Independent risk factors for prolonged postoperative ileus development
Related Experiment Video
Updated: Mar 23, 2026

Postoperative Ileus Murine Model
Published on: July 12, 2024
Matt M Murphy1, Sarah E Tevis2, Gregory D Kennedy2
1University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
Insights
Identifying risk factors for postoperative ileus (POI) is crucial. This study found five modifiable factors—smoking, weight loss, preoperative antibiotics, bowel prep, and surgical approach—that can help prevent POI and improve patient outcomes.
Area of Science:
- Gastroenterology
- Surgical Outcomes
- Health Services Research
Background:
- Postoperative ileus (POI) affects 15% of colectomy patients, costing over $1.3 billion annually.
- While some causes are known, patient-specific risk factors for POI remain unclear.
- Understanding these risks is vital for improving patient well-being and reducing healthcare costs.
Purpose of the Study:
- To identify independent risk factors influencing the development of postoperative ileus (POI).
- To provide insights into potential targets for preoperative modification to mitigate POI.
Main Methods:
- Analysis of 9734 patients undergoing elective colectomy from 2011-2012 using the American College of Surgeons National Surgical Quality Improvement Program database.
- Multivariate analyses were employed to evaluate demographics, comorbidities, preoperative treatments, and operative characteristics as risk factors.
- Descriptive statistics were calculated to summarize patient data and outcomes.
Main Results:
- A total of 1364 patients (14%) developed POI.
- Patients with POI had higher rates of postoperative complications, readmissions, and reoperations.
- Thirteen independent risk factors for POI were identified.
Conclusions:
- Five modifiable risk factors for POI were identified: smoking, weight loss, preoperative oral antibiotics, mechanical bowel preparation, and surgical approach.
- These modifiable factors offer targets for preoperative intervention to potentially reduce POI incidence.
- Addressing these factors may improve patient quality of life and decrease postoperative complications, readmissions, and reoperations.
Background:
Postoperative ileus (POI) has a significant impact on patient wellbeing, and with a 15% incidence in colectomy patients costs US hospitals >$1.3 billion per year. Although some causative mechanisms have been identified, little is known about what places patients at risk for ileus. We aimed to identify factors that independently influence the development of POI.
Materials And Methods:
Patients who underwent elective surgery between 2011 and 2012 were identified from the colectomy-specific American College of Surgeons National Surgical Quality Improvement Program database. Descriptive statistics were calculated, and demographics, comorbidities, preoperative treatments, and operative characteristics were evaluated as risk factors using multivariate analyses.
Results:
A total of 9734 patients were included in this analysis; 1364 (14%) were found to have POI. Patients who developed an ileus were more likely to develop any postoperative complication, to be readmitted, and require reoperation compared with patients without POI. In addition, we identified 13 independent risk factors for POI.
Conclusions:
Five modifiable risk factors for development of POI were identified as follows: smoking, weight loss, preoperative oral antibiotics, mechanical bowel preparation, and surgical approach. These identifications provide insight into possible targets for preoperative modification, which may lead to improvements in patients' quality of life and influence outcomes such as postoperative complications, readmission, and reoperation.
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