Adult Sickle Cell: What is the initial Normal Saline bolus?

• A. Normal Saline: 500 mL IV/IO
• B. Normal Saline: 1000 mL IV
• C. Normal Saline: 250 mL IV
• D. Normal Saline: 750 mL IV

Answer: (A)

Hydration is key in adult sickle cell crisis because getting enough isotonic fluid into the bloodstream helps dilute the blood, improves microvascular flow, and reduces red blood cell sickling. The initial Normal Saline bolus is 500 mL given IV or IO, chosen to rapidly restore intravascular volume without risking fluid overload. isotonic saline supports quick volume expansion and perfusion, whereas larger boluses (like 750–1000 mL) raise the chance of edema or fluid overload in adults with possible concurrent heart or kidney issues, and a smaller 250 mL dose may not adequately address dehydration. After the bolus, reassess vitals and fluid status and proceed per protocol if more volume is needed.