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If your cat is straining to urinate and producing little or no urine each time, it may be suffering from a urinary tract obstruction. The obstruction may be due to inflammation or compression on the urethra, or simply a blockage. Treatment is available and the prognosis of this issue will depend on the severity of the obstruction.
Urinary tract obstruction occurs mostly in male cats, but dogs and female cats may also be affected. If you would like to learn more about how this disease affects dogs, please visit this page in the petMD library.
The first sign of a urinary obstruction is straining to urinate. This may actually look like constipation since the cat may be seen going to the litter pan more often and hunching over in pain. Because of the abnormal passage of urine, the stream or flow of urine will be interrupted and may appear cloudy. If any urine is seen, it may appear dark or blood-tinged.
The pain involved causes many cats to cry out and they will stop eating and become depressed. Vomiting or retching may also occur. If the cat does not receive medical treatment, renal failure can develop, which can be life threatening within three days of symptoms.
There are several known risk factors for a urinary tract obstruction including urinary tract stones, urinary disease (particularly common in female cats), and prostate disease (in male cats).
The accumulation of minerals in the urinary tract can also cause the formation of an obstruction (crystals or stones). In addition, tumors, lesions, and scar tissue can lead to an obstruction.
The veterinarian will carefully feel the cat's abdomen. Acute renal failure results from the increased pressure in the renal system and the inability to eliminate urea and other waste products usually eliminated in urine. This results in increased waste products and potassium in the bloodstream. An initial baseline blood panel is important to determine the appropriate fluids and other treatment that may become necessary.
As the treatment progresses, additional blood samples will likely be taken to determine changes in the cat's condition. Additional blood analysis and imaging, including X-rays or ultrasound may be helpful to determine the cause of the obstruction or other contributing diseases or illnesses.