Tissue blood oxygen sensor and medical equipment

Abstract

The tissue blood oxygen sensor provided by the invention is better in fitting performance. Comprising a shell, the shell comprises a flexible light-proof shell body and a window part fixedly connected with the shell body, the window part is arranged on the first face of the shell, the first face is the face, used for being attached to a patient, of the shell when the blood oxygen of the tissue of the patient is measured, and the shell is provided with an inner cavity; the device is located in the inner cavity and is fixedly arranged relative to the shell, the device comprises at least one light-emitting device and at least two light-sensitive devices, and the positions of the light-emitting device and the light-sensitive devices correspond to the positions of the window part; the window part protrudes out of the surface of the shell and comprises a light-proof part relatively close to the shell and a light-transmitting part relatively far away from the shell. According to the tissue blood oxygen sensor, the window part is arranged on the flexible tissue blood oxygen sensor shell, and the light-emitting device and the photosensitive device which are closely related to the accuracy of a measurement result are fixedly arranged relative to the window part, so that the distance between the devices during measurement is stabilized, and the measurement accuracy is improved.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and in particular to a tissue blood oxygen sensor and medical equipment. Background Art

[0002] Tissue oximetry sensors measure localized tissue oxygen concentration. Compared to traditional pulse oximetry sensors, tissue oximetry sensors utilize a different measurement principle. The sensor must adhere to the patient's measured area in a suitable shape. This principle determines the sensor's conformability to the tissue, which affects its measurement accuracy. To meet the needs of different patients and measurement sites, tissue oximetry sensors are typically designed with a flexible structure. However, existing tissue oximetry sensors still lack ideal conformability. Summary of the Invention

[0003] In view of the above problems, the present application provides a tissue blood oxygen sensor with better fitting performance.

[0004] To achieve the above objectives, the inventors provide a tissue blood oxygen sensor, comprising:

[0005] The housing comprises a flexible, light-proof housing and a window portion fixedly connected to the housing, the window portion being provided on a first surface of the housing, the first surface being the surface of the housing for attaching to a patient when measuring tissue oxygenation of the patient, and the housing having an inner cavity;

[0006] a device located in the inner cavity and fixedly arranged relative to the housing, the device comprising a light-emitting device and a photosensitive device, the number of the light-emitting device being at least one and the number of the photosensitive devices being at least two, wherein the positions of the light-emitting device and the photosensitive device correspond to the window portion;

[0007] The window portion protrudes from the surface of the shell, and the window portion includes a light-proof portion relatively close to the shell and a light-transmitting portion relatively far away from the shell.

[0008] Furthermore, the window portion has a front side and a side side, the front side includes at least a portion of the light-transmitting portion of the window portion,

[0009] The side surface includes a light-proof portion of the window portion.

[0010] Furthermore, the first side of the shell is attached to the patient by a double-sided adhesive tape, and the height of the side surface is substantially the same as the thickness of the double-sided adhesive tape.

[0011] Furthermore, a convex lens structure is provided on a surface of at least one of the components facing the window portion; or

[0012] The window portion has a convex lens structure, and the convex lens structure is fixedly connected to the shell.

[0013] Furthermore, the tissue blood oxygen sensor also includes a flexible circuit board provided with the device, and the flexible circuit board is arranged in the inner cavity.

[0014] Furthermore, the housing includes a front shell provided with the window portion, and a back shell adapted to the front shell, wherein the front shell and the back shell enclose each other to form the inner cavity;

[0015] The front shell is provided with a mounting groove for embedding the light-emitting device and / or the photosensitive device at a position corresponding to the light-emitting device and / or the photosensitive device; and / or the back shell is provided with a mounting groove for embedding the light-emitting device and / or the photosensitive device at a position corresponding to the light-emitting device and / or the photosensitive device.

[0016] Furthermore, the flexible circuit board has a hollow portion, and an extension portion of the flexible circuit board extends from an edge of the hollow portion into the hollow portion, and the light-emitting device and / or the photosensitive device is arranged on the extension portion;

[0017] At least one of the mounting grooves is provided with a notch at a position corresponding to the extending portion for the extending portion to pass through.

[0018] Furthermore, the housing includes a front shell provided with the window portion, and a back shell adapted to the front shell, wherein the front shell and the back shell enclose each other to form the inner cavity;

[0019] A circuit board positioning structure is protruded from the inner surface of the front shell and / or the back shell. The circuit board positioning structure is adapted to the flexible circuit board and fixes the flexible circuit board.

[0020] Furthermore, a cable connection portion is provided on the flexible circuit board, and the light-emitting device and the photosensor device are respectively connected to the cable connection portion through conductive circuits provided on the flexible circuit board.

[0021] Further, the cable connection portion includes a first cable connection portion and a second cable connection portion, the light emitting device is connected to the first cable connection portion, and the photosensor is connected to the second cable connection portion;

[0022] The tissue blood oxygen sensor further includes a cable, wherein the cable includes a first cable and a second cable arranged in parallel.

[0023] The first cable is connected to the first cable connecting portion, and the second cable is connected to the second cable connecting portion.

[0024] Furthermore, the cable includes a cable sheath layer, and the first cable and the second cable are both wrapped in the cable sheath layer.

[0025] Furthermore, the wire core in the first cable is wrapped by a first wrapping layer, and the wire core in the second cable is wrapped by a second wrapping layer, and both the first wrapping layer and the second wrapping layer include a shielding layer.

[0026] Furthermore, the cross-section of the cable is waist-shaped, oval-shaped, rounded rectangular or figure-8-shaped.

[0027] Furthermore, the cross-section of the cable has a larger dimension in the width direction than in the thickness direction.

[0028] Furthermore, the tissue blood oxygen sensor also includes a connector protection structure corresponding to the cable connection portion.

[0029] Furthermore, a first direction and a second direction extending orthogonally to each other extend from the first surface of the housing, the light emitting device and the photosensitive device are arranged along the first direction, and a size of the housing in the first direction is larger than a size in the second direction.

[0030] Further, in the first direction, the housing has a recessed portion between the light emitting device and the photosensor device.

[0031] Furthermore, the recessed portion is a groove that runs across the first surface or the second surface, and the second surface is the other surface of the housing opposite to the first surface.

[0032] Furthermore, the tissue blood oxygen sensor further comprises a support frame and a flexible circuit board provided with the device, wherein the flexible circuit board is provided on the support frame, and the support frame is provided in the inner cavity;

[0033] The support frame is elastic or plastic and can bend in the normal direction of the first direction when subjected to an external force. At positions corresponding to the light-emitting device and / or the photosensitive device, the support frame has a stronger bending resistance than the flexible circuit board.

[0034] Furthermore, the support frame has a lattice structure at a position corresponding to the light-emitting device and / or the photosensitive device and / or the cable connecting portion, and the light-emitting device and / or the photosensitive device and / or the cable connecting portion are placed in the lattice structure.

[0035] Furthermore, the support frame is provided with more than three horizontal bars in the second direction, and the flexible circuit boards are arranged on the horizontal bars in an alternating manner up and down.

[0036] Furthermore, the flexible circuit board has a bent portion that arches in the thickness direction of the shell, and an extending direction of the bent portion is substantially perpendicular to the first direction.

[0037] Furthermore, the tissue blood oxygen sensor is at least partially curved along the first direction in a natural state.

[0038] Furthermore, the flexible circuit board has a main body portion and an extension portion extending from an edge of the main body portion, and the light-emitting device and / or the photosensor device are arranged on the extension portion.

[0039] Furthermore, the window portion is formed by a mold.

[0040] Furthermore, the window portion is bonded to the device to be fixed relative to the device.

[0041] Furthermore, the shell and the window portion are bonded or integrally formed.

[0042] Furthermore, the shell is made of silicone or rubber.

[0043] Furthermore, the shell includes a mounting groove protruding toward the inner cavity, and the mounting groove is used to fix the device.

[0044] Furthermore, the housing includes a plate groove facing the inner cavity, and the plate groove is adapted to the outer shape of the flexible circuit board; or

[0045] The housing includes a positioning protrusion facing the inner cavity, and the flexible circuit board has a positioning hole adapted to the positioning protrusion; or

[0046] The flexible circuit board is bonded to the inner wall of the housing by glue or double-sided tape.

[0047] Furthermore, the tissue blood oxygen sensor can be reused for multiple patients.

[0048] Using the technical solution of the above embodiment, a window is provided in the housing of a flexible tissue oximetry sensor. The light-emitting device and the photosensitive device, which are crucial for the accuracy of the measurement results, are fixed relative to the window to stabilize the device spacing during measurement and improve measurement accuracy. The window is also positioned higher than the housing surface. This allows for double-sided tape to be attached to the housing surface during measurement, allowing the sensor to be securely fixed to the patient's body surface. The height difference between the window and the housing surface provides sufficient thickness for the double-sided tape attached to the housing surface, ensuring that the window on the sensor is substantially flush with the tape surface after the tape is attached. This not only facilitates attachment of the tape to the sensor, but also ensures that the distance between the device's emitted and received light and the body surface meets the sensor's design requirements. This ensures a stable and controllable distance between the device and the body surface, facilitating improved tissue oximetry detection accuracy.

[0049] The present application also provides a tissue blood oxygen sensor, comprising:

[0050] The housing comprises a flexible, light-proof shell and a light-transmitting window portion, wherein the window portion is provided on a first surface of the housing, the first surface being the surface of the housing for attaching to a patient during measurement, and the housing has an inner cavity;

[0051] A device is fixed relative to the shell, and the device includes a light-emitting device and a photosensitive device. The number of the light-emitting devices is at least 2 or the number of the photosensitive devices is at least 2, wherein the positions of the light-emitting device and the photosensitive device correspond to the window portion.

[0052] By adopting the technical solution of the above embodiment, a window portion is provided on the flexible tissue blood oxygen sensor housing, and the light-emitting device and the photosensor device, which are closely related to the accuracy of the measurement results, are fixed relative to the window portion to stabilize the device spacing during measurement and improve measurement accuracy.

[0053] In addition, the present application provides a medical device, which includes any one of the above-mentioned tissue blood oxygen sensors.

[0054] The above-mentioned records related to the content of the invention are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The drawings are only used to illustrate the principles, implementation methods, applications, features and effects of the specific embodiments of the present invention and other related contents, and are not to be considered as limiting the present application.

[0056] In the drawings of the specification:

[0057] Figure 1 This is a schematic diagram of the overall structure of the tissue blood oxygen sensor and cable according to a specific embodiment;

[0058] Figure 2 This is an exploded view of the structure of the flexible circuit board and the housing in the tissue blood oxygen sensor according to the specific embodiment;

[0059] Figure 3 This is a schematic diagram of the side view of the tissue blood oxygen sensor described in the specific embodiment;

[0060] Figure 4 This is a schematic diagram of the shell structure of the tissue blood oxygen sensor according to the specific embodiment. Figure 1 ;

[0061] Figure 5 This is a schematic diagram of the shell structure of the tissue blood oxygen sensor according to the specific embodiment. Figure 2 ;

[0062] Figure 6 This is a schematic diagram of the shell structure of the tissue blood oxygen sensor according to the specific embodiment. Figure 3 ;

[0063] Figure 7 This is a schematic structural diagram of a flexible circuit board in a tissue blood oxygen sensor according to a specific embodiment;

[0064] Figure 8 This is a schematic diagram of the flexible circuit board and support frame structure of the tissue blood oxygen sensor described in the specific embodiment;

[0065] Figure 9 This is a schematic cross-sectional view of a cable connected to a tissue oxygen sensor according to a specific embodiment;

[0066] Figure 10 This is a schematic diagram of a double-sided tape attached to the surface of the housing according to the specific embodiment;

[0067] Figure 11a Schematic diagram of the arrangement of the opaque part and the transparent part on the housing in the specific embodiment Figure 1 ;

[0068] Figure 11b Schematic diagram of the arrangement of the opaque part and the transparent part on the housing in the specific embodiment Figure 2 ;

[0069] Figure 11c Schematic diagram of the arrangement of the opaque part and the transparent part on the housing in the specific embodiment Figure 3 .

[0070] Description of reference numerals:

[0071] x, first direction;

[0072] y, second direction;

[0073] 11. Shell;

[0074] 1111, noodle shell;

[0075] 1112, back shell;

[0076] 1113, mounting slot;

[0077] 11131, gap;

[0078] 1115, positioning protrusion;

[0079] 112. Window Department;

[0080] 1121, front;

[0081] 1122, side view;

[0082] 113. The first side of the housing;

[0083] 114. The second side of the housing;

[0084] 115, inner cavity;

[0085] 116, recessed portion;

[0086] 117. Convex lens structure;

[0087] 118. opaque portion;

[0088] 119, light-transmitting part;

[0089] 121. Light-emitting device;

[0090] 122. Photosensitive devices;

[0091] 13. Flexible circuit board;

[0092] 131, hollow part;

[0093] 132, extension;

[0094] 133. Cable connection part;

[0095] 1331, first cable connection portion;

[0096] 1332. Second cable connection portion;

[0097] 134. Main body;

[0098] 14. Cables;

[0099] 141. First cable;

[0100] 142. Second cable;

[0101] 143. Cable sheath;

[0102] 144, first wrapping layer;

[0103] 145, second wrapping layer;

[0104] 15. Joint protection structure;

[0105] 16. Support frame;

[0106] 161, frame structure;

[0107] 162, horizontal bar;

[0108] 17. Double-sided tape. DETAILED DESCRIPTION

[0109] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0110] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0111] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0112] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0113] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0114] Without further limitations, in this application, the words "include", "comprise", "have" or other similar open-ended expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product that includes the elements, so that the process, method or product that includes a series of elements may include not only those defined elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method or product.

[0115] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.

[0116] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0117] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0118] A tissue oximetry sensor is a sensor that measures the oxygen concentration in local tissues of the human body. Compared to traditional pulse oximetry sensors, tissue oximetry sensors have different measurement principles. When measuring tissue oximetry, the sensor needs to be attached to the patient's measured area in a suitable shape. The measurement principle of the tissue oximetry sensor determines the fit between the sensor and the measured tissue. The stability of the spacing between components within the sensor also affects the sensor's measurement accuracy. To meet the needs of different patients and different measurement areas, tissue oximetry sensors are typically flexible structures as a whole. However, even so, the fit of existing tissue oximetry sensors is still less than ideal. Currently, existing tissue oximetry sensors are divided into two categories: disposable and reusable. Disposable tissue oximetry sensors are made of non-woven fabric to ensure their softness and comfort. Reusable tissue oximetry sensors are primarily made of materials such as silicone rubber and polyvinyl chloride, and their structure is unreasonable, making them difficult to fix on the patient's body surface. In light of this, the inventors, after careful observation, analysis, and reflection, have concluded that, on the one hand, stabilizing the position of the light-emitting device and the photosensitive device in the sensor during measurement to fix the distance between the two during measurement can improve measurement accuracy. On the other hand, a reasonable structure can be provided to facilitate attachment of the flexible housing to the patient's body surface to stabilize the distance between the light-emitting device, the photosensitive device, and the tissue, while also fixing the sensor, thereby also improving the accuracy of tissue blood oxygen measurement. Therefore, this application provides the following embodiments.

[0119] See also Figures 1 to 9 This embodiment provides a tissue blood oxygen sensor, including:

[0120] The housing 11 includes a flexible, light-proof housing and a window portion 112 disposed on the housing. The window portion 112 is disposed on a first surface 113 of the housing, which is the surface of the housing 11 that is attached to the patient when measuring tissue oxygenation. The housing 11 has an inner cavity 115.

[0121] a device located in the inner cavity 115 and fixedly disposed relative to the housing, the device comprising a light-emitting device 121 and a photosensitive device 122, the number of the light-emitting device 121 being at least one and the number of the photosensitive devices 122 being at least two, wherein the positions of the light-emitting device 121 and the photosensitive device 122 correspond to the window portion 112;

[0122] The window portion 112 protrudes from the surface of the housing, and includes a light-proof portion 118 relatively close to the housing and a light-transmitting portion 119 relatively far from the housing.

[0123] In the above embodiment, a window portion 112 is provided on the flexible tissue blood oxygen sensor housing 11, and the light emitting device 121 and the photosensitive device 122, which are closely related to the accuracy of the measurement results, are fixed relative to the window portion 112 to stabilize the device spacing during measurement and improve measurement accuracy. Figure 10 As shown, the window portion 112 is set higher than the shell surface, so that double-sided tape 17 can be attached to the shell surface during measurement, and the sensor is attached to the measured body surface using the double-sided tape 17 to firmly fix the sensor to the patient's measured body surface. At the same time, the height difference between the window portion 112 and the shell surface can provide a corresponding thickness space for the double-sided tape 17 attached to the shell surface, so that the window portion 112 on the sensor after the double-sided tape 17 is attached is roughly flush with the surface of the double-sided tape 17, which is convenient for attaching the double-sided tape 17 to the sensor and ensures that the distance between the device and the body surface meets the design requirements of the sensor, so that the distance between the device and the body surface is stable and controllable, which is conducive to improving the detection accuracy of tissue blood oxygen.

[0124] The light emitted by the light-emitting device 121 can pass through the light-transmitting portion 119 without substantially losing its original luminous intensity. The light emitted by the light-emitting device 121 is then reflected within the human body and incident upon the photosensor 122 through the light-transmitting portion 119. The opaque portion 118 is primarily used to prevent light from being directly incident upon the photosensor 122 through the window portion 112 without being reflected by the human body, thereby preventing it from affecting the accuracy of tissue oximetry measurement. Therefore, the transmittance of the light-transmitting portion 119 and the opaque portion 118 is primarily determined with respect to the wavelengths required for tissue oximetry measurement. The light-transmitting portion 119 only needs to transmit the wavelengths required for tissue oximetry measurement, such as the specific wavelengths emitted by the light-emitting device 121. Of course, the light-transmitting portion 119 can also transmit more wavelengths, or even transmit light in the entire visible light range and / or infrared range. Correspondingly, the opaque portion 118 only needs to absorb the wavelengths required for tissue oximetry measurement, such as the specific wavelengths emitted by the light-emitting device 121. Of course, the opaque portion 118 can also absorb more wavelengths, or even absorb light in the entire visible light range and / or infrared range. On the other hand, the terms "transmissive" and "opaque" as defined in this embodiment are more of relative concepts rather than absolute concepts. The translucent portion 119 is not limited to being 100% transmissive of light of the wavelength required for tissue oximetry measurement; for example, it may have a transmittance of 90%, 95%, or 98% or more, as long as it does not substantially affect the measurement; correspondingly, the opaque portion 118 is not limited to being completely opaque to light of the wavelength required for tissue oximetry measurement; for example, it may have a transmittance of less than 10%, 5%, or 2%, as long as it does not substantially affect the measurement.

[0125] exist Figure 2 、 Figure 7In the tissue oximetry sensor embodiment, one light-emitting device 121 is provided on the FPC, namely, the light-emitting device 121 is provided in the right hollow portion 131. Two photosensitive devices 122 are also provided on the FPC, namely, the photosensitive device 122 is provided in the left hollow portion 131. Of course, more photosensitive devices 122 or more light-emitting devices 121 may be provided as required by different embodiments.

[0126] The window portion 112 may be a shape that extends vertically or approximately vertically upward from the shell surface. In this embodiment, the window portion 112 has a front side 1121 and a side side 1122. Figure 11a As shown, in this embodiment, the side surface 1122 of the window portion 112 is set as the opaque portion 118, and the front surface 1121 of the window portion 112 is set as the translucent portion 119, or as shown in FIG. Figure 11b As shown, the portion of the window portion 112 close to the housing is set as an opaque portion 118, and the portion of the window portion 112 away from the housing and the front surface 1121 of the window portion 112 are set as a translucent portion 119. The window portion 112 can also be a convex lens structure 117 protruding from the surface of the housing, such as Figure 11c As shown, in this embodiment, the light-transmitting portion 119 is the middle portion of the convex lens structure 117 , and the light-impermeable portion 118 is the portion of the convex lens structure 117 close to the housing.

[0127] like Figure 4-Figure 6 As shown, in some embodiments, the window portion 112 is fixedly connected to the shell. Specifically, in some embodiments, it can be integrally formed with the shell by two-color injection molding; in other embodiments, a component that is at least partially transparent is embedded in the hollow portion 131 of the shell corresponding to the window portion 112 to form at least a light-transmitting portion 119. Among them, the opaque portion 118 and the light-transmitting portion 119 of the window portion 112 can be two independent components. For example, the opaque portion 118 can be formed by extending the opaque shell material upward, and the remaining portion is covered with a transparent material or component to form the light-transmitting portion 119; of course, an integrated window portion 112 can also be directly installed on the shell, which includes the opaque portion 118 and the light-transmitting portion 119. The opaque portion 118 itself can be directly formed of an opaque material, or it can be formed by covering the light-transmitting portion 119 with an opaque material.

[0128] like Figure 4 、 Figure 5 As shown, in some embodiments, the first surface 113 of the housing is attached to the patient by double-sided tape 17, and the window portion 112 has a side surface 1122 along a direction perpendicular to the first surface. Preferably, the height of the side surface 1122 can be substantially equivalent to the thickness of the commonly used double-sided tape 17.

[0129] In some embodiments, the window portion 112 has a front side 1121 and a side side 1122, wherein the front side 1121 includes at least a portion of the light-transmitting portion 119 of the window portion 112, and the side side 1122 includes the light-impermeable portion 118 of the window portion 112. Figure 11a and Figure 11b Two situations are shown in the figure.

[0130] like Figure 4 、 Figure 5 As shown, based on a further improvement of the above embodiment, the side surface 1122 of the window portion 112 protruding from the housing surface includes the light-proof portion 118 of the window portion 112. This can reduce the interference of light entering from the side surface 1122 on the detection result, which is conducive to improving the detection accuracy.

[0131] In some embodiments, in a direction perpendicular to the first surface, the size of the side surface 1122 is substantially the same as the thickness of the double-sided tape 17 .

[0132] like Figure 5 As shown, in some embodiments of the tissue oximetry sensor, at least one component has a convex lens structure 117 disposed on the surface facing the window portion 112; or the window portion 112 has a convex lens structure 117, and the convex lens structure 117 is fixedly connected to the housing. Optical lenses improve optical transmission or reception to enhance measurement accuracy. For example, the convex lens structure 117 can focus light emitted by the light-emitting device 121 and light reflected from the measured tissue at the photosensitive device 122, thereby increasing the effective light intensity and improving measurement accuracy.

[0133] In some embodiments of the tissue oximetry sensor, the tissue oximetry sensor further includes a flexible circuit board 13 equipped with components. The flexible circuit board 13 is disposed within the inner cavity 115. The flexible circuit board 13 comprises: a plate body 13 comprising a flexible substrate and conductive circuits; and components connected to the plate body 13 and fixed relative to the housing, electrically connected to the conductive circuits. The embodiments of the flexible circuit board 13 will be further described in subsequent embodiments.

[0134] like Figure 6As shown, in some embodiments of the tissue oximetry sensor, the housing includes a front shell 1111 having a window 112 and a back shell 1112 adapted to the front shell 1111. The front shell 1111 and the back shell 1112 together form the inner cavity 115. The front shell 1111 is provided with mounting grooves 1113 for embedding the light-emitting device 121 and / or the photosensor 122 at positions corresponding to the light-emitting device 121 and / or the photosensor 122. The back shell 1112 is provided with mounting grooves 1113 for embedding the light-emitting device 121 and / or the photosensor 122 at positions corresponding to the light-emitting device 121 and / or the photosensor 122. By positioning the light-emitting device 121 and / or the photosensor 122 in the mounting grooves 1113, the light-emitting device 121 and / or the photosensor 122 are fixed relative to the housing. Compared to using glue or other fixing methods, the mounting groove 1113 has a simple fixing structure, is easy to install and disassemble, and is not prone to damage to the device. The shape of the mounting groove 1113 can also be adapted to the corresponding light-emitting device 121 and photosensitive device 122, making the structure more compact and the device installation more secure.

[0135] In some embodiments, as Figure 2 、 Figure 4-Figure 6 As shown, the face shell 1111 consists of a transparent window portion 112 and a black silicone shell. Using a secondary vulcanization molding technique, the transparent window is first vulcanized and molded, then placed within the mold for secondary molding with the black silicone. This embodiment has the advantage of being able to control the relative position of the transparent windows. Device mounting grooves 1113 are formed within the transparent windows, and the light-emitting device 121 and the photosensor 122 are assembled and positioned within the grooves. This ensures consistent spacing between the sensor's optoelectronic components, thereby guaranteeing the measurement accuracy of the tissue oximetry sensor.

[0136] like Figure 2 、 Figure 7 As shown, in some embodiments of the tissue blood oxygen sensor, the flexible circuit board 13 has a hollow portion 131, and the flexible circuit board 13 has an extension portion 132 extending from the edge of the hollow portion 131 into the hollow portion 131, and the light-emitting device 121 and / or the photosensor 122 are arranged on the extension portion 132; at least one of the mounting slots 1113 is provided with a notch 11131 for the extension portion 132 to pass through at a position corresponding to the extension portion 132.

[0137] like Figure 2 、 Figure 7As shown, in some embodiments, the tissue blood oxygen sensor includes a flexible circuit board 13 disposed in the housing, the flexible circuit board 13 including: a flexible circuit board 13 including a flexible substrate and a conductive circuit; a device connected to the flexible circuit board 13 and fixedly disposed relative to the housing and electrically connected to the conductive circuit, the device including a light-emitting device 121 and a photosensitive device 122, the number of the light-emitting device 121 being at least one and the number of the photosensitive devices 122 being at least two; the flexible circuit board 13 has a main body 134 and an extension 132 extending from an edge of the main body 134, at least a portion of the extension 132 being movably disposed relative to the housing, the light-emitting device 121 and / or the photosensitive device 122 being connected to the extension 132; the distance between any light-emitting device 121 and any photosensitive device 122 is a detection spacing, and there are at least two different detection spacings on the flexible circuit board 13.

[0138] Of course, in addition to the solution of using FPC, the internal circuit of the sensor can also be formed directly through wires, or by combining wires with circuit boards. The above various forms of internal circuits of the sensor are all feasible for connecting devices.

[0139] In this application, FPC is the abbreviation of Flexible Printed Circuit (FPC), also known as flexible electronic circuit board. Therefore, in this application, the above terms have the same meaning. FPC is a circuit board made of a flexible substrate and has higher flexibility and bendability than traditional rigid circuit boards. FPC is generally composed of a film substrate and a conductive layer. The conductive circuit in the FPC is formed by the conductive layer, which can be copper foil or other conductive materials. By forming wires, pads, and other circuit components on the substrate, the FPC can achieve circuit connection and signal transmission. The substrate of the FPC is generally made of polyimide. Polyimide is a high-performance polymer material with excellent thermal stability, mechanical strength, and electrical insulation properties. It can maintain stable performance in high-temperature environments and has a low thermal expansion coefficient, allowing the FPC to maintain a relatively stable shape and size when the temperature changes. In addition to polyimide, other flexible materials such as polyester and polyetherketone can also be used as the substrate of the FPC. These materials have different properties and application ranges, and the appropriate substrate can be selected according to the specific application requirements.

[0140] One of the main advantages of FPCs is their flexibility and bendability. This allows them to conform to complex three-dimensional shapes and curved surfaces, making them useful in space-constrained applications. Furthermore, FPCs offer low weight and volume, as well as high reliability and vibration resistance. Overall, as a flexible circuit board, FPCs play an important role in electronic engineers' designs, offering greater design freedom and flexibility while meeting the requirements of a wide range of applications.

[0141] However, even with the use of an FPC in tissue oximetry sensors, a satisfactory service life is still unattainable, leading to the widespread use of single-use tissue oximetry sensors. After repeated research and consideration, the inventors discovered that a significant factor affecting the service life of tissue oximetry sensors lies in the rigid-flexible interface of the FPC components. During attachment and detachment from the measurement site, the bending of the sensor can damage the interface between the rigid light-emitting device 121 and photosensitive device 122 on the FPC and the flexible FPC 13, potentially leading to tearing of the connection and poor contact. Therefore, the inventors sought to improve the structure of the tissue oximetry sensor to ensure that the sensor maintains structural stability and reliability despite repeated measurements and deformation of the subject's body surface. The key concept of the following embodiments is the formation of an extension 132 on the main body of the FPC, to which the light-emitting device 121 and photosensitive device 122 are attached. Since the width of the extension portion 132 is smaller than the size of the FPC body, the FPC is not easily damaged when the tissue oximetry sensor bends with the measurement surface. In particular, the connection between the FPC and the light-emitting device 121 and the photosensitive device 122 is greatly reduced due to force disconnection or poor contact, which can effectively extend the service life of the tissue oximetry sensor.

[0142] Using the technical solution of the above embodiment, when the tissue oximetry sensor is attached to the patient's measured area, the flexible housing deforms to match the measured area, thereby causing the FPC disposed in the housing to deform as well. Therefore, although the light-emitting device 121 and the photosensor 122 are fixed relative to the housing, the presence of the hollow portion 131 and the extension portion 132 in the flexible circuit board 13, and the fact that at least a portion of the extension portion 132 is movable relative to the housing, allows the extension portion 132 to deform more flexibly relative to the main body 134. Furthermore, the hollow portion 131 also isolates the extension portion 132 from the main body 134, allowing the extension portion 132 to deform with a different bending / twisting than the main body 134. This significantly reduces stress on the extension portion 132, particularly at the connection between the extension portion 132 and the light-emitting device 121 and the photosensor 122, making the connection less susceptible to tearing, disconnection, or detachment, thereby extending the service life of the tissue oximetry sensor.

[0143] like Figure 2 As shown, in some embodiments of the tissue oximetry sensor, the housing includes a front shell 1111 having a window 112, and a back shell 1112 adapted to fit within the front shell 1111. The front shell 1111 and the back shell 1112 together form an inner cavity 115. A circuit board positioning structure protrudes from the inner surfaces of the front shell 1111 and / or the back shell 1112. The circuit board positioning structure mates with and secures the flexible circuit board 13. By providing the front shell 1111 and the back shell 1112 that can enclose the inner cavity 115, a simple and reliable tissue oximetry sensor structure can be formed. Furthermore, the circuit board positioning structure protrudes from the inner surfaces of the front shell 1111 and the back shell 1112. The circuit board positioning structure mates with and secures the flexible circuit board 13. The circuit board positioning structure can be a positioning protrusion 1115, a positioning column or a positioning bar, etc. The adaptation method can be a groove adapted to it set on the edge of the flexible circuit board 13, a positioning hole adapted to it opened on the flexible circuit board 13, a hollow part 131, etc.; or the FPC can be limited directly along the edge of the FPC by various methods such as the positioning protrusion 1115, the positioning column, and the positioning bar.

[0144] like Figure 2 、 Figure 7 、 Figure 8 As shown, in some embodiments of the tissue oximetry sensor, the flexible circuit board 13 is provided with a cable connection portion 133, and the light-emitting device 121 and the photosensor 122 are respectively connected to the cable connection portion 133 via conductive traces provided on the flexible circuit board 13. In this embodiment, the core of the cable 14 is electrically connected to the core of the FPC by welding or fixing with a fixing member.

[0145] Combine Figure 9 As shown, in a further embodiment, the cable connection portion 133 includes a first cable connection portion 1331 and a second cable connection portion 1332, the light-emitting device 121 is connected to the first cable connection portion 1331, and the photosensor 122 is connected to the second cable connection portion 1332; the tissue blood oxygen sensor also includes a cable 14, and the cable 14 includes a first cable 141 and a second cable 142 arranged in parallel; the first cable 141 is connected to the first cable connection portion 1331, and the second cable 142 is connected to the second cable connection portion 1332.

[0146] Based on the principle of tissue oximetry, cable 14 requires multiple wires. The thickness of the sensor at cable connection 133 is limited by the thickness of cable 14. The tissue oximetry probe described in this embodiment connects first cable connection 1331 and second cable connection 1332 via a first cable 141 and a second cable 142 arranged in parallel. Therefore, cable 14 in this embodiment has a flat wire structure, which effectively reduces the thickness of cable 14 and minimizes the thickness of the sensor, increasing its flexibility and facilitating its fit. Cable 14 utilizes a flat wire structure with two separate strands, which also separates the routing of light-emitting device 121 and photosensitive device 122, preventing crosstalk between the signals of light-emitting device 121 and photosensitive device 122 and ensuring signal quality.

[0147] In order to further reduce interference and improve detection accuracy, in some embodiments, the wire core in the first cable 141 is wrapped by a first wrapping layer 144, and the wire core in the second cable 142 is wrapped by a second wrapping layer 145, and the first wrapping layer 144 and the second wrapping layer 145 both include a shielding layer.

[0148] In order to protect the wire core and increase the durability and reliability of the product, in some embodiments, the cable 14 includes a cable sheath layer 143 , and the first cable 141 and the second cable 142 are both wrapped in the cable sheath layer 143 .

[0149] In some embodiments, the cross-section of the cable 14 is waist-shaped, oval-shaped, rounded rectangular, or figure-eight-shaped.

[0150] In order to reduce the thickness of the sensor and improve the bending performance and flexibility, in some embodiments, the cross-section of the cable 14 is larger in the width direction than in the thickness direction.

[0151] In order to increase the durability and reliability of the product, in some embodiments, the tissue blood oxygen sensor further includes a connector protection structure 15 corresponding to the cable connection portion 133 .

[0152] To reduce the overall size of the product, in some embodiments, the first surface 113 of the housing extends along a first direction and a second direction that are orthogonal to each other. The light-emitting devices 121 and the photosensors 122 are arranged along the first direction, and the housing 11 is larger in the first direction than in the second direction. During measurement, the housing 11 typically bends in the first direction, and the larger dimension in the first direction also helps to establish a detection distance between the light-emitting devices 121 and the photosensors 122.

[0153] like Figure 1-Figure 3As shown, to improve the sensor's adherence and flexibility, in some embodiments, the tissue oximetry sensor includes a recessed portion 116 between the light-emitting device 121 and the photosensor 122 in the first direction. As previously mentioned, during measurement, bending typically occurs in the first direction. Therefore, the housing 11 includes the recessed portion 116 between the light-emitting device 121 and the photosensor 122 in the first direction. Because the thickness of the recessed portion 116 is less than the overall thickness of the sensor, it is easier to bend when attached to the curved measurement surface during measurement. This increases flexibility and prevents the sensor from falling off the patient's body surface, thereby improving the sensor's adherence, comfort, and measurement accuracy. The recessed portion 116, where bending occurs more frequently between the light-emitting device 121 and the photosensor 122, also helps protect the internal components and the connection between the components and the circuitry, preventing them from tearing or falling off.

[0154] like Figure 1-Figure 3 As shown, in a further embodiment, the recessed portion 116 is a groove that runs across the first surface or the second surface, and the second surface 114 is the other surface of the housing 11 opposite to the first surface. A transverse groove can provide better bendability than a local groove.

[0155] like Figure 8 In one embodiment shown, the tissue oximetry sensor further includes a support frame 16 and a flexible circuit board 13 with components mounted thereon. The flexible circuit board 13 is mounted on the support frame 16, which is disposed within the inner cavity 115. The support frame 16 is elastic or plastic and can bend in a first normal direction when subjected to an external force. At locations corresponding to the light-emitting device 121 and / or the photosensor 122, the support frame 16 exhibits greater bending resistance than the flexible circuit board 13. In this embodiment, the support member protects the flexible circuit board 13, particularly the connection between the flexible circuit board 13 and the components.

[0156] like Figure 8 In the illustrated tissue oximetry sensor, in this embodiment, the support frame 16 has a lattice structure 161 at locations corresponding to the light-emitting device 121, the photosensor 122, and / or the cable connection portion 133. The light-emitting device 121, the photosensor 122, and / or the cable connection portion 133 are positioned within the lattice structure 161. The lattice structure 161 enhances the local strength of the support frame 16, while preserving the bending properties of the support frame 16 and further protecting the flexible circuit board 13, the devices, and the connection between the flexible circuit board 13 and the devices within the lattice.

[0157] like Figure 8In the tissue oximetry sensor shown in FIG. , in this embodiment, the support frame 16 is provided with three or more crosspieces 162 in the second direction, and the flexible printed circuit board 13 is interlaced vertically through the crosspieces 162. This structure effectively secures the flexible printed circuit board 13 to the support frame 16, while the crosspieces 162 also serve to enhance the local strength of the support frame 16.

[0158] In some embodiments of the tissue blood oxygen sensor, in order to provide an extension margin when the sensor is bent, the flexible circuit board 13 has a curved portion that arches in the thickness direction of the housing 11, and the extending direction of the curved portion is substantially perpendicular to the first direction.

[0159] like Figure 3 As shown, in some embodiments, the tissue oximetry sensor is at least partially curved along a first direction in its natural state. This configuration is intended to pre-bend the sensor into a curved surface commonly encountered during measurement, thereby reducing deformation during measurement and achieving better adhesion and performance.

[0160] like Figure 2 、 Figure 7 As shown, in some embodiments of the tissue oximetry sensor, the flexible printed circuit board 13 includes a main body 134 and an extension 132 extending from an edge of the main body 134. The light-emitting device 121 and / or the photosensitive device 122 are disposed on the extension 132. In the above-described embodiment, when the tissue oximetry sensor is attached to a patient's measured area, the flexible housing deforms to conform to the measured area, thereby causing the FPC disposed within the housing to deform as well. Therefore, although the light-emitting device 121 and the photosensitive device 122 are fixed relative to the housing, the extension 132 can deform more flexibly relative to the main body 134, significantly reducing stress on the extension 132, particularly at the connection between the extension 132 and the light-emitting device 121 and the photosensitive device 122. This reduces the risk of tearing, breaking, or detaching the connection, thereby extending the service life of the tissue oximetry sensor.

[0161] In some embodiments, the window portion 112 is formed by a mold.

[0162] In some embodiments, the window portion 112 is bonded to the device to be fixed relative to the device.

[0163] In some embodiments, the housing and the window portion 112 are bonded or integrally formed.

[0164] In some embodiments, the shell is made of silicone or rubber.

[0165] like Figure 6As shown, in some embodiments, the housing includes a mounting groove 1113 protruding toward the inner cavity 115, and the mounting groove 1113 is used to fix the device. In some embodiments, the mounting groove 1113 can also be a structure recessed on the housing, with its sidewalls sunk into the housing, so that the device is sunken into the housing.

[0166] In some embodiments, the housing includes a plate groove facing the inner cavity 115, and the plate groove is adapted to the shape of the flexible circuit board 13; or

[0167] The housing includes a positioning protrusion 1115 facing the inner cavity 115, and the flexible circuit board 13 has a positioning hole adapted to the positioning protrusion 1115; or

[0168] The flexible circuit board 13 is bonded to the inner wall of the housing by glue or double-sided tape 17 .

[0169] In some embodiments, the tissue oximetry sensor is reusable for multiple patients.

[0170] The present application also provides an embodiment of a tissue blood oxygen sensor, comprising:

[0171] The housing 11 includes a flexible, opaque shell and a translucent window 112. The window 112 is provided on a first surface 113 of the housing, which is the surface of the housing 11 that is attached to the patient during measurement. The housing 11 has an inner cavity 115.

[0172] The device is fixed relative to the shell, and the device includes a light-emitting device 121 and a photosensitive device 122. The number of the light-emitting devices 121 is at least 2 or the number of the photosensitive devices 122 is at least 2, wherein the positions of the light-emitting device 121 and the photosensitive device 122 correspond to the window portion 112.

[0173] In the above embodiment, a window portion 112 is provided on the flexible tissue oximetry sensor housing 11, and the light emitting device 121 and the photosensor 122, which are closely related to the accuracy of the measurement results, are fixed relative to the window portion 112 to stabilize the device spacing during measurement and improve measurement accuracy.

[0174] The present application also provides embodiments related to a medical device, wherein the medical device includes the tissue blood oxygen sensor described in any of the above embodiments.

[0175] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A tissue blood oxygen sensor, characterized in that: include: The housing comprises a flexible, light-proof housing and a window portion fixedly connected to the housing, the window portion being provided on a first surface of the housing, the first surface being the surface of the housing for attaching to a patient when measuring tissue oxygenation of the patient, and the housing having an inner cavity; a device located in the inner cavity and fixedly arranged relative to the housing, the device comprising a light-emitting device and a photosensitive device, the number of the light-emitting device being at least one and the number of the photosensitive devices being at least two, wherein the positions of the light-emitting device and the photosensitive device correspond to the window portion; The window portion protrudes from the surface of the shell, and the window portion includes a light-proof portion relatively close to the shell and a light-transmitting portion relatively far away from the shell.

2. The tissue blood oxygen sensor according to claim 1, characterized in that The window portion has a front side and a side side, the front side includes at least a portion of the light-transmitting portion of the window portion, The side surface includes a light-proof portion of the window portion.

3. The tissue blood oxygen sensor according to claim 2, characterized in that The first side of the shell is attached to the patient via a double-sided adhesive tape, and the height of the side surface is substantially the same as the thickness of the double-sided adhesive tape.

4. The tissue blood oxygen sensor according to claim 1, wherein: A convex lens structure is provided on a surface of at least one of the components facing the window portion; or The window portion has a convex lens structure, and the convex lens structure is fixedly connected to the shell.

5. The tissue blood oxygen sensor according to claim 1, characterized in that The tissue blood oxygen sensor further includes a flexible circuit board provided with the device, and the flexible circuit board is arranged in the inner cavity.

6. The tissue blood oxygen sensor according to claim 5, characterized in that The housing includes a front shell provided with the window portion, and a back shell adapted to the front shell, wherein the front shell and the back shell enclose the inner cavity; The front shell is provided with a mounting groove for embedding the light-emitting device and / or the photosensitive device at a position corresponding to the light-emitting device and / or the photosensitive device; and / or the back shell is provided with a mounting groove for embedding the light-emitting device and / or the photosensitive device at a position corresponding to the light-emitting device and / or the photosensitive device.

7. The tissue blood oxygen sensor according to claim 6, characterized in that The flexible circuit board has a hollow portion, an extension portion of the flexible circuit board extends from an edge of the hollow portion into the hollow portion, and the light emitting device and / or the photosensitive device is arranged on the extension portion; At least one of the mounting grooves is provided with a notch at a position corresponding to the extending portion for the extending portion to pass through.

8. The tissue blood oxygen sensor according to claim 5, characterized in that The housing includes a front shell provided with the window portion, and a back shell adapted to the front shell, wherein the front shell and the back shell enclose the inner cavity; A circuit board positioning structure is protruded from the inner surface of the front shell and / or the back shell. The circuit board positioning structure is adapted to the flexible circuit board and fixes the flexible circuit board.

9. The tissue blood oxygen sensor according to claim 5, characterized in that: A cable connection portion is provided on the flexible circuit board, and the light-emitting device and the photosensitive device are respectively connected to the cable connection portion through conductive lines provided on the flexible circuit board.

10. The tissue blood oxygen sensor according to claim 9, characterized in that: The cable connection portion includes a first cable connection portion and a second cable connection portion, the light emitting device is connected to the first cable connection portion, and the photosensor is connected to the second cable connection portion; The tissue blood oxygen sensor further includes a cable, wherein the cable includes a first cable and a second cable arranged in parallel. The first cable is connected to the first cable connecting portion, and the second cable is connected to the second cable connecting portion.

11. The tissue blood oxygen sensor according to claim 10, characterized in that: The cable includes a cable sheath layer, and the first cable and the second cable are both wrapped in the cable sheath layer.

12. The tissue blood oxygen sensor according to claim 10, characterized in that: The wire core in the first cable is wrapped by a first wrapping layer, and the wire core in the second cable is wrapped by a second wrapping layer. Both the first wrapping layer and the second wrapping layer include a shielding layer.

13. The tissue blood oxygen sensor according to claim 10, characterized in that The cross section of the cable is waist-shaped, oval, rounded rectangular or figure 8-shaped.

14. The tissue blood oxygen sensor according to claim 10, characterized in that The cross-section of the cable has a larger dimension in the width direction than in the thickness direction.

15. The tissue blood oxygen sensor according to claim 1, wherein: The tissue blood oxygen sensor further includes a connector protection structure corresponding to the cable connection portion.

16. The tissue blood oxygen sensor according to claim 1, characterized in that A first direction and a second direction extend orthogonally to each other on the first surface of the housing. The light emitting device and the photosensitive device are arranged along the first direction. The size of the housing in the first direction is larger than that in the second direction.

17. The tissue blood oxygen sensor according to claim 16, characterized in that In the first direction, the housing has a recessed portion between the light emitting device and the photosensor device.

18. The tissue blood oxygen sensor according to claim 17, characterized in that The recessed portion is a groove that runs across the first surface or the second surface, and the second surface is the other surface of the housing opposite to the first surface.

19. The tissue blood oxygen sensor according to claim 16, wherein: The tissue blood oxygen sensor further includes a support frame and a flexible circuit board provided with the device, wherein the flexible circuit board is provided on the support frame, and the support frame is provided in the inner cavity; The support frame is elastic or plastic and can bend in the normal direction of the first direction when subjected to an external force. At positions corresponding to the light-emitting device and / or the photosensitive device, the support frame has a stronger bending resistance than the flexible circuit board.

20. The tissue blood oxygen sensor according to claim 19, characterized in that The support frame has a lattice structure at positions corresponding to the light-emitting device and / or the photosensitive device and / or the cable connecting portion, and the light-emitting device and / or the photosensitive device and / or the cable connecting portion are placed in the lattice structure.

21. The tissue blood oxygen sensor according to claim 19, characterized in that The support frame is provided with more than three horizontal bars in the second direction, and the flexible circuit boards are arranged on the horizontal bars in an alternating manner up and down.

22. The tissue blood oxygen sensor according to claim 19, characterized in that The flexible circuit board has a bent portion that arches in the thickness direction of the housing, and an extending direction of the bent portion is substantially perpendicular to the first direction.

23. The tissue blood oxygen sensor according to claim 16, characterized in that The tissue blood oxygen sensor is at least partially curved along the first direction in a natural state.

24. The tissue blood oxygen sensor according to claim 5, characterized in that The flexible circuit board comprises a main body portion and an extension portion extending from an edge of the main body portion, and the light emitting device and / or the photosensitive device are arranged on the extension portion.

25. The tissue blood oxygen sensor according to claim 1, wherein The window portion is formed by a mold.

26. The tissue blood oxygen sensor according to claim 1, characterized in that The window portion is bonded to the device to be fixed relative to the device.

27. The tissue blood oxygen sensor according to any one of claims 1 to 26, characterized in that: The shell and the window portion are bonded or integrally formed.

28. The tissue blood oxygen sensor according to any one of claims 1 to 26, characterized in that: The shell is made of silicone or rubber.

29. The tissue blood oxygen sensor according to any one of claims 1 to 26, characterized in that: The shell includes a mounting groove protruding toward the inner cavity, and the mounting groove is used to fix the device.

30. The tissue blood oxygen sensor according to claim 5, characterized in that The housing includes a plate groove facing the inner cavity, and the plate groove is adapted to the outer shape of the flexible circuit board; or The housing includes a positioning protrusion facing the inner cavity, and the flexible circuit board has a positioning hole adapted to the positioning protrusion; or The flexible circuit board is bonded to the inner wall of the housing by glue or double-sided tape.

31. The tissue blood oxygen sensor according to any one of claims 1 to 26, characterized in that: The tissue oximetry sensor can be reused on multiple patients.

32. A tissue blood oxygen sensor, characterized in that: include: The housing comprises a flexible, light-proof shell and a light-transmitting window portion, wherein the window portion is provided on a first surface of the housing, the first surface being the surface of the housing for attaching to a patient during measurement, and the housing has an inner cavity; A device is fixed relative to the shell, and the device includes a light-emitting device and a photosensitive device. The number of the light-emitting devices is at least 2 or the number of the photosensitive devices is at least 2, wherein the positions of the light-emitting device and the photosensitive device correspond to the window portion.

33. A medical device, characterized in that The medical device comprises the tissue blood oxygen sensor according to any one of claims 1 to 32.

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