Kónya A, Wright K C, Wallace S
Department of Diagnostic Radiology, The University of Texas M.D. Anderson Cancer Center, Houston 77030, USA.
J Vasc Interv Radiol. 1998 Mar-Apr;9(2):249-54. doi: 10.1016/s1051-0443(98)70265-9.
To devise and test an occluding coil anchoring system to improve the safety of coil embolization.
The anchoring system was attached to Gianturco embolization coils and investigated in 15 pigs. In the short-term studies, one 0.035-inch anchored coil (15-18 cm in length and 7-10 mm in diameter) was placed in the infrarenal portion of the abdominal aorta in each of 12 pigs with use of an 8-F catheter from the carotid approach. Aortography was performed before and up to 4 hours after coil placement. In the long-term studies, 0.028-inch anchored coils (8 cm in length and 5 mm in diameter) were placed in the left femoral and the right carotid arteries in each of three pigs with use of a 6-F catheter positioned from the right femoral approach. One week later, the animals were evaluated angiographically for coil migration and vascular occlusion.
Radiographically, the coils created a compact conglomerate on placement in all but one of the animals. No coil migration was noted during follow-up. Necropsy confirmed compact arrangement of the coils within the vessels and revealed effective anchoring of the device in all cases.
The anchoring coil has proved effective in making coil embolization safer, especially in a high-flow arterial model.
