Hematuria in Cats

Hematuria (Blood in Urine) in Cats

By: Dr. Bari Spielman

Section: Veterinary Care In-depth

Diagnosis In-depth

The following tests may be needed to diagnose the cause of hematuria:

  • Urinalysis to evaluate for white blood cells, red blood cells, crystals and bacteria.

  • Bacterial culture of urine to identify urinary tract infection and determine the best antibiotic to use to treat the infection.

  • A complete blood count to evaluate for systemic infection, anemia, or low platelet count (thromobocytopenia).

  • Serum biochemistry tests to evaluate kidney and liver function and to identify electrolyte and acid base disturbances.

  • A panel of clotting tests to assess whether the pet's blood can clot normally.

  • Vaginal cytology in intact female cats that may have vaginitis.

  • Abdominal X-rays to evaluate bladder and kidney size and identify stones dense enough to be visible on plain X-rays.


  • Abdominal ultrasound to evaluate the urinary tract for stones, tumors, obstruction to flow or evidence of infection in the kidneys themselves (pyelonephritis). Ultrasound often is recommended when other diagnostic procedures have been inconclusive. Completion of an ultrasound examination may necessitate referral to a specialty hospital.

  • A contrast dye study to evaluate the urinary tract for stones, tumors or obstruction. A contrast study of the upper urinary tract (kidneys and ureters) is called an excretory urogram or intravenous pyelogram. This study can identify obstruction of the upper urinary tract and signs of kidney infection (dilated kidney pelvis). A contrast study of the lower urinary tract (bladder and urethra) is called a cystourethrogram. This study can help identify bladder tumors or congenital abnormalities such as an outpouching of the bladder wall (urachal diverticulum). These tests may be recommended if other diagnostic tests were inconclusive.

  • Cystoscopy in female cats allows evaluation of the vagina, urethra, and bladder by introducing a rigid scope urethra and bladder. This technique allows the veterinarian to visualize congenital abnormalities of the urogential tract, tumors, stones and other abnormalities. It also allows for small biopsy samples to be obtained through the scope without the need for major abdominal surgery. Cystoscopy usually is done after other diagnostic procedures have been inconclusive. It necessitates general anesthesia and referral to a specialist.

    Treatment In-depth

    Treatment of hematuria depends on the underlying cause. Treatments for the common causes of hematuria are as follows:

  • Antibiotics are used to treat bacterial urinary tract infection. Ideally, the antibiotic should be chosen based on bacterial sensitivity testing to identify the antibiotic most effective for the particular type of bacteria causing the infection. However your veterinarian may make an educated guess about which antibiotic to use based on knowledge of the types of bacteria that commonly cause urinary tract infection and the ability of several antibiotics to be secreted into urine by the kidney tubules. Treatment generally is recommended for 2 to 3 weeks.

  • Fluid therapy may be recommended for pets that are dehydrated. It also may be recommended to increase urine output (establish a diuresis).

  • Dietary changes may be recommended if stones are present in the urinary tract or if kidney failure is present.

  • Vitamin K is the treatment of choice for hematuria secondary to warfarin (rat poison) ingestion.

  • Surgical intervention may be necessary for the removal of stones or tumors in the urinary tract or to correct congenital abnormalities. Surgery also may be necessary to determine wheter bleeding is coming from the left or right kidney in rare cases of "benign renal hematuria."

  • Chemotherapy may benefit in some animals with cancer of the urinary tract.

     
    Printable Version
     
    Have a Pet Question?
    Send Your Pet Question to Dr. Jon
    and His Staff of Veterinarians Ask Dr. Jon
    Dr. Jon's Newsletter
    Yes! Send Me the Latest Health Information, Pet Tips, Pet Stories and more...
     
     

    Related Articles

    • 1 Feline Idiopathic Cystitis (FIC)

      Feline idiopathic cystitis (FIC) literally means an inflammation of the urinary bladder in cats of unknown origin. It is also called feline idiopathic lower urinary tract disease (FiLUTD) or feline urologic...

      Read MoreRead More
    • 2 Urolithiasis (stones in the urinary tract) in Dogs

      Urolithiasis refers to the formation of stones in the urinary tract due to oversaturation of the urine with certain minerals. Calculi can be found anywhere in the urinary tract, but are most common in...

      Read MoreRead More
    • 3 Urinary Obstruction in Cats

      Feline urinary obstruction is an acute obstruction of the urinary tract and is most common in males. It is usually caused by a plug of inflammatory debris and crystals, which is part of the common syndrome...

      Read MoreRead More
    • 4 Acute Cystitis in Cats

      Acute cystitis is inflammation of the urinary bladder, and in cats it is not usually infectious in nature. The most common cause of lower urinary tract symptoms in cats is feline idiopathic cystitis (FIC),...

      Read MoreRead More
    • 5 Urinary Bladder Cancer in Cats

      Urinary bladder tumors are rare in cats, but of the possible cancers, transitional cell carcinoma is the most commonly diagnosed. This cancer is a malignant cancer usually arising from the inside surface...

      Read MoreRead More
  • Related Articles
    • 1Urolithiasis (stones in the urinary tract) in Dogs

      Urolithiasis refers to the formation of stones in the urinary tract due to oversaturation of the urine with certain minerals. Calculi can be found anywhere in the urinary tract, but are most common in...

      Read MoreRead More
    • 2Acute Cystitis in Cats

      Acute cystitis is inflammation of the urinary bladder, and in cats it is not usually infectious in nature. The most common cause of lower urinary tract symptoms in cats is feline idiopathic cystitis (FIC),...

      Read MoreRead More
    • 3Feline Idiopathic Cystitis (FIC)

      Feline idiopathic cystitis (FIC) literally means an inflammation of the urinary bladder in cats of unknown origin. It is also called feline idiopathic lower urinary tract disease (FiLUTD) or feline urologic...

      Read MoreRead More
    • 4Urinary Obstruction in Cats

      Feline urinary obstruction is an acute obstruction of the urinary tract and is most common in males. It is usually caused by a plug of inflammatory debris and crystals, which is part of the common syndrome...

      Read MoreRead More
    • 5Urinary Bladder Cancer in Cats

      Urinary bladder tumors are rare in cats, but of the possible cancers, transitional cell carcinoma is the most commonly diagnosed. This cancer is a malignant cancer usually arising from the inside surface...

      Read MoreRead More
     

    Over 10,000 Veterinarian Approved Articles

    Related Articles
    • 1Urolithiasis (stones in the urinary tract) in Dogs

      Urolithiasis refers to the formation of stones in the urinary tract due to oversaturation of the urine with certain minerals. Calculi can be found anywhere in the urinary tract, but are most common in...

      Read MoreRead More
    • 2Acute Cystitis in Cats

      Acute cystitis is inflammation of the urinary bladder, and in cats it is not usually infectious in nature. The most common cause of lower urinary tract symptoms in cats is feline idiopathic cystitis (FIC),...

      Read MoreRead More
    • 3Feline Idiopathic Cystitis (FIC)

      Feline idiopathic cystitis (FIC) literally means an inflammation of the urinary bladder in cats of unknown origin. It is also called feline idiopathic lower urinary tract disease (FiLUTD) or feline urologic...

      Read MoreRead More
    • 4Urinary Obstruction in Cats

      Feline urinary obstruction is an acute obstruction of the urinary tract and is most common in males. It is usually caused by a plug of inflammatory debris and crystals, which is part of the common syndrome...

      Read MoreRead More
    • 5Urinary Bladder Cancer in Cats

      Urinary bladder tumors are rare in cats, but of the possible cancers, transitional cell carcinoma is the most commonly diagnosed. This cancer is a malignant cancer usually arising from the inside surface...

      Read MoreRead More