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Embolization flow

Muhammad Farhan Khaliq, Maria Shoaib, Syed Maaz Tariq, Muhammad Taimoor Khan
Cerebral air embolism (CAE) is a rare, avoidable and potentially fatal iatrogenic complication. Here, we report a case of CAE associated with a central venous catheter in the internal jugular vein that resulted in neurological deficits and generalised epileptic seizures. A 64-year-old man admitted for fasciotomy for compartment syndrome developed CAE with left-sided neurological deficits. The suspected origin was retrograde air flow from the right internal jugular venous catheter. The air spontaneously resorbed without the need for specific therapy, and he made a good recovery...
August 16, 2018: BMJ Case Reports
Jie Liu, Yiqing Chai, Yang Yu, Liping Liu
The aim of this study is to evaluate the efficacy of 3-dimensional (3D) ultrasonography and 3D color power Doppler ultrasound in the management of cesarean scar pregnancy (CSP).A case-control study enrolled 190 CSP patients who underwent uterine artery embolization (UAE) in combination with dilatation and curettage (D&C). The maximum diameter of gestational sac or CSP mass, uterine scar thickness, and resistance index (RI) were measured by 2D ultrasound. The lesion volume, vascular index (VI), flow index (FI), blood vessels, and blood flow index (VFI) were assessed by 3D ultrasound...
August 2018: Medicine (Baltimore)
Michael J Mills, John Nguyen, Susan Jarosz, Mehran Salari, Patrick Hurley
Arteriovenous shunting associated with angiomyolipoma is an unusual entity, which carries important implications to embolization approach. We present a distinctive case involving a 41-year-old woman who presented with retroperitoneal hemorrhage relating to renal angiomyolipoma. During angiography for urgent embolization, a complex vascular supply with arteriovenous shunting was encountered. Superselective embolization using alcohol or small particles is the standard approach to definitive treatment of symptomatic angiomyolipoma; however; their use is precluded in the setting of arteriovenous shunt hemodynamics...
October 2018: Radiology Case Reports
Bassel Mohammad Nijres, Anas S Taqatqa, Lamya Mubayed, Gregory J Jutzy, Ra-Id Abdulla, Karim A Diab, Hoang H Nguyen, Brieann A Muller, Cyndi R Sosnowski, Joshua J Murphy, Joseph Vettukattil, Vishal R Kaley, Darcy N Marckini, Bennett P Samuel, Khaled Abdelhady, Sawsan Awad
Embolization of systemic to pulmonary artery collaterals to regulate pulmonary arterial flow or pressure of the cavopulmonary circulation in patients with single ventricle is a common practice. The relative incidence and impact of this practice on future interventions like coronary artery bypass grafting is poorly understood. This study aims to evaluate the frequency and implications of internal mammary artery (IMA) embolization in the single ventricle (SV) population. A retrospective chart review was performed of SV patients who underwent cardiac catheterization before and after Fontan procedure between February 2007 and 2017...
August 13, 2018: Pediatric Cardiology
Yupeng Zhang, Chao Ma, Shikai Liang, Peng Yan, Fei Liang, Feng Guo, Chuhan Jiang
OBJECTIVE: To explore whether computed morphological features can be used as independent predictors of incomplete occlusion of aneurysms treated with pipeline embolization device. METHODS: From January 2016 to September 2017, 58 patients with 58 aneurysms were treated with pipeline embolization device in our center. Aneurysms were manually segmented from the DICOM file and we calculated 16 shape features voxel by voxel on the segmented aneurysm image. Along with other 13 clinical and radiographic variables, we performed univariate and multivariate analysis to explore predictors of incomplete occlusion...
August 10, 2018: World Neurosurgery
D F Vollherbst, R Otto, M Hantz, C Ulfert, H U Kauczor, M Bendszus, C M Sommer, M A Möhlenbruch
BACKGROUND AND PURPOSE: The type and composition of an embolic agent have a relevant influence on the performance of endovascular embolization. The aim of this study was to investigate a new version of the liquid embolic agent precipitating hydrophobic injectable liquid (PHIL) with extra-low-viscosity in an in vivo embolization model. MATERIALS AND METHODS: Twenty-four embolization procedures were performed in the porcine rete mirabile. Eight embolizations were performed with PHIL 25% low viscosity, Squid 12, and standard PHIL 25%, respectively...
August 9, 2018: AJNR. American Journal of Neuroradiology
Davide Colombi, Flavio Cesare Bodini, Margherita Bossalini, Beatrice Rossi, Emanuele Michieletti
BACKGROUND: Recently, there has been a shift towards elective endovascular repair of visceral artery aneurysms (VAAs). Transcatheter embolization (TE) and covered stenting (CS) represent the two most used endovascular techniques; however, TE carries the potential risk of end-organ ischemia while CS is challenging when the parent arteries are tortuous. Flow diverter devices (FDDs) developed for cerebral aneurysms maintain distal flow and are characterized by high navigability in tortuous arteries...
August 6, 2018: Annals of Vascular Surgery
Ali Zakaria, Bayan Al Share, Georgy Kaspar, Delano Small
Acute coronary syndrome (ACS) is a term used to describe a spectrum of diseases associated with sudden reduced blood flow to the heart. Coronary artery thromboembolism is recognized as an important nonatherosclerotic cause of acute myocardial infarctions in 2.9% of ACS cases, with a long-term outcome indicating that coronary embolism patients represent a high-risk subpopulation. There are various risk factors for developing a coronary thromboembolism, with atrial fibrillation being the most frequently reported cause...
March 2018: Journal of Family Medicine and Primary Care
Rosana López, Markus Nolf, Remko A Duursma, Eric Badel, Richard J Flavel, Hervé Cochard, Brendan Choat
Centrifuge-based techniques to assess xylem vulnerability to embolism are increasingly being used, although we are yet to reach a consensus on the nature and extent of artefactual embolism observed in some angiosperm species. In particular, there is disagreement over whether these artefacts influence both the spin (Cavitron) and static versions of the centrifuge technique equally. We tested two methods for inducing embolism: bench dehydration and centrifugation. We used three methods to measure the resulting loss of conductivity: gravimetric flow measured in bench-dehydrated and centrifuged samples (static centrifuge), in situ flow measured under tension during spinning in the centrifuge (Cavitron) and direct imaging using X-ray computed microtomography (microCT) observations in stems of two species of Hakea that differ in vessel length...
August 1, 2018: Tree Physiology
Ankit Gupta, Shyam Gupta, Akhil Kumar, Sameek Bhattacharaya, Manoj Jha, Vinay Tiwari
Vascular anomalies are categorized into vascular tumours or vascular malformations on the basis of clinical features and histopathology. The literature regarding high flow arteriovenous malformations of the auricle is rare. A case of a patient clinically diagnosed with an arteriovenous malformation of the external ear and was managed with preoperative embolization, surgical excision and reconstruction of ear with split thickness skin graft, is presented. The pathogenesis, clinical presentation, diagnostic work up, radiological intervention and management options regarding arteriovenous malformations are discussed...
May 2018: World Journal of Plastic Surgery
Lukas Goertz, Franziska Dorn, Bastian Kraus, Jan Borggrefe, Marc Schlamann, Robert Forbrig, Bernd Turowski, Christoph Kabbasch
BACKGROUND: The Derivo Embolization Device (DED) is a novel flow diverter with advanced X-ray visibility, potentially lower thrombogenicity, and an improved delivery system. OBJECTIVE: To evaluate the safety and efficacy of the DED for emergency treatment of ruptured intracranial aneurysms. METHODS: Between February 2016 and March 2018, 10 patients (median age 54.5 years, seven women) with 11 aneurysms were treated with the DED at three neurovascular centers...
August 6, 2018: Journal of Neurointerventional Surgery
Anna Luisa Kühn, Peter Kan, Visish Srinivasan, David E Rex, Katyucia de Macedo Rodrigues, Mary C Howk, Ajay K Wakhloo, Ajit S Puri
Background To evaluate the feasibility and efficacy of the pipeline embolization device in the treatment of unruptured intracranial mirror segment aneurysms. Methods Out of a total of 338 subjects, 14 were identified harboring a total of 32 internal carotid artery mirror segment aneurysms that were treated with the pipeline embolization device and were consecutively enrolled into our study. We collected data on patient demographics, modified Rankin scale (mRS) at admission, aneurysm characteristics, clinical outcome at discharge, 3-9 and at 12-18 months as well as angiography results at follow-up...
August 6, 2018: Interventional Neuroradiology
Hassam Ali, Shiza Sarfraz, Muhammad Sanan
Tetralogy of Fallot (TOF) is a congenital birth defect of the heart which actually comprises four individual flaws. It causes poor flow of oxygenated blood to the organs and leads to cyanosis (blue-tinted skin, because of inadequate oxygenation). It can be recognized at birth or in adulthood. But sometimes, cases may go unnoticed, and the patient might present with some rare complications. In this case, the patient presented with an embolic infarct of the brain at the age of 25 with an undiagnosed tetralogy of Fallot...
May 31, 2018: Curēus
Christoph J Griessenauer, Oded Goren, Shamsher S Dalal, Clemens M Schirmer
BACKGROUND: Thromboembolic complications remain a major reason for morbidity and mortality after flow diversion along with hemorrhagic complications not limited to the brain predicated on the prolonged need for dual antiplatelet therapy. Surface modification to decrease thrombogenicity and accelerate aneurysm occlusion is a promising alteration to mitigate those risks. The Pipeline embolization device (PED) with Shield technology possesses such characteristics, but is currently not approved in the United States...
July 31, 2018: World Neurosurgery
Tao Qi, Lei Ye, Zheng Chen, Zhan-Sen Huang, Bo Wang, Hao Li, Bin Zhang, Jun Chen
This study is aimed to evaluate the effectiveness and safety of the treatment of highflow priapism with superselective transcatheter embolization. From Sep. 1999 to Jan. 2013, six patients with high-flow priapism underwent superselective transcatheter embolization of the cavernous artery. Recurrence of priapism, and change in erectile function detected by nocturnal penile tumescence and rigidity (NPTR) test and the International Index of Erectile Function 5-item questionnaire (IIEF-5) were evaluated during a mean follow-up of 12 months...
February 2018: Current medical science
Nazanin Maani, Steven W Hetts, Vitaliy L Rayz
Two-scale CFD modeling is used to design and optimize a novel endovascular filtration device for removing toxins from flowing blood. The Chemofilter is temporarily deployed in the venous side of a tumor during the intra-arterial chemotherapy in order to filter excessive chemotherapy drugs such as Doxorubicin from the blood stream. The device chemically binds selective drugs to its surface thus filtering them from blood, after they have had the effect on the tumor and before they reach the heart and other organs...
July 31, 2018: Biomechanics and Modeling in Mechanobiology
Zühre Uz, Can Ince, Fadi Rassam, Bülent Ergin, Krijn P van Lienden, Thomas M van Gulik
BACKGROUND: The microvascular effects occurring after unilateral preoperative portal vein embolization (PVE) are poorly understood. The aim of this study was to assess the microvascular changes in the embolized and the non-embolized lobes after right PVE. METHODS: Videos of the hepatic microcirculation in patients undergoing right hemihepatectomy following PVE were recorded using a handheld vital microscope (Cytocam) based on incident dark field imaging. Hepatic microcirculation was measured in the embolized and the non-embolized lobes at laparotomy, 3-6 weeks after PVE...
July 26, 2018: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
Matthieu Bayle, Isabelle Clerc-Urmès, Ahmet Ayav, Jean-Pierre Bronowicki, Isabelle Petit, Xavier Orry, Valérie Laurent
PURPOSE: The aim of this study was to assess hepatocellular carcinoma (HCC) response with CT perfusion parameters before and after two transarterial chemo embolization (TACE) courses compared with MRI, and to search for predictive factors of response. METHODS: 37 lesions (19 patients) were included between October 2015 and September 2017, based on the Barcelona Clinic Liver Cancer guidelines. CT perfusion with 160-mm coverage and MRI were performed before and after the first TACE course, and after the second TACE course...
July 27, 2018: Abdominal Radiology
Rohan Poulter, David A Wood, Andrew Starovoytov, Stephanie Smith, Mehran Chitsaz, John Mayo
BACKGROUND: The aim of this study was to develop and describe percutaneous coronary angiographic techniques to create a porcine model of acute coronary stenosis with methacrylate plugs that can by assessed using fractional flow reserve (FFR), invasive coronary angiography and coronary computed tomographic (CT) perfusion imaging without introducing artefacts associated with surgical models. METHODS: Following animal care and institutional approval and using percutaneous coronary catheterisation techniques within an animal laboratory we introduced precision drilled methacrylate plugs into one of the three main coronary arteries of 10 experimental female pigs...
July 11, 2018: Heart, Lung & Circulation
Keisuke Sasaki, Masahiro Yoshida, Masaki Mino, Ryosuke Tashiro
Although direct puncture of the cervical vertebral artery(VA)is not commonly performed in neuroendovascular therapy, it is sometimes inevitable for procedural or technical reasons. We report a case of a ruptured VA aneurysm that required direct cervical VA puncture for treatment. A 79-year-old man was transferred to our hospital with the diagnosis of subarachnoid hemorrhage. Cerebral angiography revealed a right VA-posterior inferior cerebellar artery aneurysm. The aneurysm showed downward projection due to retrograde flow of the right VA caused by chronic occlusion of the right subclavian artery...
July 2018: No Shinkei Geka. Neurological Surgery
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