Anti-reflux valve

• One-way valve that prevents 'reverse flow'

Anti-siphon check valve

• One-way valve that:
• prevents 'reverse flow'
• with higher opening pressures to prevent inadvertent fluid flow caused by siphoning when tying into a higher flowing line

Drug infusion

• Administer by a syringe pump via an infusion set with an anti-siphon valve
• to prevent inadvertent flow to patient from an unclamped or damaged syringe

IV fluids

Ideal-use volumetric pump

• Run IV maintenance fluid via a volumetric pump to a Luer connector without a valve. See figure 1

Gravity set with anti-reflux valve

• Use only for drug infusions where inadvertent administration of the drug infusion or the fluid infusion at an unintended rate would not be clinically unsafe 
• e.g. not for insulin, vasopressors, inotropic agents
• use only if a volumetric pump is not available, or the IV fluid line is removed from the pump
• Fit an anti-reflux valve to prevent reverse flow of drug into bag. See figure 2
• gravity sets incorporating an anti-reflux valve are available

Assembly

• Connect drug infusion syringe to a line with an anti-siphon valve
• run infusion through line
• place syringe into syringe driver
• Connect IV fluid to an administration set running through a volumetric pump to a Luer lock (Figure 1) OR to an administration set to an anti-reflux valve (Figure 2)
• run IV fluid through administration set
• Connect each into one of the double ends of a two-way needle-free extension set
• run IV fluid through extension set
• Connect the single end of the two-way needle-free extension set into the cannula