What is the correct Sodium Bicarbonate dosing for Crush Syndrome when indicated?

What is the correct Sodium Bicarbonate dosing for Crush Syndrome when indicated?

• A. 1 mEq/kg
• B. 25 mEq IV
• C. 50 mEq IV/IO over 2 min
• D. 100 mEq IV

Answer: (C)

When muscles are crushed, a surge of myoglobin and potassium can injure the kidneys. Giving sodium bicarbonate helps by alkalinizing the urine, which keeps myoglobin more soluble and reduces its tendency to form kidney-blocking casts. A rapid 50 mEq IV or IO bolus over about 2 minutes is used because it quickly raises bicarbonate levels and urine pH to a protective range, making the treatment effective even before a patient’s weight can be measured. Smaller doses (like 25 mEq) may not achieve the needed urine alkalinization, and a much larger dose (such as 100 mEq) can risk metabolic alkalosis or fluid-electrolyte disturbances in a trauma patient. A weight-based dose (1 mEq/kg) isn’t as practical in the field and doesn’t guarantee the same rapid, reliable urinary pH improvement in emergency crush injuries.

When muscles are crushed, a surge of myoglobin and potassium can injure the kidneys. Giving sodium bicarbonate helps by alkalinizing the urine, which keeps myoglobin more soluble and reduces its tendency to form kidney-blocking casts. A rapid 50 mEq IV or IO bolus over about 2 minutes is used because it quickly raises bicarbonate levels and urine pH to a protective range, making the treatment effective even before a patient’s weight can be measured.

Smaller doses (like 25 mEq) may not achieve the needed urine alkalinization, and a much larger dose (such as 100 mEq) can risk metabolic alkalosis or fluid-electrolyte disturbances in a trauma patient. A weight-based dose (1 mEq/kg) isn’t as practical in the field and doesn’t guarantee the same rapid, reliable urinary pH improvement in emergency crush injuries.