Advanced AKI Risk Calculator

AKI risk input form

Patient Name

Age (years)

Sex

Weight (kg)

Baseline Creatinine (mg/dL)

Current Creatinine (mg/dL)

Urine Output (mL)

Collection Interval (hours)

Summary

Enter comorbidities, exposures, and kidney trend values. The result appears above this form after submission.

Chronic kidney disease

Diabetes mellitus

Heart failure

Liver disease

Prior acute kidney injury

Hypertension

Anemia or low hemoglobin

Sepsis or severe infection

Dehydration or volume depletion

Hypotension or shock

Critical illness or ICU setting

Major surgery or emergency procedure

Recent iodinated contrast exposure

Nephrotoxic medications or toxins

Dialysis or renal replacement therapy

Reset

Formula used

This calculator uses an educational weighted model: Raw Score = susceptibility points + exposure points + kidney stress points. Susceptibility points come from age, baseline renal reserve, and chronic conditions. Exposure points come from sepsis, dehydration, hypotension, surgery, contrast, ICU status, and nephrotoxins.

The displayed percentage applies a logistic conversion: Risk % = 100 ÷ (1 + e^-z), where z = -3.45 + 0.055 × score + trend adjustments. Trend adjustments increase risk when creatinine rises or urine output falls.

The stage flag is checked separately from the risk score. It uses entered serum creatinine and urine output against threshold-based AKI staging rules. This helps distinguish general vulnerability from possible current kidney injury.

This implementation is intentionally transparent and editable. It is a teaching-oriented template, not a validated bedside prediction instrument.

How to use this calculator

Enter age, weight, baseline creatinine, current creatinine, urine volume, and collection interval.
Mark any chronic kidney risk factors and current exposure risks that apply.
Press Calculate AKI Risk to show the result block above the form.
Review the percentage, category, stage flag, creatinine trend, urine rate, and interpretation.
Use the Plotly graph to see which factors contributed most.
Export the report with the CSV or PDF buttons when needed.

Example data table

Example	Age	Baseline Cr	Current Cr	Urine Output	Score	Risk	Stage	Category
Example A	32	0.8 mg/dL	0.9 mg/dL	420 mL / 6 h	0	3.1%	No stage flag from entered thresholds	Low
Example B	67	1.4 mg/dL	1.8 mg/dL	220 mL / 8 h	86	91.5%	KDIGO Stage 1	Very High
Example C	74	1.1 mg/dL	2.5 mg/dL	180 mL / 12 h	124	99%	KDIGO Stage 2	Very High

FAQs

1. What does this calculator estimate?

It estimates short-term AKI vulnerability from entered comorbidities, exposures, creatinine change, and urine output. It also flags possible stage thresholds separately.

2. Is this a validated clinical prediction model?

No. It is a transparent educational template that organizes common AKI risk elements into a weighted score. Use it for learning, triage support, or prototype workflows.

3. Why are risk percentage and stage flag both shown?

Risk percentage reflects overall vulnerability. The stage flag checks whether the entered creatinine and urine output already match threshold criteria for possible current AKI.

4. Can I change the factor weights?

Yes. The scoring logic is contained in the calculation function near the top of the file. You can tune point values, thresholds, labels, and interpretation text.

5. Why is urine output normalized by body weight and time?

Urine output thresholds are commonly interpreted in mL per kilogram per hour. That format makes low output easier to compare across patient sizes.

6. What units does the calculator expect?

Creatinine is entered in mg/dL, weight in kilograms, urine volume in milliliters, and collection duration in hours. Keep units consistent for accurate output.

7. When should the PDF or CSV export be used?

Use exports for case review, audits, demonstrations, or prototype documentation. They are handy for saving the summary, contribution weights, and stage reasons.

8. Can this page be integrated into a larger site?

Yes. It is a single-file template with separated calculation logic, reusable styling, and straightforward front-end export functions, so integration is usually simple.