Question

A phlebotomist has an order for a blood draw to test erythrocyte sedimentation rate (ESR) and protime (PT). The phlebotomist
chooses a light blue-top microtube to collect each test and collects the PT first. What errors have been made?

Answer 1

Answer:

1. Tube Selection Error: Light blue-top microtube is not suitable for ESR testing.

2. Collection Order Error: PT sample should be collected before the ESR sample.

Explanation:

In the scenario described, the phlebotomist has made a couple of errors:

Tube Selection: Light blue-top microtubes are typically used for coagulation studies, including prothrombin time (PT) testing. However, they are not suitable for erythrocyte sedimentation rate (ESR) testing. ESR testing usually requires tubes with no anticoagulant or tubes containing sodium citrate.

Collection Order: PT testing involves analyzing the clotting factors in the blood, and it is generally recommended to collect these samples before collecting samples for tests that require anticoagulants, like ESR. The order of collection can affect the accuracy of test results.

To correct these errors, the phlebotomist should:

Choose an appropriate tube for ESR testing (e.g., a tube without anticoagulant or a tube with sodium citrate).

Consider collecting the PT sample first before the ESR sample to maintain the accuracy of the coagulation studies.

These errors highlight the importance of proper tube selection and the sequence of blood collection to ensure accurate laboratory test results.