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https://www.readbyqxmd.com/read/29788812/a-novel-technique-to-visualize-true-lumen-in-endovascular-treatment-of-the-occlusive-carotid-dissection-and-the-usefulness-of-external-internal-carotid-collateral-channel
#1
Keiji Murata, Shigeru Yamauchi, Yuta Kaneshiro, Yumiko Urano, Keishi Yamagata, Toshihiro Takami
Background Dissection of the internal carotid artery (ICA) can cause occlusion or severe stenosis and is known to be one of the major causes of ischemic stroke in the young. Endovascular treatment is one of the useful options for carotid dissections, but passing the guidewire through the occlusion (lesion-cross) and confirmation of the true lumen are sometimes difficult. Case presentation A 40-year-old right-handed man complaining of dysarthria and gait disturbance consulted our hospital. Magnetic resonance imaging and angiography revealed right ICA dissection...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29753899/co-adjuvant-treatment-of-vasospasm-in-ruptured-unsecured-cerebral-aneurysms-with-aggressive-angioplasty-intra-arterial-nimodipine-and-aneurysm-embolization
#2
Ching-Chang Chen, Alvin Yi-Chou Wang, Chun-Ting Chen, Po-Chuan Hsieh
BACKGROUND: Vasospasm is a major cause of morbidity and mortality in patients following aneurysmal subarachnoid hemorrhage (SAH). Although early treatment of ruptured aneurysms is advocated, delayed intervention complicates the treatment strategy and leading to significant vasospasm and a poor prognosis. We report our experience of endovascular protocol for occlusion of the unsecured aneurysm and angioplasty for vasospasm in a single session. METHODS: A total of 24 cases with significant vasospasm and unsecured ruptured cerebral aneurysm were reviewed among 660 aneurysmal SAH patients between January 2011 and May 2017...
May 10, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29706428/functional-ct-assessment-of-extravascular-contrast-distribution-volume-and-myocardial-perfusion-in-acute-myocardial-infarction
#3
Aaron So, Gerald Wisenberg, Patrick Teefy, Andrew Yadegari, Rodrigo Bagur, Jennifer Hadway, Laura Morrison, Anna MacDonald, Dave Gaskin, John Butler, Heather Biernaski, Stephanie Skanes, Stella DohYeoun Park, Ali Islam, Jiang Hsieh, Ting-Yim Lee
PURPOSE: In a pig model of acute myocardial infarction (AMI), we validated a functional computed tomography (CT) technique for concomitant assessment of myocardial edema and ischemia through extravscualar contrast distribution volume (ECDV) and myocardial perfusion (MP) measurements from a single dynamic imaging session using a single contrast bolus injection. METHODS: In seven pigs, balloon catheter was used to occlude the distal left anterior descending artery for one hour followed by reperfusion...
April 26, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29701342/endovascular-removal-of-foreign-bodies
#4
Roger Rodrigues, Alfredo Agostinho, Gabriel Anacleto, Paula Branco, Óscar Gonçalves
INTRODUCTION: Intravascular or catheter embolization of a foreign body, either by fracture or migration, is a rare condition, occurring in approximately 1%. This study is focused on the migration of catheters since they represent the majority of cases of embolization. We present one of the largest published series of removal of foreign bodies with endovascular techniques. The objective of the present study is to demonstrate the different locations where foreign bodies, in most cases catheters, can reach, the technique used to remove them and the affected population...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29700682/eus-guided-hepaticojejunostomy-using-novel-plastic-stent-combined-with-antegrade-metal-stent-placement
#5
Takeshi Ogura, Nobu Nishioka, Kazuhide Higuchi
BACKGROUND: Endoscopic ultrasound-guided hepaticojejunostomy (EUS-HJS) combined with antegrade stenting (AS) can proceed if patients are complicated with duodenal obstruction or surgical anatomy such as Roux-en-Y esophagojejunostomy. A novel plastic stent (Gadelius Medical Co. Ltd., Tokyo, Japan) that is designed to prevent stent migration into the abdominal cavity was made available in Japan. Here, we describe technical tips for EUS-HJS combined with EUS-AS using this plastic stent. TECHNICAL PRESENTATION: After the intrahepatic bile duct is punctured, the guidewire is inserted into the intestine across the bile duct obstruction site...
April 26, 2018: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/29666905/balloon-occluded-carbon-dioxide-gas-angiography-for-internal-iliac-arteriography-and-intervention
#6
Mitsuhiro Kishino, Shuichiro Nakaminato, Yoshio Kitazume, Naoyuki Miyasaka, Toshifumi Kudo, Yukihisa Saida, Ukihide Tateishi
INTRODUCTION: The usefulness of carbon dioxide (CO2 ) gas digital subtraction angiography (DSA) has been reported for patients with renal insufficiency and allergy to iodinated contrast agents. However, CO2 gas cannot replace the iodinated contrast agent in all cases owing to some disadvantages. We describe balloon-occluded CO2 DSA (B-CO2 DSA) as an improved CO2 DSA procedure for interventions in the internal iliac artery (IIA) region and compare the quality of images obtained using conventional CO2 DSA and B-CO2 DSA...
April 17, 2018: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29664760/effect-of-routine-clopidogrel-use-on-bleeding-complications-after-endobronchial-ultrasound-guided-fine-needle-aspiration
#7
Tracey N Webb, Eric Flenaugh, Ralitza Martin, Christopher Parks, Rabih I Bechara
BACKGROUND: Endobronchial ultrasonography has proven to be highly sensitive and specific in the diagnoses of patients with mediastinal and hilar adenopathy. Many of these patients are on a combination of clopidogrel (a compound that inhibits adenosine diphosphate-induced platelet aggregation) and aspirin due to neurological and/or cardiac-related comorbidities, and stopping anticoagulation may place these patients at high risk for potential complications. Our group has previously showed that thoracentesis with an 8-french catheter is safe in patients receiving clopidogrel and aspirin with low risk of complications...
April 16, 2018: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/29663052/magnetic-particle-imaging-guided-real-time-percutaneous-transluminal-angioplasty-in-a-phantom-model
#8
Stefan Herz, Patrick Vogel, Philipp Dietrich, Thomas Kampf, Martin A Rückert, Ralph Kickuth, Volker C Behr, Thorsten A Bley
PURPOSE: To investigate the potential of real-time magnetic particle imaging (MPI) to guide percutaneous transluminal angioplasty (PTA) of vascular stenoses in a phantom model. MATERIALS AND METHODS: Experiments were conducted on a custom-built MPI scanner. Vascular stenosis phantoms consisted of polyvinyl chloride tubes (inner diameter 8 mm) prepared with a centrally aligned cable tie to form ~ 50% stenoses. MPI angiography for visualization of stenoses was performed using the superparamagnetic iron oxide nanoparticle-based contrast agent Ferucarbotran (10 mmol (Fe)/l)...
April 16, 2018: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29656325/dosing-of-the-second-generation-cryoballoon-using-acute-time-to-pulmonary-vein-isolation-as-an-indicator-of-durable-ablation-in-a-canine-model
#9
Wilber Su, Nicolas Coulombe, Nicole Kirchhof, Erin Grassl, Dan Wittenberger
BACKGROUND: Rigid time-based dosing protocol(s) currently used in the clinic for cryoballoon ablation of atrial fibrillation may be inadequate to guide the circumferential and transmural cryothermal energy transfer across the pulmonary vein (PV) and may result in injury to collateral tissues or electrical gaps between the PV and left atrium (LA). OBJECTIVE: A physiologic endpoint (e.g., acute time-to-PV isolation a.k.a. time-to-effect; TTE) may be effective in the determination of a transmural lesion formation and may allow for individualized ablation dosing across each PV...
April 14, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29650784/under-pressure-comparison-of-aspiration-techniques-for-endovascular-mechanical-thrombectomy
#10
O Nikoubashman, D Wischer, H M Hennemann, M Büsen, C Brockmann, M Wiesmann
BACKGROUND AND PURPOSE: Blood flow should be interrupted during mechanical thrombectomy to prevent embolization of clot fragments. The purpose of our study was to provide a handy overview of the most common aspiration devices and to quantify their flow characteristics. MATERIALS AND METHODS: We assessed volumetric flow rates generated by a 60-mL VacLok vacuum pressure syringe, a Pump MAX aspiration pump, and a Dominant Flex suction pump connected to the following: 1) an 8F long sheath, 2) an 8F balloon-guide catheter, 3) an ACE 64 distal aspiration catheter, and 4) an AXS Catalyst 6 Distal Access Catheter...
April 12, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29628942/clinical-and-angiographic-outcomes-with-the-combined-local-aspiration-and-retriever-in-the-north-american-solitaire-stent-retriever-acute-stroke-nasa-registry
#11
Tim W Malisch, Osama O Zaidat, Alicia C Castonguay, Franklin A Marden, Rishi Gupta, Chung-Huan J Sun, Coleman O Martin, William E Holloway, Nils Mueller-Kronast, Joey English, Italo Linfante, Guilherme Dabus, Hormozd Bozorgchami, Andrew Xavier, Ansaar T Rai, Michael Froehler, Aamir Badruddin, Thanh N Nguyen, M Asif Taqi, Michael G Abraham, Vallabh Janardhan, Hashem Shaltoni, Robin Novakovic, Albert J Yoo, Alex Abou-Chebl, Peng Roc Chen, Gavin W Britz, Ritesh Kaushal, Ashish Nanda, Raul G Nogueira
Background: Various techniques are used to enhance the results of mechanical thrombectomy with stent-retrievers, including proximal arrest with balloon guide catheter (BGC), conventional large bore proximal catheter (CGC), or in combination with local aspiration through a large-bore catheter positioned at the clot interface (Aspiration-Retriever Technique for Stroke [ARTS]). We evaluated the impact of ARTS in the North American Solitaire Acute Stroke (NASA) registry. Summary: Data on the use of the aspiration technique were available for 285 anterior circulation patients, of which 29 underwent ARTS technique, 131 CGC, and 125 BGC...
February 2018: Interventional Neurology
https://www.readbyqxmd.com/read/29605246/influence-of-local-myocardial-damage-on-index-of-microcirculatory-resistance-and-fractional-flow-reserve-in-target-and-nontarget-vascular-territories-in-a-porcine-microvascular-injury-model
#12
Joo Myung Lee, Hyun Kuk Kim, Kyung Seob Lim, Jun-Kyu Park, Ki Hong Choi, Jonghanne Park, Doyeon Hwang, Tae-Min Rhee, Jeong Hoon Yang, Eun-Seok Shin, Chang-Wook Nam, Joon-Hyung Doh, Joo-Yong Hahn, Bon-Kwon Koo, Myung Ho Jeong
OBJECTIVES: The aim of this study was to investigate the influence of microvascular damage in one vessel territory on invasively measured physiological parameters in the other vessel, using a porcine microvascular damage model. BACKGROUND: Although fractional flow reserve (FFR)-guided decision-making for the nonculprit stenosis in patients with acute myocardial infarction has been reported to be better than angiography-guided revascularization, there have been debates regarding the influence of microvascular dysfunction on measured FFR in nonculprit vessels...
March 22, 2018: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29581679/balloon-inflated-catheters-for-enteral-feeding-a-word-of-caution
#13
Nihar Ranjan Dash, Anand Narayan Singh, Ragini Kilambi
Catheters with inflatable balloons such as a Foley catheter may be used for feeding gastrostomy/jejunostomy. The incorrect or improper use of these catheters can have serious consequences. We report 13 cases of feeding jejunostomy with balloon-inflated catheter's malfunction, some referred to our centre and others operated here over a period of 8 years. The most dramatic consequence of such improper use led to rupture of the small intestine due to inadvertent over-inflation (over 100 ml) of the balloon of the catheter during a contrast study...
February 2018: Indian Journal of Surgery
https://www.readbyqxmd.com/read/29578400/incidence-and-timing-of-inadvertent-nephrostomy-catheter-displacement-in-patients-with-ureteral-obstruction
#14
Naoya Niwa, Kazuhiro Matsumoto, Eiji Kikuchi, Satoshi Yazawa, Toshikazu Takeda, Shinya Morita, Takeo Kosaka, Kazunobu Shinoda, Ryuichi Mizuno, Toshiaki Shinojima, Hiroshi Asanuma, Mototsugu Oya
INTRODUCTION: To evaluate nephrostomy catheter displacement, we assessed the cumulative nephrostomy catheter displacement rate in patients with percutaneous nephrostomy and compared the nephrostomy displacement rates between pigtail and balloon catheters. MATERIALS AND METHODS: Between 2003 and 2011, 87 patients who underwent percutaneous nephrostomy catheter placement and more than one subsequent catheter replacement were retrospectively identified. We evaluated their inadvertent nephrostomy catheter displacement...
March 26, 2018: Clinical Nephrology
https://www.readbyqxmd.com/read/29562863/efficacy-of-the-proximal-balloon-flow-control-method-for-endovascular-coil-embolisation-as-a-novel-adjunctive-technique-a-retrospective-analysis
#15
Tomotaka Ohshima, Shigeru Miyachi, Naoki Matsuo, Reo Kawaguchi, Aichi Niwa, Ryuya Maejima, Taiki Isaji, Masakazu Takayasu
Background and purpose In our previous study, we established the utility of 8-F balloon guide catheters for anterior circulation aneurysms. This study aims to assess the efficacy of the proximal flow control method using 8-F balloon guide catheters for coil deployment into the aneurysms as a novel adjunctive technique for aneurysmal coil embolisation along with local balloon neck remodeling, stent assist and double catheter techniques. Materials and methods We retrospectively analysed patients who underwent endovascular coiling of anterior circulation aneurysms between August 2013 and December 2017...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29555729/catheter-exchange-technique-for-the-wingspan-stent-technical-note
#16
W S Lesley, R Rangaswamy
BACKGROUND AND PURPOSE: The only Food and Drug Administration-approved implant for managing intracranial stenosis is the Wingspan stent. Modification of the standard Wingspan stent delivery procedure has not been previously reported. MATERIAL AND METHODS: Retrospective, single-patient, technical report. RESULTS: Following uneventful balloon angioplasty, a symptomatic intracranial vertebral artery stenosis was inaccessible to Wingspan stent delivery using standard procedural protocol because of poor proximal guide catheter purchase...
April 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29521472/guideliner%C3%A2-as-guide-catheter-extension-for-the-unreachable-mammary-bypass-graft
#17
Alec Vishnevsky, Michael P Savage, David L Fischman
Percutaneous coronary intervention (PCI) of mammary artery bypass grafts through a trans-radial (TR) approach can present unique challenges, including coaxial vessel engagement of the guiding catheter, adequate visualization of the target lesion, sufficient backup support for equipment delivery, and the ability to reach very distal lesions. The GuideLiner catheter, a rapid exchange monorail mother-in-daughter system, facilitates successful interventions in such challenging anatomy. We present a case of a patient undergoing PCI of a right internal mammary artery (RIMA) graft via TR access in whom the graft could not be engaged with any guiding catheter...
March 9, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29514546/efficacy-and-safety-of-peripherally-inserted-central-venous-catheters-in-acute-cardiac-care-management
#18
Fabrizio Poletti, Claudio Coccino, Davide Monolo, Paolo Crespi, Giorgio Ciccioli, Giuseppe Cordio, Giovanni Seveso, Stefano De Servi
PURPOSE: Patients admitted to cardiac intensive care unit need administration of drugs intravenously often in concomitance of therapeutic techniques such as non-invasive ventilation, continuous renal replacement therapy and intra-aortic balloon counterpulsation. Therefore, the insertion of central venous catheters provides a reliable access for delivering medications, laboratory testing and hemodynamic monitoring, but it is associated with the risk of important complications. In our study, we tested the efficacy and safety of peripherally inserted central catheters to manage cardiac intensive care...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29497785/transcervical-access-via-direct-neck-exposure-for-neurointerventional-procedures-in-the-hybrid-angiosuite
#19
Jong Young Lee, Jong-Hwa Park, Hong Jun Jeon, Dae Young Yoon, Seoung Woo Park, Byung Moon Cho
PURPOSE: A complicated course of the femoral route for neurointervention can prevent approaching the target. Thus, we determined whether transcervical access in the hybrid angiosuite is applicable and beneficial in real practice. METHODS: From January 2014 to March 2017, this approach was used in 17 of 453 (3.75%) cases: 11 cerebral aneurysms (4 ruptured, 7 unruptured), 4 acute occlusions of the large cerebral artery, 1 proximal internal carotid artery (ICA) stenosis, and 1 direct carotid cavernous fistula (CCF)...
May 2018: Neuroradiology
https://www.readbyqxmd.com/read/29468288/efficacy-of-mechanical-thrombectomy-using-stent-retriever-and-balloon-guiding-catheter
#20
S Kammerer, R du Mesnil de Rochemont, M Wagner, S -J You, S Tritt, M Mueller-Eschner, F C Keil, A Lauer, J Berkefeld
PURPOSE: Intra-arterial therapy of acute ischemic stroke has developed rapidly in recent years. Due to proven efficacy in randomized trials, stent retrievers were replacing first-generation thrombectomy devices and have been defined as method of choice. However, aspiration catheters or a combination of several techniques have shown promising rates of successful recanalizations. To create a basis for comparison of the new approaches according to real-world data, we determined the first pass recanalization rate of an evidence-based standard technique with the use of a stent retriever in combination with a balloon-guiding catheter...
May 2018: Cardiovascular and Interventional Radiology
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