US 12,213,817 B2
Systems and methods for radiographic monitoring of shunts
Scott Robertson, Portland, OR (US); Brian Fahey, Menlo Park, CA (US); Miles Alexander, Fremont, CA (US); Peter Andriola, Castro Valley, CA (US); William Jason Fox, San Mateo, CA (US); and Anthony Pantages, San Jose, CA (US)
Assigned to Shifamed Holdings, LLC, Campbell, CA (US)
Appl. No. 17/919,491
Filed by Shifamed Holdings, LLC, Campbell, CA (US)
PCT Filed Apr. 23, 2021, PCT No. PCT/US2021/028787
§ 371(c)(1), (2) Date Oct. 17, 2022,
PCT Pub. No. WO2021/216964, PCT Pub. Date Oct. 28, 2021.
Claims priority of provisional application 63/014,318, filed on Apr. 23, 2020.
Prior Publication US 2024/0000404 A1, Jan. 4, 2024
Int. Cl. A61B 6/00 (2024.01); A61B 6/12 (2006.01); A61B 6/50 (2024.01)
CPC A61B 6/12 (2013.01) [A61B 6/503 (2013.01); A61B 6/5217 (2013.01); A61B 6/5264 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for monitoring a shunting element implanted in a patient and having a lumen fluidly coupling a first body region of the patient and a second body region of the patient, wherein the lumen of the shunting element is selectively adjustable to control fluid flow therethrough, the method comprising:
receiving a first radiographic image of at least two radiopaque elements associated with the lumen, wherein a spatial relationship between the at least two radiopaque elements varies according to a size of the lumen, and wherein the first radiographic image is taken from a first viewing angle;
receiving a second radiographic image of the at least two radiopaque elements, wherein the second radiographic image is taken from a second viewing angle different than the first viewing angle; and
determining the size of the lumen based, at least in part, on locations of the at least two radiopaque elements in the first and second radiographic images.