When treating hypotension, crystalloid fluids should be administered at rates of how many mL/kg/hr?

When treating hypotension, crystalloid fluids should be administered at rates of how many mL/kg/hr?

• A. 2 to 4
• B. 5 to 10
• C. 10 to 20
• D. 30 to 40

Answer: (C)

Restoring intravascular volume quickly with isotonic crystalloids is the goal when someone is hypotensive, because increasing preload improves cardiac output and improves perfusion to vital organs. The best rate is a middle-ground infusion: fast enough to support blood pressure and tissue perfusion, but not so aggressive that you overwhelm the circulation and risk edema or fluid overload. This moderate rate achieves that balance better than the slower options, which may leave perfusion inadequate for longer, or the very rapid option, which can cause pulmonary or systemic edema. In practice, you monitor the patient’s response—blood pressure, urine output, mental status, and signs of fluid overload—and adjust the rate accordingly.

Restoring intravascular volume quickly with isotonic crystalloids is the goal when someone is hypotensive, because increasing preload improves cardiac output and improves perfusion to vital organs. The best rate is a middle-ground infusion: fast enough to support blood pressure and tissue perfusion, but not so aggressive that you overwhelm the circulation and risk edema or fluid overload. This moderate rate achieves that balance better than the slower options, which may leave perfusion inadequate for longer, or the very rapid option, which can cause pulmonary or systemic edema. In practice, you monitor the patient’s response—blood pressure, urine output, mental status, and signs of fluid overload—and adjust the rate accordingly.