Why does OncoK9 require so much blood? The 14-17mL required is more blood than what standard laboratory tests require.

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• How much blood is required? What are the blood collection requirements for OncoK9?

  A total blood volume of 14-17mL (7-8.5mL per blood tube) collected in two Roche® cell-free DNA tubes is required. Each tube must have a minimum of 7mL of whole blood to ensure adequate additive-to-blood ratio. See minimum fill line found on the side ...

• Why does the test take more time than other blood tests to generate a result?

  The majority of standard blood-based tests performed in veterinary medicine measure an analyte that is readily detectable in blood using a simple biochemical measure (e.g. to test blood glucose, glucose reacts with glucose oxidase on a test strip and ...

• Can other tests be run at PetDx with the submitted blood sample?

  No, samples submitted to PetDx are only tested using the OncoK9 test. The entire 14-17 mL sample of blood is used to perform the OncoK9 test.

• What are Roche® cell-free DNA blood collection tubes?

  Roche cell-free DNA blood collection tubes are a direct draw tube. When used with an appropriate multi-sample needle (e.g. Vacutainer®), these sterile tubes rely on the vacuum within to draw blood from the vein. This system allows for the collection, ...

• Why does the blood sample need to be collected within 15 minutes?

  In order to preserve the quality of the whole blood sample and ensure an appropriate additive to blood ratio, the entire contents of the tube need to be collected within 15 minutes of the initial tube puncture.  ​ In cases where your patient may need ...