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AJNR - American Journal of Neuroradiology

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Effect of Guglielmi Detachable Coil Placement on Intraaneurysmal Pressure: Experimental Study in Canines

Angelika Sorteberg^a, Wilhelm Sorteberg^a, Aquilla S. Turk^a, Alan Rappe^a, Per Hj Nakstad^a and Charles M. Strother^a

^a From the Department of Neurosurgery (A.S., W.S.) and Department of Radiology, Section of Neuroradiology (P.H.N.), Rikshospitalet, The National Hospital, Oslo, Norway; Department of Radiology (A.S.T., A.R., C.M.S.), University of Wisconsin Health Sciences Center, Madison.

View larger version (152K): [in a new window]   FIG 1. DSA image shows a bifurcation and a lateral aneurysm. The pressure wire is in place in the dome of the bifurcation aneurysm. The pressure sensor is at the junction of the radiopaque and nonradiopaque portion of the wire (arrow). A dime is taped to the neck of the animal

View larger version (23K): [in a new window]   FIG 2. Pressure trace in the dome of a lateral aneurysm during injection of 30 mL/s saline over 2 s. The pressure amplitude, mean pressure, upstroke, and downstroke of the saline injection are indicated

View larger version (35K): [in a new window]   FIG 3. Pressures observed during injections of 10, 20, and 30 mL saline over 1 or 2 s. The volume, not the duration of injection, correlated with the magnitude of the pressure increases

View larger version (32K): [in a new window]   FIG 4. Pressures in the parent artery versus the dome of the aneurysm during the injection of saline at 20 mL/s

View larger version (41K): [in a new window]   FIG 5. Pressures in the dome of an aneurysm during injections of 10, 20, and 30 mL of saline over 2 s before and after complete coil placement. The mean pressure was unaffected by coil placement, whereas the pressure amplitude was attenuated

View larger version (33K): [in a new window]   FIG 6. Pressure trace from the dome of an aneurysm before GDC coiling (top) and after complete GDC placement (bottom) during injections of 10 mL of saline over 2 s. Neither baseline pressure nor the induced pressure increase was reduced after coiling. The upstroke of the pressure increase decelerates after saline injection (dotted lines)