Adhesive physiological monitoring device
The present disclosure relates to a cardiac monitoring device and systems/methods relating to same. Preferred embodiments may include adhesive layers having channels for transpiring moisture to promote long term adhesion of the device to a subject. The adhesive layer may be surrounded by a non-adhesive lining to inhibit substrate layers from folding under the adhesive. In some embodiments, the adhesive layer may be replaceable. In some embodiments, the adhesive layer may extend beneath a substrate coupled to a housing but not be adhered to the overlying substrate layers. The angles of the edges of the adhesive layer may be configured to minimize peeling forces. Substrate layers above the adhesive layer may be perforated to promote transpiration of moisture and/or provide conformability to the substrate. The perforations may promote anisotropic resistance to compression and/or extension of the substrate.
1. An electronic device for monitoring physiological signals, the device comprising:
a housing enclosing a hardware processor;
a wing extending from the housing and configured to conform to a surface of the user, the wing having a bottom surface, a top surface, and a thickness between the bottom surface and the top surface;
an electrode coupled to the wing, the electrode in electrical communication with the hardware processor;
an adhesive layer coupled to the bottom surface of the wing, the adhesive layer configured to adhere the wing to a user; and
a non-adhesive liner or coating positioned on a peripheral edge of the adhesive layer, the liner or coating configured to prevent the peripheral edge from adhering to the bottom surface of the wing.
2. The electronic device of claim 1 , wherein the adhesive layer comprises a hydrocolloid.
3. The electronic device of claim 1 , wherein the wing is configured to allow moisture to transpire through the thickness of the wing from the bottom surface to the top surface.
4. The electronic device of claim 1 , wherein the wing and/or the adhesive layer comprises a second material different from a first material forming an adhesive matrix, the second material comprising a matrix of fiber configured to wick moisture from the surface of the user.
5. The electronic device of claim 4 , wherein the second material is disposed as a layer above the adhesive layer.
6. The electronic device of claim 4 , wherein the second material comprises wool, nylon, polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE), expanded PTFE (ePTFE), or thermoplastic elastomers (TPE).
7. The electronic device of claim 1 , wherein the wing extends laterally beyond the peripheral edge of the adhesive layer to form a border surrounding at least a portion of the periphery of the adhesive layer.
8. The electronic device of claim 7 , wherein the border extends at least about 9 mm laterally from the peripheral edge of the adhesive layer.
9. The electronic device of claim 1 , wherein the non-adhesive liner or coating comprises a silicone.
10. The electronic device of claim 1 , wherein the adhesive layer is a replaceable adhesive layer, and a peripheral edge of the adhesive layer extends entirely to the peripheral edge of the wing at ends of the wing positioned opposite to the housing.
11. The electronic device of claim 10 , wherein a pull string is positioned between the replaceable adhesive layer and the wing and/or embedded within the adhesive layer, a tail end of the pull string extending beyond the peripheral edge of the wing, wherein the pull string extends a length over a surface area of the adhesive layer, and wherein pulling on the tail end of the pull string is configured to cut through the adhesive layer and/or lift the adhesive layer apart from the wing along the length the pull string extends to facilitate removal of at least a portion of the adhesive layer from the electronic device.
12. The electronic device of claim 11 , wherein the pull string extends a length near a peripheral edge of the adhesive layer, the pull string configured to help facilitate removal of at least a border portion of the adhesive layer.
13. The electronic device of claim 10 , further comprising a tool configured to be inserted between the replaceable adhesive layer and the wing to help remove the replaceable adhesive layer from the electronic device.
14. An electronic device for monitoring physiological signals, the device comprising:
a housing enclosing a hardware processor;
a first wing and a second wing, each wing extending from the housing and configured to conform to a surface of a user, each wing having a bottom surface, a top surface, and a thickness between the bottom surface and the top surface;
an electrode coupled to the first wing, the electrode in electrical communication with the hardware processor and configured to be positioned in conformal contact with the surface of the user;
an adhesive layer coupled to the bottom surface of the first wing, the adhesive layer configured to adhere the wearable device to the user; and
a support layer coupled to the top surface of the first wing and the top surface of the second wing, the support layer having an upper surface, a lower surface interfacing with the top surface of the wings, and a thickness between the upper surface and the lower surface,
wherein the support layer comprises a first portion positioned on the top surface of the first wing and a second portion positioned on the top surface of the second wing, the first portion and second portion of the support layer removably coupled to each other and removable from the wings.
15. The electronic device of claim 14 , wherein the first wing is positioned substantially opposite the second wing relative to the housing along a longitudinal axis.
16. The electronic device of claim 14 , wherein the first portion and the second portion of the support layer are removably coupled to each other by one or more perforations in the support layer.
17. The electronic device of claim 14 , wherein the first portion and second portion of the support layer are removably coupled to each other along an axis that intersects the housing.
18. The electronic device of claim 14 , wherein the support layer comprises an aperture, the aperture being configured to surround the housing, wherein the first portion and the second portion of the support layer are positioned to form the aperture in the support layer.
19. The electronic device of claim 14 , wherein the support layer is more rigid than the wings.