A non-invasive sensor unit, such as a glove or pad, is adapted to be placed over the chest of an injured person who may be in need of CPR and/or AED. The sensor unit includes a plurality of electrodes for detecting one or more ECG voltages of the person. A controller processes the ECG voltages and displays them on a display, thereby enabling the user to assess whether CPR and/or AED is needed. The sensor unit is adapted to continue to provide ECG data while the user is applying chest compressions to the person. The sensor unit may include accelerometers for reducing artifacts from the ECG voltages that arise from the movement of the user while applying chest compressions. The electrodes are, in some embodiments, capacitive sensors that enable ECG voltages to be detected without requiring direct contact with the skin of the person.

Sensors mounted on a textile include at least one of electrically conductive textile electrodes; single or multiple optically coupled infrared and red emitter and photodiode or photo transistor; and thin film or Resistive Temperature Detector (RTD). Textile electrodes, electrical connections, and electrical functionalization use at least one of nanoparticles, nanostructures, and mesostructures. Conductive thread, for electrical connections, may include a fiber core made from conductive materials such as but not limited to metals, alloys, and graphine structures, and a sheath of insulating materials such as but not limited to nylon, polyester, and cotton.

A guidance and placement system and associated methods for assisting a clinician in the placement of a catheter or other medical device within the vasculature of a patient is disclosed. In one embodiment, a method for guiding a medical device to a desired location within a vasculature of a patient is also disclosed and comprises detecting an intravascular ECG signal of the patient and identifying a P-wave of a waveform of the intravascular ECG signal, wherein the P-wave varies according to proximity of the medical device to the desired location. The method further comprises determining whether the identified P-wave is elevated, determining a deflection value of the identified P-wave when the identified P-wave is elevated, and reporting information relating to a location of the medical device within the patient's vasculature at least partially according to the determined deflection value of the elevated P-wave.

A medical apparatus in which the measurement of an electrocardiogram and the detection of blood leakage that may occur if an accessing unit comes off the patient can be performed accurately without fail, and with which the efficiency in the operation to be performed before the treatment can be improved. A medical apparatus includes a blood purification device including an accessing unit formed of a venous puncture needle stickable into a patient, electrocardiogram-measuring devices closely attached to a skin of the patient and being capable of measuring an electrocardiogram of the patient, and a blood-leakage-detecting device attached to a position near the accessing unit and being capable of detecting blood of the patient that may leak from the accessing unit. The medical apparatus further includes an integrated detecting device provided as a unit including the electrocardiogram-measuring device and the blood-leakage-detecting device.

A biomedical sensor system is disclosed that includes a high impedance conductive electrode having an electrode impedance of at least about 20 kΩ/sq-mil, and a dielectric material on a first side of the electrode for receiving a discharge of an electrical signal from the dielectric material responsive to the presence of a time varying signal adjacent a second side of the dielectric material that is opposite the first side.

A monitoring device suitable for attachment to a surface of a subject, the device having a data collector and a processor. The data collector includes a flexible foil attached to a less flexible socket, where the foil forms a dermal side surface of the data collector for adhesion to a skin surface of a subject to be monitored. To enable communication of electrical signals between the data collector and the processor, the data collector includes a distribution structure formed as a pattern of an electrically conductive material on an outer surface of a foldable sheet. The foldable sheet forms a layer in the flexible foil and having an interface portion which is folded into an aperture in the socket to form a coupling inside the cavity for electrical communication with a matching coupling of the processor when the processor is received in the cavity.

Described herein are methods, apparatuses, and systems for heart monitoring of a patient. The heart monitoring system can be used to take an electrocardiogram (ECG) using only two electrodes. A handheld device can be used to sequentially measure the electrical signal between different positions on a patient's body. The electrical signals can be processed and analyzed to prepare an ECG for the patient, including a 12-lead ECG.

A wearable electronic device includes a device body and a wearing element. The wearing element is connected to the device body. The device body includes a conductive upper cover, a conductive lower cover, an insulating frame and a circuit system. The insulating frame is disposed between the conductive upper cover and the conductive lower cover and forms an accommodating space therewith. The circuit system is disposed in the accommodating space. The conductive upper cover has a first feeding point. The conductive lower cover has a second feeding point. The circuit system is coupled to the first feeding point and the second feeding point respectively.

According to an aspect, there is provided a device for measuring a physiological characteristic of a first subject, the device comprising a first electrode for contacting a part of the body of the first subject; a second electrode for contacting a part of the body of a second subject; and a control unit for obtaining an electrocardiogram, ECG, signal using the electrodes and for processing the ECG signal to determine a measurement of a physiological characteristic of the first subject; wherein the signal comprises a first ECG signal component relating to the first subject and a second ECG signal component relating to the second subject, and the control unit is configured to process the ECG signal obtained from the electrodes to extract the first ECG signal component relating to the first subject and to process the first ECG signal component to determine a measurement of the physiological characteristic of the first subject.

Wrist-worn devices and related methods measure a pulse transit time non-invasively and calculate a blood pressure value using the pulse transit time. A wrist-worn device include a wrist-worn elongate band, at least four EKG or ICG electrodes coupled to the wrist-worn device for detecting a ventricular ejection of a heart, a photo-plethysmogram (PPG) sensor coupled to the wrist-worn device for detecting arrival of a blood pressure pulse at the user's wrist, and a controller configured to calculate a pulse transit time (PTT) for the blood pressure pulse. The controller calculates one or more blood pressure values for the user based on the PTT.