P-034 4D DSA for spinal cord vascular malformations exploration: preliminary experience

Background and Purpose Spinal vascular malformations (SVMs) are aggressive diseases that may lead to neurological deficit due to spinal venous engorgement or secondary to hemorrhage.The endovascular treatment of such SVMs may be challenging with a significant risk of failure and/or a risk of severe neurological complications in case of spinal cord vascular supplies compromising. The precise understanding of the angio-architecture of SVMs is of tremendous importance to reduce the risk of treatment failure and the treatment-related complication risk.4D DSA (Siemens Healthcare) is a recently developed technology that has shown its potential for a better understanding of brain AVMs.The purpose of our study was to evaluate the potential of 4D DSA in spinal vascular malformations’ exploration. Material and methods Four consecutive patients (3 males, 1 female, mean age: 49±17 y) with 5 spinal vascular malformations (spinal dural arteriovenous fistula [sDAVF]: n =2, spinal pial arteriovenous fistula [sPAVF]: n = 1 and spinal arteriovenous malformations [sAVMS]: n = 1; one patient had 2 synchronous pial fistulas) had a spinal DSA including 4D DSA acquiiqisition.All the spinal DSA acquisitions were performed under general anesthesia. 4D DSA acquisitions were acquired with the protocol: ‘12sDSA Dyna4D Neuro’. 12 ml of Iodixanol 320 mg of I/ml were injected via a 5F catheter at 1 ml/s during the 12s of the 4D DSA acquisition. The following criteria were evaluated in consensus by two reviewers:- overall quality of the acquisition- number of arterial feeders- location of the primary shunt point- venous drainage pattern: ascending, descending or both. Results In 4/5 of the cases (2 dural AV fistulas; 2 pial AV fistulas), the quality of the acquisition was graded good or fair. Satisfactory concordance between 4D DSA and the selective microcatheterization was observed in these 4 cases for the number of arterial feeders, the location of the shunt point and the venous drainage pattern. In one case of cervical spine AVM, the 4D DSA quality was graded poor and the angio-architecture could not be satisfactorily analysed. Conclusion 4D DSA acquisition may be helpful for a better understanding of spinal vascular malformations’ angio-architecture. Larger series are warranted to confirm these first promising results. Disclosures F. Clarencon: 2; C; Balt, Artedrone, Penumbra. S. Lenck: None. E. Shotar: None. A. Boch: None. K. Premat: None. J. Chiras: None. N. Sourour: 2; C; Medtronic.