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AJNR - American Journal of Neuroradiology

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Role of Electrothrombosis in Aneurysm Treatment with Guglielmi Detachable Coils: An In Vitro Scanning Electron Microscopic Study

Riccardo Padolecchia^a, Guido Guglielmi^a, Michele Puglioli^a, Maura Castagna^a, Vincenzo Nardini^a, Paolo Luigi Collavoli^a, Giulio Guidetti^a, Mauro Dazzi^a, Vanna Zucchi^a and Piero Narducci^a

^a From the Section of Neuroradiology (R.P., M.P., P.L.C.), Pathology Laboratory, Surgical Department (M.C., V.Z.), and Pathology Section, Oncology Department (V.N.), S. Chiara Hospital; Chemical Engineering and Material Science (P.N.), Pisa University; and the Section of Interventional Neuroradiology (G. Gug., G. Gui.), Department of Neurosciences, Rome La Sapienza University, Pisa, Italy.

View larger version (151K): [in a new window]   FIG 1. SEM photograph from a human case shows a thin layer of fibrin over, above, and within the coil (original magnification, x 200)

View larger version (66K): [in a new window]   FIG 2. Photograph shows the experimental setup. The inner electrode (long arrow) is in the plastic container, as is a GDC (short arrow). The GDC delivery wire (double arrows), negative electrode (arrowhead), and positive electrode (double arrowheads) also are shown

View larger version (146K): [in a new window]   FIG 3. SEM photograph of the loops of a GDC obtained without passage of electric current shows deposition of scattered blood components (original magnification, x1000)

View larger version (153K): [in a new window]   FIG 4. SEM photograph of the loops of a GDC obtained after passage of a 1-mA electric current for 30 s shows a thin layer of fibrin and blood components (original magnification, x 200)

View larger version (163K): [in a new window]   FIG 5. SEM photograph of the loops of a GDC obtained after passage of a 1-mA electric current for 90 s shows a thick layer of fibrin and blood components (original magnification, x 200)