Risk score for one-year mortality following emergent infra-inguinal bypass

Area of Science:

• Vascular Surgery
• Outcomes Research
• Health Services Research

Background:

• Emergent infra-inguinal bypass is a critical procedure for limb salvage.
• Identifying factors influencing patient mortality is crucial for optimizing care.
• Existing risk stratification models may not fully capture outcomes for this specific patient population.

Purpose of the Study:

• To identify key variables associated with mortality after emergent infra-inguinal bypass.
• To develop a predictive risk score for 1-year mortality following this procedure.
• To inform tailored postoperative and long-term management strategies for high-risk patients.

Main Methods:

• Analysis of 2126 patients undergoing emergent infra-inguinal artery bypass from the Vascular Quality Initiative.
• Univariable analysis (chi-squared, t-tests) followed by multivariable logistic regression.
• Development of a risk score based on significant multivariable predictors (P <= .05).

Main Results:

• Increasing age, low BMI, coronary artery disease, anemia, and perioperative complications were associated with mortality.
• Prosthetic conduit use and need for revision/thrombectomy increased mortality risk.
• Discharge medications (statins, antiplatelets, anticoagulants) were the primary modifiable factors impacting survival.

Conclusions:

• Discharge medications are the most significant modifiable factor influencing survival post-emergent infra-inguinal bypass.
• Patients should receive statins, antiplatelets, and anticoagulants at discharge unless contraindicated.
• A validated risk score accurately predicts 1-year mortality, enhancing patient management strategies.