Patent ID: 9345422
Filing Date: 2016-05-24
CPC Classification: A61B

Claim Text:
1. A method of locating a tip of a central venous catheter based on a reference P wave detected by a reference pair of electrodes, a first P wave detected by a first pair of electrodes disposed near the tip of the central venous catheter, and a second P wave detected by a second pair of electrodes disposed on the central venous catheter and spaced proximally from the first pair, the method comprising: determining a first deflection value as a function of the first P wave; determining a second deflection value as a function of the second P wave; calculating a reference deflection value as a function of the reference P wave; comparing the first deflection value to the second deflection value; comparing the reference P wave with at least one of the first and second P waves; and determining a location of the tip of the central venous catheter based on the comparison of the first and second deflection values and the comparison of the reference P wave with at least one of the first and second P waves.