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ASK THE VET: Diabetes tests made for humans aren’t reliable for pets

by Lee Pickett, VMD / Creators | September 19, 2022 at 1:55 a.m.

Q: I have diabetes and test my blood sugar with a glucose meter. My cat Floyd has diabetes, too, and I want to use my meter to test his blood. My veterinarian recommends the AlphaTRAK veterinary meter instead. Is there really a difference?

A: The AlphaTRAK glucose monitoring system requires a much smaller drop of blood, 0.3 microliter, than human meters, which need 2 to 4 microliters.

The real advantage, though, is that the AlphaTRAK is more accurate for pets than human meters, which report incorrectly low levels of blood sugar, called glucose, when testing cat or dog blood.

In one study in which results were classified as low, normal or high, five human glucose meters incorrectly classified 39% of the pets' blood glucose levels. When results are so inaccurate that they fall into the wrong diagnostic category, the decision to increase or decrease an insulin dose will be needlessly incorrect, endangering the pet's life.

This problem arises because of the difference between human and pet blood. In humans, 58% of the glucose circulates in the watery portion of the blood, called the serum — compared with 93% for cats — with the remainder in the red blood cells.

Glucose meters measure the total glucose in the blood and translate it to a serum glucose number. That's the number veterinarians and physicians are accustomed to, since large testing laboratories report serum glucose levels.

AlphaTRAK meters register values that are within 1% of those reported by a large veterinary testing laboratory. So, using the AlphaTRAK helps you and your veterinarian make valid decisions about whether and how to change Floyd's insulin dose.

Another good veterinary glucose meter is the VetMate. Research shows that the AlphaTRAK and VetMate glucose meters are the most accurate in pets.

By the way, home testing of blood sugar is especially important for cats, who often develop stress hyperglycemia, an abnormally high blood sugar level induced by stress, when they're at the animal hospital.

So, it's best to use a veterinary glucose meter to test Floyd's blood at home. For more information, visit veterinarypartner.vin.com and search for the term "diabetes."

Q: My partner and I disagree about whether our dog June should ride loose in the back seat of the car or sit in the front seat, where she's usually on the passenger's lap or between us. What's your advice?

A: It's safest for both you and June if she rides in a carrier or crate secured in the back of the car.

If she's small, she can ride in a carrier held in place by a seatbelt. If you have a station wagon, van or SUV, June can travel in a crate anchored to the back walls of the vehicle. If she's large but your car isn't roomy enough to accommodate a crate, fit her with a harness secured to a seatbelt in the back.

If June is in the front seat while you drive, she can wander around your feet or distract you and cause a wreck. In a crash, she is likely to be injured and slam into you, jeopardizing your control of the car.

Proper back-seat restraint prevents these problems. And it keeps June from jumping from the car and getting hit by the vehicle behind you.

Buy a carrier, crate or harness certified by the nonprofit Center for Pet Safety. After working with engineers to develop valid test procedures using dog and cat crash-test dummies, the center has been evaluating pet carriers, crates and harnesses that make claims about "testing," "crash testing" or "crash protection."

Visit their website at centerforpetsafety.org for a list of products that passed their rigorous tests and to view their crash test videos.

Lee Pickett, VMD, practices companion animal medicine in North Carolina. Contact her at

vet@askthevet.pet


Print Headline: Don’t use diabetes tests made for humans on pets

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