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Sample Collection and Preparation

Storing Urine Samples

For a Urine P:C Ratio, the urine sample should be analyzed within four hours of

collection. If this is not possible, you can refrigerate the sample at

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up to three days.

Analysis of Stored Samples

Serum or Plasma Samples

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Mix the samples gently, but thoroughly, by inversion. t Do not shake.

Centrifuge the samples to remove any ﬁbrin particles that may have formed t

during storage.

Analyze the samples immediately after centrifugation. t

Urine Samples

For refrigerated urine samples, be sure the samples have come to room temperature

before analysis.

Combined Chemistry and Hematology Sample Preparation

When performing an analysis using both the chemistry and the hematology analyzers,

it is necessary to collect two tubes of blood because the sample requirements for

clinical chemistry and hematology testing are different. Chemistry testing on the VetTest

requires serum or plasma.

Note: A urine analysis on the VetTest analyzer can only be run with urine protein slides

or urine creatinine slides and when performing UPC ratios.

Hematology requires whole blood mixed with EDTA anticoagulant. We recommend

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the manufacturer’s speciﬁcations).

To prepare blood for both chemistry and hematology testing:

Draw a sample into a new syringe. Do not heparinize. 1.

Without delay, gently transfer the sample into two separate tubes:2.

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EDTA tube for hematology testingt

Important: You must immediately transfer the sample to keep it from clotting.

Follow the instructions for serum or plasma sample preparation as described 3.

earlier in this section. Follow the sample preparation instructions in the

hematology analyzer’s manual for hematology sample preparation.

Important: Do not use EDTA for chemistry testing. EDTA can cause

interference with many analytes.

Idexx VetTest User Manual

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