
pmid: 28391021
Implantation of responsive neurostimulation (RNS) system has been previously discussed in the literature but there is a paucity of data on target accuracy and the use of intraoperative imaging. We describe our experience with 8 patients using intraoperative computed tomography (iCT) during implantation of the NeuroPace RNS system.A frame-based system was used. CT images were obtained and merged with preoperative magnetic resonance imaging and metabolic imaging studies to calculate target coordinates. An occipital entry point with a trajectory parallel to the hippocampus was planned. The leads were placed in the parahippocampal white matter circuitry. iCT images were obtained for immediate confirmation of lead accuracy. Images were computationally merged and superimposed on the magnetic resonance images and final coordinates of the distal contact were compared with the intended target. Targeting error was calculated in each axis as well as Euclidean distance. Preoperative and postoperative seizure frequency per month was used to evaluate outcomes.Fifteen occipitotemporal leads were placed in 8 patients. The vector error means in the x, y, and z planes were 0.57 mm ± 0.44 mm, 0.71 mm ± 0.84 mm, and 2.23 mm ± 1.43 mm, respectively. The mean Euclidean distance error was 2.63 mm ± 1.32 mm. The z axis was found to have a significantly higher error [F2,42 = 12.955; P = 0.001] when compared with the x or y axes. The median preoperative and postoperative seizure frequency per month was 3.4 and 0.78 seizures, respectively.Frame-based stereotactic implantation of the NeuroPace RNS system using iCT is feasible and allows for intraoperative target accuracy confirmation and correction.
Adult, Male, Intraoperative Care, Brain, Middle Aged, Magnetic Resonance Imaging, Neurosurgical Procedures, Prosthesis Implantation, Stereotaxic Techniques, Epilepsy, Complex Partial, Implantable Neurostimulators, Surgery, Computer-Assisted, Preoperative Care, Humans, Female, Tomography, X-Ray Computed, Neuronavigation
Adult, Male, Intraoperative Care, Brain, Middle Aged, Magnetic Resonance Imaging, Neurosurgical Procedures, Prosthesis Implantation, Stereotaxic Techniques, Epilepsy, Complex Partial, Implantable Neurostimulators, Surgery, Computer-Assisted, Preoperative Care, Humans, Female, Tomography, X-Ray Computed, Neuronavigation
| citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 10 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
