Systems and methods for guidance and placement of an intravascular device
First Claim
1. A method for guiding a medical device to a desired location within a vasculature of a patient, the method comprising:
- detecting an intravascular ECG signal of the patient;
identifying a P-wave of a waveform of the intravascular ECG signal, the P-wave varying according to proximity of the medical device to the desired location;
determining whether the identified P-wave is elevated;
determining a deflection value of the identified P-wave when the identified P-wave is elevated; and
reporting information relating to a location of the medical device within the vasculature of the patient at least partially according to the determined deflection value of the elevated P-wave.
1 Assignment
0 Petitions
Accused Products
Abstract
A guidance and placement system and associated methods for assisting a clinician in the placement of a catheter or other medical device within the vasculature of a patient is disclosed. In one embodiment, a method for guiding a medical device to a desired location within a vasculature of a patient is also disclosed and comprises detecting an intravascular ECG signal of the patient and identifying a P-wave of a waveform of the intravascular ECG signal, wherein the P-wave varies according to proximity of the medical device to the desired location. The method further comprises determining whether the identified P-wave is elevated, determining a deflection value of the identified P-wave when the identified P-wave is elevated, and reporting information relating to a location of the medical device within the patient'"'"'s vasculature at least partially according to the determined deflection value of the elevated P-wave.
1550 Citations
29 Claims
-
1. A method for guiding a medical device to a desired location within a vasculature of a patient, the method comprising:
-
detecting an intravascular ECG signal of the patient; identifying a P-wave of a waveform of the intravascular ECG signal, the P-wave varying according to proximity of the medical device to the desired location; determining whether the identified P-wave is elevated; determining a deflection value of the identified P-wave when the identified P-wave is elevated; and reporting information relating to a location of the medical device within the vasculature of the patient at least partially according to the determined deflection value of the elevated P-wave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method for guiding a medical device to a desired location within a vasculature of a patient, the method comprising:
-
detecting an intravascular ECG signal of a signal-emitting portion of a heart of the patient by an intravascular ECG sensor component included with the medical device; and determining whether a P-wave of a waveform of the intravascular ECG signal is elevated based on a plurality of predetermined thresholds, the P-wave varying according to a distance of the intravascular ECG sensor component from the signal-emitting portion of the heart, the predetermined thresholds relating to at least one of the following; (a) an amplitude of the P-wave of the intravascular ECG signal within a predetermined range; (b) a slope of the P-wave of the intravascular ECG signal within a predetermined range; and (c) a noise component of the intravascular ECG signal within a predetermined range. - View Dependent Claims (14, 15)
-
-
16. A system for guiding a medical device to a desired location within a vasculature of a patient, comprising:
-
at least an intravascular ECG sensor for detecting an intravascular ECG signal of the patient; a processor that receives the intravascular ECG signal, the processor; identifying a P-wave of a waveform of the intravascular ECG signal, the P-wave varying according to proximity of the medical device to the desired location; determining whether the identified P-wave is elevated; determining a deflection value of the identified P-wave when the identified P-wave is elevated; and reporting information relating to a location of the medical device within the vasculature of the patient at least partially according to the determined deflection value of the elevated P-wave; and an output device that reports the information relating to the location of the medical device. - View Dependent Claims (17, 18, 19, 20)
-
-
21. In a guidance system including a medical device for insertion into a vasculature of a patient, an external ECG sensor component, and an intravascular ECG sensor component included with the medical device, a method for guiding the medical device, the method comprising:
-
(a) identifying a P-wave from a waveform of an intravascular ECG signal from the intravascular ECG sensor component after insertion of the medical device into the vasculature; (b) determining whether at least one of a frequency and an amplitude of the identified P-wave falls within a predetermined range; (c) determining whether a noise component of the intravascular ECG signal falls within a predetermined range; and (d) determining whether the identified P-wave is at an elevated state based upon the determinations of stages (b) and (c). - View Dependent Claims (22, 23, 24, 25, 26, 27)
-
-
28. A method for guiding a catheter to a desired location within a vasculature of a patient, the method comprising:
-
inserting a distal portion of the catheter into the vasculature via an insertion site on a limb of the patient; detecting a baseline ECG signal of the patient via an ECG sensor included with the catheter, the baseline ECG signal being detected when the distal portion of the catheter is disposed between the insertion site and a junction point of the limb with the patient'"'"'s torso ; attempting to identify a baseline P-wave of a waveform of the baseline ECG signal; identifying an intravascular P-wave of a waveform of an intravascular ECG signal, the intravascular ECG signal being detected when the distal portion of the catheter is disposed at a location distal to the junction point of the limb, the intravascular P-wave varying according to proximity of the catheter to the desired location; determining whether the identified intravascular P-wave is elevated; determining a deflection value of the identified intravascular P-wave when the identified intravascular P-wave is elevated; and reporting information relating to a location of the catheter within the vasculature of the patient at least partially according to the determined deflection value of the elevated identified intravascular P-wave. - View Dependent Claims (29)
-
Specification