Julius Pochhammer1, Fridolin Tröster2, Gunnar Blumenstock3, Julienne Closset1, Stefanie Lang1, Marie-Pascale Weller1, Michael Schäffer4. 1. Department of Visceral, General and Thoracic Surgery, Marienhospital Stuttgart, Böheimstr. 37, 70199, Stuttgart, Germany. 2. Department of Diagnostic and Interventional Radiology, Marienhospital Stuttgart, Stuttgart, Germany. 3. Department of Clinical Epidemiology and Applied Biometry, Eberhard Karls Universität Tübingen, Tübingen, Germany. 4. Department of Visceral, General and Thoracic Surgery, Marienhospital Stuttgart, Böheimstr. 37, 70199, Stuttgart, Germany. michael.schaeffer@vinzenz.de.
Abstract
PURPOSE: Anastomotic leakage (AL) is associated with increased morbidity and mortality after colorectal surgery. Calcification of the arteries has been identified as a risk factor for cardiovascular events and can be reliably measured on computed tomography using software assistance. The aim of this prospective study was to prove the value of calcium scoring of the iliac arteries as a predictor of AL after rectal anastomosis. METHODS: Consecutive patients who underwent colorectal resection with rectal anastomosis were analyzed. Diagnostic computed tomography images were used to detect calcification of the arteries supplying the rectal anastomosis. Logistic regression analysis was used to determine the relationship between vascular calcification and AL. RESULTS: Of 139 included and analyzed patients, AL occurred in 15 (11%). The volume and calcium scores were significantly higher in the infrarenal aorta, the left and right common iliac artery, and the left internal iliac artery. In univariate analysis, calcification of the left internal iliac artery and both internal iliac arteries combined correlated with the occurrence of the primary endpoint. A receiver operating curve analysis led to the cut-off values of 30 and 6 for the volume score and calcium score, respectively. They provide a negative predictive value of 0.97 and a positive predictive value of 0.19. CONCLUSIONS: Calcification in the iliac arteries appears to be a good marker for the risk of leakage after rectal anastomosis. The calcification scoring system is easy to calculate after computed tomography and may aid in patient selection to create a protective ileostomy.
PURPOSE: Anastomotic leakage (AL) is associated with increased morbidity and mortality after colorectal surgery. Calcification of the arteries has been identified as a risk factor for cardiovascular events and can be reliably measured on computed tomography using software assistance. The aim of this prospective study was to prove the value of calcium scoring of the iliac arteries as a predictor of AL after rectal anastomosis. METHODS: Consecutive patients who underwent colorectal resection with rectal anastomosis were analyzed. Diagnostic computed tomography images were used to detect calcification of the arteries supplying the rectal anastomosis. Logistic regression analysis was used to determine the relationship between vascular calcification and AL. RESULTS: Of 139 included and analyzed patients, AL occurred in 15 (11%). The volume and calcium scores were significantly higher in the infrarenal aorta, the left and right common iliac artery, and the left internal iliac artery. In univariate analysis, calcification of the left internal iliac artery and both internal iliac arteries combined correlated with the occurrence of the primary endpoint. A receiver operating curve analysis led to the cut-off values of 30 and 6 for the volume score and calcium score, respectively. They provide a negative predictive value of 0.97 and a positive predictive value of 0.19. CONCLUSIONS:Calcification in the iliac arteries appears to be a good marker for the risk of leakage after rectal anastomosis. The calcification scoring system is easy to calculate after computed tomography and may aid in patient selection to create a protective ileostomy.
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