Abstract: Thermally deformable face seals and respirators including such face seals. The thermally deformable face seal structures comprise composite phase change materials that mold to the face of a user to provide a personalized but one-size-fits-all facial fit having excellent shape retention after use and long term durability. The phase change material is applied onto a base component to cover all or substantially all of the surface area of the base component and adapts to the face of the user to provide a secure, leak-free seal.

Abstract: Thermally deformable face seals and respirators including such face seals. The thermally deformable face seal structures comprise composite phase change materials that mold to the face of a user to provide a personalized but one-size-fits-all facial fit having excellent shape retention after use and long term durability. The phase change material is applied onto a base component to cover all or substantially all of the surface area of the base component and adapts to the face of the user to provide a secure, leak-free seal.

Abstract: Apparatus and methods for noninvasive spectroscopic measurement of an analyte in a subject that have been optimized for producing uniform and repeatable tissue modulation across test subjects and for the same test subject on different occasions are provided. The apparatus comprises an ergonomically shaped grip that substantially conforms to a subject's hand; a surface for placement of at least one of the subject's fingertips upon grasping the grip; and an optically transparent aperture, or a plurality of apertures, disposed within the surface. A modification to the surface of the apparatus adjacent to the aperture that is detectable via the tactile sense of the subject can be added to provide tactile feedback to the subject to guide correct placement of the fingertip over the aperture. The apparatus and methods can also incorporate feedback methods to guide and optimize placement and conditions of the fingertip to further improve accuracy of measurements.