How is warmed isotonic crystalloid administered?

• A. Warmed isotonic crystalloid is infusing via blood tubing at a controlled rate.
• B. Warm isotonic crystalloid is infusing via a separate IV line at a rapid rate.
• C. Cold isotonic crystalloid is infusing via blood tubing at a controlled rate.
• D. Isotonic crystalloid is warmed but infused without rate control.

Answer: (A)

Maintaining normothermia during resuscitation by warming fluids and controlling the infusion rate. Warmed isotonic crystalloid should be delivered through IV tubing via a fluid-warming device so the fluid reaches near body temperature as it infuses. Keeping the rate controlled ensures you deliver the right volume at a pace that supports circulation while preventing overheating of the fluid and the patient. Infusing warm fluid without a warming setup or at an uncontrolled rate, or using cold fluid, increases the risk of hypothermia and hemodynamic instability. Therefore, the correct approach is warmed isotonic crystalloid administered through blood tubing with a controlled infusion rate.