Electrical Impedance to Assess Facial Nerve Proximity During Robotic Cochlear Implantation.

Reported studies pertaining to needle guidance suggest that tissue impedance available from neuromonitoring systems can be used to discriminate nerve tissue proximity. In this pilot study, the existence of a relationship between intraoperative electrical impedance and tissue density, estimated from computer tomography (CT) images, is evaluated in the mastoid bone of in vivo sheep. In five subjects, nine trajectories were drilled using an image-guided surgical robot.

Influence of partial lateral corpectomy with and without hemilaminectomy on canine thoracolumbar stability: a biomechanical study.

Objective: To analyze the biomechanical changes induced by partial lateral corpectomy (PLC) and a combination of PLC and hemilaminectomy in a T13-L3 spinal segment in nonchondrodystrophic dogs.

Study Design: In vitro biomechanical cadaveric study.

Sample Population: T13-L3 spinal segments (n = 10) of nonchondrodystrophic dogs (weighing, 25-38 kg).