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Clotting Times

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Megan Brashear, CVT, VTS (ECC), demonstrates how to obtain blood to perform a PT and aPTT bedside clotting tests in a dog.

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Megan Brashear's picture
Megan Brashear

CVT VTS(ECC)

Enrolled: 07/2011

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FELICIA  JACKSON's picture

If there are not two CoAg machines available, what would be the process at that point since the blood can't sit in the syringe due to clotting? Would you just put the sample in a blue top tube (citrate) and then run the test from there?

Chelsea Lincoln's picture

Great question, Felicia! I asked our surgery tech, James Reid, CVT, and he said, “This actually happened to me last week. One of our machines was down. I made the decision to get two different fresh blood samples and run the PTT followed by the PT. I made this decision because the dog had multiple healthy veins that had not been poked yet. If I was low on sample sights (veins that had already been poked, trauma, or catheterized) I would have used a citrate tube. Hope this helps!”