TY - BOOK AU - Felbaum, Daniel R AU - McGowan, Jason E AU - Mueller, Kyle AU - Sandhu, Faheem A AU - Syed, Hasan TI - S2-AI screw placement with the aide of electronic conductivity device monitoring: a retrospective analysis SN - 0940-6719 PY - 2017/// KW - *Electric Conductivity KW - *Ilium/su [Surgery] KW - *Monitoring, Intraoperative/mt [Methods] KW - *Pedicle Screws KW - *Sacrum/su [Surgery] KW - *Spinal Fusion/mt [Methods] KW - Humans KW - Retrospective Studies KW - MedStar Washington Hospital Center KW - Neurosurgery KW - Journal Article N2 - CONCLUSION: To the authors' knowledge, this is the first reported literature combining S2-AI screws with electronic conductivity for immediate intraoperative feedback. This technique has the opportunity to provide surgeons with increased accuracy for placement of S2-AI screws while improving overall radiation safety. This feedback can be particularly helpful when surgeons are learning new techniques such as placement of S2AI screws; METHODS: Two patients were treated by the senior author (FAS) who underwent surgery employing S2-AI fixation utilizing an electronic conductivity device (Pediguard cannulated probe, Spineguard, Paris, France). The surgical technique, case illustrations, and radiographic outcomes are discussed; OBJECTIVE: A report of a novel surgical technique utilizing an electronic conductivity device guidance to aide placement of S2-Alar-Iliac (S2-AI) instrumentation. Electronic conductivity guidance for instrumentation of the thoracolumbar spine is an accepted means of improving intraoperative accuracy. Although commercially available for percutaneous techniques, there is a paucity of literature regarding its use. Percutaneous implantation of S2-AI screws has been previously described as another technique surgeons can avail, primarily employing fluoroscopy as a means of intraoperative feedback. We describe a novel technique that utilizes electronic conductivity as an added feedback measure to increase accuracy of percutaneous S2-AI fixation; RESULTS: Stable and accurate fixation was attained in both patients. There were no peri-operative complications related to hardware placement; STUDY DESIGN: A retrospective analysis of two consecutive patients who underwent a novel surgical technique UR - https://dx.doi.org/10.1007/s00586-017-5242-0 ER -