US 11,944,374 B2
Electrical signals for retrieval of material from vessel lumens
Gaurav Girdhar, Anaheim Hills, CA (US); and Hoai Nguyen, Westminster, CA (US)
Assigned to COVIDIEN LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Aug. 30, 2021, as Appl. No. 17/446,407.
Prior Publication US 2023/0064470 A1, Mar. 2, 2023
Int. Cl. A61B 18/12 (2006.01); A61B 18/14 (2006.01); A61B 17/221 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1492 (2013.01) [A61B 18/1206 (2013.01); A61B 17/221 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00214 (2013.01); A61B 2018/0041 (2013.01); A61B 2018/0072 (2013.01); A61B 2018/00726 (2013.01); A61B 2018/1422 (2013.01); A61B 2018/1435 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A system for removing a thrombus, the system comprising:
an interventional element configured to engage and retrieve the thrombus within a blood vessel; and
a signal generator in electrical communication with the interventional element, the signal generator configured to provide a voltage having a magnitude within a range from 2 volts to 28 volts, the signal generator further configured to deliver an electrical signal to the interventional element,
wherein the electrical signal includes a waveform having:
a positive phase having a peak positive current and a first duration, and
a negative phase having a peak negative current and a second duration,
wherein a magnitude of the peak positive current is greater than a magnitude of the peak negative current, and the first duration is greater than the second duration.