公开(公告)号：US20210282671A1

公开(公告)日：2021-09-16

申请号：US16605979

申请日：2019-03-22

申请人： Eccrine Systems, Inc.

发明人： Michelle Hoffman ,  Jason Heikenfeld ,  Jacob A Bertrand ,  Nicholas Bailey

IPC分类号： A61B5/145 ,  A61B10/00 ,  A61B5/01

摘要： Embodiments of the disclosed invention provide wearable devices that use a humidity sensor to measure sweat rate generated from an area of skin. A sensing chamber is continuously filled with a sweat sample, which forms a droplet and alters the humidity measured within the chamber. Once the sweat sample droplet expands to the edge of the chamber, the droplet contacts a wick and is drawn away, so the chamber can fill with a subsequent droplet. The device uses a droplet volume and the time required to reach a maximum humidity to calculate a sweat rate. A pump is used to draw old sweat sample out of the wick to allow extended device operation. Some embodiments also include capacitive sensors to perform back up measurements. Another set of embodiments includes alternatively shaped sensing chambers configured to reduce sample volumes or improve function. A method for determining sweat rate based on humidity sensor measurements is also included.

公开(公告)号：US10736565B2

公开(公告)日：2020-08-11

申请号：US15754141

申请日：2017-10-16

申请人： Eccrine Systems, Inc.

发明人： Gavi Begtrup ,  Austin Morgan ,  Mikel Larson ,  Jacob A. Bertrand ,  Nicholas Bailey ,  Cory Newland ,  Robert Beech ,  Brian Hanley

IPC分类号： A61B5/00 ,  A61B5/145 ,  A61B5/1477 ,  A61B5/0205 ,  A61B5/20 ,  G01N33/487 ,  A61B5/11 ,  A61B5/024 ,  A61B5/053 ,  A61B5/01

摘要： Embodiments of the disclosed invention provide devices and methods to incorporate suspension-based, i.e., hydrogel-based and thixotropic compound-based, ion-selective electrodes and reference electrodes into a wearable sweat sensing device. Embodiments of this device are configured to monitor sweat electrolyte concentrations, trends, and ratios under demanding use conditions. The accompanying method includes use of the disclosed device to track fluid and electrolyte gain and loss in order to produce an electrolyte estimate, such as a sweat electrolyte concentration, a sweat electrolyte concentration trend, a sweat rate, or a concentration ratio between a plurality of electrolytes.

公开(公告)号：US20190008448A1

公开(公告)日：2019-01-10

申请号：US15754141

申请日：2017-10-16

申请人： Eccrine Systems, Inc.

发明人： Gavi Begtrup ,  Austin Morgan ,  Mikel Larson ,  Jacob A. Bertrand ,  Nicholas Bailey ,  Cory Newland ,  Robert Beech ,  Brian Hanley

IPC分类号： A61B5/00 ,  A61B5/145 ,  A61B5/1477 ,  A61B5/0205 ,  A61B5/20 ,  G01N33/487

CPC分类号： A61B5/486 ,  A61B5/01 ,  A61B5/02055 ,  A61B5/02438 ,  A61B5/0533 ,  A61B5/0537 ,  A61B5/1118 ,  A61B5/14517 ,  A61B5/14546 ,  A61B5/1477 ,  A61B5/201 ,  A61B5/4266 ,  A61B5/4872 ,  A61B5/4875 ,  A61B5/6801 ,  A61B5/6833 ,  A61B5/7405 ,  A61B5/7435 ,  A61B5/7455 ,  A61B5/7475 ,  A61B2560/0242 ,  G01N33/48707 ,  G01N33/48792

摘要： Embodiments of the disclosed invention provide devices and methods to incorporate suspension-based, i.e., hydrogel-based and thixotropic compound-based, ion-selective electrodes and reference electrodes into a wearable sweat sensing device. Embodiments of this device are configured to monitor sweat electrolyte concentrations, trends, and ratios under demanding use conditions. The accompanying method includes use of the disclosed device to track fluid and electrolyte gain and loss in order to produce an electrolyte estimate, such as a sweat electrolyte concentration, a sweat electrolyte concentration trend, a sweat rate, or a concentration ratio between a plurality of electrolytes.