Medical sensor and sensor support

Abstract

To enhance convenience of a medical sensor which uses a support to attach a light-emitting device and a light receiving device to the body of a subject.SOLUTION: A support 14 to attach to the body of a subject comprises a first support part 141, a second support part 142, and a third support part 143. The first support part 141 covers and supports a light-emitting device 11. The second support part 142 covers and supports a light-receiving device 12. The third support part 143 is located between the first support part 141 and the second support part 142. At least one of the first support part 141, the second support part 142 and the third support part 143 is more flexible than adjacent portions.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a medical sensor including a light-emitting element that emits light and a light-receiving element that outputs a signal corresponding to the amount of incident light. The present disclosure also relates to a sensor support for attaching the medical sensor to the body of a subject. [Background technology]

[0002] Patent Document 1 discloses, as an example of a medical sensor, a sensor worn on the fingertip of a subject to calculate the subject's percutaneous arterial oxygen saturation (SpO2). The sensor includes a light-emitting element and a light-receiving element. The light-emitting element emits light toward the tissue of the fingertip. The light that passes through the tissue is incident on the light-receiving element. The light-receiving element outputs a signal according to the intensity of the received light. The sensor includes a support that is wrapped around the fingertip. The support supports the light-emitting element and the light-receiving element. The signal output from the light-receiving element is transmitted via a cable to a device that calculates SpO2. [Prior art documents] [Non-patent literature]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-150996 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for improving the convenience of medical sensors in which a light emitting element and a light receiving element are attached to the body of a subject using a support. [Means for solving the problem]

[0005] A first example aspect that can be provided by the present disclosure is a medical sensor, comprising: A light emitting element that emits light; a light receiving element that outputs a signal corresponding to the amount of incident light; A support attached to the subject's body; It is equipped with The support is a first support portion that covers and supports the light emitting element; a second support portion that covers and supports the light receiving element; a third support portion located between the first support portion and the second support portion; It contains At least one of the first support portion, the second support portion, and the third support portion has a higher flexibility than an adjacent portion.

[0006] A second example embodiment that can be provided by the present disclosure is a sensor support for attaching a medical sensor to a body of a subject, the medical sensor including a light-emitting element that emits light and a light-receiving element that outputs a signal corresponding to the amount of incident light, the sensor support comprising: a first support portion configured to cover and support the light emitting element; a second support portion configured to cover and support the light receiving element; a third support portion located between the first support portion and the second support portion; It is equipped with At least one of the first support portion, the second support portion, and the third support portion has a higher flexibility than an adjacent portion.

[0007] The first support portion is a portion that supports the light-emitting element while covering it. According to the configurations of the first and second aspects, the extension of the first support portion is promoted by covering the light-emitting element, and it is possible to suppress the generation of stress in the support and the displacement of the light-emitting element due to the stress.

[0008] The second support portion is a portion that covers and supports the light receiving element. According to the configurations of the first and second aspects, the extension of the second support portion is promoted by covering the light receiving element, and it is possible to suppress the generation of stress in the support and the positional displacement of the light emitting element due to the stress.

[0009] The third support portion is a portion used for bending to position the light-emitting element and the light-receiving element opposite each other. According to the configurations of the first and second embodiments, not only can the support be bent with less force, but the bent state can be maintained more easily. This makes it possible to prevent misalignment of the light-emitting element and the light-receiving element after the medical sensor is fixed to the subject's body.

[0010] Therefore, the convenience of the medical sensor in which the light emitting element and the light receiving element are attached to the body of the subject using the support can be improved.

[0011] A third example aspect that can be provided by the present disclosure is a medical sensor, comprising: A light emitting element that emits light; a light receiving element that outputs a signal corresponding to the amount of incident light; a support body that supports the light emitting element and the light receiving element and is attached to the body of the subject; It is equipped with The support is a first adhesive surface adapted to be adhered to the body; a first fixed portion; a second fixing part having a second adhesive surface that covers a surface of the first fixing part and is adhered to the surface; It contains At least one portion of the surface has a lower adhesive potential than an adjacent portion.

[0012] A fourth example aspect that can be provided by the present disclosure is a sensor support for attaching a medical sensor to a body of a subject, the medical sensor including a light-emitting element that emits light and a light-receiving element that outputs a signal corresponding to an amount of incident light, the sensor support comprising: a first fixing portion having a first adhesive surface that is adhered to the body; a second fixing portion having a second adhesive surface that covers and is adhered to a surface of the first fixing portion; It contains At least one portion of the surface has a lower adhesive potential than an adjacent portion.

[0013] When the medical sensor is fixed to the body of a subject, the second adhesive surface is adhered to the surface of the first fixing part. By forming a portion on the surface that is less likely to adhere, the likelihood of the second fixing part being detached from the first fixing part can be increased. This makes it easier to reattach the sensor to optimize the arrangement of the light-emitting element and the light-receiving element, for example. Therefore, the convenience of the medical sensor, in which the light-emitting element and the light-receiving element are attached to the body of a subject using a support, can be improved. [Brief explanation of the drawings]

[0014] [Figure 1] 1 illustrates an external view of the front side of a sensor according to an example embodiment. [Figure 2] 2 illustrates an example of the appearance of the rear side of the sensor in FIG. 1. [Figure 3] 2 illustrates a method for attaching the sensor of FIG. 1 to a subject's finger. [Figure 4] 2 illustrates a method for attaching the sensor of FIG. 1 to a subject's finger. [Figure 5] 2 illustrates a method for attaching the sensor of FIG. 1 to a subject's finger. [Figure 6] 2 shows an example of a cross-sectional structure of a support in region VI shown in FIG. [Figure 7] 1. FIG. 4 shows another example of the cross-sectional structure of the support in region VI shown in FIG. [Figure 8] 10 illustrates an external view of the front side of a sensor according to another configuration example. [Figure 9] 9 shows an example of a cross-sectional structure of the support in region IX shown in FIG. 8. [Figure 10] 9 shows another example of the cross-sectional structure of the support in the region IX shown in FIG. 8. [Figure 11] 10 illustrates an external view of a sensor according to another configuration example. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The following detailed description of exemplary embodiments will be given with reference to the accompanying drawings, in which the scale of each illustrated element is appropriately changed so as to make it recognizable.

[0016] FIG. 1 shows the appearance of a sensor 10 according to one embodiment. The sensor 10 is attached to the fingertip of a subject to calculate the concentration of a light absorber in the blood. The sensor 10 is an example of a medical sensor. The fingertip is an example of the subject's body. An example of the concentration of a light absorber in the blood is transcutaneous arterial oxygen saturation (SpO2).

[0017] The sensor 10 includes a light-emitting element 11. The light-emitting element 11 is a semiconductor light-emitting element that emits light containing a predetermined wavelength. Examples of the semiconductor light-emitting element include a light-emitting diode and a laser diode. The number of light-emitting elements 11 and the wavelength value are determined appropriately depending on the type of blood light-absorbing substance concentration to be acquired.

[0018] The sensor 10 includes a light receiving element 12. The light receiving element 12 outputs a detection signal according to the amount of light received on its light receiving surface. Examples of the light receiving element 12 include a photodiode, a phototransistor, and a photoresistor.

[0019] The sensor 10 includes a cable 13. The sensor 10 is connected to a pulse photometer (not shown) via the cable 13. The cable 13 houses a power supply line, a control signal line, and a detection signal line.

[0020] The power supply line and the control signal line are connected to a drive circuit (not shown) that is connected to the light-emitting element 11. The power supply line supplies power from the pulse photometer to the drive circuit. The control signal line supplies a control signal sent from the pulse photometer to the drive circuit for controlling the turning on and off of the light-emitting element 11.

[0021] The power supply line is also connected to the light receiving element 12. Therefore, power from the pulse photometer is also supplied to the light receiving element 12 via the power supply line. The detection signal line electrically connects the light receiving element 12 and the pulse photometer. Therefore, the detection signal output from the light receiving element 12 is sent to the pulse photometer and subjected to appropriate processing.

[0022] The sensor 10 includes a support 14. Figure 1 illustrates the front side of the support 14. Figure 2 illustrates the rear side of the support 14.

[0023] 1, the light-emitting element 11 includes a first support portion 141, a second support portion 142, and a third support portion 143. The first support portion 141 covers and supports the light-emitting element 11. The second support portion 142 covers and supports the light-receiving element 12. The third support portion 143 is located between the first support portion 141 and the second support portion 142.

[0024] In the initial state, the back side of the support 14 is covered with a peelable sheet (not shown). When the user peels off the sheet to use the sensor 10, the adhesive surface 144, as shown in Fig. 2, is exposed. The adhesive surface 144 is adhesive.

[0025] The adhesive surface 144 includes a first light-transmitting portion 144a and a second light-transmitting portion 144b. The first light-transmitting portion 144a is disposed so as to face the light-emitting element 11. The second light-transmitting portion 144b is disposed so as to face the light-receiving element 12.

[0026] Each of the first light transmitting portion 144 a and the second light transmitting portion 144 b is made of a material that is transparent to the wavelength of the light emitted from the light emitting element 11 .

[0027] A method for attaching the sensor 10 to the subject's finger F will be described with reference to FIGS.

[0028] 3, in a state where the adhesive surface 144 of the support body 14 is exposed by peeling off the sheet on the rear side, the first support part 141 is arranged to face the nail side of the finger F. The adhesive surface 144 located on the rear side of the first support part 141 is adhered to the nail side of the finger F.

[0029] 1, the support body 14 includes a first fixing portion 145. The first fixing portion 145 extends to the left and right of the first support portion 141. As illustrated in FIG. 2, the adhesive surface 144 includes a first adhesive surface 144c. The first adhesive surface 144c is located on the back side of the first fixing portion 145.

[0030] 3, the first fixing portion 145 is wrapped around the finger F. As a result, the first adhesive surface 144c is adhered to the finger F.

[0031] Next, by bending the support body 14 while making the third support portion 143 face the tip of the finger F, the second support portion 142 is arranged to face the pad side of the finger F. The adhesive surface 144 located on the back side of the third support portion 143 is adhered to the tip of the finger F. The adhesive surface 144 located on the back side of the second support portion 142 is adhered to the pad side of the finger F.

[0032] 1, the support body 14 includes a second fixing portion 146. The second fixing portion 146 extends to the left and right of the second support portion 142. As illustrated in FIG. 2, the adhesive surface 144 includes a second adhesive surface 144d. The second adhesive surface 144d is located on the back side of the second fixing portion 146.

[0033] 4 and 5, second fixing portion 146 is wrapped around a portion of support 14 that includes first fixing portion 145. Second adhesive surface 144d is adhered to the surface of first fixing portion 145 while covering the surface. This completes the fixation of sensor 10 to finger F.

[0034] In this state, the light-emitting element 11 and the light-receiving element 12 are arranged to face each other with the finger F interposed therebetween. Light emitted from the light-emitting element 11 passes through the first light-transmitting portion 144a of the support body 14 and is incident on the tissue of the finger F. The light that has passed through the tissue passes through the second light-transmitting portion 144b of the support body 14 and is incident on the light-receiving surface of the light-receiving element 12. The pulse oximeter performs processing to calculate the concentration of a light-absorbent substance in the arterial blood contained in the tissue, based on the detection signal output from the light-receiving element 12.

[0035] 6 illustrates a cross-sectional configuration of the support 14 corresponding to region VI shown in FIG. 1. The support 14 includes a first substrate 147a and a second substrate 147b. The first substrate 147a is located on the front side of the support 14. The second substrate 147b is located on the back side of the support 14 and forms an adhesive surface 144. The light receiving element 12 is supported between the first substrate 147a and the second substrate 147b. Although not shown in the figure, the light emitting element 11 is also supported between the first substrate 147a and the second substrate 147b.

[0036] The support 14 includes a first surface treatment layer 148. The first surface treatment layer 148 has physical properties different from those of the first base material 147a. In this embodiment, the first base material 147a and the first surface treatment layer 148 have different surface smoothness. In other words, the surface smoothness is an example of a physical property.

[0037] The term "surface treatment" as used herein includes any treatment that can add a layer having different physical properties to the first substrate 147a, such as printing, coating, or bonding a film member.

[0038] In this embodiment, the first surface processing layer 148 is not formed on the third support portion 143. In other words, the surface of the first base material 147a is exposed in the third support portion 143. As a result, the third support portion 143 has lower rigidity than the adjacent portion on which the first surface processing layer 148 is formed. In other words, the third support portion 143 has higher flexibility than the adjacent portion.

[0039] As illustrated in FIG. 3 , the third support portion 143 is a portion that is used for bending at the tip of the subject's finger F. With the above-described configuration, not only can the support body 14 be bent with less force, but the bent state is more likely to be maintained. This can suppress misalignment of the light-emitting element 11 and the light-receiving element 12 after the sensor 10 is fixed to the finger F. Therefore, the convenience of the sensor 10, in which the light-emitting element 11 and the light-receiving element 12 are attached to the finger F using the support body 14, can be improved.

[0040] The localized improvement in flexibility of the third support portion 143 is achieved by intentionally locally omitting the first surface processing layer 148, which is generally formed uniformly on the surface of the first base material 147a to impart desired physical properties. Therefore, the above-mentioned effects can be obtained while reducing the cost associated with forming the first surface processing layer 148.

[0041] However, it is not necessary to expose the surface of the first base material 147a in the third support portion 143. As illustrated in Fig. 7, the first surface treatment layer 148 may be formed so as to also cover the third support portion 143. In this case, by additionally providing the first surface treatment layer 148 in a portion adjacent to the third support portion 143, the flexibility of the third support portion 143 may be relatively increased.

[0042] 1, the first fixing portion 145 includes a low-adhesion portion 145a, which has a lower adhesive potential than adjacent portions.

[0043] As described with reference to Figures 4 and 5, when fixing sensor 10 to finger F, second adhesive surface 144d located on the back side of second fixing portion 146 is adhered to the surface of first fixing portion 145. By forming a portion with low adhesiveness on that surface, it is possible to increase the likelihood that second fixing portion 146 will peel off from first fixing portion 145. This makes it easier to reattach sensor 10 in order to optimize the arrangement of light-emitting element 11 and light-receiving element 12, for example. Therefore, it is possible to improve the convenience of sensor 10, in which light-emitting element 11 and light-receiving element 12 are attached to finger F using support body 14.

[0044] In this embodiment, similar to the case of the third support part 143 described with reference to Fig. 6, the low-adhesion part 145a is formed by locally omitting the formation of the first surface processing layer 148. In other words, the less smooth surface of the first base material 147a is exposed, thereby relatively reducing the adhesiveness.

[0045] The low-adhesion portion 145a is realized by intentionally locally omitting the first surface treatment layer 148, which is generally formed uniformly on the surface of the first base material 147a to impart desired physical properties. Therefore, the above-mentioned effects can be obtained while reducing the cost associated with forming the first surface treatment layer 148.

[0046] However, it is not necessary to expose the surface of the first substrate 147a to form the low-adhesion portion 145a. The adhesiveness of a portion of the uniformly formed first surface treatment layer 148 may be relatively reduced by roughening that portion. Examples of roughening include printing, coating, and adhesion of a film member.

[0047] As an example, first substrate 147a may be made of nonwoven fabric. In this case, first surface treatment layer 148 may be formed to improve the surface smoothness, thereby improving the adhesiveness of portions other than low-adhesion portion 145a and suppressing fuzzing on the surface of the nonwoven fabric. In order to prevent a decrease in surface smoothness, woven fabric, film material, foam material, or the like may be used as first substrate 147a.

[0048] 1, information for assisting in attaching the sensor 10 to the finger F is displayed on the front side of the support 14. The information includes information indicating the position of the light-emitting element 11, information indicating the position of the light-receiving element 12, information indicating a guide for the position where the finger F should be placed, and the like.

[0049] 6, the information is formed by the second surface processing layer 149. The second surface processing layer 149 can be formed on at least one of the surface of the first base material 147a and the surface of the first surface processing layer 148.

[0050] According to such a configuration, the convenience of attaching the sensor 10 to the finger F can be improved while ensuring the advantages of high flexibility and low adhesiveness described above.

[0051] In this embodiment, the surface of the first surface treatment layer 148 is formed to have a different appearance from the surface of the first base material 147a. As a result, the third support portion 143 and the low-adhesion portion 145a, on which the first surface treatment layer 148 is not formed, have a different appearance from the rest of the support 14.

[0052] According to such a configuration, the above-mentioned advantageous features can be emphasized to the user, thereby improving the marketability of the sensor 10.

[0053] The difference in appearance between the first base material 147a and the first surface treatment layer 148 does not necessarily have to be achieved by the difference in materials forming each element, but may be achieved by the difference in color, pattern, or the like.

[0054] Fig. 8 shows another example of the configuration of the sensor 10. Fig. 9 shows an example of the cross-sectional configuration of the support body 14 corresponding to region IX shown in Fig. 8. In this example, the flexibility of each of the first support portion 141 and the second support portion 142 of the support body 14 is higher than that of the adjacent portions.

[0055] Specifically, the first surface processing layer 148 is not formed on the first support portion 141 and the second support portion 142 (the first support portion 141 is not shown). As a result, each of the first support portion 141 and the second support portion 142 has lower rigidity than the adjacent portion where the first surface processing layer 148 is formed.

[0056] The first support portion 141 and the second support portion 142 are portions that cover and support the light emitting element 11 and the light receiving element 12, respectively. With the above-described configuration, the extension of the first base material 147a is promoted by covering the light emitting element 11 and the light receiving element 12, and it is possible to suppress the generation of stress and the resulting positional deviation of the light emitting element 11 and the light receiving element 12. Therefore, it is possible to improve the convenience of the sensor 10 in which the light emitting element 11 and the light receiving element 12 are attached to the finger F using the support member 14.

[0057] The localized improvement in flexibility of the first support portion 141 and the second support portion 142 is achieved by intentionally locally omitting the first surface treatment layer 148, which is generally formed uniformly on the surface of the first base material 147a to impart desired physical properties. Therefore, the above-mentioned effects can be obtained while reducing the cost associated with forming the first surface treatment layer 148.

[0058] However, it is not necessary to expose the surface of the first base material 147a in the first support portion 141 and the second support portion 142. As illustrated in Fig. 10, the first surface treatment layer 148 may be formed so as to cover the second support portion 142 as well (similarly to the first support portion 141). In this case, by additionally providing the first surface treatment layer 148 in portions adjacent to each of the first support portion 141 and the second support portion 142, the flexibility of the first support portion 141 and the second support portion 142 may be relatively increased.

[0059] The configurations described above are merely examples for facilitating understanding of the present disclosure. Each configuration example may be appropriately modified or combined with other configuration examples without departing from the spirit of the present disclosure.

[0060] The portion of the support 14 that is more flexible than the adjacent portions may be at least one of the first support portion 141, the second support portion 142, and the third support portion 143, depending on the specifications of the sensor 10.

[0061] 1, the support 14 according to the above embodiment has a shape that is symmetrical with respect to the line L that connects the light emitting element 11 and the light receiving element 12. This configuration can improve the stability of the support 14 when worn on the subject's finger F.

[0062] 11, the support 14 may be in the form of a belt with the light-emitting element 11 supported at one end. In this example, the sensor 10 is fixed to the subject's finger by wrapping the support 14 around the finger. The light-receiving element 12 is supported in a position facing the light-emitting element 11, sandwiching the finger when the support 14 is wrapped around the finger.

[0063] The application of the medical sensor to which the concept of the present disclosure is applied is not limited to detecting the concentration of a light-absorbing substance in blood, and the concept of the present disclosure can be applied to any medical sensor that optically detects a biological parameter by appropriately modifying the shape.

[0064] The configurations listed below also form part of this disclosure. Item 1: A light emitting element that emits light; a light receiving element that outputs a signal corresponding to the amount of incident light; A support attached to the subject's body; It is equipped with The support is a first support portion that covers and supports the light emitting element; a second support portion that covers and supports the light receiving element; a third support portion located between the first support portion and the second support portion; It contains At least one of the first support portion, the second support portion, and the third support portion has a higher flexibility than an adjacent portion. Medical sensors. Item 2: The support is A substrate; a first surface treatment layer formed on the surface of the substrate and having physical properties different from those of the substrate; It is equipped with the first surface treatment layer is not formed on the highly flexible portion; Item 1. The medical sensor according to item 1. Item 3: A light emitting element that emits light; a light receiving element that outputs a signal corresponding to the amount of incident light; a support body that supports the light emitting element and the light receiving element and is attached to the body of the subject; It is equipped with The support is a first adhesive surface adapted to be adhered to the body; a first fixed portion; a second fixing part having a second adhesive surface that covers a surface of the first fixing part and is adhered to the surface; It contains At least one portion of the surface has a lower adhesive potential than an adjacent portion; Medical sensors. Item 4: The support is A substrate; a first surface treatment layer formed on the surface of the substrate and having physical properties different from those of the substrate; It is equipped with the portion having low adhesive potential is not provided with the first surface treatment layer; Item 3. The medical sensor according to item 3. Item 5: The first surface treatment layer is formed to have an appearance different from that of the base material. Item 2 or 4. The medical sensor according to item 2 or 4. Item 6: The support includes a second surface treatment layer formed on at least one surface of the base material and the first surface treatment layer, and forming information to assist attachment to the subject's body. Item 6. The medical sensor according to item 2, 4, or 5. Item 7: The substrate is formed of a nonwoven fabric. A medical sensor according to any one of items 2 and 4 to 6. Item 8: the support body has a shape that is line-symmetrical with respect to a straight line connecting the light-emitting element and the light-receiving element; 8. The medical sensor according to any one of items 1 to 7. [Explanation of symbols]

[0065] 10: sensor, 11: light-emitting element, 12: light-receiving element, 14: support, 141: first support part, 142: second support part, 143: third support part, 144c: first adhesive surface, 144d: second adhesive surface, 145: first fixing part, 145a: low-adhesion part, 146: second fixing part, 147a: first base material, 148: first surface treatment layer, 149: second surface treatment layer, F: finger, L: straight line

Claims

1. A light emitting element that emits light; a light receiving element that outputs a signal corresponding to the amount of incident light; A support attached to the subject's body; It is equipped with The support is a first support portion that covers and supports the light emitting element; a second support portion that covers and supports the light receiving element; a third support portion located between the first support portion and the second support portion; It contains At least one of the first support portion, the second support portion, and the third support portion has a higher flexibility than an adjacent portion. Medical sensors.

2. The support is A substrate; a first surface treatment layer formed on the surface of the substrate and having physical properties different from those of the substrate; It is equipped with the first surface treatment layer is not formed on the highly flexible portion; The medical sensor of claim 1 .

3. A light emitting element that emits light; a light receiving element that outputs a signal corresponding to the amount of incident light; a support body that supports the light emitting element and the light receiving element and is attached to the body of the subject; It is equipped with The support is a first adhesive surface adapted to be adhered to the body; a first fixed portion; a second fixing part having a second adhesive surface that covers a surface of the first fixing part and is adhered to the surface; It contains At least one portion of the surface has a lower adhesive potential than an adjacent portion; Medical sensors.

4. The support is A substrate; a first surface treatment layer formed on the surface of the substrate and having physical properties different from those of the substrate; It is equipped with the portion having low adhesive potential is not provided with the first surface treatment layer; The medical sensor according to claim 3 .

5. The first surface treatment layer is formed to have an appearance different from that of the base material. The medical sensor according to claim 2 or 4.

6. The support includes a second surface treatment layer formed on at least one surface of the base material and the first surface treatment layer, and forming information to assist attachment to the subject's body. The medical sensor according to claim 2 or 4.

7. The substrate is formed of a nonwoven fabric. The medical sensor according to claim 2 or 4.

8. the support body has a shape that is line-symmetrical with respect to a straight line connecting the light-emitting element and the light-receiving element; The medical sensor of claim 1 .

9. A sensor support for attaching a medical sensor to a body of a subject, the medical sensor comprising a light-emitting element for emitting light and a light-receiving element for outputting a signal corresponding to the amount of incident light, a first support portion configured to cover and support the light emitting element; a second support portion configured to cover and support the light receiving element; a third support portion located between the first support portion and the second support portion; It is equipped with At least one of the first support portion, the second support portion, and the third support portion has a higher flexibility than an adjacent portion. Sensor support.

10. A sensor support for attaching a medical sensor to a body of a subject, the medical sensor comprising a light-emitting element for emitting light and a light-receiving element for outputting a signal corresponding to the amount of incident light, a first fixing portion having a first adhesive surface that is adhered to the body; a second fixing portion having a second adhesive surface that covers and is adhered to a surface of the first fixing portion; It is equipped with At least one portion of the surface has a lower adhesive potential than an adjacent portion; Sensor support.

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