This study provides etiological data on the prevalence of UIAs in healthy asymptomatic Japanese adults, and may be useful in determining therapeutic managements for UIAs.

Background: Antiplatelet therapy (APT) is indispensable to prevent ischemic complications of unruptured intracranial aneurysms (UICAs); however, long-term APT can cause hemorrhagic complications. We evaluated the rates of use and factors for long-term APT in patients who underwent endovascular embolization of UICA.

In embolization of a cavernous sinus (CS) by transvenous embolization (TVE) for a CS dural arteriovenous fistula (DAVF), selection of embolization coils is difficult owing to the complex anatomical structure of the CS. Moreover, overpacking of the CS with embolization coils may cause permanent cranial nerve palsies. The ED coil-10 (EDC-10) infini is an extremely soft platinum coil without shape-memory that has excellent conformability with surrounding structures. The goal of this study was to evaluate use of the EDC-10 infini coil for embolization of a CS DAVF. Six patients with a CS DAVF were treated with TVE. Refluxing cerebral and ophthalmic veins were embolized with shape-memory type coils other than EDC-10 infini, and CSs were embolized with the EDC-10 infini coils. In five cases, CSs were loosely embolized with EDC-10 infini coils. In one case, reflux of the cerebral vein worsened from the CS during the procedure, and embolization of the CS tightly using three-dimensional shape-memory type coils other than EDC-10 infini. Overall, three to 19 (average 7.3) coils were used fozr each CS and the total coil volume was 33–284 (average 95.1) mm3 in each CS. Postoperative transient abducens palsy occurred in two cases, but both patients recovered completely. There was no case of recurrence. The EDC-10 infini coil showed excellent conformability with the complex inner structure of the CS and excellent safety without postoperative permanent cranial nerve palsy.

No abstract

In carotid artery stenting (CAS), iodinated contrast medium is generally required, however, iodinated contrast medium is hard to use for the patient of renal failure and iodine allergy. In 9 carotid artery stenosis in 8 patients with chronic renal failure and iodine allergy. CAS was performed guided by carotid ultrasound and intravascular ultrasound (IVUS) without use of the iodinate contrast medium. Ultrasound was useful for crossing the guidewire, decision of the position of the stent, evaluation of the in-stent plaque protrusion, and measurement of peak systolic velocity (PSV) in the stenotic lesion and the deployed stent. Pre-and post-operative mean PSV measured by ultrasound were 235 ± 115 and 99 ± 42 cm/s, respectively. Ultrasound-guided CAS is therefore suitable for patients with renal failure and iodine allergy, except for cases involving high position, elongated carotid artery stenosis.