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Readmission Following Extracranial-Intracranial Bypass Surgery: Risk Factors and Patient Characteristics Using the

Simon G Ammanuel¹, Ahmed M Elbayomy¹, Jacob Bethel¹

¹Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, USA.

Neurosurgery Practice

|April 15, 2026

Summary

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This summary is machine-generated.

High body mass index (BMI) is a significant risk factor for 30-day readmission following extracranial-intracranial (EC-IC) bypass surgery. Optimizing patient BMI before surgery may reduce readmission rates.

Area of Science:

Neurosurgery
Vascular Surgery
Health Services Research

Background:

Extracranial-intracranial (EC-IC) bypass surgery is a critical procedure for intracranial revascularization.
Identifying risk factors for readmission is crucial for improving patient outcomes and reducing healthcare costs.

Purpose of the Study:

To identify risk factors associated with 30-day readmission after EC-IC bypass surgery.
To analyze data from the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database.

Main Methods:

Longitudinal analysis of ACS-NSQIP data from 2011-2020.
Inclusion of patients who underwent EC-IC bypass (CPT code 61711).
Univariate and multivariate logistic regression to identify predictors of 30-day readmission.

Keywords:

American College of Surgeons National Surgical Quality Improvement Program Cerebral bypass Extracranial-intracranial bypass Readmissions

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Minimally Invasive Thumb-sized Pterional Craniotomy for Surgical Clip Ligation of Unruptured Anterior Circulation Aneurysms

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Published on: August 11, 2015

Main Results:

9.1% of 350 patients were readmitted within 30 days.
Higher BMI, diabetes, dialysis, and Black race were associated with readmission in univariate analysis.
Elevated BMI was identified as an independent predictor of readmission (OR 1.07, P = .015).

Conclusions:

Body mass index (BMI) is a significant predictor of 30-day readmission post-EC-IC bypass.
Preoperative optimization of BMI and targeted postoperative care are essential for high-risk patients.
Further prospective studies are needed to validate findings and explore additional readmission factors.