Abstract:
This disclosure is directed to systems and techniques for detecting change in patient health based upon peak and non-peak patient activity data. In some examples, the peak and non-peak patient activity data correspond to one or more peak (time) periods and the one or more non-peak periods, respectively, where at least one peak period and at least one non-peak period corresponds a highest activity level and a lowest activity level, respectively, for a single day. If a change in patient health is detected, the techniques described herein may direct a medical device to generate for display output indicating the detection of the change in patient health.
Abstract:
Systems and methods for are disclosed for determining whether to output an indication of a urinary tract infection (UTI) in a patient, based on sensor data indicative of one or more common symptoms of UTIs, including, but not limited to, nocturia, fatigue or tremors; fever or chills; agitation or restlessness; lower back pain; painful urination; and presyncope or syncope.
Abstract:
This disclosure is directed to devices, systems, and techniques for monitoring a patient condition. In some examples, a medical device system includes processing circuitry configured to determine a plurality of pulse transit time (PTT) intervals, determine, based on an accelerometer signal, a posture of a patient from a plurality of postures corresponding to each PTT interval of the plurality of PTT intervals, classify each PTT interval of the plurality of PTT intervals based on the respective posture of the patient corresponding to the respective PTT interval, and monitor, based on the classified plurality of PTT intervals, a patient condition.
Abstract:
This disclosure is directed to devices, systems, and techniques for detecting one or more coughs in a patient. In some examples, a medical device a medical device includes a plurality of electrodes configured to collect an electrogram (EGM) signal; and an accelerometer configured to collect an accelerometer signal, and processing circuitry. The processing circuitry is configured to identify, in the EGM signal, a segment of the EGM signal, identify, a segment of the accelerometer signal which is collected over a period of time, determine whether a parameter value associated with the segment of the accelerometer signal is greater than a threshold parameter value, and increment, in response to the parameter value associated with the segment of the accelerometer signal being greater than the threshold parameter value, a cough count value.
Abstract:
A medical device system and method that includes accelerometer circuitry configured to generate at least one signal, a memory, and processing circuitry coupled to the accelerometer circuitry and the memory. The processing circuitry is configured to monitor a patient for a Sit-To-Stand transition based upon the at least one signal, detect the Sit-to-Stand transition, determine if the patient has been inactive for a predetermined period of time prior to the Sit-to-Stand transition, and if the patient has been inactive for at least the predetermined period of time prior to the Sit-to-Stand transition, determine a body stability score of the patient.
Abstract:
An implantable medical device capable of sensing cardiac signals and delivering cardiac electrical stimulation therapies is enabled to detect a short circuit event. A signal is sensed by a sensing module coupled to electrodes. A controller detects a short circuit event in response to a slope of the sensed signal exceeding a short circuit threshold.
Abstract:
In some examples, processing circuitry of a medical device system determines, for each of a plurality of periods, a plurality of heart rates of a patient based on a cardiac electrogram signal, and identifies a first subset of the plurality of heart rates as nighttime heart rates and a second subset of the plurality of heart rates as resting heart rates. The processing circuitry determines a representative nighttime heart rate based on the first subset of the plurality of heart rates, determines a representative resting heart rate based on the second subset of the plurality of heart rates, and determines a nocturnal dip base on the representative nighttime heart rate and the representative resting heart rate. The processing circuitry compares at least one of the representative nighttime heart rate, the representative resting heart rate, and the nocturnal dip in heart rate to a respective threshold value, and determines whether to generate an alert indicating a change in the cardiac function of the patient based on the comparison.
Abstract:
A technique for identifying lead-related conditions, such as insulation breaches and/or externalization of lead conductors, includes analyzing characteristics of electrical signals generated on one or more electrode sensing vectors of the lead by a test signal to determine whether a lead-related condition exists. The characteristics of the electrical signals induced on the lead by the test signal may be significantly different on a lead having an insulation breach or externalized conductor than on a lead not having such lead-related conditions. As such, the implantable medical device may be subject to a known test signal and analyze the signals on the lead to detect lead-related conditions.
Abstract:
An implantable medical device capable of sensing cardiac signals and delivering cardiac electrical stimulation therapies is enabled to detect a short circuit condition on a sensing or therapy vector. A cardiac signal is sensed by a sensing module coupled to electrodes. A control module detects a short circuit condition in response to a significant drop in amplitude of far-field cardiac events coincident to near-field cardiac events. In some instances, the short circuit condition is detected in response an abnormal impedance on the far-field sensing vector and/or a matching morphology of the far-field cardiac electrical signal including the coincident FF cardiac event in addition to the significant drop in amplitude of the coincident FF cardiac events.
Abstract:
A method and device for updating a frequency of determining whether a lead condition is occurring in a medical device that includes sensing a cardiac signal, determining whether a lead condition is occurring in response to the sensed cardiac signal, determining a patient characteristic, and updating a frequency of determining whether the lead condition is occurring in response to the determined patient characteristic.