It is generally accepted that both surgical clamping and endovascular treatment are effective treatments for intracranial aneurysms, but recent clinical practice and comparative studies have shown that endovascular treatment is superior to surgical clamping and has become the treatment of choice for intracranial aneurysms. What is more encouraging is that new methods and materials for endovascular treatment are still emerging and rapidly promoting the treatment of intracranial aneurysms. micrusphere spring coil is a newly introduced aneurysm basket ring with unique advantages in design, which has just been released in China. 1. Materials and methods 1.1. 1.1.1 Case data From May 2011 to July 2011, 14 patients with spontaneous subarachnoid hemorrhage treated with Micrusphere spring coils were selected in our department, with a total of 15 aneurysms. Thirteen had preoperative H-H classification of grade III or better, and one other case had preoperative grade IV. The aneurysms were located in the internal carotid-posterior traffic in XX cases, anterior traffic in XX cases, and middle cerebral artery in SS cases. The aneurysm morphology was all cystic, classified according to size, with 11 micro and small ones, including 4 cases with wide neck, and 4 large and giant ones, including 2 cases with wide neck. 1.1, 2Micrusphere spring rings, the series of spring rings are basket-forming rings, which have the following characteristics in design: 1) the diameter of the first ring is small, 70% of the diameter of the other rings; 2) tightly connected ring design, each ring is 90 degrees to the previous ring, forming a hexagonal structure after release, forming a basket against the wall and keeping the center open; 3) the spring ring achieves a better balance between softness and stability The balance between the softness and stability of the spring ring is good. 1.2. Methods Routinely, Seldinger puncture of the femoral artery was performed under general anesthesia, and conventional whole-brain angiography and 3D rotational angiography were performed with a 5F contrast tube to determine the optimal working angle and to measure the size and neck of the aneurysm. Subsequently, a 6F guiding catheter was delivered into the internal carotid artery, and the SL-10 microcatheter was shaped and then superselected into the aneurysm lumen under the guidance of a microguide wire. Systemic heparinization is performed individually according to the time of aneurysm rupture and the amount of bleeding. The technical sequence of aneurysm embolization is: 1) direct Micrusphere spring coil basketing first; 2) if not possible, Hyperglide or Hyperform balloon assisted basketing; 3) if basketing is still not stable, stenting is considered. Since Micrusphere coils are relatively soft, coils slightly larger than the diameter of the aneurysm are usually selected according to the manufacturer’s recommendations. After basketing, a decreasing diameter Delta series or other brands of filled coils are selected for further filling. micrusphere spring coils are released electrically and can be released quickly with a single cable connection. Results Technical success Micrus spring coils push and retract smoothly in the microcatheter. Markings were clear under fluoroscopy. The Micrusphere coils were very stable after basketing, and the subsequent Delta series or other brands of filled coils filled the basket core. 5 of the 6 wide carotid aneurysms had direct basketing and good coverage of the aneurysm neck, and 1 required balloon-assisted stable basketing and filling. None of them were assisted with stenting. All spring coils were successfully disengaged without non-disengagement or pseudo-disengagement. Immediate versus short-term results Complete dense embolization was achieved in 15 aneurysms (15/16), with one case in which strategic sparing caulking was performed at the neck of the aneurysm to maintain patency of the posterior communicating aneurysm. None had embolization-related complications postoperatively. Except for one patient with preoperative H-H classification grade IV, all 13 patients were successfully discharged within 2 weeks postoperatively, with 14 cases rated 1 or 0 according to the modified Rankin Scale (mRS) and 1 case with a score of 2. Discussion Due to the rapid development of interventional devices, although the technology of intracranial aneurysm intervention is mature, the methods, approaches and concepts are still under constant updating. micrus spring coils are newly introduced and just released in China, especially the micrusphere series, which has the characteristics of unique design, basket formation against the aneurysm wall and open central area after basket formation. Our initial experience after using it is mainly twofold: 1) the woven basket is very stable, especially when a slightly larger diameter than the aneurysm is selected for basket formation, the stable basket creates good conditions for subsequent filling; 2) the aneurysm neck is well covered, and for some large aneurysms with wide necks, good neck coverage can be achieved without balloon assistance, while keeping the aneurysm-carrying artery open, while small aneurysms with relatively wide necks, which used to be thought to be unstable even with balloon assistance, can be covered. For small aneurysms with relatively wide necks, which were not considered to be stable baskets even with balloon assistance, the Micrusphere can also form stable baskets with balloon assistance. Although stenting was included as a technical option in this group, no 1 case required the assistance of stenting. This point is related to. The greatest contribution of intracranial stents in aneurysm intervention is the treatment of wide carotid aneurysms. Stents not only assist in the completion of aneurysm embolization, but also serve the purpose of hemodynamic modification and revascularization. However, it is undeniable that stent-assisted technology faces some practical problems in clinical use, such as: 1) stents are not always delivered in place due to vascular conditions; 2) antiplatelet drugs such as aspirin and poliovirus must be taken for a long time after stent use, and for patients with ruptured aneurysm bleeding, especially those with large bleeding volume, subsequent open hematoma removal, extraventricular drainage is likely to be required The good neck coverage of the Micrusphere ring allows embolization of some wide-necked aneurysms without stent assistance, which not only reduces the operation but also, more importantly, avoids the adverse effects of stent use. This is the greatest advantage we have experienced in using Micrusphere coils. Of course, due to the small number of cases treated and the short follow-up period, this experience and experience is very preliminary, and we believe that with the accumulation of cases, we will have a more objective and accurate evaluation of the advantages and disadvantages of Micrusphere coils.