs of a blockage, such as difficulty urinating or reduced energy levels, seek vet care as soon as possible. Early intervention can make a significant difference in preserving your cat’s health and well-being.

Are you worried about your cat’s health?

If you are concerned about your cat, please reach out to our friendly team. Call us on 1300 228 377 or fill out the contact form below. In an emergency, please contact your local vet.

For vets – to refer a patient or book a telehealth consultation, please call us on 1300 228 377, book through the portal or fill in the form.

Patient Stories

Our commitment to feline health is best seen in the stories of the cats we’ve had the privilege of treating. These journeys highlight the dedication, expertise and compassion that drive us.

Each patient faced unique challenges, and it was our honour to offer high-quality care and help them regain strength and happiness. We value the deep bonds with cats and their owners, knowing the difference we make in their lives.

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Contacting Us

Pet Owners
If you would like to talk about treatment for your cat, call us on 1300 228 377 or fill in the form.
In an emergency, please contact your local vet.

Vets and Nurses
To refer a patient or book a telehealth consultation please call us on 1300 228 377, book through the portal or fill in the form. For advice calls, please see the guidelines here.

1300 228 377

1-15 Lexington Rd,
Underwood, QLD, AU, 4119

Monday-Friday: 8 am-6 pm
Saturday/Sunday - Closed