CPC A61B 5/296 (2021.01) [A61B 5/0536 (2013.01); A61B 5/0538 (2013.01); A61B 5/262 (2021.01); A61B 5/6848 (2013.01)] | 19 Claims |
1. An impedance-EMG needle configured to be inserted into tissue, the impedance-EMG needle comprising:
an insulative shaft of the impedance-EMG needle;
an active EMG electrode, disposed at a distal end of the insulative shaft, configured to measure active electrical properties of the tissue;
a reference EMG electrode disposed on an outer layer of the insulative shaft and extending to the distal end of the insulative shaft;
a plurality of impedance ring electrodes, wherein the plurality of impedance ring electrodes comprises a plurality of current impedance electrodes and a plurality of voltage impedance electrodes and wherein the plurality of voltage impedance electrodes is disposed between the plurality of current impedance electrodes; and
wherein the plurality of impedance ring electrodes is configured to measure passive electrical properties of the tissue in response to an electrical current with a frequency comprising 10 kHz to 10 MHz.
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