Why Your Veterinarian Goes Crazy for a Urine Sample from Your Pet

January 28, 2015

pet urine sampleWhile it is not unusual for a pet to have an accident in The Animal Medical Center waiting room or while standing on an examination table, my reaction to that accident may be considered unusual. As the embarrassed pet family is grabbing for a paper towel or a tissue to mop up, I blurt out “stop” so I can get a syringe to collect the urine for analysis in the laboratory.

18 Tests in One Tube
At The Animal Medical Center, a urinalysis tests 18 different parameters from just a teaspoon of urine. Some of the parameters are assessed visually, like color and clarity. A special dipstick measures six values simultaneously – especially important here are glucose and ketones – indicators of potential diabetes. The urine is spun in a centrifuge and the material that collects on the bottom of the test tube is specially stained and evaluated under the microscope. Finally, a drop or two of urine is placed on a refractometer, a device that measures the specific gravity and assesses how concentrated the urine is.

A Snapshot of Your Pet’s Health
The results from tests performed on that teaspoon of urine I have collected off the table or floor gives me a whole lot of information about your pet’s health. The finding of red and white blood cells and bacteria when the urine is evaluated under the microscope suggests a urinary tract infection. Observation of crystals in the urine is common and may not represent disease, but if your pet has bladder stones, the presence of crystals gives a hint as to the type of stones, and knowing the type of stone makes treatment more specific and successful. For example, the presence of ammonium biurate crystals in a dog with bladder stones suggests the presence of an abnormal liver blood vessel, and the presence of struvite crystals in a dog with a urinary tract infection and bladder stones suggests struvite stones. In addition to filtering the blood to remove waste products from the body, the kidneys help maintain the body’s water balance. Drink too much and they excrete the excess, drink too little and they hang on to every molecule of water they can. When the kidneys don’t work well, they lose the ability to dilute and concentrate the urine. Measurement of a urine specific gravity, part of a routine urine test, helps veterinarians assess the kidney’s ability to dilute and concentrate and is a partial measure of kidney health.

So much information from something you, the pet owner thought was just an accident. No wonder I am crazy about getting that urine sample from your pet.

Take the Kidney Kwiz in Honor of World Kidney Day

March 9, 2011

World Kidney Day (March 10, 2011) serves to remind us how important early detection and treatment of kidney disease is in our pets. Estimates indicate 0.5-1.5% of dogs and 1-3% of cats seen in veterinary clinics suffer from kidney disorders. The Animal Medical Center’s Renal Medicine Service, headed by Dr. Cathy Langston, has developed a Kidney Kwiz to test your knowledge about your pet’s kidneys and how veterinarians manage kidney disease. To test your Kidney IQ, read the blog below and click on the link to the Kwiz at the end of the blog. Good luck to all.

Cats, dogs, birds and small mammal pets all have 2 kidneys. The kidneys are multitasking organs. It is common knowledge that kidneys clean the blood of the waste products of daily metabolism, but did you know they also maintain normal water balance in the body? Hence, one sign of kidney disease in pets is an increase in water consumption. Much less well known is the kidneys help to regulate blood pressure and produce hormones to simulate red blood cell production in the bone marrow, preventing anemia.

One test to help detect kidney disease is evaluation of a urine sample. Your veterinarian will love you if you collect a urine sample from your pet and take it to you pet’s routine physical examination. If your pet is diagnosed with kidney disease, your veterinarian will want to monitor blood pressure and also will prescribe a kidney friendly diet. High blood pressure (hypertension) is common in pets with kidney disease, 20% of cats with kidney disease and 75% of dogs have hypertension. Kidney disease in dogs and cats can be treated. The most important treatment you as a pet owner can give to your pet with kidney disease is to follow your veterinarian’s prescription for feeding a kidney friendly diet. Kidney friendly diets are designed to decrease the workload on the kidneys and have been proven to lessen clinical signs and prolong survival in pets with moderate to advanced stage kidney disease.

Are you ready to take the Kidney Kwiz?

This blog may also be found in the “Tales from the Pet Clinic” blog from WebMD.


For over a century, The Animal Medical Center has been a national leader in animal health care, known for its expertise, innovation and success in providing routine, specialty and emergency medical care for companion animals. Thanks in part to the enduring generosity of donors, The AMC is also known for its outstanding teaching, research and compassionate community funds. Please help us to continue these efforts. Send your contribution to: The Animal Medical Center, 510 East 62nd Street, New York, NY 10065. For more information, visit www.amcny.org. To make an appointment, please call 212.838.7053.

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