Feline Urinary Tract Obstruction (Blocked Cat / FLUTD Emergency)

Feline Urinary Tract Obstruction (Blocked Cat / FLUTD Emergency)

Feline Urinary Tract Obstruction (Blocked Cat / FLUTD Emergency)

Overview

Urinary obstruction is one of the most dangerous and time-sensitive emergencies in cats, especially males. It occurs when the urethra becomes blocked by crystals, mucus plugs, or inflammation, preventing the cat from urinating.

This causes:

  • Rapid toxin buildup in the bloodstream
  • Electrolyte imbalance (especially potassium)
  • Kidney failure
  • Cardiac arrest

Without treatment, death can occur in 24–48 hours.

Symptoms

  • Repeated trips to litter box with no urine
  • Crying or vocalizing while trying to urinate
  • Licking genital area excessively
  • Lethargy
  • Vomiting
  • Swollen abdomen
  • Collapse in late stages

Causes & Risk Factors

  • Male cats (narrow urethra)
  • Stress (major trigger)
  • Dry diet / low water intake
  • Urinary crystals (struvite, calcium oxalate)
  • Obesity
  • Previous FLUTD episodes

Treatment

Emergency stabilization:

  • IV fluids
  • Pain relief (opioids)
  • Blood potassium stabilization

Definitive treatment:

  • Urinary catheter placement under sedation
  • Bladder flushing
  • Hospitalization (24–72 hours typical)

Severe cases:

  • Surgery (urethrostomy) if recurrent obstruction

When to See a Vet

👉 Immediately — inability to urinate is always an emergency.

Prevention

  • Encourage hydration (wet food, fountains)
  • Stress reduction (environmental enrichment)
  • Prescription urinary diets (if recommended)
  • Weight management

References