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Kidney Disease in Dogs

Kidney disease in dogs can be caused by several factors; it can be a causal effect of the dog’s age, severe dehydration, a new or past trauma to the kidneys, or even tick borne diseases.

There are a lot of valuable pieces of information your veterinarian will be able to obtain from analyzing your dog’s urine sample if he suspects kidney disease. The vet will interpret the results of the urine test by reviewing the history of your pet, completing a physical exam – sometimes including blood work, and depending on the severity of the kidney disease, further testing may necessitate x-rays or ultrasound.

If obtaining a urine sample from your dog is difficult, try one of these different ways to collect the sample: The most common way to collect a sample from a larger dog is to use a clean, dry container, (you can even use an aluminum pie pan or cake pan, or a deep plastic dish that will hold the urine). After your dog has urinated, pour the sample into a clean container and seal it. Be sure to save the urine sample in a clean, dry container you can easily transport to your vet. The sample should be delivered to your veterinarian’s office immediately. If you are unable to deliver the sample immediately, refrigerate it but never freeze a dogs urine sample.

If your vet requires a sterile sample of urine to test for kidney disease you will need to take your dog to the vet’s clinic to undergo a procedure called “cystocentesis,”. The vet will insert a small needle directly into the dog’s bladder through the body wall. This procedure will not take long and will provide a sample uncontaminated by bacteria from anything outside the dog’s bladder, including its fur.

In addition to checking for kidney disease, a urinalysis will also provide information about your dog’s bladder, liver, pancreas, and other organs.

A complete urinalysis of your dog’s urine involves three steps:
1. Checking and recording the color, cloudiness, and how concentrated the urine is.
2. Completing a chemical analysis of the urine.
3. Centrifuging a small quantity of the urine sample and examining the sediment under a microscope.

Normal urine is amber-yellow in color and clear to slightly cloudy. Concentrated urine will be a darker yellow. White blood cells can also make the urine cloudy. If there is blood in the urine it will have a reddish-brownish shade.

Many of the chemical tests for kidney disease can be done using only a small quantity of urine. A dipstick is used to transfer a small amount of urine to special medical pads containing chemical reagents that test for a particular material in the urine. When the urine comes in contact with one of the reagents a chemical reaction occurs and the color of the pad will change based on how much of the substance is in the urine. The vet will then compare the pad with a color chart to determine approximately how much of the substance is in the urine. Some medications may interfere with the chemical tests causing false results and your veterinarian will need to know about any medications or supplements your dog is taking.

The following substances are just a few of the chemicals that are tested when performing a routine urinalysis to test for kidney disease:
Urine pH – (a reading of how acidic or alkaline the urine is).
Protein – (healthy dogs usually don’t have any protein in their urine, although sometimes trace amounts may be present but that is normal.
Glucose – (sugar in the blood being significantly higher than normal.
Ketones – (substances formed in the body during the breakdown of fats).
Bilirubin – (a pigment made by the liver from dead or dying red blood cells).
Urobilinogen – (Big word for a compound formed from bilirubin by intestinal bacteria).

Blood cells in the urine are normal, but a larger than normal quantity indicates a problem.

An examination of the urine sample under a microscope tests for several problems and larger than normal numbers of white blood cells may indicate inflammation from a bladder or kidney infection.

Kidney disease is a very serious health problem for dogs, just as it is for humans. If you are concerned that something is just not right with your dog, you definitely should make an appointment with your vet as soon as possible.

 

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