SYSTEM AND METHOD FOR MONITORING CARDIOVASCULAR PRESSURE

• US 20100312301A1
• Filed: 06/03/2010
• Published: 12/09/2010
• Est. Priority Date: 06/03/2009
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Stahmann, Jeffrey E.
• Granted Patent: US 8,862,229 B2
• Time in Patent Office: Days
• US Class Current: 607/17
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/02158 provided with two or more sensor elements
• CPC Class Codes: A61B 5/022 by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00
• CPC Class Codes: A61N 1/36564 controlled by blood pressure

Abstract

A method for modulating one or more functions of an implanted medical device is disclosed. The method includes measuring a cardiovascular pressure of a patient; evaluating the cardiovascular pressure based on one or more characteristics of a cardiac cycle of the patient at the time the pressure was measured; and modulating one or more functions of the device based on the pressure. Also disclosed is a method for assessing a cardiovascular pressure of a patient with an implanted medical device that includes detecting one or more characteristics of a cardiac cycle of the patient'"'"'s heart; detecting the cardiovascular pressure of the patient; classifying the cardiovascular pressure based on one or more characteristics of the cardiac cycle of the patient'"'"'s heart; and displaying the cardiovascular pressure along with the classification. Also disclosed is a system for collection and display of a cardiovascular pressure of a patient.

Claims

1. A method for modulating one or more functions of an implanted medical device, comprising:

(a) measuring a cardiovascular pressure of a patient;

(b) evaluating the cardiovascular pressure based on one or more characteristics of a cardiac cycle of the patient at the time the cardiovascular pressure was measured; and

(c) modulating one or more functions of the implanted medical device based on the cardiovascular pressure.

2. The method of claim 1, wherein the cardiovascular pressure comprises at least one of an intravascular pressure and an intracardiac pressure.

3. The method of claim 1, wherein the cardiovascular pressure comprises a pulmonary artery pressure.

4. The method of claim 1, wherein the implanted medical device is capable of providing an applied electrical stimulus to the patient'"'"'s heart.

5. The method of claim 4, wherein the implanted medical device is configured to provide cardiac pacing therapy.

6. The method of claim 1, wherein modulating comprises one or more of decreasing, increasing, stopping and starting one or more functions of the implantable medical device.

7. The method of claim 5, wherein modulating one or more functions of the implanted medical device includes modulating one or more cardiac pacing parameters selected from the group consisting of pacing mode, pacing rate, pacing site, pulse waveform, atrioventricular (AV) interval, biventricular delay, refractory periods, sensitivity of the sensing circuit, upper rate limit, lower rate limit, and hysteresis.

8. A method for assessing a cardiovascular pressure of a patient comprising:

(a) detecting one or more characteristics of a cardiac cycle of the patient'"'"'s heart;

(b) detecting the cardiovascular pressure of the patient;

(c) classifying the cardiovascular pressure based on one or more characteristics of the cardiac cycle of the patient'"'"'s heart at the time the cardiovascular pressure is detected; and

(d) displaying the cardiovascular pressure along with the classification.

9. The method of claim 8, wherein at least one of detecting one or more characteristics of a cardiac cycle, detecting the cardiovascular pressure and classifying the cardiovascular pressure is performed at least in part by an implanted medical device.

10. The method of claim 9, wherein the implanted medical device is configured to provide cardiac pacing therapy.

11. The method of claim 10, further comprising a step of modulating programming of the cardiac pacing therapy based on the cardiovascular pressure.

12. The method of claim 8, wherein the cardiovascular pressure is classified by a scheme selected from the group consisting of:

(i) classifying cardiovascular pressure according to a cardiac cycle type;

(ii) classifying cardiovascular pressure using a majority cardiac cycle type to classify an entire measurement interval, but excluding cycles of a different type from summary calculations;

(iii) classifying cardiovascular pressure using a majority cardiac cycle type to classify an entire measurement interval, and including cycles of a different type in summary calculations; and

(iv) classifying cardiovascular pressure by weighting different types of cardiac cycles with different weights in summary calculations.

13. The method of claim 8, wherein the cardiovascular pressure is classified according to intrinsic cycles and paced cycles.

14. The method of claim 13, wherein the cardiovascular pressure for paced cycles is further classified according to two or more of pacing site, pacing mode, atrioventricular (AV) interval, biventricular delay, pacing waveform and pacing rate.

15. A system for collection and display of a cardiovascular pressure of a patient, comprising:

(a) one or more cardiac cycle sensors capable of generating a first signal indicative of a characteristic of a cardiac cycle of the patient'"'"'s heart;

(b) one or more pressure sensors capable of generating a second signal indicative of a cardiovascular pressure of the patient;

(c) one or more transmitters configured to transmit the first and second signal to a database capable of storing patient information in the form of cardiac cycle data and pressure data;

(d) a processor configured to classify the cardiovascular pressure based on the cardiac cycle data; and

(e) a display showing the classification of the cardiovascular pressure.

16. The system of claim 15, wherein the cardiac cycle sensor is implanted within the patient.

17. The system of claim 15, wherein the cardiac cycle sensor is located external to the patient.

18. The system of claim 15, wherein cardiovascular pressure comprises pulmonary artery pressure.

19. The system of claim 15, wherein one or more cardiovascular pressure sensors are implanted within the patient

20. The system of claim 15, wherein one or more cardiovascular pressure sensors are located external to the patient.