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, 26 (4), 420-7

Endovascular Treatment of Cerebral Aneurysms Using the Hydrocoil Embolic System


Endovascular Treatment of Cerebral Aneurysms Using the Hydrocoil Embolic System

F Briganti et al. Neuroradiol J.


HydroCoils are platinum helical coils coated with a layer of hydrophilic acrylic polymer (hydrogel), which on contact with blood causes disentanglement of polymer chains and expansion. We retrospectively reviewed a series of 29 patients harboring 29 cerebral aneurysms treated with the Hydrocoil Embolic System in the period 2004-2005, discussing the results of endovascular procedures in terms of safety and efficacy. The immediate post-procedure angiographic control demonstrated complete aneurysm occlusion in 21 cases (72.4%), near-complete occlusion in seven cases (24.1%), whereas in one case (3.4%) there was a procedure failure with major perfusion of the sac. Five patients (17.2%) experienced thromboembolic complications, including an asymptomatic lacunar stroke of the head of the caudate nucleus, a thalamic infarct following hypotension secondary to pulmonary edema, temporal ischemia secondary to vasospasm and a small right occipital ischemic lesion. Only one patient (3.4%) suffered a major ischemic accident. No other procedure-related complication occurred. Three-month follow-up control with MR angiography and 12-month follow-up angiography demonstrated no recurrence of aneurysms. Overall, after a mean follow-up of 12 months, the clinical outcome was good recovery in 26 patients (89.6%), moderate disability in three patients (10.3%) and no vegetative status or death. Our HydroCoil series supports the safety and midterm durability of hydrogel-coated aneurysm coils in the treatment of cerebral aneurysms.


Figure 1
Figure 1
A) Right-ICA DSA showing anterior communicating artery aneurysms. B) Control after coil deployment.
Figure 2
Figure 2
A) Right-vertebral artery DSA shows basilar tip aneurysms. B) Control after coil deployment.
Figure 3
Figure 3
A) Right-vertebral artery DSA 6 months after the procedure. B) 18-month-MRA TOF 3D MIP reconstruction, showing the stability of the occlusion (case in Figure 2).

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