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Published on: November 4, 2010
Mesenteric Artery Stenosis is a Risk Factor for Anastomotic Leakage in Colorectal Surgery
Duygu Harmankaya1, Koen J Vree Egberts2, Flores M Metz2
1Department of Gastroenterology and Hepatology, Erasmus MC University Medical Centre, Rotterdam, the Netherlands; Department of Radiology, Erasmus MC, Rotterdam, the Netherlands; Department of Gastroenterology and Hepatology, Franciscus Gasthuis and Vlietland, Rotterdam, the Netherlands.
Objective:
Anastomotic leakage (AL) after colorectal surgery leads to substantial morbidity and mortality rates. Theoretically, compromised blood flow caused by mesenteric artery (MA) stenosis may create suboptimal healing conditions at the anastomotic site, increasing susceptibility to AL. The association between MA stenosis on pre-operative computed tomography (CT) scan and AL in patients undergoing colorectal surgery was investigated.
Methods:
A multicentre, retrospective, frequency matched, nested 1:5 case control study was conducted in the Netherlands. For each patient with AL, five controls without AL were recruited from the same database matched for age and body mass index. Pre-operative CT scans were assessed blindly to identify MA stenosis ≥ 50% as the primary outcome and atherosclerotic burden and vascular pathology as secondary outcomes.
Results:
One hundred and thirty patients with AL and 627 matched controls without AL were included. The prevalence of stenosis ≥ 50% in the superior mesenteric artery (SMA) was higher in patients with AL compared with controls (13.8% vs. 2.2%; p < .001). A stenosis ≥ 50% in the inferior mesenteric artery (IMA) was also more common in patients with AL (24.6% vs. 12.1%; p < .001). Multivariable regression analysis showed a 5.9 times higher risk (95% confidence interval [CI] 2.78 - 12.60; p < .001) of AL in patients with SMA stenosis and 2.1 times higher risk for patients with IMA stenosis (95% CI 1.11 - 3.63; p = .007). Stenosis ≥ 50% of the coeliac artery was not associated with AL.
Conclusion:
The presence of SMA or IMA stenosis ≥ 50% on pre-operative CT scans is associated with a six and two times higher odds of AL, respectively, when corrected for known risk factors for AL. Whether preventive stent placement reduces the risk of AL still needs to be investigated.
Insights
Mesenteric artery stenosis, particularly in the superior mesenteric artery (SMA) and inferior mesenteric artery (IMA), significantly increases the risk of anastomotic leakage after colorectal surgery. Pre-operative CT scans can identify this risk, guiding potential interventions.
Area of Science:
- Vascular surgery
- Gastrointestinal surgery
- Radiology
Background:
- Anastomotic leakage (AL) is a severe complication of colorectal surgery.
- Compromised blood flow from mesenteric artery (MA) stenosis may impair anastomotic healing.
- Pre-operative identification of MA stenosis could predict AL risk.
Purpose of the Study:
- To investigate the association between pre-operative mesenteric artery stenosis and anastomotic leakage (AL) after colorectal surgery.
- To determine if stenosis in specific mesenteric arteries (SMA, IMA) correlates with AL.
- To assess the diagnostic value of computed tomography (CT) scans in identifying MA stenosis relevant to AL.
Main Methods:
- A multicentre, retrospective, case-control study involving 130 patients with AL and 627 matched controls.
- Pre-operative CT scans were analyzed for the presence of mesenteric artery stenosis (≥50%).
- Cases and controls were matched for age and body mass index; analyses were adjusted for known AL risk factors.
Main Results:
- Prevalence of SMA stenosis (≥50%) was significantly higher in patients with AL (13.8%) versus controls (2.2%).
- Prevalence of IMA stenosis (≥50%) was also higher in patients with AL (24.6%) versus controls (12.1%).
- SMA stenosis increased AL risk 5.9-fold, and IMA stenosis increased AL risk 2.1-fold, independent of other risk factors.
Conclusions:
- Pre-operative SMA or IMA stenosis (≥50%) detected on CT scans is a significant risk factor for AL after colorectal surgery.
- The findings suggest that identifying mesenteric artery stenosis pre-operatively is crucial for risk stratification.
- Further research is needed to evaluate the efficacy of preventive interventions like stent placement for mesenteric artery stenosis to reduce AL.
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