cliot (version 1.0.0)

akin_aki_staging: AKIN Classification for Acute Kidney Injury (AKI)

Description

Classifies the severity of Acute Kidney Injury (AKI) based on the Acute Kidney Injury Network (AKIN) criteria. The staging is determined by the worst of two criteria: serum creatinine changes (relative to baseline) or urine output duration.

Usage

akin_aki_staging(baseline_creatinine, max_creatinine,
                 urine_output_stage = 0, rrt_initiated = 0)

Value

A list containing:

AKIN_Stage

The final classification (No AKI, Stage 1, Stage 2, or Stage 3).

Numeric_Stage

Integer representation of the stage (0-3).

Criteria_Met

Breakdown of stages derived from Creatinine vs. Urine Output components.

Arguments

baseline_creatinine

Numeric. Baseline serum creatinine in mg/dL.

max_creatinine

Numeric. Maximum serum creatinine reached within 48 hours.

urine_output_stage

Numeric (0, 1, 2, or 3). The stage corresponding to the patient's urine output criteria. 0: Normal (> 0.5 ml/kg/hr). 1: < 0.5 ml/kg/hr for > 6 hours. 2: < 0.5 ml/kg/hr for > 12 hours. 3: < 0.3 ml/kg/hr for 24 hours OR Anuria for 12 hours.

rrt_initiated

Numeric (0 or 1). Was Renal Replacement Therapy (RRT) initiated? (1 = Yes, automatically Stage 3).

References

Mehta RL, Kellum JA, Shah SV, et al. Acute Kidney Injury Network: report of an initiative to improve outcomes in acute kidney injury. Crit Care. 2007;11(2):R31. doi:10.1186/cc5713

Examples

# Example 1: Stage 1 (Creatinine rise >= 0.3 mg/dL)
# Base 1.0, Max 1.3, Normal UO
akin_aki_staging(1.0, 1.3, 0, 0)

# Example 2: Stage 3 (Urine Output criteria)
# Base 1.0, Max 1.2 (No AKI by Cr), UO < 0.3 for 24h (Stage 3)
akin_aki_staging(1.0, 1.2, 3, 0)