How to Do a Clean Catch Urine Sample


Veterinarians use a urinalysis test to access your pet's kidneys and urinary system. A complete urinary test can detect kidney, liver disease and diabetes at early stages to treat these diseases at the onset. It is of the utmost importance that a urine sample is sterile so bacteria is not introduced into the test results as a false positive.

Clean Catch Sample

Things You'll Need

  • Sterile catch container
  • Urine collection tube

Watch your cat and his litter box habits. When he approaches the litter box and starts to urinate, slide the sterile catch container from your veterinarian under the urine stream.

Open the urine collection tube package by peeling the two halves apart. Remove the tube and pull and twist the green cap to remove it from the syringe. Insert the clear plastic tube from the package onto the tip of the syringe. Set the tip into your pet's urine and pull out the plunger on the syringe to suck it into the syringe. You only need about 2 teaspoons of urine for a urinalysis test.

Rotate the syringe back and forth to distribute the boric acid in the syringe in the sample. Pull out the plunger until you see a break line and break off the plunger. Remove the clear plastic tube from the syringe tip and replace the green cap on the syringe's tip.


    • This is the most difficult urine catch method.
    • Your veterinarian can provide you with a catch container and a collection tube.
    • Boric acid stabilizes the urine sample so it needs no refrigeration before you take it in to your veterinarian.

Plastic Wrap Method

Things You'll Need

  • Plastic wrap
  • Plastic zipper lock bag

Many cats want complete privacy when using the litter box and will not allow someone to place a urine catch tray underneath while urinating. The plastic wrap method of urine collection allows your cat his privacy.

Pick up your cat's litter box and place the loose end of plastic wrap near the middle underneath the litter box. Stretch the plastic wrap along the bottom, up one side and down to the top of the litter, across the litter up the other side and underneath the litter box.

Smooth the plastic wrap down so it touches the litter and is smooth against the walls on the inside of the litter box.

After your cat urinates on the plastic, remove it carefully from the litter box and pour it into a plastic zipper bag.

Store the bag of urine in the refrigerator if you can't get it to your veterinarian within one to three hours after collection.


  • Some cats may not use the litter box with plastic wrap because it doesn't feel right underneath the feet.

Plastic Pellet Method

The plastic pellet method of urine collection is the easiest method that involves a little trickery on your cat.

Things You'll Need

  • Plastic pellets
  • Aquarium gravel (optional)
  • Plastic container (optional)

Pour commercial plastic pellets into your clean litter box and retain the container. Your cat will scratch the pellets and use the litter box as normal. Plastic pellets do not absorb liquids, but make your cat think nothing is out of the ordinary in his litter box.

After your cat urinates in the plastic pellets, open the container and pour some of the pellets and urine back into the container. Screw the lid on tightly and store in the refrigerator if you can't get it to your vet within three hours.


  • You can substitute aquarium gravel for the commercial plastic pellets and any disposable plastic container with a lid for storage.


  • If your cat is an outdoor cat, keep him inside until he leaves a urine sample in the litter box.

    If you have multiple cats in your house, isolate the one you are getting a urine sample from in one room with the litter box to ensure the sample is from the correct cat.

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