The small, delicate veins of many companion pets pose venous blood collection challenges. Pre-evacuated tubes can easily collapse fragile veins, while a gentler collection with a syringe requires a transfer and can result in insufficient sample quality. The innovative S-Monovette multi-sampling, closed blood collection system provides a choice of collection technique to accommodate varying vein conditions. • EDTA- EDTA K₃ is pre-dosed as a liquid preparation in an average concentration of 1.6 mg EDTA/ml blood. The maximum dilution caused by the liquid preparation is lower than 1%. Although the EDTA preparation may dry during storage, this does not in any way impair its anticoagulant effect.