Implantable medical device and methods for automated detection of infection
First Claim
1. A method of detecting infection in a patient comprising:
- providing a medical device that is configured to be implanted in a pocket of a patient;
measuring an impedance using a chronically implanted sensor at a plurality of time points, wherein the impedance measurement is taken in the pocket where the medical device is implanted;
measuring the concentration of a chemical species using an implanted chemical sensor;
evaluating the impedance measurement in conjunction with the concentration of the chemical species to determine if infection is indicated, wherein evaluating include comparing the impedance measurement to a detection threshold; and
evaluating additional patient data to detect systemic sepsis including at least one selected from the group consisting of evaluating a respiration rate of the patient to determine if it is greater than 20 breaths per minute and evaluating a heart rate of the patient to determine if it is greater than 90 beats per minute.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to systems, devices, and methods for detecting infections associated with implantable medical devices. In an embodiment, the invention includes a method of detecting infection in a patient including measuring a physiological parameter using a chronically implanted sensor at a plurality of time points and evaluating the physiological parameter measurements to determine if infection is indicated. In an embodiment, the invention includes an implantable medical device including a first chronically implantable sensor configured to generate a first signal corresponding to a physiological parameter and a controller disposed within a housing, the controller configured to evaluate the first physiological parameter signal to determine if an infection is indicated. Other embodiments are also included herein.
-
Citations
19 Claims
-
1. A method of detecting infection in a patient comprising:
-
providing a medical device that is configured to be implanted in a pocket of a patient; measuring an impedance using a chronically implanted sensor at a plurality of time points, wherein the impedance measurement is taken in the pocket where the medical device is implanted; measuring the concentration of a chemical species using an implanted chemical sensor; evaluating the impedance measurement in conjunction with the concentration of the chemical species to determine if infection is indicated, wherein evaluating include comparing the impedance measurement to a detection threshold; and evaluating additional patient data to detect systemic sepsis including at least one selected from the group consisting of evaluating a respiration rate of the patient to determine if it is greater than 20 breaths per minute and evaluating a heart rate of the patient to determine if it is greater than 90 beats per minute. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. An implantable medical device comprising:
-
a housing configured to be disposed in a tissue pocket of a patient; a first electrode disposed on the exterior of the housing configured to provide a first impedance signal; a second electrode disposed on the exterior of the housing configured to provide a second impedance signal; a chemical sensor; a controller disposed within the housing, the controller configured to evaluate the first impedance signal and second impedance signal in conjunction with data from the chemical sensor to determine if an infection is indicated, the controller configured to compare at least one of the first and second impedance signals to a detection threshold; wherein the first and second impedance signals are reflective of impedance within the tissue pocket of the patient; and evaluating additional patient data to detect systemic sepsis including at least one selected from the group consisting of evaluating a respiration rate of the patient to determine if it is greater than 20 breaths per minute and evaluating a heart rate of the patient to determine if it is greater than 90 beats per minute. - View Dependent Claims (16, 17, 18, 19)
-
Specification