Multi-layered release liner for adhesives

Abstract

A liner assembly (16) includes a first liner (18) with a first material and a second liner (20) with a second material. The liner assembly (16) also include a transfer adhesive (80), wherein the first liner (18) and the second liner (20) are coupled to a respective first surface of the transfer adhesive (80). The liner assembly (16) further includes a base (82), wherein a respective second surface of the transfer adhesive (80) is coupled to a respective first surface of the base (82).

Description

MULTI-LAYERED RELEASE LINER FOR ADHESIVESRELATED APPLICATION

[0001] This application claims priority to and the benefit of U.S. Provisional Application No. 63 / 672,686, entitled “SENSORS WITH ADHESIVE REGIONS” and filed on July 17, 2024, and U.S. Provisional Application No. 63 / 599,913, entitled "SENSORS WITH ADHESIVE REGIONS" and filed on November 16, 2023, each of which is hereby incorporated by reference in its entirety for all purposes.TECHNICAL FIELD

[0002] The present disclosure generally relates to a release liner that provides protection (e.g., preservation, coverage) for adhesives (e.g., adhesive regions) of an object until removal of the release liner from the object to enable application of the object to an intended surface.BACKGROUND

[0003] At times, a release liner may be applied to an adhesive to protect the adhesive from environmental factors and / or damage. That is, the release liner may prevent the adhesive from adhering to an unintended surface. For example, a medical monitoring device used to measure temperature, pressure, oxygen, and / or other physiological characteristics of an individual may include an adhesive to enable application or adherence (e.g., attachment) of the medical monitoring device to skin of the individual, and a release liner may be applied to the adhesive to protect the adhesive.

[0004] This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present disclosure, which are described and / or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it may be understood that these statements are to be read in this light, and not as admissions of prior art.SUMMARY

[0005] Certain embodiments commensurate in scope with the originally claimed subject matter are summarized below. These embodiments are not intended to limit the scope of the disclosure.Indeed, the present disclosure may encompass a variety of forms that may be similar to or different from the embodiments set forth below.

[0006] In certain embodiments, a liner assembly includes a first liner that includes a first material, a second liner that includes a second material, and a transfer adhesive, wherein the first liner and the second liner are coupled to a respective first surface of the transfer adhesive. The liner assembly also includes a base, wherein a respective second surface of the transfer adhesive is coupled to a respective first surface of the base.

[0007] In certain embodiments, an assembly includes a first liner that includes a first material and configured to provide a first cover for a first adhesive of a bandage of a sensor, and a second liner that includes a second material and configured to provide a second for a second adhesive of the bandage of the sensor. The assembly also includes a transfer adhesive on a base, wherein the first liner and the second liner are coupled to a respective first surface of the transfer adhesive.

[0008] In certain embodiments, a method of manufacture of an assembly includes coupling a first liner that includes first properties to a base via a transfer adhesive, coupling a second liner that includes second properties to the base via the transfer adhesive to provide a liner assembly with a release surface formed by the first liner and the second liner, and coupling the liner assembly to a sensor via the release surface of the liner assembly.

[0009] Various refinements of the features noted above may exist in relation to various aspects of the present disclosure. Further features may also be incorporated in these various aspects as well. These refinements and additional features may exist individually or in any combination. For instance, various features discussed below in relation to one or more of the illustrated embodiments may be incorporated into any of the above-described aspects of the present disclosure alone or in any combination. The brief summary presented above is intended only to familiarize the reader with certain aspects and context of embodiments of the present disclosure without limitation to the claimed subject matter.BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Advantages of the disclosed techniques may become apparent upon reading the following detailed description and upon reference to the drawings in which:

[0011] FIG. 1 is a perspective view of an embodiment of a medical monitoring system configured to monitor oxygen saturation, in accordance with an aspect of the present disclosure;

[0012] FIG. 2 is a block diagram of the medical monitoring system of FIG. 1, in accordance with an aspect of the present disclosure;

[0013] FIG. 3 is a perspective exploded view of an embodiment of a sensor with a liner assembly, which may be employed in the medical monitoring system of FIG. 1, in accordance with an aspect of the present disclosure;

[0014] FIG. 4 is a perspective exploded view of an embodiment of the liner assembly and a calibration system that may be employed at manufacturing, in accordance with an aspect of the present disclosure;

[0015] FIG. 5 is a top view of an embodiment of a liner assembly, in accordance with an aspect of the present disclosure;

[0016] FIG. 6 is a top view of an embodiment of a liner assembly, in accordance with an aspect of the present disclosure; and

[0017] FIG. 7 is a top view of an embodiment of a liner assembly, in accordance with an aspect of the present disclosure.DETAILED DESCRIPTION

[0018] One or more specific embodiments will be described below. In an effort to provide a concise description of these embodiments, not all features of an actual implementation are described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementationspecific decisions must be made to achieve the developers’ specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

[0019] When introducing elements of various embodiments of the present disclosure, the articles “a,” “an,” and “the” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. Additionally, it should be understood that references to “one embodiment” or “an embodiment” of the present disclosure are not intended tobe interpreted as excluding the existence of additional embodiments that also incorporate the recited features.

[0020] It is presently recognized that various adhesives may include different adhesive types or materials with different properties (e.g., mechanical and / or chemical properties). Without embodiments disclosed herein, removal of a release liner that includes a material (e.g., single material) may reduce tack or initial adhesion of at least one of the adhesive types or materials. Indeed, the material of the release liner may adhere differently to (e.g., be incompatible with) at least one of the different adhesive types or materials. For example, a binding effect of a silicone adhesive to a silicone-coated release liner may increase difficulty in removal of the release liner. However, the silicone-coated release liner may be compatible with, effectively bind to, and / or be more easily removed from an acrylic adhesive. As may be appreciated, a loss of tack or initial adhesion may reduce effectiveness of an object, such as a sensor, that is intended to be adhered to an intended surface.

[0021] Accordingly, the present disclosure generally relates to a liner assembly (e.g., multilayered release liner, differential release liner) with multiple liners (e.g., different liners, layers, portions, regions, zones) adapted for different adhesive materials of an object, such as different adhesive materials of a surface of the object. For example, the liner assembly may include a first liner (e.g., first liner portion) for a first adhesive (e.g., first adhesive type), a second liner (e.g., second liner portion) for a second adhesive (e.g., second adhesive type), a transfer adhesive, and a base. In this manner, the first liner may provide a respective liner for the first adhesive and the second liner may provide a respective liner for the second adhesive. The first liner may include respective properties (e.g., first properties, first materials) that correspond to the first adhesive of a first adhesive portion (e.g., first surface area, first region or zone) of the object. Moreover, the second liner may include respective properties (e.g., second properties different from the first properties, second materials different from the first materials) that correspond to the second adhesive of a second adhesive portion (e.g., second surface area different from the first surface area, second region or zone different from the first region or zone) of the object.

[0022] A respective first surface (e.g., bottom surface, non-release surface) of the first liner and a respective first surface (e.g., bottom surface, non-release surface) of the second liner may be coupled to the transfer adhesive at a first transfer adhesive surface (e.g., top surface). Moreover, a second transfer adhesive surface (e.g., bottom surface, opposite the top surface) of the transfer adhesive may be coupled to a first base surface (e.g., top surface) of the base. In this manner, thefirst liner and the second liner may be coupled to the base via the transfer adhesive to provide the liner assembly.

[0023] As an example, the object may include a sensor, such as a patient monitoring sensor. The sensor may include a body with a first bandage (e.g., top bandage) and a second bandage (e.g., bottom bandage, a metallized tape). The second bandage may cover a portion of the first bandage (e.g., corresponding to the optical components). The body may include or provide multiple adhesive portions (e.g., zones, regions). In particular, a first adhesive (e.g., first type of adhesive) may be applied to a respective first surface of the first bandage to provide a first adhesive portion (e.g., outer zone or region), and a second adhesive (e.g., second type of adhesive, different than the first type of adhesive) may be applied to a respective first surface of the second bandage to provide a second adhesive portion (e.g., inner zone or region). For example, the first adhesive portion may correspond to a majority of a surface area of the first respective surface of the first bandage (e.g., that does not overlap with or is not covered by the second bandage). As another example, the second adhesive portion may correspond to the surface area of the first respective surface of the second bandage (e.g., different from the first adhesive portion, corresponding to the optical components).

[0024] The first liner may include the respective properties that correspond to the first adhesive portion with the first adhesive of the sensor. For example, the first adhesive may include an acrylic or a rubber adhesive. Thus, the respective properties of the first liner may include properties compatible with the acrylic or rubber adhesive, such as properties provided by the first liner formed by or with a silicone coating. In this manner, the first liner may contact and adhere to the first adhesive portion with the first adhesive and / or enable preser ation of tack or initial adhesion of the first adhesive after removal of the liner assembly from the sensor. The second liner may include the respective properties that correspond to the second adhesive of the sensor. For example, the second adhesive may include a silicone adhesive. Therefore, the respective properties of the second liner may include properties compatible with the silicone adhesive, such as properties provided by the second liner formed by or with polyethylene. As such, the second liner may contact and adhere to the second adhesive portion with the second adhesive and / or enable preservation of tack or initial adhesion of the second adhesive after removal of the liner assembly from the sensor. As described herein, the first liner and the second liner may also be coupled to the base via the transfer adhesive to provide the liner assembly.

[0025] In some embodiments, the first liner, the second liner, the transfer adhesive, and the base may each either be transparent or opaque, based (e.g., depending) on a calibration process of the sensor. Accordingly, the embodiments described herein may include the liner assembly, which may provide multiple liners (e.g., in different zones, regions, or portions of the liner assembly) that may each be adapted for different adhesive types or materials (e.g., acrylic, rubber, silicone) of the object, such as the different adhesives of the sensor. In this manner, the liner assembly may maintain tack or initial adhesion of the different adhesive materials, which in turn improves adhesion of the object to an intended surface after removal of the liner assembly from the object (e.g., improves a peel force of the object).

[0026] With the foregoing in mind, FIG. 1 is a perspective view of an embodiment of a medical monitoring system 10 that includes a patient monitor 12 (also referred to herein as a monitor for convenience) that may be used in conjunction with a medical sensor 14 (also referred to herein as a sensor for convenience). In the illustrated example, the monitor 12 is a pulse oximetry monitor and the sensor 14 is a pulse oximetry sensor. In such cases, the monitor 12 may be configured to process photoplethysmography (PPG) signals to calculate oxygen saturation (SpO2). It should be appreciated that the medical monitoring system 10 may be configured to obtain any of a variety of medical measurements and the techniques descnbed herein may be adapted for use with any variety of monitors and sensors. By way of non-limiting example, in some embodiments, the monitor 12 may include a regional oximeter and the sensor 14 may include a regional saturation sensor. In such cases, the monitor 12 may be configured to process the PPG signals to calculate regional oxygen saturation (rS02). Additionally, although the depicted embodiments illustrate the sensor 14 configured for use on a patient’s finger, it should be understood that the sensor 14 may be adapted for use at other tissue locations, such as a forehead, temple, earlobe, toe, foot, heel, ankle, stomach, chest, back, neck, write, thigh, or any other suitable measurement site (e.g., with pulsatile arterial flow).

[0027] The sensor 14 includes a sensor body 15 that includes multiple layers, such as a backing, a first light blocking layer (e.g., a metallized tape), and a second light blocking layer. The sensor body 15 may also include or support a flexible circuit with various components. The sensor 14 may be reusable, disposable, partially usable, or partially disposable. In certain embodiments, the medical monitoring system 10 may include multiple sensors 14 at multiple locations.

[0028] Further, the sensor 14 may include or be used with a liner assembly 16 (e.g., release liner). For example, the sensor 14 and the liner assembly 16 may be considered to be included asor form a sensor assembly. It should be noted that the liner assembly 16 may include any suitable shape or size, such as larger than a shape of the sensor 14 (e.g., the sensor body 15), similar to the shape of the sensor 14, smaller than the shape of the sensor 14, and / or shaped based on one or more adhesives included on a respective surface or side (e.g., bottom surface or side) of the sensor 14. Indeed, the liner assembly 16 may include alternative and / or additional shapes that may contact the one or more adhesives of the sensor 14 that are used to apply the sensor 14 to a patient. For example, as illustrated in FIG. 1, the liner assembly 16 may be in the shape of a rectangle and / or may be larger than the sensor 14. In this manner, the liner assembly 16 may releasably adhere to and / or cover (e.g., preserve, protect; temporarily cover, such as for packaging between manufacturing and use of the sensor 14 to monitor the patient) the one or more adhesives of the sensor 14 that are used to apply the sensor 14 to the patient. A clinician or any other suitable user may then remove the liner assembly 16 from the sensor 14 before placing the one or more adhesives of the sensor 14 onto tissue of the patient to adhere the sensor 14 to the patient.

[0029] The liner assembly 16 may include multiple liners (e.g., liner portions, liner regions, liner zones), such as a first liner 18 (e.g., first liner portion, first liner region, first liner zone) and a second liner 20 (e.g., second liner portion, second liner region, second liner zone). As described in further detail herein, the first liner 18 may include respective properties that correspond to a first adhesive (e.g., first adhesive type) of a first adhesive portion (e.g., first surface area, first region, first zone) of the sensor 14. Moreover, the second liner 20 may correspond to a second adhesive (e.g., second adhesive type) of a second portion of the sensor 14. The first liner 18 and the second liner 20 may be coupled to a transfer adhesive. Further, the transfer adhesive may be coupled to a base to provide the liner assembly 16. Additional details regarding the liner assembly 16 will be described in further detail herein, such as with respect to FIGS. 3 and 4.

[0030] The sensor 14 is communicatively coupled to the monitor 12. In the illustrated embodiment, the sensor 14 is coupled to the monitor 12 via a cable 21. The cable 21 may interface directly with the sensor 14 and may include multiple conductors (e.g., wires) to transmit signals and / or receive signals. Additionally or alternatively, the sensor 14 may communicate with the monitor 12 wirelessly (e g., the sensor 14 and the monitor 12 include wireless transceivers configured to communicate via any suitable wireless protocol). For example, the sensor 14 may include a transceiver that enables wireless signals to be transmitted to and / or received from an external device (e.g., the monitor 12). Additionally, the multiple conductors or the transceiver may transmit a raw digitized detector signal, a processed digitized detector signal,or a calculated physiological parameter, as well as any data that may be stored in the sensor 14. In operation, the monitor 12 may receive a signal from the sensor 14, and the monitor 12 may be configured to calculate or measure one or more physiological parameters based on the signal. In particular, the monitor 12 may include a processor configured to execute code (e.g., stored in a memory of the monitor 12 or received from another device) for filtering and processing the signal from the sensor 14 to calculate physiological parameters, such as oxygen saturation. The monitor 12 may additionally or alternatively calculate any variety of physiological parameters, such as arterial blood oxygen saturation, regional or tissue oxygen saturation, pulse rate, respiration rate, blood pressure, blood pressure characteristic measure, autoregulation status, brain activity, or any other suitable physiological parameter.

[0031] Additionally, as illustrated in FIG. 1, the monitor 12 includes a display 17 configured to display one or more calculated physiological parameters, such as oxygen saturation. The display 17 may also display other information, such as instructions to charge the sensor 14, alarm indications, settings, and so forth. In certain embodiments, the display 17 may be a touch screen display. The monitor 12 may include various input components, such as the touch screen display, knobs, switches, keys and keypads, buttons, and so forth, to provide for operation and configuration of the monitor 12. The monitor 12 may also include one or more indicator lights and one or more speakers. The monitor 12 may also include additional slot(s) or wireless interfaces (e.g., channels) to connect to additional devices, such as additional sensors to monitor additional physiological parameters of the patient and / or to monitor physiological parameters of other patients at one time.

[0032] Furthermore, one or more functions of the monitor 12 disclosed herein may also be implemented directly in the sensor 14, or by any other suitable device. For example, in some embodiments, the sensor 14 may include one or more processing components configured to calculate physiological parameters, such as oxygen saturation. The sensor 14 may have varying levels of processing power, and may output data in various stages to the monitor 12. For example, in some embodiments, the data output to the monitor 12 may be analog signals, such as detected light signals (e.g., pulse oximetry signals or regional saturation signals), or processed data.

[0033] Further, in some embodiments, the sensor 14 may include a battery to provide power to components of the sensor 14. For example, the sensor 14 may be configured to operate in a wireless mode and, at times, may not receive power from the monitor 12 while operating in thewireless mode. In some embodiments, the battery may be a rechargeable battery such as, for example, a lithium ion, a lithium polymer, a nickel-metal hydride, a nickel-cadmium battery, or any other suitable rechargeable battery. In other embodiments, any suitable power source may be utilized, such as, one or more capacitors or an energy harvesting power supply (e.g., a motion generated energy harvesting device, thermoelectric generated energy harvesting device, or any other suitable energy harvesting power supply). The sensor 14 may also include various structural features to provide comfort, breathabihty, and repositionability, as well as to block tears (e.g., structural damage) to the sensor 14.

[0034] Turning to FIG. 2, a simplified block diagram of the medical monitoring system 10 is illustrated in accordance with an embodiment. The sensor 14 includes optical components in the form of one or more emitters 22 (referred to herein as an emitter for convenience) and one or more detectors 24 (referred to herein as a detector for convenience). The emitter 22 includes at least two light emitting diodes (LEDs) that are configured to emit at least two wavelengths of light, e.g., a red LED 28 configured to emit wavelengths of light within the red spectrum and an infrared (IR) LED 30 configured to emit wavelengths of light within the infrared or near infrared spectrum. In one embodiment, the LEDs 28, 30 emit light in a range of about 600 nanometers (nm) to about 1000 nm. In one embodiment, the red LED 28 is configured to emit light between approximately 600 nm and 735 nm, and the IR LED 30 is configured to emit light between approximately 800 nm and 1000 nm. It should be noted that the emitter 22 may also transmit 3, 4, or 5 or more wavelengths of light in any suitable application. For example, in a pulse oximetry application, the sensor 14 may include one emitter 22 with the red LED 28 and the IR LED 30 that are configured to emit two wavelengths of light. As another example, in a regional oximetry application, the sensor 14 may include two emitters 22 that each include a respective red LED 28 and a respective IR LED 30, and together the two emitters 22 are configured to emit two to four wavelengths of light.

[0035] As discussed in more detail herein, a light drive circuitry 32 of the monitor 12 may provide respective drive currents to the LEDs 28, 30 to cause the LEDs 28, 30 to emit respective wavelengths of light. It should be understood that, as used herein, the term "light" may refer to one or more of ultrasound, radio, microwave, millimeter wave, infrared, visible, ultraviolet, gamma ray or X-ray electromagnetic radiation, and may also include any wavelength within the radio, microwave, infrared, visible, ultraviolet, or X-ray spectra, and that any suitable wavelength of light may be appropriate for use with the present disclosure.

[0036] The emiter 22 emits light that passes through blood perfused tissue, and the detector 24 detects the light as reflected or transmited by the tissue. The emiter 22 and the detector 24 may be arranged in a transmission configuration or a reflectance configuration with respect to one another. In the transmission configuration, the light enters the detector 24 after passing through the tissue of the patient. In the reflectance configuration, the light is reflected by elements in the tissue of the patient to enter the detector 24. In any case, the detector 24 may generate a signal (e.g., PPG signal) indicative of an intensity of the light received at the detector 24, and the detector 24 may send the signal to the monitor 12.

[0037] A signal representing light intensity versus time or a mathematical manipulation of this signal (e.g., a scaled version thereof, a log taken thereof, a scaled version of a log taken thereof) may be referred to as the PPG signal. Additionally, the term “PPG signal,” as used herein, may also refer to an absorption signal (e.g., representing an amount of light absorbed by the tissue) or any suitable mathematical manipulation thereof. The amount of light detected or absorbed may then be used to calculate any of a number of physiological parameters, including oxygen saturation (e.g., the saturation of oxygen in pulsatile blood, SpO2), an amount of a blood constituent (e.g., oxyhemoglobin), and / or a physiological rate (e.g., pulse rate or respiration rate, when each individual pulse or breath occurs). For SpO2, red and IR wavelengths may be used because it has been observed that highly oxygenated blood will absorb relatively less red light and more IR light than blood with a lower oxygen saturation. By comparing the intensities of two wavelengths at different points in the pulse cycle, it is possible to estimate the blood oxygen saturation of hemoglobin in arterial blood, such as from empirical data that may be indexed by values of a ratio, a lookup table, from curve fiting, or other interpolative techniques.

[0038] As shown, the sensor 14 also includes an encoder 34. The encoder 34 may store information about the sensor 14, such as a type of sensor, calibration information, and so forth. When accessed by the monitor 12, the information about the sensor 14 may enable the monitor 12 to calculate oxygen saturation and / or other physiological parameters using the signal received from the detector 24. In certain embodiments, the sensor 14 may include sensing components in addition to, or instead of, the emiter 22 and the detector 24. For example, in one embodiment, the sensor 14 may include one or more actively powered electrodes (e g., four electrodes) to obtain an electroencephalography signal.

[0039] As shown, the monitor 12 includes one or more processors 40, a memory 42, and the display 17. The processor 40 may process the signal received from the detector 24, such as byperforming synchronized demodulation, amplification, and filtering of the signal. The processor 40 may process the signal received from the detector 24 to calculate one or more physiological parameters, such as the oxygen saturation, using various algorithms. Coefficients utilized in the algorithms may be accessed by the processor 40 from the encoder 34 or determined by the processor 40 based on the calibration information of the sensor 14, for example.

[0040] As shown, the monitor 12 includes a time processing unit (TPU) 44, which may be controlled by the processor 40 and is configured to provide timing control signals to the light drive circuitry 32 and optionally to other parts of the medical monitoring system 10. The light drive circuitry 32 may control when the red LED 28 and the IR LED 30 are illuminated and / or a drive current provided to the red LED 28 and the IR LED 30. It should be appreciated that one or more functions or components of the monitor 12 disclosed herein may also be implemented directly in the sensor 14, or by any other suitable device. As described herein, the sensor 14 includes or is used with the liner assembly 16, which includes the multiple liners to align with and cover different adhesive portions of the sensor 14 (e.g., the multiple liners are adapted for different adhesive materials of the sensor 14) to improve a release of the liner assembly 16 from the sensor 14. For example, the liner assembly 16 may release more easily from the sensor 14 and / or the one or more adhesives of the sensor 14 may retain more tack and initial adhesion due to use of the multiple liners (e.g., as compared to a single liner to align with and cover the different adhesive portions of the sensor 14).

[0001] With the foregoing in mind, FIG. 3 is a perspective exploded view of an embodiment of the sensor 14 with the liner assembly 16, which may be employed in the medical monitonng system 10 of FIG. 1, in accordance with an aspect of the present disclosure. To facilitate discussion, the sensor 14 and the liner assembly 16 are described with reference to a longitudinal axis or direction 50, a lateral axis or direction 52, and / or a vertical axis or direction 54. Further, the sensor 14 is described with reference to a first side 56 (e.g., bottom side, patient-facing side) and a second side 58 (e.g., top side; opposite the first side 56, such as opposite the first side 56 along the vertical axis 54 at least when in a flat configuration, such as prior to application to a patient).

[0042] The sensor 14 includes the sensor body 15, which includes a first bandage 60 (e.g., a top bandage) that couples to a second bandage 62 (e.g., a bottom bandage). The first bandage 60 and the second bandage 62 are coupled together via any suitable adhesive. The sensor body 15 houses or carries components of the sensor 14. For example, the sensor body 15 is providedaround the emitter 22 and / or the detector 24. A flexible circuit 64 positioned between the first bandage 60 and the second bandage 62 includes the emitter 22 and the detector 24 and may be coupled to the cable 21, which may connect various components (including the emitter 22 and the detector 24) of the sensor 14 to a connector 65 (e.g., plug).

[0043] The first bandage 60 includes a first adhesive 66 at a respective first surface (e.g., bottom surface) of the first bandage 60 to provide a first adhesive portion 68 (e.g., first zone or region, outer zone). In certain embodiments, the first adhesive 66 may include an acrylic-based adhesive (e.g., acrylic adhesive; adhesive that includes acrylic polymers). The first adhesive 66 may facilitate application and re-positioning on the patient. Further, the first bandage 60 includes a backing 70, a first light blocking layer 72 (e.g., metallized tape) coupled to the backing 70, and a tear prevention portion 74 (e.g., tear reinforcement portion) extending from or included as part of the first light blocking layer 72. The backing 70 may extend along the longitudinal axis 50 and the lateral axis 52 (e.g., at least in the flat configuration). In certain embodiments, the backing 70 may include porous material. The first light blocking layer 72 may be disposed underneath (e.g., below) the backing 70 and may be coupled to a respective first surface of the backing 70 via any suitable adhesive. The first light blocking layer 72 extends along the longitudinal axis 50 and the lateral axis 52 and obstructs (e.g., blocks, suppresses) light (e.g., blocks ambient light from reaching the detector 24).

[0044] The tear prevention portion 74 may extend along the lateral axis 52 and may include at least a portion of metallized tape. Further, the tear prevention portion 74 may be disposed in any suitable area of the first bandage 60. For example, as illustrated in FIG. 3, a first portion of the metallized tape may be placed along a first side (e.g., left side along the lateral axis 52) of the first light blocking layer 72 and the second portion of the metallized tape may be placed along a second side (e.g., right side along the lateral axis 52) of the first light blocking layer 72. It should be noted that the tear prevention portion may include any suitable material that provides reinforcement for the first bandage 60 to reduce or limit a risk of tear during coupling and uncoupling of the sensor 14 to the monitor 12, during separation or re-positioning of the sensor 14 on the patient, and so on.

[0045] Additionally, as described herein, a second light blocking layer (e.g., a metallized tape) forms the second bandage 62, which is disposed beneath the first bandage 60. The first bandage 60 and the second bandage 62 are coupled together by coupling the first light blocking layer 72 to the second bandage 62 to one another via any suitable adhesive, and with the flexible circuit64 positioned between the first bandage 60 and the second bandage 62. In certain embodiments, the second bandage 62 is the same size and shape (or similar in size and shape) as the first light blocking layer 72, and aligns or overlaps with the first light blocking layer 72. Additionally or alternatively, the second light blocking layer that forms the second bandage 62 obstructs or blocks light.

[0046] Moreover, a second adhesive 76 is applied to a respective first surface (e.g., bottom surface, surface closest to the patient, a patient-side surface, a patient-contacting surface, an exposed surface) of the second bandage 62 to provide a second adhesive portion 78 (e.g., second zone or region, inner zone). In certain embodiments, the second adhesive 76 may include a silicone-based adhesive, such as a silicone gel or a silicone pressure sensitive adhesive. The second adhesive 76 may facilitate adherence to the patient (e.g., to the skin and / or or nail of the patient) where the second adhesive portion 78 is in contact with the patient. The second adhesive 76 may be any suitable thickness that enables adhesion to the patient. For example, the thickness may be nay value between 0.1 millimeter (mm) and 1.5 mm.

[0047] Further, the second adhesive portion 78 may correspond to the first respective surface of the second bandage 62 that corresponds to the optical components (e.g., the emitter 22 and the detector 24). In particular, the second bandage 62 may include openings 79 aligned with the emitter 22 and the detector 24 (e.g., to enable the light emitted by the emitter 22 to reach the patient and enable the light to return from the patient to the detector 24), and the second adhesive portion 78 may be applied to the first respective surface of the second bandage 62 to extend between and circumferentially surround the openings 79). It should be appreciated that while the sensor 14 is described as including the first adhesive portion 68 with the first adhesive 66 and the second adhesive portion 78 with the second adhesive, the sensor 14 may include any suitable number of adhesive portions with any suitable number of adhesives.

[0048] Accordingly, when the liner assembly 16 is applied to the sensor 14, the first adhesive portion 68 with the first adhesive 66 and the second adhesive portion 78 with the second adhesive 76 are covered by the liner assembly 16 and are protected from environmental exposure by the liner assembly 16. However, when the liner assembly 16 is removed from the sensor 14, the first adhesive portion 68 with the first adhesive 66 and the second adhesive portion 78 with the second adhesive 76 are subject to environmental exposure at least when the sensor 14 is in the flat configuration and / or before application to the patient. In particular, the first adhesive portion 68 includes the first adhesive 66 exposed on an exposed portion of the respective first surface of thebacking 70 of the first bandage 60 (e.g., that does not overlap with or is not covered by the second bandage 62; the second bandage 62 only covers a portion of the first bandage 60), and the second adhesive portion 78 includes the second adhesive 76 exposed along the respective first surface of the second bandage 62. It should be appreciated that the first adhesive portion 68 with the first adhesive 66 at least partially surrounds and extends outwardly from (e.g., along the longitudinal axis 50 and the lateral axis 52) the second adhesive portion 78 with the second adhesive 76, which may effectively provide or form the outer adhesive zone and the inner adhesive zone.

[0049] It should be appreciated that the first light blocking layer 72 is coupled to the backing 70 via any suitable adhesive, such as the first adhesive 66. For example, during manufacturing, the first adhesive 66 may be applied across an entirety of the respective first surface of the backing 70, and then the first light blocking layer 72 may be coupled to the backing 70 via the first adhesive 66. Similarly, it should be appreciated that the first light blocking layer 72 is coupled to the second bandage 62 via any suitable adhesive, such as the first adhesive 66. For example, during manufacturing, the first adhesive 66 may be applied across an entirety of the respective first surface of the first light blocking layer 72 or the second bandage 62, and then the first light blocking layer 72 may be coupled to the second bandage 62 via the first adhesive 66.

[0050] The sensor 14 is supported on the liner assembly 16 prior to application to the patient (e.g., at manufacturing; for storage prior to application to the patient). Indeed, prior to use by the patient, the first adhesive 66 and the second adhesive 76 are coupled to the liner assembly 16. The liner assembly 16 may enable coverage of the first adhesive 66 and the second adhesive 76 to block (e.g., prevent) the first adhesive 66 and the second adhesive 76 from adhering (e.g., sticking) to other surfaces (e.g., unintended surfaces). That is, the liner assembly 16 may provide protection for the first adhesive 66 and the second adhesive 76 until the liner assembly 16 is peeled off (e.g., removed) to expose the first adhesive 66 and the second adhesive 76 for use to monitor the patient, for example. After the liner assembly 16 is peeled off, the sensor 14 may be applied to the patient, such as by adhering the sensor 14 to the patient with at least the second adhesive 76 (e.g., contacting tissue of the patient with the second adhesive 76), and then wrapping the first bandage 60 about the patient to adhere the first adhesive 66 to portions of the first bandage 60).

[0051] As described herein, the liner assembly 16 may include the first liner 18, the second liner20, a transfer adhesive 80, and a base 82 (e.g., film). The first liner 18, the second liner 20, thetransfer adhesive 80, and the base 82, may each extend along the longitudinal axis 50 and the lateral axis 52 (e.g., at least in the flat configuration). The first liner 18 and the second liner 20 are arranged (e.g., sized, shaped, positioned) to align with and cover the first adhesive portion 68 and the second adhesive portion 78 of the sensor 14. When the sensor 14 is assembled and / or in an initial configuration (e.g., the flat configuration), the first adhesive portion 68 and the second adhesive portion 78 are exposed along respective first surfaces of the first bandage 60 and the second bandage 62 of the sensor 14 (e.g., along the first side 56 of the sensor 14). Further, when the liner assembly 16 is coupled to the sensor 14 when the sensor 14 is assembled and / or in the initial configuration, the first adhesive 66 of the first adhesive portion 68 contacts and adheres to the first liner 18 of the liner assembly 16 and the second adhesive 76 of the second adhesive portion 78 contacts and adheres to the second liner 20 of the liner assembly 16.

[0052] When the liner assembly 16 is applied to the sensor 14, the first liner 18 may not cover or contact the second adhesive 76, and the second liner 20 may not cover or contact the first adhesive 66. It should be appreciated that the design may account for manufacturing limitations and / or tolerances, such that the first liner 18 may not cover or contact more than 1, 2, 3, 4, 5, 10, or 25 percent of the second adhesive 76, and / or the second liner 20 may not cover or contact more than 1, 2, 3, 4, 5, 10, or 25 percent of the first adhesive 66.

[0053] A respective first surface (e.g., bottom surface, non-release surface; that faces away from the sensor 14 when the liner assembly 16 is coupled to the sensor 14) of the first liner 18 and a respective first surface (e.g., bottom surface, non-release surface; that faces away from the sensor 14 when the liner assembly 16 is coupled to the sensor 14) of the second liner 20 may be coupled to the transfer adhesive 80 at a first transfer adhesive surface (e.g., top surface). Moreover, a second transfer adhesive surface (e.g., bottom surface, opposite the top surface) of the transfer adhesive 80 may be coupled to a first base surface (e.g., top surface) of the base 82. In this manner, the transfer adhesive 80 may provide an intermediate layer for attachment of the first liner 18 and the second liner 20 to the base 82. It should be appreciated that, in certain embodiments, each of the first liner 18 and the second liner 20 may be a distinct piece (e.g., film) that may be applied separately to the transfer adhesive.

[0054] Further, the first liner 18 and the second liner 20 may include respective second surfaces (e.g., top surfaces; release surfaces; face toward and contact the sensor 14 when the liner assembly 16 is coupled to the sensor 14). For example, the respective second surface of the first liner 18 may have the respective properties that correspond to and provide desirable protectionand release of the first adhesive 66, while the respective second surface of the second liner 20 may have the respective properties that correspond to and provide desirable protection and release of the second adhesive 76. When the liner assembly 16 is assembled, the respective second surface of the first liner 18 may at least partially surround and extend outwardly from (e.g., along the longitudinal axis 50 and the lateral axis 52) the respective second surface of the second liner 20, which may effectively provide or form an outer liner zone and an inner liner zone (e.g., to correspond to, align with, and / or cover the outer adhesive zone and the inner adhesive zone, respectively). The first liner 18 and the second liner 20 together provide a release surface (e.g., a complete release surface that extends across the respective second surface of the first liner 18 and the respective second surface of the second liner 20 of the liner assembly 16.

[0055] In certain embodiments, the respective second surface of the first liner 18 and the respective second surface of the second liner 20 may face a same direction (e.g., toward the sensor 14 while the liner assembly 16 is applied to the sensor 14), be flush with one another, and / or provide a unified or single planar surface. However, it should be appreciated that the first liner 18 and / or the second liner 20 may have a same or different thickness (e.g., along the vertical axis 54), and thus, the respective second surface of the first liner 18 and the respective second surface of the second liner 20 may face the same direction, but may not be flush with one another and / or may be offset along the vertical axis 54 (e.g., do not form the unified or single planar surface). For example, the first liner 18 may have a first thickness, and the second liner 20 may have a second thickness that is less than the first thickness to facilitate contact and engagement with the first adhesive 66 and the second adhesive 76, respectively (e.g., the first liner 18 protrudes or extends along the vertical axis 54 relative to the second liner 20).

[0056] In certain embodiments, the transfer adhesive 80 may be transparent (e.g., translucent) or opaque (e.g., dyed black) based on a calibration process for the sensor 14. The base 82 may include a polyethylene film base, which may provide a high surface energy for adherence to the transfer adhesive 80. In certain embodiments, the base 82 may also be transparent or opaque based on the calibration process for the sensor 14. For example, a layer of white material (e.g., film or ink) or black material (e.g., film or ink) may be incorporated into and / or applied to the base 82, such as applied to a second base surface (e.g., bottom surface, opposite the top surface) of the base 82 to cause the base 82 to be opaque and to provide either a white or black background for the calibration process. Additionally, it should be noted that the first liner 18 and the second liner 20 may each be either transparent or opaque, depending on the calibration process for the sensor 14.

[0057] As described herein, the first liner 18 may include properties that correspond to the first adhesive 66. For example, the first adhesive 66 may include the acrylic adhesive. Thus, the first liner 18 may include a silicone-coated liner to provide effective release properties from the acrylic adhesive, while reducing an amount of the acrylic adhesive that may remain stuck to the first liner 18 upon removal of the liner assembly 16 from the sensor 14. It should be noted that while the silicone-coated liner is described herein, the first liner 18 may include any suitable material that may provide effective release properties from the first adhesive 66.

[0058] In addition, the second liner 20 may include properties that correspond to the second adhesive 76. For example, the second adhesive 76 may include the silicone adhesive. Therefore, the second liner 20 may include a polyethylene-based liner to provide effective release properties from the silicone adhesive, while reducing an amount of the silicone adhesive that may remain stuck to the second liner 20 upon removal of the liner assembly 16 from the sensor 14. It should be noted that while the polyethylene-based liner is described herein, the second liner 20 may include any suitable material that may provide effective release properties from the second adhesive 76.

[0059] It should be noted that while the first liner 18 and the second liner 20 are described herein, the liner assembly 16 may include any suitable number of liners corresponding to any suitable number of types of adhesives. For example, the first bandage 60 may include a third adhesive at the respective first surface of the first bandage 60 to provide a third adhesive portion (e.g., corresponding to the tear prevention portion 74) at the first bandage 60. The third adhesive at the third adhesive portion may include a rubber-based adhesive (e.g., adhesive that includes rubber). Thus, the liner assembly 16 may include a third liner, which may include a polypropylene-based liner (e.g., material that includes polypropylene) to provide effective release properties from the rubber-based adhesive. Additional details regarding embodiments of the liner assembly 16 will be described below with respect to FIGS. 5-7.

[0060] With the foregoing in mind, FIG. 4 is a perspective exploded view of an embodiment of the liner assembly 16 and a calibration system 100, which may be employed at manufacturing and / or other suitable time (e.g., prior to removal of the liner assembly 16 from the sensor 14; prior to use of the sensor 14 to monitor the patient; to carry out a calibration process for the sensor 14, such as to determine a power ratio and / or other characteristics of the sensor 14). The sensor 14 may be designed to undergo the calibration process without the liner assembly 16 applied to the sensor 14 (e.g., prior to the liner assembly 16 being applied to the sensor 14).However, in certain embodiments, the sensor 14 may be designed to undergo the calibration process with the liner assembly 16 applied to the sensor 14. Advantageously, the liner assembly 16 may include features that enable completion of the calibration process for the sensor 14 while the liner assembly 16 is applied to the sensor 14.

[0061] The calibration system 100 may be coupled to the sensor 14 and may include a calibration structure, such as an integrating sphere or a calibration block (e.g., polymer block, such as polytetrafluoroethylene (PTFE) block, optical phantom, such as a three-dimensional model that mimics tissue optical properties). For example, the sensor 14 may be placed on and / or at an aperture of the calibration structure. The calibration system 100 may then instruct the emitter 22 (e.g., the red LED 28 and / or the IR LED 30) of the sensor 14 to emit light at one or more wavelengths (e.g., the red LED 28 to emit light at a first wavelength and the IR LED 30 to emit light at a second wavelength).

[0062] In certain embodiments, the calibration system 100 may receive a signal from the detector 24, wherein the signal is indicative of the one or more wavelengths of the light emitted by the emitter 22 received at the detector 24. In certain embodiments, the calibration system 100 may be coupled to a calibrated detector that may detect the one or more wavelengths of the light emitted by the emitter 22 and generate a signal indicative of the light. The calibration system 100 may then receive the signal (e.g., transmitted by the calibrated detector) indicative of the light detected by the calibrated detector. The calibration system 100 may then determine the characteristics, such as the power ratio, of the sensor 14 based on the signal(s). For example, the calibration system 100 may determine a first power (e.g., first intensity) at the first wavelength of the one or more wavelengths and a second power (e.g., second intensity) at the second wavelength of the one or more wavelengths. The calibration system 100 may then determine the power ratio by dividing the first power by the second power and transmit the power ratio to the sensor 14 for storage in the memory 42 of the sensor 14.

[0063] It should be noted that although the calibration process is described as being performed by the calibration system 100, in certain embodiments, certain steps or portions may be performed by the monitor 12 and / or the sensor 14. Indeed, the techniques could be performed (e.g., to determine the power ratio) and / or repeated (e.g., for verification of the power ratio) at other times (e.g., in clinical settings). In some such cases, at least some portions of these techniques may be performed by the calibration system 100 at the other times and / or by another system (e.g., the patient monitor 12 of FIG. 2).

[0064] As described herein, the liner assembly 16 may include the first liner 18, the second liner 20, one or more additional liners, the transfer adhesive 80, and / or the base 82. Further, as described herein, the first liner 18, the second liner 20, the one or more additional liners, the transfer adhesive 80, and the base 82 may respectively each be either transparent or opaque, depending on the calibration process performed by the calibration system 100 for the sensor 14. As an example, the first liner 18 may be opaque based on being outside the optical path of the optical components (e.g., the emitter 22 and / or the detector 24) of the sensor 14. Further, the second liner 20 may be opaque with one or more cutouts 102 or may be transparent without the one or more cutouts 102. However, any suitable variations or combinations of features are envisioned, such as the second liner 20 being transparent with the one or more cutouts 102 or the second liner 20 being opaque without the one or more cutouts 102.

[0065] When present, the one or more cutouts 102 may be positioned to correspond to and align with one or more of the optical components of the sensor 14 (e.g., the emitter 22, the detector 24, or both) and may enable the calibration system 100 to perform the calibration process of the sensor 14. For example, when present, the one or more cutouts 102 may enable the light from the emitter 22 to reach and be reflected toward the detector 24 by some opaque portion of the liner assembly 16, such as the transfer adhesive 80 and / or the base 82 that is opaque and has a particular color (e.g., opaque and white), as part of the calibration process for the sensor 14.Such design and construction features enable opacity and color to be implemented via the transfer adhesive 80 and / or the base, and then the liners may be selected and utilized in the liner assembly 16 regardless of transparency, opacity, color, and so forth of the liners, which may provide for efficient and / or cost effective product supply and manufacturing, for example. However, as noted herein, the second liner 20 may also be designed to be opaque and have a particular color (e.g., opaque and white) to enable the light from the emitter 22 to reach and be reflected toward the detector 24 by the second liner 20 as part of the calibration process for the sensor 14.

[0066] In certain embodiments, a first portion of the second liner 20 may be transparent and a second portion of the second liner 20 may be opaque. For example, the second portion may correspond to a region that circumferentially surrounds and / or is in between the emitter 22 and the detector 24 of the sensor 14. It should be noted that the second liner 20, the first liner 18, the one or more additional liners, the transfer adhesive 80, and / or the base 82 may include varying portions of transparent material and opaque material, as well as any suitable color, depending on the calibration process for the sensor 14.

[0067] In certain embodiments, the second liner 20 may include a white material (e.g., film or ink). For example, if the calibration structure of the calibration system 100 includes the integrating sphere, then the white material may enable the second liner 20 to reflect light back into the integrating sphere during the calibration process. In this manner, the second liner 20 may act or function as an additional reflecting wall of the integrating sphere to facilitate delivery of the light (e.g., all or almost all light) emitted by the emitter 22 to the calibrated detector of the calibration system 100.

[0068] While the liner assembly 16 is described herein with respect to the sensor 14 to facilitate discussion, the liner assembly 16 may be employed for any suitable object that includes adhesives (e.g., different types of adhesives). For example, the liner assembly 16 may be employed with any suitable object, such as other medical devices, wound dressings, dermal patches, tape, labels, shipping and mailing products, household products, decorative objects, art supplies, infant care products, toys, industrial equipment, and so forth. As described herein, the liner assembly 16 may include any suitable number of liners that correspond to any suitable number of adhesives (e.g., types of adhesives) at different regions of the object. The liners may each be any suitable shape and / or size and may each be disposed at a region corresponding to its type of adhesive. In this way, the liner assembly 16 may be designed with the multiple liners to fit or match adhesives of the object, rather than having the adhesives of the object designed to fit or match a single liner or having the adhesives of the object be incompatible with or negatively impacted (e.g., avoidable loss of tack) by use of the single liner. Thus, the liner assembly 16 may provide a customized paper-based or a plastic-based structure with the liners that act as a carrier for the adhesives of the object so that the object can be packaged, transported, and / or stored without loss of function of the adhesives of the object.

[0069] With the foregoing in mind, FIG. 5 is atop view of an embodiment of a liner assembly 120 that includes a first liner 122 (e.g., first liner portion) that provides a liner for a first adhesive (e.g., first adhesive type) of an object and a second liner 124 (e.g., second liner portion) that provides a liner for a second adhesive (e.g., second adhesive type different from the first adhesive type) of the object. The first liner 122 may include respective properties that correspond to the first adhesive and the second liner 124 may include respective properties that correspond to the second adhesive. Moreover, the first liner 122 may be disposed at a first region of a release surface (e.g., top surface; face toward and contact the object when the liner assembly 120 is coupled to the object) of the liner assembly 120. Additionally, the second liner 124 may be disposed at a second region of the release surface of the liner assembly 120.

[0070] As illustrated in FIG. 5, a surface area of the first liner 122 may cover a larger surface area of the liner assembly 120 compared to a surface area of the second liner 124 based on the first adhesive and the second adhesive of the object. For example, the first adhesive may occupy a larger surface area (e.g., space) of the object compared to the second adhesive. Therefore, as illustrated in FIG. 5, the first liner 122 may also occupy the larger surface area of the liner assembly 120 (e.g., to align with and cover the first adhesive) compared to the second liner 124.

[0071] It should be appreciated that the first liner 122 and the second liner 124 may each be disposed at any suitable region of the release surface of the liner assembly. For example, while the second liner 124 is illustrated as being disposed along or close to a lateral side, such as at a left side of the liner assembly 120 (e.g., not contacting an edge of the liner assembly 120), the second liner 124 may be disposed in any suitable location. As an example, the second liner 124 may be disposed in the middle of the liner assembly 120, the right side of the liner assembly 120, at or contacting a left edge of the liner assembly 120, at or contacting a right edge of the liner assembly 120, at or contacting any edge of the liner assembly 120. Further, it should be noted that the first liner 122 and the second liner 124 may be any suitable size (e.g., absolute size and relative size) and shape (e.g., cross-sectional shape; in the top view, such as circular, oval, square, complex with curved and / or straight edges).

[0072] FIG. 6 is a top view of an embodiment of a liner assembly 140 including a first liner 142 (e.g., first liner portion) that provides a liner for a first adhesive (e.g., first adhesive type) of an object and a second liner 144 (e.g., second liner portion) that provides a liner for a second adhesive (e.g., second adhesive type different from the first adhesive type) of the object. The first liner 142 may include respective properties that correspond to the first adhesive and the second liner 144 may include respective properties that correspond to the second adhesive. As described herein, the first liner 142 and the second liner 144 may be disposed at a release surface (e.g., top surface; face toward and contact the object when the liner assembly 120 is coupled to the object) of the liner assembly 140.

[0073] Additionally, as described herein the first liner 142 and the second liner 144 may be any suitable size and shape. For example, as illustrated in FIG. 6, a surface area of the second liner 144 may cover a larger surface area of the liner assembly 140 compared to a surface area of the first liner 142. For example, the second adhesive may occupy a larger surface area of the object compared to the first adhesive. Therefore, as illustrated in FIG. 6, the second liner 124 may alsooccupy the larger surface area of the liner assembly 140 (e.g., to align with and cover the second adhesive) compared to the first liner 142.

[0074] With the foregoing in mind, FIG. 7 is atop view of an embodiment of a liner assembly 160 including a first liner 162 (e.g., first liner portion) that provides a liner for a first adhesive (e.g., first adhesive type) of an object, a second liner 164 (e.g., second liner portion) that provides a liner for a second adhesive (e.g., second adhesive type different from the first adhesive type) of the object, and a third liner 166 (e.g., third liner portion) that provides a liner for a third adhesive (e.g., third adhesive type different from the first adhesive type and the second adhesive type).

[0075] The first liner 162 may include respective properties that correspond to the first adhesive, the second liner 164 may include respective properties that correspond to the second adhesive, and the third liner 166 may include respective properties that correspond to the third adhesive. As such, the first liner 162, the second liner 164, and the third liner 166 may correspond to the first adhesive, the second adhesive, and the third adhesive at different regions of the object. Indeed, the first liner 162, the second liner 164, and the third liner 166 may be disposed at regions of a release surface of the liner assembly 160 corresponding to the first adhesive, the second adhesive, and the third adhesive. In this way, the liner assembly 160 may be designed with the multiple liners to fit or match adhesives of the object, rather than having the adhesives of the object designed to fit or match a single liner or having the adhesives of the object be incompatible with or negatively impacted (e.g., avoidable loss of tack) by use of the single liner. Additionally, as described herein the first liner 162, the second liner 164, and the third liner 166 may be any suitable size and shape. Further, any suitable number (e.g., 1, 2, 3, 4, 5, 6, or more) of liners may be provided to provide the release surface of the liner assembly 160 to correspond to a number (e.g., 1, 2, 3, 4, 5, 6, or more) adhesives of the object.

[0076] While the disclosure may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and have been described in detail herein. However, it should be understood that the embodiments provided herein are not intended to be limited to the particular forms disclosed. Rather, the various embodiments may cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure as defined by the following appended claims.

[0077] The invention may be further described by reference to the following examples:

[0078] Example 1: A liner assembly, including: a first liner including a first material; a second liner including a second material; a transfer adhesive, wherein the first liner and the second liner are coupled to a respective first surface of the transfer adhesive; and a base, wherein a respective second surface of the transfer adhesive is coupled to a respective first surface of the base.

[0079] Example 2: The liner assembly according to example 1, wherein the first material corresponds to a first adhesive type, and wherein the second material corresponds to a second adhesive type.

[0080] Example 3: The liner assembly according to example 2, wherein the first material is different from the second material, and wherein the first adhesive type is different from the second adhesive type.

[0081] Example 4: The liner assembly according to any of examples 1 to 3, wherein the first liner is disposed at a first region of a release surface of the liner assembly, and wherein the second liner is disposed at a second region of the release surface of the liner assembly.

[0082] Example 5: The liner assembly according to any of examples 1 to 4, wherein the first liner is configured to provide coverage for a first adhesive of an object and the second liner is configured to provide coverage for a second adhesive of the object.

[0083] Example 6: The liner assembly according to example 5, wherein the object includes a sensor.

[0084] Example 7: The liner assembly according to any of examples 1 to 6, wherein the first liner, the second liner, the transfer adhesive, the base, or any combination thereof include a transparent material.

[0085] Example 8: The liner assembly according to any of examples 1 to 7, wherein the first material includes silicone, and wherein the second material includes polyethylene.

[0086] Example 9: The liner assembly according to any of examples 1 to 8, wherein the first material is configured to cover an acrylic adhesive, and wherein the second material is configured to cover a silicone adhesive.

[0087] Example 10: An assembly, including: a first liner including a first material and configured to provide a first cover for a first adhesive of a bandage of a sensor; a second liner including a second material and configured to provide a second cover for a second adhesive of the bandage of the sensor; and a transfer adhesive on a base, wherein the first liner and the second liner are coupled to a respective first surface of the transfer adhesive.

[0088] Example 11 : The assembly according to example 10, wherein the first material has corresponding properties to the first adhesive, the second material has corresponding properties to the second adhesive, the first material is different from the second material, and the first adhesive is different from the second adhesive.

[0089] Example 12: The assembly according to example 11, including the sensor, wherein the sensor is configured to adhere to skin of a patient via at least the second adhesive.

[0090] Example 13: The assembly according to any of examples 10 to 12, wherein the first liner, the second liner, the transfer adhesive, the base, or any combination thereof include a transparent material or an opaque material based on a calibration process of the sensor.

[0091] Example 14: The assembly according to any of examples 10 to 13, wherein the second liner includes one or more cutouts that align with at least one of an emitter of the sensor or a detector of the sensor.

[0092] Example 15: The assembly according to any of examples 10 to 14, wherein the first liner forms an outer liner zone of a release surface of the assembly and the second liner forms an inner liner zone of the release surface of the assembly.

[0093] Example 16: The assembly according to any of examples 10 to 15, wherein the base includes a layer of white material or black material to provide a white background or a black background during a calibration process of the sensor.

[0094] Example 17: The assembly according to any of examples 10 to 16, wherein the first liner forms an outer liner zone of a release surface of the assembly and the second liner forms an inner liner zone of the release surface of the assembly.

[0095] Example 18: The assembly according to any of examples 10 to 17, including a third liner including a third material and configured to provide a third cover for a third adhesive portion of the sensor, wherein the third adhesive portion corresponds to a tear prevention portion of the sensor.

[0096] Example 19: A method of manufacture of an assembly, the method including: coupling a first liner including first properties to a base via a transfer adhesive; coupling a second liner including second properties to the base via the transfer adhesive to provide a liner assembly with a release surface formed by the first liner and the second liner; and coupling the liner assembly to a sensor via the release surface of the liner assembly.

[0097] Example 20: The method according to example 19, wherein the first properties correspond to a first adhesive of the sensor and the second properties correspond to a second adhesive of the sensor.

[0098] Example 21: The method according to any of examples 19 to 20, including selecting the first liner, the second liner, the transfer adhesive, the base, or any combination thereof to be a transparent material or an opaque material based on a calibration process of the sensor.

[0099] Example 22: The method according to any of examples 19 to 21, including aligning one or more cutouts of the second liner with at least one of an emitter of the sensor or a detector of the sensor.

[0100] Example 23: The method according to any of examples 19 to 22, including coupling the first liner to the base via the transfer adhesive to form an outer liner zone of the release surface of the liner assembly, and coupling the second liner to the base via the transfer adhesive to form an inner liner zone of the release surface of the liner assembly.

[0101] Example 24: The method according to any of examples 19 to 23, including coupling a third liner having third properties to the base via the transfer adhesive to provide the liner assembly with the release surface formed by the first liner, the second liner, and the third liner.

Claims

CLAIMS1. A liner assembly (16), comprising: a first liner (18) comprising a first material; a second liner (20) comprising a second material; a transfer adhesive (80), wherein the first liner (18) and the second liner (20) are coupled to a respective first surface of the transfer adhesive (80); and a base (82), wherein a respective second surface of the transfer adhesive (80) is coupled to a respective first surface of the base (82).

2. The liner assembly (16) according to claim 1, wherein the first material corresponds to a first adhesive type, and wherein the second material corresponds to a second adhesive type.

3. The liner assembly (16) according to claim 2, wherein the first material is different from the second material, and wherein the first adhesive type is different from the second adhesive type.

4. The liner assembly (16) according to any of claims 1 to 3, wherein the first liner (18) is disposed at a first region of a release surface of the liner assembly (16), and wherein the second liner (20) is disposed at a second region of the release surface of the liner assembly (16).

5. The liner assembly (16) according to any of claims 1 to 4, wherein the first liner (18) is configured to provide coverage for a first adhesive (66) of an object and the second liner (20) is configured to provide coverage for a second adhesive (76) of the object.

6. The liner assembly (16) according to claim 5, wherein the object comprises a sensor (14).

7. The liner assembly (16) according to any of claims 1 to 6, wherein the first liner (18), the second liner (20), the transfer adhesive (80), the base (82), or any combination thereof comprise a transparent material.

8. The liner assembly (16) according to any of claims 1 to 7, wherein the first material comprises silicone, and wherein the second material comprises polyethylene.

9. The liner assembly (16) according to claim 8, wherein the first material is configured to cover an acrylic adhesive, and wherein the second material is configured to cover a silicone adhesive.

10. A method of manufacture of an assembly, the method comprising: coupling a first liner (18) comprising first properties to a base (82) via a transfer adhesive (80); coupling a second liner (20) comprising second properties to the base (82) via the transfer adhesive (80) to provide a liner assembly (16) with a release surface formed by the first liner (18) and the second liner (20); and coupling the liner assembly (16) to a sensor (14) via the release surface of the liner assembly (16).

11. The method according to claim 10, wherein the first properties correspond to a first adhesive (66) of the sensor (14) and the second properties correspond to a second adhesive (76) of the sensor (14).

12. The method according to any of claims 10 to 11 , comprising selecting the first liner (18), the second liner (20), the transfer adhesive (80), the base (82), or any combination thereof to be a transparent material or an opaque material based on a calibration process of the sensor (14).

13. The method according to any of claims 10 to 12, comprising aligning one or more cutouts (102) of the second liner (20) with at least one of an emitter (22) of the sensor (14) or a detector (24) of the sensor (14).

14. The method according to any of claims 10 to 13, comprising coupling the first liner (18) to the base (82) via the transfer adhesive (80) to form an outer liner zone of the release surface of the liner assembly (16), and coupling the second liner (20) to the base (82) via the transfer adhesive (80) to form an inner liner zone of the release surface of the liner assembly (16).

15. The method according to any of claims 10 to 14, comprising coupling a third liner comprising third properties to the base (82) via the transfer adhesive 80 to provide the liner assembly (16) with the release surface formed by the first liner (18), the second liner (20), and the third liner.

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