RT Journal Article SR Electronic T1 Dual microcatheter and coil/balloon pressure cooker technique for transvenous embolization of cerebrospinal fluid-venous fistulas JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP neurintsurg-2022-019005 DO 10.1136/neurintsurg-2022-019005 A1 Donna Parizadeh A1 Antonio H C Vasconcelos A1 David A Miller A1 Olga P Fermo A1 Thien J Huynh YR 2022 UL http://jnis.bmj.com/content/early/2022/06/14/neurintsurg-2022-019005.abstract AB Cerebrospinal fluid-venous fistula is increasingly recognized as a cause of spontaneous intracranial hypotension.1 Transvenous embolization is emerging as an efficacious minimally invasive treatment.2–4 The procedure aims to embolize paraspinal and foraminal veins draining the fistula; however, complete embolization may be challenging as numerous small venous tributaries at the foraminal venous plexus, including dorsal muscular branches, may serve as additional routes of cerebrospinal fluid egress.5 To ensure curative embolization, we adopted a dual microcatheter pressure cooker technique, previously used for treatment of brain arteriovenous malformations.6 This allows improved control of embolic material reflux and greater chance of complete embolization of the site of the fistula and all potential venous tributaries. Video 1 demonstrates this technique employed in a typical case using Onyx (Medtronic, Minnesota, USA) to embolize a cerebrospinal fluid-venous fistula at the left L1 neural foramen.Video 1 Disclaimer: this video summarises a scientific article published by BMJ Publishing Group Limited (BMJ). The content of this video has not been peer-reviewed and does not constitute medical advice. Any opinions expressed are solely those of the contributors. Viewers should be aware that professionals in the field may have different opinions. BMJ does not endorse any opinions expressed or recommendations discussed. Viewers should not use the content of the video as the basis for any medical treatment. BMJ disclaims all liability and responsibility arising from any reliance placed on the content.