Pulsator™ Plus syringes, with a liquid sodium heparin concentration of 23.5 I.U. per mL, allowing blood sampling with minimal risk of sample dilution. The syringes use a specially formulated electrolyte-balanced liquid sodium heparin that offsets both binding and dilution factors by chemically pre-adjusting key electrolytes to normal blood levels. The syringes are available with a broad choice of product features.