US 12,290,349 B2
Method for checking a position and/or an orientation of a catheter tip of a catheter
Jens Wildhagen, Hannover (DE); David Thalmann, Kaufungen (DE); and Dejana Vukovic, Melsungen (DE)
Assigned to B. Braun Melsungen AG, Melsungen (DE)
Appl. No. 18/274,358
Filed by B. Braun Melsungen AG, Melsungen (DE)
PCT Filed Feb. 21, 2022, PCT No. PCT/EP2022/054220
§ 371(c)(1), (2) Date Jul. 26, 2023,
PCT Pub. No. WO2022/179976, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 10 2021 201 700.2 (DE), filed on Feb. 23, 2021.
Prior Publication US 2024/0081673 A1, Mar. 14, 2024
Int. Cl. A61B 5/06 (2006.01); A61B 5/00 (2006.01)
CPC A61B 5/068 (2013.01) [A61B 5/6852 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for checking a position and an orientation of a catheter tip of a catheter in a patient's body, the method comprising:
inserting the catheter tip into an access site in the patient's body; and
moving the catheter tip within a vein towards a heart of the patient while:
a) detecting a first electrical potential with a first electrode arranged on the catheter tip and generating a first signal that represents a time curve of the first electrical potential;
b) detecting a second electrical potential with a second electrode arranged on the catheter tip and spaced apart proximally from the first electrode and generating a second signal that represents a time curve of the second electrical potential;
c) generating a differential signal as a function of the first signal and the second signal, the differential signal representing a time curve of an electrical voltage between the first electrode and the second electrode;
d) checking the position and the orientation of the catheter tip by comparing the differential signal and a reference signal that represents a desired position and orientation of the catheter tip; wherein checking the orientation of the catheter tip comprises detecting and evaluating a change in sign of the differential signal, the change in sign representing a change in a polarity of the first electrode and the second electrode.