Segmented frame technology focuses on the frame function: according to the long diameter of the aneurysm, select the diameter of the coil to be similar to or slightly larger than the transverse diameter of the aneurysm of the segment. By adjusting the depth and shallow position of the microcatheter, the frame divide it into at least two paragraphs.
The size of the frame in each aneurysm cavity is similar to the transverse diameter of the aneurysm. A hollow frame-like structure formed by coiling along the aneurysm wall should be used. Long coils should be used as much as possible. As the loop spans the tumor neck, 2D coils may have certain advantages.
Interlaced frame technology: The interlaced frame has a good stable structure. The frame at the tumor neck and the frame at the distal end of the tumor cavity are interlaced to provide support and attachment for the frame at the tumor neck. It is not easy to escape and is conducive to completing dense packing of the tumor neck.
The key point of staggered frame is that the first detachable coil is placed at the distal end of the aneurysm cavity to form a frame. After dense embolization in the basket, some of the remaining coils are purposefully placed outside the frame and interwoven with subsequent coiling to form a frame. A frame prevents subsequent baskets from escaping, and the frame are interlaced with each other to increase the stability of the overall structure of the detachable coil. At the same time, the frame on the tumor neck forms a network blocking effect on the tumor neck, reducing the coil opportunity for escape. Thus, the dense filling of the tumor neck is completed.
Partial filling technique: imagine small regular wide-necked aneurysms and sausage-like aneurysms into 2 to 3 regular-shaped parts. In particular, the aneurysm neck and part of the tumor body should be treated as a whole, and the parts should be packed one by one. However, the technical premise is that the microcatheter must be able to safely superselect to the preselected site during actual operation, and at the same time, the microcatheter must remain stable when fill the coil.
Outside the frame filling technique: When using the frame technique, one side of the tumor neck is intentionally reserved slightly larger. When filling the last 1-2 coils in the frame, a coil with appropriate specifications is selected based on the size of the remaining tumor neck. Circles, first fill 3 to 5 circles in the frame, and then withdraw the microcatheter to the tumor neck outside the fame to continue filling. Because the inner part of the basket has been wrapped with the filled coil, the outer part of the frame will not escape the aneurysm.