Embolectomy in a Rabbit Acute Arterial Occlusion Model Using a Novel Electromechanical Extraction Device
J. Hartmana,b,
W. Small, IVc,
T.S. Wilsonc,
J. Brocka,
P.R. Buckleyc,
W.J. Benettc,
J.M. Logec and
D.J. Maitlandc
a Department of Radiology, University of California-Davis School of Medicine, Sacramento, Calif
b Kaiser Permanente Medical Center, Sacramento, Calif
c Lawrence Livermore National Laboratory, Livermore, Calif
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Fig 1. Electromechanical embolectomy device in its corkscrew form.
A, The SMP-nitinol corkscrew microactuator is mounted at the distal end of a microcatheter. The copper leads (and nitinol wire) extend from the proximal end of the microcatheter for connection to the power supply. A close-up of the microactuator showing the radiopaque gold markers (arrows) is seen in the inset. Scale divisions are in millimeters.
B, Microscope image of the microactuator showing the copper-wound nitinol wire encapsulated by the SMP. The diameter of the microactuator is 0.3 mm (0.012 inches). Scale bar = 1 mm.
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Fig 2. Angiographic images of the 2nd rabbit.
A, Baseline angiogram of the right CCA and branch vessels acquired before clot injection.
B, Angiogram showing occlusion of the CCA.
C, Fluoroscopic image showing placement of the device into the ECA distal to the occlusion (radiopaque markers indicated by arrows). The copper-wound nitinol was visible on the fluoroscopy monitors but not on the video tape recording used to capture the image.
D, Posttreatment angiogram showing complete restoration of blood flow. A photograph of the retrieved clot is shown in the inset (scale divisions in millimeters).
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