Detection of intraneural needle-placement with multiple frequency bioimpedance monitoring: a novel method.

ABSTRACT: Electrical impedance measurements have been used to detect intraneural needle placement, but there is still a lack of precision with this method. The purpose of the study was to develop a method for the discrimination of nerve tissue from other tissue types based on multiple frequency impedance measurements. Impedance measurements with 25 different frequencies between 1.26 and 398 kHz were obtained in eight pigs while placing the tip of a stimulation needle within the sciatic nerve and in other tissues. Various impedance variables and measurement frequencies were tested for tissue discrimination. Best tissue discrimination was obtained by using three different impedance parameters with optimal measurement frequencies: Modulus (126 kHz), Phase angle (40 kHz) and the Delta of the phase angle

SUBMITTER: Kalvoy H 

PROVIDER: S-EPMC4792358 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature