Surgical Risk Assessment Calculator

The Surgical Risk Assessment Calculator estimates postoperative complication risk percentage based on age, BMI, ASA status, and functional status. This tool helps surgeons and healthcare providers evaluate patient safety before surgery. Whether you are conducting a preoperative assessment, planning postoperative care, or discussing informed consent, this tool provides clear, data-driven insights to support clinical decisions.

Age Enter patient's age in years

Body Mass Index (BMI) Enter patient's BMI (kg/m²)

Gender

ASA Physical Status

Functional Status

Type of Surgery

Number of Comorbidities Select the number of significant comorbidities (e.g., diabetes, hypertension, heart disease)

0 0 5+

Emergency Surgery

Current Smoker

Recent Heart Attack (within 6 months)

Quick Examples:

How Postoperative Complication Risk Is Calculated

Postoperative complication risk represents the statistical likelihood of a patient facing health issues after a procedure. This calculator uses a modified ACS NSQIP algorithm to analyze patient health and surgical complexity.

First, it assigns a risk score based on demographics, functional status, and the ASA classification.
Next, it adds points for existing comorbidities and the specific surgery type.
Finally, the tool adjusts this score based on urgent factors, such as emergency status or smoking, to predict the percentage chance of complications.

This method is widely used in clinical settings to estimate probability accurately by weighing both chronic conditions and acute surgical stressors.

What Your Postoperative Complication Risk Means

This percentage score indicates the probability of adverse events, such as surgical site infections or cardiac complications, occurring within 30 days after the operation.

Low Risk (<8%)

For healthy patients undergoing minor procedures, standard monitoring is usually sufficient. Continue focusing on maintaining current health habits.

Moderate Risk (8-15%)

Patients with existing conditions like mild diabetes or higher BMI fall here. Use this time to optimize blood sugar or nutrition before the procedure.

High Risk (>15%)

This suggests significant vulnerability. Consider consulting specialists for a high-risk care plan or discussing non-surgical alternatives.

Pro Tip

Remember that functional status is a major factor; improving mobility before surgery can lower risk.

This tool provides estimates based on statistical averages and is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider regarding specific medical conditions.

Update the calculation if the patient’s health status changes significantly before the surgery date.