Technologies and implementations for a wearable medical device (WMD). The technologies and implementations facilitate improved comfort and usability of WMDs. Additionally, the technologies and implementations include WMDs having wearable cardioverter defibrillator capabilities.

A Wearable Cardioverter Defibrillator (WCD) system comprises an electrode assembly with a permeable ECG electrode and a moisture barrier. In some embodiments, the moisture barrier is configured to reduce drying out of the permeable ECG electrode to improve performance of the WCD system. In a further enhancement, some embodiments of the electrode assembly also include a pillow structure positioned on a non-skin-contacting surface of the electrode assembly to comfortably reduce movement artifact or noise in the received ECG signal.

To provide objective indications of the progression of peripheral neuropathy of patients, a transmitter apparatus is utilized to produce reproducible pulse signals to specified locations on the human body to determine a minimum level of stimulation necessary to elicit a consciously detectable sensation through the generation of a series of pulse signals of varying intensities, and the recordation of the number of pulse signals felt by the patient. Moreover, the nerve velocity of the patient is additionally determined for a patient via the transmitter apparatus and a receiver apparatus detecting body-signals passing along a nerve within the patient and corresponding to the pulse signals applied to the patient. The results of these tests are recorded over time, thereby enabling generation of patient-specific models indicative of the progression of the patient's peripheral neuropathy over time.

A wearable medical monitoring system is provided that includes a support structure worn by a patient, which also housing electrodes and sleep sensors for generating health data. The health data includes ECG data, respiration data, and sleep data, which are used to determine cardiac conditions and sleep disorders. Sleep disorder indexes are formulated with various combinations of sleep factors from the health data of the patient, correlating in time with particular periods of sleep by the patient. In comparing the sleep disorder indexes with respective sleep disorder indicators, potential sleep disorders may be discerned by the monitoring system. Sleep information about the sleep disorders and warnings may be transmitted by the monitoring system to health support entities.

Systems and methods are described herein for selection of a cardiac cycle, or heartbeat, from a plurality of cardiac cycles monitored over time. The cardiac cycle may be selected using various metrics including a single-cycle metric and a cycle-series metric. Further, the selected cardiac cycle may be used for further cardiac analysis (for example, to generate electrical activation times).

A patient-worn ambulatory cardiac monitoring device for monitoring a patient during a patient activity includes at least one physiological sensor configured to detect signals indicative of cardiac activity, an activity sensor and associated circuitry configured to monitor patient movements, and a vibrational sensor configured to monitor a cardio-vibrational signal of the patient. The at least one physiological sensor can include one of an ECG sensor and a heart rate sensor. At least one processor in communication with the at least one physiological sensor, the activity sensor, and the vibrational sensor, is configured to measure, during the patient activity, at least one time interval between an ECG fiducial point in an ECG signal and a cardio-vibrational fiducial point in the cardio-vibrational signal during a cardiac cycle of the patient's heart.

In embodiments, a wearable cardioverter defibrillator (WCD) system includes a support structure for wearing by an ambulatory patient. When worn, the support structure maintains electrodes on the patient's body. Different pairs of these electrodes define different channels, and different patient ECG signals can be sensed from the channels. The ECG signals can be analyzed to determine which one is the best to use, for the WCD system to make a shock/no shock decision. The analysis can be according to widths of the QRS complexes, consistency of the QRS complexes, or heart rate agreement statistics.

A wearable article (1) includes a sensor assembly (104) for sensing biosignals of a wearer of the wearable article, and an electronic device (102) that can be attached to the sensor assembly to receive and the process biosignals. The electronic device is detachable from the garment and includes a housing (128a, 128b). The electronic device is retained in place by means of a magnet (132) within the housing which cooperates with a magnet on the garment. The sensor assembly includes a sensing electrodes and conductors (112; 122a) which couple the sensing electrodes to an interface that is configured to couple the sensed biosignals to the electronic device. The electronic device attaches to the garment at the interface. The electronic device includes one or more contacts (138b) which engage with the interface at the conductors so that biosignals can be coupled to the electronic device. The garment can also include a locating ring (130) to help locate the electronic device on the garment. The electronic device can be easily attached by a wearer, for example with the use of only one hand.

An ambulatory medical device comprising: a monitoring component comprising at least one sensing electrode for detecting a cardiac condition of a patient; at least one processor configured for: adjusting one or more detection parameters for detecting the cardiac condition of the patient based at least in part on at least one of 1) one or more environmental conditions and 2) input received from the monitoring component; and providing at least one of an alarm and a treatment in response to detecting the cardiac condition of the patient based on the adjusted one or more detection parameters.

The present invention provides a method and an apparatus for obtaining relevant characteristic parameters and indexes of tonoarteriogram (TAG) signals, relating to the technical field of blood pressure monitoring. A signal acquisition module acquires TAG signals from a target subject; a signal processing module obtains relevant characteristic parameters and indexes of continuous blood pressure from obtained TAG signals of target subject by calculating and processing through a predetermined mathematical model and a statistical algorithm, wherein the relevant characteristic parameters and indexes of continuous blood pressure include at least one of root mean square value of continuous blood pressure (RMSBP) and standard deviation of continuous blood pressure (SDBP), an evaluation module evaluates the status of continuous blood pressure based on characteristic parameters and indexes obtained from the target subject, an alarm module initiates an alarm when the relevant characteristic parameters and indexes of continuous blood pressure monitored to be abnormal, which allows to monitor the blood pressure of the target user at different period of time, realizing rapid blood pressure measurement, and enabling timely alarms to ensure the safety of the target user.