sodium citrate
Medical term Routine Blood Collections
Anticoagulant that binds calcium, used in light blue-top tubes for coagulation tests. Fill to the line to keep the 1:9 citrate-to-blood ratio.
Sources
- WHO Guidelines on Drawing Blood: Best Practices in Phlebotomy (2010); official WHO IRIS PDF, also published as NCBI Bookshelf NBK138650 · World Health Organization
- Magnette A, et al. Pre-analytical issues in the haemostasis laboratory: guidance for the clinical laboratories. Thromb J 2016;14:49 · Thrombosis Journal (via PubMed Central)
- Order of Blood Draw Tubes and Additives (CLSI blog summary of GP41, Collection of Diagnostic Venous Blood Specimens; GP41-Ed7 was replaced by CLSI PRE02-Ed8, 2025) · Clinical and Laboratory Standards Institute
- Nikolac N, Supak-Smolcic V, Simundic AM, Celap I. Croatian Society of Medical Biochemistry and Laboratory Medicine: national recommendations for venous blood sampling (based on CLSI H3-A6). Biochem Med 2013;23(3):242-254 (PMC3900082) · Biochemia Medica via PubMed Central