Evaluation of the characteristics of various types of coils for the embolization of intracranial aneurysms with an optical pressure sensor system
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : 1.Diagnostic Techniques, Neurological 2.Nervous System Diseases – radiography
- چاپ و سال / کشور: 2011
Description
Introduction In coil embolization for an intracranial aneurysm, it is important to appropriately choose the coil most suitable for coping with various unforeseen situations. Additionally, because dense coil packing of the aneurysm sac is the most important factor to avoid a recurrence, properly selecting the coil is essential. In this article, the authors measured the coil insertion pressure of various types of coils with a newly developed sensor system, and coil characteristics were investigated. Methods The sensor consists of a hemostatic valve connected to the proximal end of a microcatheter. The sensor principle is based on an optical system. Using this, an experimental silicone aneurysm embolization was performed automatically at constant speed. The pattern of the insertion pressure and the maximum insertion pressure (MIP) were analyzed for the various types of coils. The sensor continuously monitored the mechanical force during the insertions. Results The sensor adequately recorded the coil insertion pressure during embolization in each coil. MIP was generally ranked in order of the coil type. The soft type coils required relatively less insertion pressure than standard/helical and 3D type. As for the patterns of coil insertion pressure, each coil presented a saw-like pressure pattern, though we observed some slight differences. 3D type coils showed peak pressure at the moment of “painting”. Coil loop diameters barely affected MIP. However, as to the patterns of pressure, larger size coils more often presented the peak. Conclusions Coil characteristics were well evaluated. The results obtained here reflected some actual clinical experience. Furthermore, collecting the in vivo study is mandatory, which may provide clinically useful data.
Neuroradiology (2011) 53:169–175 DOI 10.1007/s00234-010-0722-5 Received: 8 September 2009 / Accepted: 14 May 2010 / Published online: 3 June 2010
