In clinical laboratories, the lavender-top vacuum tube for blood collection is a familiar sight. This color indicates the presence of Ethylenediaminetetraacetic acid, or EDTA, a key anticoagulant. The primary function of this additive is to bind calcium ions in the blood sample, effectively preventing the coagulation cascade. This action preserves blood in its liquid, whole-blood state, […]

A common question in clinical settings involves the proper handling of venous blood gas (VBG) samples after collection. Specifically, there is often uncertainty about whether these samples require immediate icing. The stability of analytes within a venous blood gas collection tube dictates the correct protocol. Adhering to the right procedure is necessary to maintain sample integrity

Accurate venous blood gas (VBG) testing depends on using the correct collection tube. Selecting the wrong tube can compromise sample stability, alter results, and delay clinical decision-making. Blood centers and laboratories benefit from understanding which tube is appropriate to maintain precise and reliable measurements. Proper tube selection ensures that results for oxygen, carbon dioxide, and