Introduction Hydrogel coils have been introduced to efficiently increase the aneurysmal packing volumes which may, in turn, decreases the recurrence rate of the endovasularly treated cerebral aneurysms. There is no definite evidence for this at present, however.

Methods This is a retrospective study of our interventionally coiled aneurysms. We have divided these aneurysms into Ruptured and Unruptured aneurysms and each group has been further subdivided into those treated with either Hydrogel or bare platinum coils. Volume fill is based on use of the Angiocalc program.

Results In 301 patients, we have treated 354 aneurysms, 180 ruptured and 174 unruptured. We used the platinum coils in 95 ruptured and 87 unruptured aneurysms. The hydrocoated coils were used in 85 ruptured and 87 unruptured aneurysms. The average packing volumes resulted from the platinum coils were 46.37% and 52.36% in the ruptured and unruptured aneurysms respectively while the average packing volumes with hydrogel coils in the corresponding groups were 80.64% and 83.72% respectively. Total occlusion (packing volume = 100%) was achieved in 5 (5.26%) ruptured and 6 (6.9%) unruptured aneurysms treated with non-coated coils while it was achieved in 26 (30.59%) ruptured and 30 (34.48%) unruptured aneurysms treated with hydrocoated coils. Good packing volume (60%) was achieved in 29 (30.53%) ruptured and 31 (35.63%) unruptured aneurysms treated with non-coated coils while it was achieved in 71 (83.53%) ruptured and 80 (91.95%) unruptured aneurysms treated with hydrocoated coils. The overall average volume of aneurysms treated with non-coated coils was 156.75 mm³ with an average packing volume of 49.2% while the overall average volume of the aneurysms treated with coated coils was 349.55 mm³ with an average packing volume of 89.2%.

Conclusion Regarding the aneurysmal packing volume, hydrocoils are proved to be more efficient than the conventional bare platinum coils in achieving higher packing densities at our institution. We currently use hydrogel coils for treatment of all coiled patients.

Disclosures M. Darwish: None. A. Ku: None. K. Aziz: None. R. Williams: None.