Patent ID: 9265443
Filing Date: 2016-02-23
CPC Classification: A61B

Claim Text:
1. A monitor electrically couplable to an electrode attached to a tip of a central venous catheter that is insertable into a venous system of a subject, the monitor comprising: a processor; a withdraw indicator coupled to the processor configured to indicate when the tip of the central venous catheter should be withdrawn; and a memory coupled to the processor and having instructions executable by the processor, when executed, the instructions instructing the processor to: store an identifier identifying the subject, determine and store a reference deflection value of a P wave detected by the electrode attached to the tip of the central venous catheter, associate the reference deflection value with the identifier identifying the subject, determine a current deflection value of a current P wave detected by the electrode attached to the tip of the central venous catheter, calculate a current ratio of the current deflection value to the stored reference deflection value, and actuate the withdraw indicator to indicate the tip of the central venous catheter should be withdrawn based on the current ratio.