A system and method for classifier-based atrial fibrillation detection with the aid of a digital computer are provided. Electrocardiography (ECG) features and annotated patterns of the features are maintained in a database, at least some of the patterns associated with atrial fibrillation. A classifier is trained based on the annotated patterns. A representation of an ECG signal recorded by one or more ambulatory monitors is received. ECG features in the representation falling within each of the temporal windows are detected. The trained classifier is used to identify patterns of the ECG features. At least one matrix with weights for the patterns are generated. A value indicative of whether portions of the representation are associated the patient experiencing atrial fibrillation is calculated. That one or more of the portions are associated with the patient experiencing atrial fibrillation is determined. An action is taken based on one or more of the determinations.

Disclosed is a vital sign monitoring system. The system comprises a segmented electrode forming an in-plane electrode array, wherein the electrode comprise a skin contacting skin adhering contact layer mounted on an electrode backing material, a deformation sensor arranged for identifying deformation information of the electrode, a signal processor arranged to receive a vital sign signal from the electrode and process the deformation information to remove artefacts from the vital sign signal, wherein the electrode comprises multiple electrode segments and wherein the signal processor is arranged to select that electrode segment that has a lowest deformation of all electrode segments of the electrode.

A blood pressure monitoring device configured to attach and supply air to a blood pressure cuff can include a housing having an interior, a port configured to enable fluid communication between the interior of the housing and an interior of the blood pressure cuff, and an air intake configured to allow ambient air to enter the interior of the housing and further configured to inhibit liquids from entering the interior of the housing. The air intake can define a non-linear passageway for ambient air to enter the interior of the housing. The housing can have a first side and a first inner wall. The air intake can be defined by a first opening in the first side and a second opening in the first inner wall. The first opening can be not aligned with the second opening.

A blood pressure monitor configured to removably mount to a cuff in a substantially symmetrical position with respect to a width of the cuff can include a housing defining an interior, a first port, and a second port. The first port can: secure to a first prong of the cuff when the cuff is mounted in a first orientation; receive and secure to a second prong of the cuff when the cuff is mounted in a second orientation; and enable fluid communication between the interior and at least one of a first fluid passage within the first prong and a second fluid passage within the second prong. The second port can: secure to the second prong of the cuff when the cuff is mounted in the first orientation; and receive and secure to the first prong of the cuff when the cuff is mounted in the second orientation.

An electrocardiogram device configured to transmit at least one signal responsive to a wearer's cardiac electrical activity can include a disposable portion and a reusable portion configured to mechanically and electrically mate with each other. The disposable portion can include a base having at least one mechanical connector portion, a plurality of cables and corresponding external ECG electrodes, and a first plurality of electrical connectors associated with the plurality of cables. The reusable portion can include a cover having at least one mechanical connector portion, a second plurality of electrical connectors configured to electrically connect with the first plurality of electrical connectors of the disposable portion, and an output connector port configured to transmit at least one signal responsive to one or more signals outputted by the external ECG electrodes of the disposable portion.

An assembly for enabling a caregiver to secure a physiological monitoring device to an arm of a user can include the physiological monitoring device a cradle configured to removably secure to the physiological monitoring device and to the user's arm. The physiological monitoring device can include a first connector port configured to electrically connect to a first cable and a first locking tab movable between an extended position and a retracted position. The cradle can include a base, first and second sidewalls, a back wall connected to the base and the first and second sidewalls. The cradle can further include a first opening in the back wall configured to receive the first connector port and a second opening in the first sidewall configured to receive the first locking tab when the physiological monitoring device is secured to the cradle and the first locking tab is in the extended position.

An ambulatory medical device capable of delivering therapy to a patient includes at least one response mechanism having a state capable of being activated by one response button; a controller operatively connected with the at least one response mechanism, the controller including at least one processor coupled with a memory; and a therapy manager component executable by the controller and configured to detect a physiological parameter having a value indicative of a health disorder of the patient, notify the patient of impending therapy delivery in response to the detection of the physiological parameter, monitor the state of each at least one response mechanism within at least one predetermined time period, and delay therapy delivery to the patient in response to detection of a change in the state in a single response mechanism of the at least one response mechanism within the at least one predetermined time period.

An extended wear electrocardiography patch is provided. A flexible backing includes an elongated strip of stretchable material. An electrocardiographic electrode is respectively affixed to and conductively exposed on each end of the elongated strip. A flexible circuit is affixed on each end to the elongated strip and includes a pair of circuit traces each originating within one of the ends of the elongated strip and coupled to one of the electrocardiographic electrodes. A non-conductive receptacle securely adhered on the one end of the elongated strip and includes electrode terminals aligned to interface the pair of circuit traces to an electrocardiography monitor to obtain electrocardiographic signals through the electrocardiographic electrodes. A crypto circuit includes memory programed with a sampling rate for at least one physiological sensor provided at least one of with the electrocardiography monitor and on the flexible backing to instruct the physiological sensor to obtain readings of physiological data.

This disclosure provides an electrode body in which an electrode is firmly fixed to a gel without performing electrolytic polymerization. In the electrode body, at a least part of a surface of an electrode is uneven, at least a part of the uneven surface of the electrode is covered with a gel, the gel has a three-dimensional network structure, at least a part of the uneven surface is in contact with the three-dimensional network structure and is embedded inside the three-dimensional network structure. The electrode is preferably a laminated body in which a resin layer is laminated on both surfaces of a conductive base material. It is more preferably that the conductive base material be a fabric woven from fibers and the uneven surface be a surface of the fabric.

A process for producing a sensor for a biomedical electrode (e.g. an ECG electrode) involves injection molding an electrically conductive resin through a film of a backing material to form the sensor directly in the backing material and coating the contact face of the sensor with a non-polarizable conductive material (e.g. silver-containing material). Additional steps of applying an electrolyte over the non-polarizable conductive material coated on the contact face and applying a liner over the electrolyte results in the biomedical electrode. Biomedical electrode produced thereby have the sensor secured in a film of the backing material with a contact face of the sensor disposed on a first side of the film and a post of the sensor protruding from a second side of the film opposite the first side. The process permits production of one-piece sensors for bioelectrodes in a continuous fashion without the need for studs to retain sensors in a film of the backing material.