Which IV solution should be obtained to hang with a unit of packed red blood cells (RBCs)?

The appropriate IV solution to hang with a unit of packed red blood cells (RBCs) is 0.9% sodium chloride, commonly known as normal saline. This isotonic solution is ideal because it matches the osmolarity of blood, thereby minimizing the risk of hemolysis of the RBCs when infused. It provides the necessary hydration and dilutes the blood components without causing any adverse reactions.

Using 0.9% sodium chloride helps maintain venous patency during the transfusion and provides a compatible environment that allows for the safe transport of nutrients and electrolytes alongside the transfused blood cells. This solution does not contain dextrose, which can lead to complications such as the rupture of the red blood cells due to the hypotonic nature that would occur once the dextrose is metabolized, making it unsuitable for this purpose.

Other IV solutions like 5% dextrose in water and 0.45% sodium chloride are hypotonic, which can cause fluid shifts that may lead to hemolysis or other problems during blood transfusions. Lactated Ringer's solution contains calcium, which can also react with the citrate used in blood products, leading to potential coagulation issues.

In summary, 0.9