Fluid Bolus for Renal Colic: Current Practice

Area of Science:

• Nephrology
• Emergency Medicine
• Urology

Background:

• Intravenous fluid boluses are a standard emergency department practice for urolithiasis and acute renal colic.
• Historically, fluid administration aimed to promote ureteral flow, but evidence shows no benefit.

Purpose of the Study:

• To assess current intravenous fluid bolus administration practices in emergency departments for patients with urolithiasis.
• To determine if fluid boluses are administered based on established criteria for hypovolemia.

Main Methods:

• Retrospective analysis of emergency department visits for nephrolithiasis (ICD-9 592.0) with CT scans.
• Evaluation of intravenous fluid bolus incidence and correlation with hypovolemia indicators (BUN-to-creatinine ratio > 20, urine specific gravity > 1.030).

Main Results:

• 60.2% of patients with nephrolithiasis received intravenous fluid boluses.
• 79.12% of patients receiving fluid boluses did not meet criteria for volume depletion.
• No significant difference in hypovolemia rates between patients who received fluid boluses and those who did not.

Conclusions:

• The administration of intravenous fluids for urolithiasis in the emergency department is common, often without clear indication of hypovolemia.
• Current practices may be driven by historical habits rather than evidence-based guidelines for acute renal colic management.