urine_output_calculator: Urine Output Calculator

In cliot: Clinical Indices and Outcomes Tools

Urine Output Calculator

Description

Calculates urine output normalized by patient weight and time (mL/kg/hr). This metric is critical for assessing renal perfusion, fluid balance, and identifying oliguria or acute kidney injury.

Usage

urine_output_calculator(urine_volume_ml, time_hours, weight_kg)

Arguments

urine_volume_ml	Numeric. Total volume of urine produced in milliliters.
time_hours	Numeric. Duration of collection in hours.
weight_kg	Numeric. Patient weight in kilograms.

Details

The formula is:

Output (mL/kg/hr) = \frac{Total Volume (mL)}{Time (hr) \times Weight (kg)}

Standard thresholds for oliguria: - Adults: < 0.5 mL/kg/hr - Children: < 1.0 mL/kg/hr - Infants: < 2.0 mL/kg/hr

Value

A list containing:

Urine_Output_mL_kg_hr	The normalized urine output.
Hourly_Rate_mL_hr	The average hourly urine production.
Interpretation_Adult	Classification based on the adult threshold of 0.5 mL/kg/hr.

References

Kellum JA, Lameire N, KDIGO AKI Guideline Work Group. Diagnosis, evaluation, and management of acute kidney injury: a KDIGO summary (Part 1). Crit Care. 2013;17(1):204. doi:10.1186/cc11454

Examples

# Example 1: Oliguria
# 200 mL over 6 hours, 80 kg
# Rate = 200/6 = 33.3 mL/hr. Normalized = 33.3/80 = 0.42 mL/kg/hr
urine_output_calculator(200, 6, 80)

# Example 2: Adequate Output
# 1000 mL over 12 hours, 70 kg
# Rate = 83.3 mL/hr. Normalized = 1.19 mL/kg/hr
urine_output_calculator(1000, 12, 70)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.