scholarly journals Investigation of the pressure gradient of embolic protection devices

2016 ◽  
Vol 2 (1) ◽  
pp. 359-362 ◽  
Author(s):  
Anja Kurzhals ◽  
Jörn-Bo Matthies ◽  
Reimer Andresen ◽  
Niels Grabow ◽  
Klaus-Peter Schmitz ◽  
...  
Keyword(s):  
Blood Flow ◽  
Carotid Artery ◽  
Pressure Gradient ◽  
Internal Carotid ◽  
Porous Membranes ◽  
Microscopic Structure ◽  
Silicone Tube ◽  
Test Setup ◽  
Embolic Protection ◽  
Protection Devices

AbstractTo avoid debris coming to the cerebral vessels during carotid artery stenting, embolic protection devices (EPD) are placed in front of the lesion. To evaluate their influence on the antegrade blood flow a test setup with a silicone tube simulating the internal carotid artery is realized. The pressure gradient of five different EPD was measured while particles were brought into the circuit and were caught by the systems. Additionally the microscopic structure of the systems was observed to correlate the morphology and the pressure gradient. The FiberNet device had the lowest pressure gradient. It was the only system that consists of fibers contrary to the systems RX Accunet, Angioguard RX, FilterWireEZ and EmboshieldNAV that contain porous membranes.

scholarly journals Test setup for characterizing the efficacy of embolic protection devices

2015 ◽  
Vol 1 (1) ◽  
pp. 454-457 ◽  
Author(s):  
J.-B. Matthies ◽  
A. Kurzhals ◽  
W. Schmidt ◽  
A. Atamna ◽  
R. Andresen ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Test Setup ◽  
Embolic Protection ◽  
Left Behind ◽  
Arterial Plaque ◽  
Protection Devices ◽  
Particulate Debris ◽  
Cranial Vessels

AbstractSystems for embolic protection are applied during the dilatation and the implantation of stents in the carotid artery. They are used to avoid downstream drift of arterial plaque particles which may be released during the intervention. Such particulate debris increases the risk of stroke when reaching and occluding even minor cranial vessels. Embolic protection devices (EPD) are intended to collect such particles during intervention and to finally remove them.A test setup was developed in order to assess the effi-cacy of commercially available EPDs. The setup considers the introduction of relevant particles, as well as typical anatomic conditions. The EPDs could be tested using curved and ovalized vessel types to simulate stressed vessel conditions. Furthermore, a method for counting the particles was established to quantify collected particles in the EPD, the leaked particles and those which were left behind in the vessel.

Impact of transient hypotension on regional cerebral blood flow in humans

2015 ◽  
Vol 129 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Nia C.S. Lewis ◽  
Kurt J. Smith ◽  
Anthony R. Bain ◽  
Kevin W. Wildfong ◽  
Tianne Numan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Vertebral Artery ◽  
Regional Cerebral Blood Flow ◽  
Internal Carotid ◽  
Regional Cerebral Blood

Diameter reductions in the internal carotid artery (ICA) and vertebral artery (VA) contribute to the decline in brain blood with hypotension. The decline in vertebral blood flow with hypotension was greater when carbon dioxide was low; this was not apparent in the ICA.

Clinical Utility of Quantitative Cerebral Blood Flow Measurements during Internal Carotid Artery Test Occlusions

Neurosurgery ◽  
2002 ◽  
Vol 50 (5) ◽  
pp. 996-1005 ◽  
Author(s):  
Randolph S. Marshall ◽  
Ronald M. Lazar ◽  
William L. Young ◽  
Robert A. Solomon ◽  
Shailendra Joshi ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Clinical Utility ◽  
Internal Carotid ◽  
Flow Measurements ◽  
Blood Flow Measurements

Retinal macroaneurysm after carotid endarterectomy in patient with chronic ischemic retinopathy associated with hemodynamically significant stenosis of the internal carotid artery (clinical case)

2021 ◽  
pp. 274-277
Author(s):  
V.V. Tuzlaev ◽  
◽  
O.V. Kolenko ◽  
V.V. Egorov ◽  
I.Z. Kravchenko ◽  
...  
Keyword(s):  
Blood Flow ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Carotid Endarterectomy ◽  
Clinical Case ◽  
Internal Carotid ◽  
Significant Stenosis ◽  
Ischemic Retinopathy ◽  
Retinal Macroaneurysm ◽  
Intraretinal Hemorrhages

Purpose. To present a clinical case of development of retinal macroaneurysm after carotid endarterectomy (CE) in patient with chronic ischemic retinopathy (CIR) associated with hemodynamically significant stenosis of the internal carotid artery (ICA). Material and methods. Patient R., 74 years old, diagnosed with CIR of the 1st degree of severity of the right eye. In addition to standard ophthalmic examination methods, Doppler ultrasound with registration of blood flow in the orbital artery and spiral computed tomography of the ICA were performed. Results. Panretinal photocoagulation (PRP) of the retina led to obliteration of the retinal macroaneurysm, resorption of intraretinal hemorrhages, and stabilization of the course of CIR after CE of the ICA. Conclusion. The appearance of retinal macroaneurysm and intraretinal hemorrhages after CE in patient with CIR associated with hemodynamically significant ICA stenosis can be regarded as reperfusion complications after restoration of blood flow in the orbital artery, which requires timely retinal PRP of the retina. Key words: chronic ischemic retinopathy, retinal macroaneurysm, internal carotid artery, carotid endarterectomy.

Management of Mobile Thrombus With Distal Protection Devices During Carotid Artery Angioplasty: 2-Dimensional Operative Video

2021 ◽  
Author(s):  
Salomon Cohen-Cohen ◽  
Giuseppe Lanzino ◽  
Waleed Brinjikji ◽  
Adam Arthur ◽  
Mark Bain ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Mechanical Thrombectomy ◽  
Standard Of Care ◽  
Video Production ◽  
Left Internal Carotid Artery ◽  
Left Middle Cerebral Artery ◽  
Cerebral Angiogram ◽  
Protection Devices

Abstract Embolic protection devices (EPDs) have become a standard of care during internal carotid artery revascularization.1,2 This video is about a 57-yr-old-male who presented with a wake-up stroke with a left hemispheric syndrome. Head computed tomography angiography (CTA) revealed tandem occlusions of the proximal left internal carotid artery (ICA) and of the distal left middle cerebral artery (MCA) with an ASPECT (Alberta Stroke Program Early CT Score) score of 6. The patient underwent a cerebral angiogram and was treated with balloon angioplasty with a distal EPD and mechanical thrombectomy. The EPD became occluded with thrombus from the ICA and was retrieved through a 6-Fr Sofia (MicroVention) under continuous aspiration. Successful revascularization of the proximal ICA and distal MCA was achieved. No procedure-related complications occurred, and the patient's neurological exam improved. Tandem occlusions can occur in up to 15% of strokes. The optimal treatment can be controversial, but mechanical thrombectomy and ICA revascularization with a distal EPD appear to be safe and effective in selected patients.3 Consent was obtained for the procedure and for the video production.

scholarly journals CRT-300.04 Comparison of Devices in Carotid Artery Stenting: A Vascular Quality Initiative Analysis of Commonly Used Carotid Stents and Embolic Protection Devices

2017 ◽  
Vol 10 (3) ◽  
pp. S41
Author(s):  
Ashwat S. Dhillon ◽  
Sisi Li ◽  
Juan Pablo Lewinger ◽  
Leonardo C. Clavijo ◽  
David M. Shavelle ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Carotid Artery Stenting ◽  
Embolic Protection ◽  
Protection Devices
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