Provided herein are systems and methods for calculating patient information. The method includes determining a transfer matrix, recording electric potentials via a first set of recording electrodes located at a first set of recording locations to create a first set of recorded signals, and calculating patient information for a set of target locations by applying the transfer matrix to the first set of recorded signals. The transfer matrix is a characterization of electrical properties of tissue between the first set of recording locations and the set of target locations.

Provided herein are systems and methods for calculating patient information. The method includes determining a transfer matrix, recording electric potentials via a first set of recording electrodes located at a first set of recording locations to create a first set of recorded signals, and calculating patient information for a set of target locations by applying the transfer matrix to the first set of recorded signals. The transfer matrix is a characterization of electrical properties of tissue between the first set of recording locations and the set of target locations.

Apparatuses for storage and distribution of headgear having sensors and a gel distribution apparatus can be configured to permit storage of the headgear while also protecting the gel distribution modules of the headgear from being inadvertently actuated for deployment of gel to avoid unintended gel leaks or gel applications. In some embodiments, the storage apparatus can be sized and configured to fit within a vending machine for providing remote distribution of the headgear while also protecting the headgear from damage during falls that can occur when the vending machine is activated to distribute a headgear to a customer. Methods of distributing the headgear can utilize an embodiment of the storage device and/or use of at least one vending machine or a network of vending machines.

Apparatuses for storage and distribution of headgear having sensors and a gel distribution apparatus can be configured to permit storage of the headgear while also protecting the gel distribution modules of the headgear from being inadvertently actuated for deployment of gel to avoid unintended gel leaks or gel applications. In some embodiments, the storage apparatus can be sized and configured to fit within a vending machine for providing remote distribution of the headgear while also protecting the headgear from damage during falls that can occur when the vending machine is activated to distribute a headgear to a customer. Methods of distributing the headgear can utilize an embodiment of the storage device and/or use of at least one vending machine or a network of vending machines.

An electrode patch for use with an external medical device, the electrode patch comprising: a first surface configured to be attached to a skin of a patient monitored by the external medical device, and an indicating mechanism disposed on the electrode patch and configured to indicate an end of a predetermined lifespan of the electrode patch.

The purpose of the present invention is to provide a conductive paste for forming a stretchable conductor having washing durability. The conductive paste for forming a stretchable conductor of the present invention includes conductive particles and a flexible resin, wherein the flexible resin has a water content after being immersed in water of 40° C. for 24 hours of 5% by mass or less, and wherein the flexible resin is contained in an amount of 13% by mass to 35% by mass relative to total solids content in the conductive paste for forming a stretchable conductor.

The purpose of the present invention is to provide a conductive paste for forming a stretchable conductor having washing durability. The conductive paste for forming a stretchable conductor of the present invention includes conductive particles and a flexible resin, wherein the flexible resin has a water content after being immersed in water of 40° C. for 24 hours of 5% by mass or less, and wherein the flexible resin is contained in an amount of 13% by mass to 35% by mass relative to total solids content in the conductive paste for forming a stretchable conductor.

A bio-electrode includes an electro-conductive base material and a living body contact layer. The living body contact layer includes a water-free resin layer and a permeation layer on a surface side of the resin layer where a living body comes into contact. The permeation layer is permeated with water and a water-soluble salt selected from the group consisting of sodium salts, potassium salts, calcium salts, magnesium salts, and betaines. This aims to provide: a dry-type bio-electrode that enables quick signal collection after attachment to skin, the bio-electrode being excellent in electric conductivity and biocompatibility, light-weight, and manufacturable at low cost, and capable of preventing significant reduction in the electric conductivity even when wetted with water or dried; a method for manufacturing the bio-electrode; and a method for measuring a biological signal.

Provided herein is an electronic patch for applying to a wearable item. The electronic patch includes a sensor comprising a sensor pad and a sensor base that together define a stepped arrangement, an electrically conductive underlayer disposed under the sensor base, a circuit layer disposed under the underlayer and electrically coupled to the sensor via the underlayer, a first elastic layer overlying the sensor base and arranged adjacent the sensor pad, and a second elastic layer disposed under the circuit layer. Also provided is a wearable item that includes the aforementioned electronic patch as well as methods of making said wearable item and electronic patch.

Aspects of the disclosure relate to estimation of cardiovascular parameters based on a ballistocardiogram signal. In one example, an apparatus for estimating cardiovascular parameters includes a BCG sensor for producing a BCG signal of a user, a processor, a display, and a memory communicatively coupled to the processor. The processor and the memory are configured to transform the BCG signal to a synthetic whole-body BCG signal by integrating the BCG signal in time twice and zero-phase filtering the BCG signal, estimate the cardiovascular parameters based on the synthetic whole-body BCG signal, and display the cardiovascular parameters to the display. Other aspects, embodiments, and features are also claimed and described.