Abstract
BackgroundHemodynamic therapy with Flow-Diverters has become a fundamental option for treatment of cerebral aneurysms. A major obstacle of Flow-Diverters is the comparatively stiff microcatheter required for implantation. Consequentially, maneuverability is limited and primary catheterization of peripheral targets may be difficult or even futile in challenging vascular anatomies. To overcome this, a highly navigable microcatheter must be used to attain the desired vascular segment, followed by a hardly controllable exchange-maneuver via a long microwire, involving a high risk for wire-perforation. Our study aimed to investigate the value of low-profile stent-retrievers as a railway for introduction of the required microcatheter, which allows to maintain a stable endovascular position and reduce the risk for procedural vessel injury.Methods14cases (8females, mean-age 59y) of Flow-Diverter-Implantation requiring the use of a low-profile stent-retriever were reviewed. All cases featured a challenging vascular anatomy. After micro-catheterization of the desired segment, the stent-retriever was carefully deployed as an anchor in a secure, distal location. In all cases a pREset/LITE-stent-retriever was used for introduction of the equipment required for implantation.ResultsIn all cases the anchoring-maneuver was performed without technical complications. The stent-retrievers maintained a stable position after deployment in all situations. No potential traumatic sudden movements of the microcatheter occurred. No procedure-related perforations, dissections or vasospasms were observable during the interventions or their aftermath.ConclusionsIn our experience the stent-retriever-anchoring-maneuver represents a potentially essential and safe amendment for flow diverter treatment in technically challenging situations.
Highlights
Neurovascular stenting using low profile flow diverter stents (FDS) or braided aneurysms stents composed of a less dense mesh for treatment of especially peripheral and small cerebral aneurysms has gained significant importance during recent years (Möhlenbruch et al, 2017; Voigt et al, 2017; Schob et al, 2019a; Martínez-Galdámez et al, 2019; Aydin et al, 2017; Iosif & Biondi, 2019)
The uniquely appreciable feature associated with flow diversion (FD) is the peri-procedural avoidance of the
Primary probation of the vascular target with the catheter intended for FDS implantation may prove to be very difficult or even futile in demanding vascular anatomies
Summary
Neurovascular stenting using low profile flow diverter stents (FDS) or braided aneurysms stents composed of a less dense mesh for treatment of especially peripheral and small cerebral aneurysms has gained significant importance during recent years (Möhlenbruch et al, 2017; Voigt et al, 2017; Schob et al, 2019a; Martínez-Galdámez et al, 2019; Aydin et al, 2017; Iosif & Biondi, 2019). Neurovascular stenting using low profile flow diverter stents (FDS) or braided aneurysms stents composed of a less dense mesh for treatment of especially peripheral and small cerebral aneurysms has gained significant importance during recent years Microcatheters bearing approval for FD implantation necessarily possess comparatively large inner diameters (0.021′′-0.027′′) and exhibit considerable catheter stiffness. As a consequence their maneuverability is limited and frequently causes increased mechanical force along the microcatheter during probation of distal vessel segments (Schob et al, 2019a). A major obstacle of Flow-Diverters is the comparatively stiff microcatheter required for implantation. Our study aimed to investigate the value of low-profile stentretrievers as a railway for introduction of the required microcatheter, which allows to maintain a stable endovascular position and reduce the risk for procedural vessel injury
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