US 11,730,410 B2
Needle impedance electromyography and electrical impedance imaging for enhanced muscle diagnostics
Benjamin Sanchez, Brookline, MA (US); Seward B. Rutkove, Brookline, MA (US); and Hyeuknam Kwon, Newton, MA (US)
Assigned to Beth Israel Deaconess Medical Center, Inc., Boston, MA (US)
Appl. No. 16/613,609
Filed by Beth Israel Deaconess Medical Center, Inc., Boston, MA (US)
PCT Filed May 16, 2018, PCT No. PCT/US2018/033032
§ 371(c)(1), (2) Date Nov. 14, 2019,
PCT Pub. No. WO2018/213495, PCT Pub. Date Nov. 22, 2018.
Claims priority of provisional application 62/506,784, filed on May 16, 2017.
Prior Publication US 2020/0297235 A1, Sep. 24, 2020
Int. Cl. A61B 5/296 (2021.01); A61B 5/0536 (2021.01); A61B 5/0538 (2021.01); A61B 5/00 (2006.01); A61B 5/262 (2021.01)
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
OG exemplary drawing
 
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.