US 11,925,367 B2
Power parameters for ultrasonic catheter
Azita Soltani, Snohomish, WA (US); and Kim R. Volz, Duvall, WA (US)
Assigned to EKOS CORPORATION, Bothell, WA (US)
Filed by EKOS CORPORATION, Bothell, WA (US)
Filed on Dec. 20, 2018, as Appl. No. 16/228,629.
Application 16/228,629 is a continuation of application No. 12/170,342, filed on Jul. 9, 2008, granted, now 10,182,833.
Application 12/170,342 is a continuation in part of application No. 11/971,172, filed on Jan. 8, 2008, granted, now 10,188,410.
Claims priority of provisional application 61/078,236, filed on Jul. 3, 2008.
Claims priority of provisional application 60/969,524, filed on Aug. 31, 2007.
Claims priority of provisional application 60/884,010, filed on Jan. 8, 2007.
Prior Publication US 2019/0216477 A1, Jul. 18, 2019
Int. Cl. A61B 17/22 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/2202 (2013.01) [A61B 2017/00181 (2013.01); A61B 2017/00185 (2013.01); A61B 2017/0019 (2013.01); A61B 2017/00194 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An ultrasound catheter system comprising:
a catheter having at least one ultrasonic element, wherein the catheter is configured to be advanced to a treatment site in a patient's vascular system; and
a control system configured to generate a plurality of power parameters that drive the at least one ultrasonic element to generate ultrasonic energy waves, the control system including a processing unit and control circuitry comprising a hard-wired voltage source;
wherein the control system is configured to implement a non-linear protocol in a control routine to vary non-linearly at least one of selected power parameters of the plurality of power parameters and a physiological parameter;
wherein the plurality of power parameters are selected from the group consisting of peak power, pulse repetition frequency (PRF), pulse width, duty cycle, peak rarefactional pressure, spatial peak pulse average intensity, spatial peak time average intensity, or any combination thereof, and the physiological parameter comprises at least one of mechanical index and soft tissue thermal index, or any combination thereof;
wherein when the PRF is not the power parameter selected to be varied non-linearly, the PRF is selected to be varied linearly.