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Introduction: Most patients with ischemic colitis have a favourable evolution; nevertheless, the location in the right colon has been associated with a worse prognosis. The purpose of this study is to compare the clinical presentation and results of right colon ischemic colitis (CICD) with ischemic colitis of other colonic segments (non-CIDC)., Methods: Retrospective, observational study of patients admitted to our hospital with ischemic colitis between 1993 and 2014, identified through a computerized search of the ICD9 codes. They were divided into 2groups: CICD and non-CICD. Comorbidities, clinical presentation, need for surgery, and mortality were compared. Multivariate analysis was performed using logistic regression adjusting for age and sex. Statistical significance was established at a value of P <0.05., Results: A total of 204 patients were identified, 61 (30%) with CICD; 61% of CICD patients required surgery compared to 22% of non-CICD patients (P <0.001). Post-surgical mortality (32 vs. 55%) and overall mortality (20 vs. 15%) differences were not statistically significant. CICD patients had more commonly unfavourable outcomes than non-CICD patients (61 vs. 25%, P <0.001). The odds ratio (OR) for surgery was 5.28 and 4.47 for unfavourable outcomes for patients with CICD., Conclusions: CICD patients have a worse prognosis than non-CICD patients, 5 times more likely to need surgery and 4 times more likely to have unfavourable outcomes., (Copyright © 2020 AEC. Publicado por Elsevier España, S.L.U. All rights reserved.)

Introduction: Our aim is to identify the location and size of the anterior foramina of sacral vertebral bodies and analyse the haemodynamic variables that could influence the haemorrhagic severity of the injury of the presacral venous plexus., Materials and Methods: Using computed axial tomography the morphological data of 70 sacral bones in 67 patients with rectal cancer were recorded, as well as measuring the height between the vena cava and S5. After transfemoral catheterisation the inferior vena cava pressure was recorded in 10 patients with rectal cancer. Hydrodynamic principles, according to Bernoulli's Law, were applied to calculate sacral venous plexus pressure, and the flow rate according to the calibre of a hypothetical venous injury., Results: The maximum diameter ranged from 0.5mm to 4mm in 22% of the cases. All foramina of 2 or more millimetres were located in the S4-S5 region. Sacral plexus venous pressure in lithotomy was almost double the inferior vena cava pressure in normal position. Blood flow ranged from 498 to 1,994 ml/min for injuries of sizes between 2 and 4mm, respectively., Conclusions: Larger calibre foramina are found in vertebral bodies of S4-S5. Venous injury at these levels can reach a flow rate of 2 l/min., (Copyright © 2011 AEC. Published by Elsevier Espana. All rights reserved.)