What are the two most common collection errors in blood draws?

The selection of under filling and inadequate mixing as the two most common collection errors in blood draws highlights significant factors that can affect the quality and reliability of laboratory results.

Under filling occurs when the blood collection tube is not filled to the required volume, which can compromise the analysis. This is particularly crucial for tests that require a specific blood-to-additive ratio, such as coagulation tests. Insufficient volume can lead to inaccurate results, necessitating the recollection of the sample.

Inadequate mixing refers to the process of ensuring that the blood and any additives in the collection tube are thoroughly mixed. For instance, in tubes containing anticoagulants, it is imperative to mix the sample immediately after collection to prevent clotting. Failing to do so can result in hemolysis or clot formation, skewing test results and potentially leading to misdiagnosis or incorrect treatment.

Overall, both under filling and inadequate mixing are critical considerations for laboratory assistants and phlebotomists to ensure accurate and reliable patient results. By focusing on these aspects, it becomes clear that correct techniques during the collection process are fundamental to the integrity of laboratory diagnostics.