US 12,303,650 B2
Self-clearing catheters and methods of use thereof
Hyowon Lee, West Lafayette, IN (US)
Assigned to Purdue Research Foundation, West Lafayette, IN (US)
Filed by Purdue Research Foundation, West Lafayette, IN (US)
Filed on Sep. 1, 2023, as Appl. No. 18/459,479.
Application 18/459,479 is a division of application No. 16/983,108, filed on Aug. 3, 2020, granted, now 11,752,296.
Application 16/983,108 is a division of application No. 15/054,398, filed on Feb. 26, 2016, granted, now 10,729,879, issued on Aug. 4, 2020.
Claims priority of provisional application 62/121,920, filed on Feb. 27, 2015.
Prior Publication US 2023/0405265 A1, Dec. 21, 2023
Int. Cl. A61M 25/00 (2006.01)
CPC A61M 25/0017 (2013.01) [A61M 2025/0019 (2013.01); A61M 25/0045 (2013.01); A61M 2025/0056 (2013.01); A61M 2205/36 (2013.01); Y10S 977/931 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A self-clearing cannula for placement in a patient, comprising:
an elongated tube portion having an inner surface and an oppositely disposed outer surface, a first end fluidically connectable to a fluid source outside the patient and a second, oppositely disposed end for fluidically communicating with the patient; and
a plurality of magnetic nanoparticles operationally connected to at least a portion of the cannula and positioned 10-20 microns from the outer surface;
wherein the magnetic nanoparticles may be energized by an applied oscillating magnetic field to heat the cannula sufficiently to calcine cellular material occluding the cannula.