Automatic Segmentation, Detection, and Diagnosis of Abdominal Aortic Aneurysm (AAA) Using Convolutional Neural Networks and Hough Circles Algorithm
ConclusionsAs a whole, a classifier using Convolutional Neural Network is designed and applied in order to detect AAA region among other abdominal regions. Then Hough Circles algorithm is applied to aorta patches for finding aorta border and measuring its diameter. Ultimately, the detected aortas will be categorized according to their diameters. All steps meet the expected results.
Aortocaval fistula (ACF) is a rare but serious complication of ruptured abdominal aortic aneurysm (AAA). We discuss a 72-year-old man who presented with abdominal pain, acute renal failure, and bilateral leg phlegmasia. Computed tomography (CT) angiography confirmed an 8.5-cm AAA with ACF (Fig 1).
Abstract OBJECTIVES: With a focus on renal function, the goal of this multicentre study was to assess peri-operative complications and late mortality of open surgical repair (OSR) of juxtarenal abdominal aortic aneurysms (JRAAA). METHODS: From February 2005 to December 2015, 315 consecutive patients undergoing elective OSR of a JRAAA in five French academic centres were evaluated retrospectively. The definition of JRAAA was an aortic aneurysm extending up to but not involving the renal arteries, i.e., a short neck
ConclusionDifferentiating aneurysms as false (pseudo) or true is important to help determine the underlying aetiology. Common causes of pseudoaneurysms include arterial, blunt or penetrating trauma. True aneurysms commonly develop from inflammatory atherosclerosis, however mycotic infection, inflammatory arteritis, and entrapment syndrome should be excluded. There may be some evidence to suggest a genetic predisposition to popliteal artery aneurysms. Anecdotal evidence suggests a weak association between chemotherapy and aneurysm progression, warranting further investigation into a causative link.
A 73-year-old woman with a history of a 6-cm juxtarenal abdominal aortic aneurysm who underwent a fenestrated endovascular aortic repair using the Zenith fenestrated endovascular (ZFEN) device (Cook Medical, Bloomington, Ind) presented with a type IA endoleak found on routine surveillance computed tomography angiography (CTA). The previously placed ZFEN device included a scallop for the superior mesenteric artery (SMA) and bilateral stented fenestrations to the renal arteries.
CONCLUSION: The present data underline that ELIB is a non-negligible occurrence during long term EVAR follow up and requires further interventions, most often by endovascular solutions. According to the ELIB risk factors identified in this study, an iliac leg diameter oversize>10% and extensive common iliac artery coverage (
Abstract Background and objectives: Abdominal aortic aneurysm (AAA) growth is unpredictable after the endovascular aneurysm repair (EVAR). Continuing aortic wall degradation and weakening due to hypoxia may have a role in post-EVAR aneurysm sac growth. We aimed to assess the association of aortic wall density on computed tomography angiography (CTA) with aneurysm growth following EVAR. Materials and Methods: A total of 78 patients were included in the study. The control group consisted of 39 randomly assigned patients without aortic pathology. Post-EVAR aneurysm sac volumes on CTA were measured twice during the fo...
ConclusionThis case highlights the potential complications of using UFH anticoagulation following reversal of factor Xa inhibitors with andexanet alfa and underscores the importance of peri ‐procedural anticoagulation planning. For patients who require intra‐operative anticoagulation, providers should consider anticoagulation reversal with prothrombin complex concentrate instead of andexanet alfa or administration of a parenteral direct thrombin inhibitor, such as argatroban or bi valirudin during the surgical procedure.This article is protected by copyright. All rights reserved.
ConclusionsThis study identified the sources of fusion error after insertion of rigid material during EVAR. As the sharpest angulation between aneurysm neck and sac increases, the overall accuracy of the fusion might be affected.
CONCLUSIONS: Older patients, those with female gender, and those with larger left iliac sealing diameters seem to experience higher rates of late srEL. Independent confirmation of these must be addressed in larger studies. PMID: 31160189 [PubMed - as supplied by publisher]
ConclusionsRRED was smaller than the actual diameter in more than half of pre-rupture AAAs, suggesting a lower rupture risk than estimated with the actual diameter. The results suggest that the currently available biomechanical imaging markers might not be ready for use in clinical practice.