Snaring of a Glued Microcatheter During Embolization of an Arteriovenous Malformation with N-Butyl Cyanoacrylate

Interventionelle Behandlungsoptionen bei vaskulären Malformationen

Klassifikation von vaskulären Malformationen Während Hämangiome zu den vaskulären Tumoren zählen, sind vaskuläre Malformationen angeboren und bilden sich von selbst nicht zurück. Sie werden nach der ISSVA-Klassifikation unterschieden.

Indikation zur Therapie Ziele der Therapie von Gefäßmalformationen sind die Linderung der Symptome, der Organerhalt und die Verhinderung von Krankheitsprogress und Komplikationen.

Nichtinvasive Therapieoptionen Die Kompressionstherapie sowie physiotherapeutische Maßnahmen zählen zu den wichtigsten konservativen Therapieoptionen.

Invasive Therapieoptionen Die chirurgische Resektion, die oberflächliche Lasertherapie und die interventionelle Therapie stellen die invasiven Therapieoptionen dar. Für die Behandlung symptomatischer Gefäßmalformationen stehen mittlerweile zahlreiche minimalinvasive interventionelle Verfahren zur Verfügung. Slow-Flow-Malformationen können relativ komplikationsarm mittels perkutaner Sklerotherapie behandelt werden, die zu einem zeitversetzten entzündlichen Verschluss der Läsion führt. Dysplastische Venen wie die Marginalvene können mittels endoluminaler Verfahren erfolgreich verödet werden. Die zumeist Katheter-gesteuerten Embolisationsverfahren mittels Flüssigembolisaten, Plugs und Coils erlauben den Verschluss von Fast-Flow-Gefäßmalformationen.

Chronic total occlusion percutaneous coronary intervention: managing perforation complications

INTRODUCTION

Coronary artery perforation (CAP) is an infrequent (<1%) complication of percutaneous coronary intervention (PCI), that can lead to dramatic consequences, including tamponade and death. The incidence of CAP is higher (4-9%) in chronic total occlusion (CTO) PCI due higher complexity of these lesions and the techniques used to recanalized them.

AREAS COVERED

In this Expert Review, we discuss the specific features of CTO PCI predisposing to CAP. We also describe the typical procedural scenarios in which CAP can occur and provide a universal management algorithm. Currently available devices and techniques for CAP treatment are presented in detail. Finally, we discuss imaging support for diagnosis of pericardial effusion in CAP as well as medical and surgical management.

EXPERT OPINION

With increasing volumes and complexity of CTO PCI, the incidence of CAP is likely to rise. Adherence to good catheterization laboratory practices, availability of dedicated equipment to seal CAP, perform pericardiocentesis, and provide hemodynamic support, as well as adequate training, are pillars for the prevention and optimal management of CAP during CTO PCI.

Embolic Agents and Microcatheters for Endovascular Treatment of Cerebral Arteriovenous Malformations

Endovascular embolization of cerebral arteriovenous malformations (AVMs) originally entailed delivery of N-butyl cyanoacrylate glue to the nidus via a flow-directed microcatheter. Within the past decade, several new liquid embolic agents and novel microcatheter technologies have become available that have improved the ease of use and efficacy of endovascular therapies for AVMs. Nonadhesive copolymers, such as Onyx and Precipitating Hydrophobic Injectable Liquid, have largely replaced N-butyl cyanoacrylate given a lower risk of catheter entrapment. The emergence of balloon microcatheters has allowed for improved protection of the normal cerebral vasculature and has improved the penetration of liquid embolics into large AVMs, ultimately reducing procedure times and radiation exposure. Finally, several detachable tip microcatheters have been developed to facilitate removal of the catheter from hardened liquid embolic cast, preventing the morbidity associated with distal catheter entrapment. This article reviews the embolic agents and microcatheters currently available for the treatment of cerebral AVMs in the United States as well as the data demonstrating the safety and efficacy of these devices.