US 11,857,318 B2
Electrochemical impedance spectroscopy
Tzung K. Hsiai, Santa Monica, CA (US); Yu-Chong Tai, Pasadena, CA (US); Rene R. Sevag Packard, Los Angeles, CA (US); Yuan Luo, Pasadena, CA (US); Parinaz Abiri, Los Angeles, CA (US); and Jianguo Ma, Shangdong Province (CN)
Assigned to THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US)
Appl. No. 16/099,742
Filed by THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US)
PCT Filed May 9, 2017, PCT No. PCT/US2017/031779
§ 371(c)(1), (2) Date Nov. 8, 2018,
PCT Pub. No. WO2017/196860, PCT Pub. Date Nov. 16, 2017.
Claims priority of provisional application 62/490,310, filed on Apr. 26, 2017.
Claims priority of provisional application 62/333,608, filed on May 9, 2016.
Prior Publication US 2019/0183392 A1, Jun. 20, 2019
Int. Cl. A61B 5/00 (2006.01); A61B 5/1473 (2006.01); A61B 5/02 (2006.01); A61B 5/0538 (2021.01); G01N 29/06 (2006.01); G01N 29/00 (2006.01); A61B 5/0205 (2006.01); A61B 8/00 (2006.01); G01N 27/02 (2006.01); A61B 8/12 (2006.01); A61B 5/01 (2006.01); A61B 5/0215 (2006.01); A61B 5/026 (2006.01); A61B 5/0537 (2021.01); A61M 25/10 (2013.01)
CPC A61B 5/1473 (2013.01) [A61B 5/0205 (2013.01); A61B 5/02007 (2013.01); A61B 5/0538 (2013.01); A61B 5/6853 (2013.01); A61B 5/7275 (2013.01); A61B 8/445 (2013.01); G01N 27/026 (2013.01); G01N 29/00 (2013.01); G01N 29/06 (2013.01); G01N 29/0654 (2013.01); A61B 5/01 (2013.01); A61B 5/026 (2013.01); A61B 5/0215 (2013.01); A61B 5/0537 (2013.01); A61B 8/12 (2013.01); A61M 2025/1079 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A tissue sensing device comprising:
a first catheter comprising a lumen, a closed distal end, and an open proximal end;
a second catheter comprising a lumen, a distal end, and an open proximal end;
at least one ultrasound transducer positioned within the first catheter lumen near the closed distal end;
an expandable element near the distal end of the second catheter; and
a sensor positioned on the expandable element;
wherein the at least one ultrasound transducer of the first catheter is positioned distal to the expandable element of the second catheter.