Tissue blood oxygen sensor and corresponding medical device

Abstract

The invention discloses a tissue blood oxygen sensor which comprises a flexible shell used for being attached to a measured part of a patient in a matched shape when the tissue blood oxygen of the patient is measured. The flexible circuit board comprises at least one light-emitting device and at least two light-sensitive devices; the number of the light-emitting device is at least one; the number of the light-sensitive devices is at least two; the distance between any light-emitting device and any light-sensitive device is a detection distance, and at least two different detection distances exist on the flexible circuit board; wherein the plate body is provided with a main body part and an extension part extending from the edge of the main body part, at least part of the extension part is movably arranged relative to the shell, and the light-emitting device and / or the photosensitive device are / is connected to the extension part; a hollow part is formed on the main body part, and the main body part extends from the edge of the hollow part to the hollow part to form the extension part. And the joint is not easy to tear, break, separate and the like, so that the service life of the tissue blood oxygen sensor is prolonged.

Description

Technical Field

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

[0002] Tissue oximetry sensors measure localized tissue oxygen concentration. Because they use a different measurement principle than traditional pulse oximetry sensors, they require multiple components and a more complex circuit layout. Furthermore, the sensor must be attached to the patient's measured area in a suitable shape to accommodate different patients and measurement sites. Therefore, the internal circuitry of tissue oximetry sensors is typically flexible. One of the key advantages of flexible circuit boards 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 size, as well as high reliability and vibration resistance. However, their use in tissue oximetry sensors still presents challenges in achieving a satisfactory service life. Summary of the Invention

[0003] In view of the above problems, the present application intends to provide a tissue blood oxygen sensor with a long service life and can be used multiple times.

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

[0005] A flexible housing, wherein the housing is adapted to be attached to a measured portion of the patient in an adaptive shape when measuring the patient's tissue blood oxygen; and

[0006] A flexible circuit board is provided in the housing, the flexible circuit board comprising:

[0007] A board body, comprising a flexible substrate and a conductive circuit;

[0008] A device connected to the plate and fixedly arranged relative to the housing, electrically connected to the conductive circuit, 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;

[0009] The plate body comprises a main body and an extension portion extending from an edge of the main body, at least a portion of the extension portion is movably arranged relative to the housing, and the light emitting device and / or the photosensor device is connected to the extension portion;

[0010] The distance between any light-emitting device and any photosensitive device is a detection distance, and there are at least two different detection distances on the flexible circuit board;

[0011] The main body is formed with a hollow portion, and the main body extends the extension portion from the edge of the hollow portion into the hollow portion.

[0012] Furthermore, the extension portion includes a first extension portion and a second extension portion, the light emitting device is disposed on the first extension portion, and the photosensor is disposed on the second extension portion.

[0013] Furthermore, the hollow portion includes a first hollow portion and a second hollow portion, the main body extends the first extension portion from the edge of the first hollow portion to the first hollow portion, and the main body extends the second extension portion from the edge of the second hollow portion to the second hollow portion, the light-emitting device is arranged in the first hollow portion, and the photosensitive device is arranged in the second hollow portion.

[0014] Furthermore, the light emitting device and / or the photosensor device is connected to a first end portion of the extension portion, and a second end portion of the extension portion is connected to the main body portion.

[0015] Furthermore, the extension portion has more than two bending portions.

[0016] Furthermore, the extension portion has three bending portions, including a first bending portion and a C-shaped bending structure connected to the first bending portion;

[0017] Or the extension portion has five bending portions, including a first bending portion and a G-shaped bending structure connected to the first bending portion.

[0018] Furthermore, on the plane where the flexible circuit board is located, there is a first direction and a second direction that are orthogonal to each other, the light-emitting device and the photosensitive device are arranged along the first direction, and the size of the flexible circuit board in the first direction is larger than that in the second direction.

[0019] Furthermore, the extension portion includes a first extension portion and a second extension portion, the light-emitting device is connected to the end of the first extension portion, the photosensor is connected to the end of the second extension portion, and the end of the first extension portion and / or the end of the second extension portion extend along the first direction.

[0020] Furthermore, an edge of the hollow portion connected to the first extension portion and an edge of the hollow portion connected to the second extension portion are both edges of the hollow portion along the first direction.

[0021] Furthermore, a first side of at least one of the light-emitting devices is connected to two of the first extensions, or a first side and a second side opposite to each other of at least one of the light-emitting devices are respectively connected to two of the first extensions, and ends of the first extensions extend along the first direction; and / or

[0022] The first side of at least one of the photosensors is connected to two of the second extensions, or the opposite first and second sides of at least one of the photosensors are respectively connected to two of the second extensions, and ends of the second extensions extend along the first direction.

[0023] Furthermore, the flexible circuit board is in the shape of an elongated strip, the first direction is the length direction of the elongated strip, and the second direction is the width direction of the elongated strip;

[0024] A cable connection portion is provided on the plate, and the light-emitting device and the photosensitive device are respectively connected to the cable connection portion through the conductive circuit. The cable connection portion is arranged at one end of the long strip, and the first circuit connected to the light-emitting device and the second circuit connected to the photosensitive device in the conductive circuit respectively extend from both sides of the width direction along the length direction to the cable connection portion.

[0025] Furthermore, the extension portion includes a first extension portion and a second extension portion, the light-emitting device is connected to the end of the first extension portion, the photosensor is connected to the end of the second extension portion, and the edge of the hollow portion connected to the first extension portion and the edge of the hollow portion connected to the second extension portion are respectively located on both sides of the width direction.

[0026] Furthermore, the flexible circuit board is provided with an intra-board gap near the cable connection portion, and the intra-board gap separates the board body on both sides thereof into a first board body area and a second board body area. The first line extends to the cable connection portion through the first board body area, and the second line extends to the cable connection portion through the second board body area. One end of the intra-board gap extends to the hollow portion.

[0027] Furthermore, a cable connecting portion is provided on the board, and the light-emitting device and the photosensor device are respectively connected to the cable connecting portion through the conductive circuit.

[0028] Furthermore, the cable connection part includes a first cable connection part and a second cable connection part, the light emitting device is connected to the first cable connection part, and the photosensor is connected to the second cable connection part; a shielding structure is provided between the first cable connection part and the second cable connection part.

[0029] Furthermore, the width of the end portion of the extension portion is smaller than the width of the light-emitting device or the photosensor device connected thereto.

[0030] Furthermore, at least a portion of the main body is fixedly arranged relative to the shell.

[0031] Furthermore, the flexible circuit board is a single-layer board.

[0032] Furthermore, the tissue blood oxygen sensor can be reused for multiple patients.

[0033] The present application also provides a tissue blood oxygen sensor, comprising:

[0034] a flexible housing, wherein the housing is adapted to be attached to the patient in a shape adapted to the measured part when measuring tissue blood oxygen; and

[0035] A flexible circuit board is provided in the housing, the flexible circuit board comprising:

[0036] A board body, comprising a flexible substrate and a conductive layer;

[0037] Devices, the devices are arranged on the plate and fixed relative to the housing, and are electrically connected to the conductive layer, the devices include light-emitting devices and photosensitive devices, the number of the light-emitting devices is at least one and the number of the photosensitive devices is at least two;

[0038] The plate body comprises a main body and a plurality of extensions extending from edges of the main body, at least a portion of the extensions being movably arranged relative to the housing, and the light emitting device and the photosensor being connected to the extensions;

[0039] The distance between any light-emitting device and any photosensitive device is a detection distance, and there are at least two different detection distances on the flexible circuit board;

[0040] Each of the light-emitting devices and each of the photosensor devices is connected to one of the plurality of extension portions respectively.

[0041] The present application further provides a tissue blood oxygen sensor, comprising:

[0042] a flexible housing, wherein the housing is adapted to be attached to the patient in a shape adapted to the measured part when measuring tissue blood oxygen; and

[0043] A flexible circuit board is provided in the housing, the flexible circuit board comprising:

[0044] A board body, comprising a flexible substrate and a conductive layer;

[0045] Devices, the devices are arranged on the plate and fixed relative to the housing, and are electrically connected to the conductive layer, the devices include light-emitting devices and photosensitive devices, the number of the light-emitting devices is at least 2 or the number of the photosensitive devices is at least 2;

[0046] The plate body comprises a main body and an extension portion extending from an edge of the main body, at least a portion of the extension portion is movably arranged relative to the housing, and the light emitting device and / or the photosensor device is connected to the extension portion;

[0047] The distance between any light-emitting device and any photosensitive device is a detection distance. On the flexible circuit board, there are at least two different detection distances.

[0048] The present application also provides a medical device, which includes any of the above-mentioned tissue blood oxygen sensors.

[0049] Using the technical solution of the above embodiment, when the tissue oximetry sensor is attached to the patient's measured part, the flexible housing deforms to match the shape of the measured part, thereby causing the flexible circuit board disposed in the housing to also deform. Therefore, although the light-emitting device and the photosensitive device are fixed relative to the housing, due to the presence of the extension in the board body, and the fact that at least a portion of the extension is movable relative to the housing, the extension can deform in a more flexible manner relative to the main body, greatly reducing the stress on the extension, especially the stress at the connection between the extension and the light-emitting device and the photosensitive device, making the connection less likely to tear, break, or detach, thereby extending the service life of the tissue oximetry sensor.

[0050] 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

[0051] 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.

[0052] In the drawings of the specification:

[0053] Figure 1 This is a schematic diagram of the structure of the flexible circuit board in the tissue blood oxygen sensor according to the specific embodiment. Figure 1

[0054] Figure 2 This is a schematic diagram of the structure formed by assembling a flexible circuit board and one side of a housing in a tissue blood oxygen sensor according to a specific embodiment;

[0055] Figure 3 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.

[0056] Description of reference numerals:

[0057] X, first direction;

[0058] Y, second direction;

[0059] 01. Tissue blood oxygen sensor;

[0060] 11. Housing;

[0061] 12. Flexible circuit boards;

[0062] 121. Plate body;

[0063] 1213, main body;

[0064] 12141, first extension;

[0065] 12142, second extension;

[0066] 12143, first bending portion;

[0067] 12151, first hollow portion;

[0068] 12152, second hollow portion;

[0069] 12161, first plate area;

[0070] 12162, second plate area;

[0071] 12163, inter-plate gap;

[0072] 1217, cable connection;

[0073] 12171, first cable connection portion;

[0074] 12172, second cable connection portion;

[0075] 1221. Light-emitting device;

[0076] 1222. Photosensitive device;

[0077] 125. Shielding structure. DETAILED DESCRIPTION

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] The embodiments of this specification mainly introduce the technical contents such as the structure related to the tissue oxygen sensor and the corresponding medical equipment. Tissue oxygen measurement is to measure the oxygen saturation in the tissue by placing the sensor on the skin of the human forehead and other parts. This method usually uses light scattering technology to calculate the oxygen saturation by measuring the scattering and absorption of light in the tissue. Tissue oxygen measurement does not require pulse detection, so it can provide continuous oxygen saturation data and is suitable for long-term monitoring. Since the measurement of tissue oxygen requires the corresponding sensor to be attached to the human skin, it may need to adapt to different shapes of human surfaces. Therefore, the internal circuit of the tissue oxygen sensor usually uses FPC to meet the usage scenarios that require bending.

[0088] The above-mentioned FPC is the abbreviation of Flexible Printed Circuit, also known as flexible electronic circuit board. Therefore, in this application, the above names 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 making 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.

[0089] 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 flexible circuit boards, FPCs play an important role in electronics engineers' designs, offering greater design freedom and flexibility while meeting the requirements of a wide range of applications.

[0090] 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 reflection, 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 and photosensitive components on the FPC and the flexible FPC body, potentially leading to tearing of the connection and poor contact. Therefore, the inventors sought to improve the structure of tissue oximetry sensors to ensure that they remain stable and reliable despite repeated measurements and deformation of the subject's body surface. The key concept of the following embodiments is to form an extension on the FPC body, to which the light-emitting and photosensitive components are attached. Because the width of the extension is smaller than the size of the FPC body, the FPC is less likely to be damaged when the tissue oximetry sensor bends with the measuring surface. In particular, the connection between the FPC and the light-emitting device and the photosensitive device is greatly reduced due to force disconnection or poor contact, which can effectively extend the service life of the tissue oximetry sensor.

[0091] Specifically, such as Figures 1 to 3 As shown, this embodiment provides a tissue blood oxygen sensor 01, including:

[0092] A flexible housing 11, which is used to be attached to the patient's measured part in an adaptive shape when measuring the patient's tissue blood oxygen; and

[0093] A flexible circuit board 12 is provided in the housing 11, and the flexible circuit board 12 includes:

[0094] A board 121, comprising a flexible substrate and a conductive circuit;

[0095] A device connected to the plate 121 and fixedly disposed relative to the housing 11, electrically connected to the conductive circuit, comprising a light-emitting device 1221 and a photosensitive device 1222, wherein the number of the light-emitting device 1221 is at least one and the number of the photosensitive devices 1222 is at least two;

[0096] The plate 121 comprises a main body 1213 and an extension extending from an edge of the main body 1213 , at least a portion of the extension being movably disposed relative to the housing 11 , and the light emitting device 1221 and / or the photosensor 1222 being connected to the extension.

[0097] The distance between any light emitting device 1221 and any photosensitive device 1222 is a detection distance. On the flexible circuit board 12, there are at least two different detection distances.

[0098] The main body 1213 is formed with a hollow portion, and the main body 1213 extends the extension portion from the edge of the hollow portion into the hollow portion.

[0099] The flexible shell 11 cooperates with the PFC set in the shell 11 to allow the tissue blood oxygen sensor 01 to deform and bend when measuring the patient's tissue blood oxygen, so that the shell 11 can be attached to the patient's measured part in an adaptive shape, adapting to different patients and measurement parts, and improving the comfort and accuracy of the measurement.

[0100] Board 121 comprises a flexible substrate and conductive circuits, typically made of copper conductors. Devices connected to board 121 are electrically connected via the conductive circuits. In a preferred embodiment, the FPC utilizes a single-layer structure, i.e., a single-layer board, to minimize thickness, reduce constraints on the copper conductors, and facilitate bending. The copper conductive layer is made of highly ductile copper, and a thinner copper conductive layer also facilitates bending.

[0101] like Figure 1-Figure 3 In the FPC structure embodiment shown, both have two hollow parts in the length direction of the FPC. Figure 3 The two hollow parts in the FPC shown are both closed hollow parts. Figure 1 The hollow portion on the right side of the FPC shown is an open hollow portion, and the hollow portion on the left side is a closed hollow portion.

[0102] exist Figure 1-Figure 3 In the embodiment of the tissue blood oxygen sensor 01, one light-emitting device 1221 is provided on the FPC, namely, the light-emitting device 1221 is provided in the right hollow portion, and two photosensors 1222 are also provided on the FPC, namely, the photosensors 1222 are provided in the left hollow portion. Of course, more photosensors 1222 or more light-emitting devices 1221 may be provided as required by different embodiments.

[0103] The specific setting method is as follows Figure 1 As shown, an extension portion extends from the edge of the hollow portion of the PFC board 121 into the hollow portion, and at least one of the light-emitting device 1221 and the photosensitive device 1222 is connected to the extension portion, thereby improving the bending reliability performance of the tissue blood oxygen sensor 01. Of course, in a more preferred embodiment, both the light-emitting device 1221 and the photosensitive device 1222 are connected to the extension portion, which can further improve the bending reliability performance of the tissue blood oxygen sensor 01.

[0104] In some embodiments, the light emitting device 1221 uses an LED light emitting element as a light source, for example Figure 1-Figure 3In the embodiment shown, the light-emitting device 1221 is an LED module, in which four LED chips are arranged. One of the purposes of using multiple LED chips in the embodiment is to use different LED chips to generate light of different wavelengths, and to emit light of different wavelengths alternately within one light-emitting cycle.

[0105] In different embodiments, multiple light sources can be integrated into a light emitting device 1221, for example, multiple LED chips (lamp beads) are integrated in the above-mentioned LED module, or only one light source can be set in a light emitting device 1221. If multiple light sources are required, multiple light emitting devices 1221 can be set on the FPC.

[0106] In the embodiment, the distance between any light emitting device 1221 and any photosensitive device 1222 is the detection distance. On the flexible circuit board 12, there are at least two different detection distances. In tissue blood oxygen measurement, the photoelectric data measured by the two different detection distances are analyzed and compared to obtain tissue blood oxygen data. Since a certain and stable detection distance is required, the light emitting device 1221 and the photosensitive device 1222 are connected to the board body 121 and fixed relative to the housing 11. In this way, the distance between the light emitting device 1221 and the photosensitive device 1222, that is, the detection distance, is certain and stable. Figure 1-Figure 3 In the illustrated embodiment, the distances between the two photosensitive devices 1222 and the light emitting device 1221 are different, that is, there are two different detection intervals.

[0107] In some embodiments, a partial area of the plate body 121, such as the main body 1213 or a partial area of the main body 1213 may be fixed to the shell 11 by means of glue, double-sided tape, fixings, etc., but at least part of the extension portion is arranged to be relatively movable with respect to the shell 11, that is, to ensure that at least part of the extension portion is not fixed to the shell 11.

[0108] Using the technical solution of the above embodiment, when the tissue oximetry sensor 01 is attached to the patient's measured part, the flexible housing 11 deforms to match the shape of the measured part, thereby causing the FPC disposed in the housing 11 to also deform. Therefore, although the light-emitting device 1221 and the photosensor 1222 are fixed relative to the housing 11, due to the presence of the hollow portion and the extension in the plate 121, and the fact that at least a portion of the extension is movable relative to the housing 11, the extension can deform more flexibly relative to the main body 1213. The hollow portion also isolates the extension from the main body 1213, allowing the extension to deform with a different bending / twisting than the main body 1213. This significantly reduces stress on the extension, especially at the connection between the extension and the light-emitting device 1221 and the photosensor 1222, making the connection less susceptible to tearing, breaking, or detachment, thereby extending the service life of the tissue oximetry sensor 01.

[0109] In some embodiments, as Figure 1-Figure 3 As shown, the extension portion includes a first extension portion 12141 and a second extension portion 12142. The light-emitting device 1221 is disposed on the first extension portion 12141, and the photosensitive device 1222 is disposed on the second extension portion 12142. Placing the light-emitting device 1221 and the photosensitive device 1222 on different extension portions allows the FPC region where the light-emitting device 1221 and the photosensitive device 1222 are located to deform in different shapes and with different degrees of flexibility when the tissue oximetry sensor 01 is bent, further helping to reduce the stress caused by deformation on the FPC.

[0110] In some implementations, such as Figure 1-Figure 3 As shown, the hollow portion includes a first hollow portion 12151 and a second hollow portion 12152. The main body 1213 extends a first extension portion 12141 from the edge of the first hollow portion 12151 into the first hollow portion 12151. The main body 1213 extends a second extension portion 12142 from the edge of the second hollow portion 12152 into the second hollow portion 12152. The light-emitting device 1221 is disposed in the first hollow portion 12151, and the photosensitive device 1222 is disposed in the second hollow portion 12152. Placing the light-emitting device 1221 and the photosensitive device 1222 in different hollow portions allows the area containing the light-emitting device 1221 and the extension containing the photosensitive device 1222 to deform in different shapes and with different degrees of flexibility when the tissue oximetry sensor 01 is bent, further helping to reduce the stress impact of deformation on the FPC.

[0111] In some implementations, the light-emitting device 1221 is connected to the first end of the extension, and the second end of the extension (i.e., the end opposite the first end) is connected to the main body 1213. In some implementations, the photosensitive device 1222 is connected to the first end of the extension, and the second end of the extension (i.e., the end opposite the first end) is connected to the main body 1213. In some implementations, the light-emitting device 1221 and the photosensitive device 1222 are connected to the first end of the extension, and the second end of the extension (i.e., the end opposite the first end) is connected to the main body 1213. Connecting the light-emitting device 1221 and the photosensitive device 1222 to the end of the extension effectively utilizes the length of the extension. Given the same extension length, the FPC area where the light-emitting device 1221 and the photosensitive device 1222 are located, particularly the FPC area surrounding the connection between the light-emitting device 1221 and the photosensitive device 1222 and the FPC, can be more flexible in deformation, thereby reducing deformation stress on the FPC.

[0112] In some embodiments of the tissue oximetry sensor 01, the extension portion has two or more bends. Because the two portions forming the bend extend in different directions, the bend exhibits a more flexible deformation pattern when the extension portion deforms. Furthermore, within the same space, for example, within a hollow portion of the same shape and size, the bend can effectively extend the length of the extension portion, facilitating the maximum possible extension length within a limited space, thereby achieving better deformation resistance. Therefore, in this embodiment, having two or more bends is a preferred solution.

[0113] In a more preferred embodiment, in some FPC configurations, a light-emitting device 1221 is disposed in the left hollow portion of the FPC, and two photosensors 1222 are disposed in the right hollow portion. In the left hollow portion, the two extensions housing light-emitting device 1221 each have three bends, including a first bend 12143 and a C-shaped bend structure connected to the first bend 12143. This extension configuration, with its three bends and the C-shaped bend structure, allows for more bends and a longer extension within a limited space. This results in a compact structure with improved deformation resistance, extending the life of the FPC.

[0114] In another more preferred embodiment, Figure 1 In the illustrated embodiment, the FPC shape structure, in the right hollow portion, the two extensions housing the light-emitting device 1221 each have five bends, including a first bend 12143 and a G-shaped bend structure connected to the first bend 12143. In the left hollow portion, the two extensions housing the photosensitive device 1222 each also have five bends, including a first bend 12143 and a G-shaped bend structure connected to the first bend 12143. This extension shape, with its five bends and the G-shaped bend structure, allows for a greater number of bends and a longer extension within a limited space. This results in a compact structure while offering improved deformation resistance, extending the life of the FPC.

[0115] In some embodiments of the tissue blood oxygen sensor 01, the plane where the flexible circuit board 12 is located has a first direction and a second direction that are orthogonal to each other. The light emitting device 1221 and the photosensitive device 1222 are arranged along the first direction. The size of the flexible circuit board 12 in the first direction is larger than that in the second direction. Figure 1-Figure 3The length of the flexible circuit board 12 is shown as a first direction, and the width of the flexible circuit board 12 is shown as a second direction. The light-emitting devices 1221 and the photosensors 1222 are arranged along the length. Since a certain distance between the light-emitting devices 1221 and the photosensors 1222 is required in the tissue oximetry sensor 01 as a detection spacing, setting the detection spacing to coincide with the longer direction of the PFC in the sensor helps achieve a compact and compact tissue oximetry sensor 01. It should be noted that in the embodiments of this application, the expression "consistent or similar directions" does not strictly require that the directions be identical in a mathematical sense. As long as the directions of the corresponding structures in the actual product are generally consistent and can achieve substantially the same purpose and substantially equivalent results, it is sufficient.

[0116] In a preferred embodiment of the tissue oximetry sensor 01, the extension portion includes a first extension portion 12141 and a second extension portion 12142. The light-emitting device 1221 is connected to the end of the first extension portion 12141, and the photosensor 1222 is connected to the end of the second extension portion 12142. The ends of the first extension portion 12141 and / or the ends of the second extension portion 12142 extend along the first direction. That is, the last section of the extension portion connected to the light-emitting device 1221 and the photosensor 1222 extends in the same direction as the first direction. Since the tissue oximetry sensor 01 of the above embodiment typically bends in the first direction during use, the last section of the extension portion connected to the light-emitting device 1221 and the photosensor 1222 is configured to extend along the first direction. The bending direction of the last section of the extension portion can be configured to be perpendicular to the width of the extension portion. This bending direction minimizes the impact on the connection between the device and the extension portion, allows the device to take advantage of its larger dimension in the first direction, and minimizes the increase in dimension in the second direction.

[0117] In some embodiments, as Figure 1 As shown, the edge of the hollow portion connected to the first extension portion 12141 and the edge of the hollow portion connected to the second extension portion 12142 are both edges of the hollow portion along the first direction. This arrangement is beneficial to the wiring layout of the FPC.

[0118] In some embodiments, as Figure 1As shown, the first side of at least one light-emitting device 1221 is connected to two first extensions 12141, or the first and second opposing sides of at least one light-emitting device 1221 are respectively connected to two first extensions 12141, with the ends of the first extensions 12141 extending along the first direction; and / or the first side of at least one photosensitive device 1222 is connected to two second extensions 12142, or the first and second opposing sides of at least one photosensitive device 1222 are respectively connected to two second extensions 12142, with the ends of the second extensions 12142 extending along the first direction. Since the tissue oximetry sensor 01 of the above embodiment typically bends in the first direction during use, the ends of the extensions connected to the light-emitting devices 1221 and the photosensitive devices 1222 are configured to extend in the first direction. The bending direction of the extension ends can be configured to be perpendicular to the width of the extensions. This bending direction is less likely to affect the connection between the device and the extension, and the larger dimension of the device in the first direction can be fully utilized, without increasing the dimension in the second direction. At the same time, if extensions are provided on both sides of the photosensitive device 1222 or the light-emitting device 1221 to connect thereto, the number of lines connected on one side can be reduced, thereby reducing the width of the extension. A smaller extension width can more effectively cope with the bending of the FPC.

[0119] like Figures 1 to 3 In the tissue blood oxygen sensor 01 shown, the flexible circuit board 12 is in the shape of an elongated strip, the first direction is the length direction of the elongated strip, and the second direction is the width direction of the elongated strip; a cable connection portion 1217 is provided on the board body 121, and the light-emitting device 1221 and the photosensitive device 1222 are respectively connected to the cable connection portion 1217 through the conductive circuit. The cable connection portion 1217 is provided at one end of the elongated strip, and the first circuit connecting the light-emitting device 1221 and the second circuit connecting the photosensitive device 1222 in the conductive circuit respectively extend from both sides of the width direction along the length direction to the cable connection portion 1217.

[0120] In some embodiments, the cable connection portion 1217 is disposed at one end of the plate 121 in the first direction.

[0121] In some embodiments, the cable connection portion 1217 has a core contact connected to the core of the cable, and the core of the cable is electrically connected to the core on the FPC by welding or fixing with a fixing member.

[0122] Extending the first and second conductive traces from opposite sides of the width direction to the cable connection portion 1217 along the length direction helps reduce the number of traces on a single side, disperses the traces, and better utilizes the space on the FPC. It also allows for a narrower FPC on one side. As analyzed in the above embodiment, a narrower FPC structure in the width direction (second direction) offers better resistance to bending in the length direction (first direction). Separating the traces connecting the light-emitting device 1221 from the traces connecting the photosensitive device 1222 reduces circuit interference.

[0123] like Figure 1 In the illustrated embodiment, the extension portion includes a first extension portion 12141 and a second extension portion 12142. The light-emitting device 1221 is connected to the end of the first extension portion 12141, and the photosensor 1222 is connected to the end of the second extension portion 12142. The edges of the hollow portion connecting to the first extension portion 12141 and the edges of the hollow portion connecting to the second extension portion 12142 are located on opposite sides of the width direction. This allows the wiring connecting the light-emitting device 1221 and the wiring connecting to the photosensor 1222 to be routed separately from the width direction, facilitating their separate placement. As discussed in the above embodiment, this helps reduce the number of wiring on a single side, distributing the wiring, better utilizing space on the FPC, and allowing the FPC to be narrower on one side. As discussed in the above embodiment, a narrower FPC structure in the width direction provides better resistance to bending in the longitudinal direction. Furthermore, separating the wiring connecting to the light-emitting device 1221 and the wiring connecting to the photosensor 1222 reduces circuit interference.

[0124] like Figures 1 to 3In the illustrated embodiment, the tissue oximetry sensor 01 includes an intra-board gap 12163 near the cable connection portion 1217 on the flexible printed circuit board 12. This gap 12163 separates the board body 121 on either side into a first board area 12161 and a second board area 12162. The first circuit extends through the first board area 12161 to the cable connection portion 1217, and the second circuit extends through the second board area 12162 to the cable connection portion 1217. One end of the intra-board gap 12163 extends to the hollow portion. By providing intra-board gap 12163 to separate the first and second board areas 12161 and 12162, the corresponding FPC area is divided into at least two sections in the width direction, reducing the width dimension of the corresponding area. As discussed in the above embodiment, a narrower FPC structure provides improved resistance to longitudinal bending. At the same time, the first circuit in the first board area 12161 is separated from the second circuit in the second board area 12162, thereby reducing mutual interference between the two circuits.

[0125] like Figures 1 to 3 In the illustrated embodiment, in the tissue blood oxygen sensor 01 , a cable connection portion 1217 is provided on the board 121 , and the light emitting device 1221 and the photosensor 1222 are respectively connected to the cable connection portion 1217 via the conductive lines.

[0126] like Figures 1 to 3 In the illustrated embodiment, in the tissue oximetry sensor 01, the cable connection portion 1217 includes a first cable connection portion 12171 and a second cable connection portion 12172. The light-emitting device 1221 is connected to the first cable connection portion 12171, and the photosensor 1222 is connected to the second cable connection portion 12172. A shielding structure 125 is provided between the first and second cable connection portions 12171, 12172. Providing the shielding structure 125 between the first and second cable connection portions 12171, 12172 can reduce electrical interference between the wiring within the first and second cable connection portions 12171, 12172.

[0127] In a preferred embodiment, if Figures 1 to 3As shown, the width of the end portion of the extension is smaller than the width of the light-emitting device 1221 or the photosensitive device 1222 connected thereto. A smaller width provides better resistance to bending in the longitudinal direction. Furthermore, since the width of the end portion of the extension is smaller than the width of the light-emitting device 1221 or the photosensitive device 1222 connected thereto, even if the tissue oximetry sensor 01 bends in the width direction due to external forces, the end portion of the extension is less susceptible to the force, thereby better protecting the connection between the extension portion and the device and preventing it from cracking or falling off.

[0128] In some embodiments of the tissue oximetry sensor 01, at least a portion of the main body 1213 is fixed relative to the housing 11. This fixing can be achieved by glue, double-sided tape, fasteners, etc., so that the FPC is not easily moved relative to the housing 11, making the internal structure of the sensor more stable.

[0129] In some embodiments of the tissue blood oxygen sensor 01, the flexible circuit board 12 is a single-layer board. Using a single-layer board helps reduce the thickness of the FPC, thereby achieving a better bendability.

[0130] In some embodiments of the tissue oximetry sensor 01 , the tissue oximetry sensor 01 can be reused for multiple patients.

[0131] The present application also provides an embodiment of a tissue blood oxygen sensor 01, comprising: a flexible housing 11, wherein the housing 11 is used to be attached to the patient in a shape adapted to the measured part when measuring tissue blood oxygen; and a flexible circuit board 12 disposed in the housing 11, wherein the flexible circuit board 12 comprises: a board 121, wherein the board 121 comprises a flexible substrate and a conductive layer; a device, wherein the device is disposed on the board 121 and fixed relative to the housing 11, and is electrically connected to the conductive layer, wherein the device comprises a light-emitting device 1221 and a photosensitive device 1222, wherein the number of the light-emitting device 1221 is at least one and the number of the photosensitive device 1222 is at least one. The number of devices 1222 is at least 2; wherein the board body 121 has a main body 1213 and a plurality of extensions extending from the edges of the main body 1213, at least part of the extensions are movably arranged relative to the shell 11, and the light-emitting device 1221 and the photosensitive device 1222 are connected to the extensions; the distance between any light-emitting device 1221 and any photosensitive device 1222 is a detection spacing, and there are at least 2 different detection spacings on the flexible circuit board 12; wherein each of the light-emitting devices 1221 and each of the photosensitive devices 1222 is respectively connected to one of the plurality of extensions.

[0132] In the above embodiment, compared with the previously described embodiment, the extension portion may be directly extended outward from the edge of the FPC main body 1213 , and the extension portion does not have to be located in the hollow portion, and there may be no hollow portion on the FPC.

[0133] This application also provides the following embodiment of the tissue blood oxygen sensor 01, including:

[0134] A flexible housing 11, which is used to be attached to the patient in a shape adapted to the measured part when measuring tissue blood oxygen; and

[0135] A flexible circuit board 12 is provided in the housing 11, and the flexible circuit board 12 includes:

[0136] A plate body 121, wherein the plate body 121 includes a flexible substrate and a conductive layer;

[0137] Devices, the devices are arranged on the plate 121 and fixed relative to the housing 11, and are electrically connected to the conductive layer, the devices include light-emitting devices 1221 and photosensitive devices 1222, the number of the light-emitting devices 1221 is at least two or the number of the photosensitive devices 1222 is at least two;

[0138] The plate 121 comprises a main body 1213 and an extension extending from an edge of the main body 1213 , at least a portion of the extension being movably disposed relative to the housing 11 , and the light emitting device 1221 and / or the photosensor 1222 being connected to the extension.

[0139] The distance between any light emitting device 1221 and any photosensitive device 1222 is a detection interval. On the flexible circuit board 12 , there are at least two different detection intervals.

[0140] In the above embodiment, the light-emitting device 1221 and the photosensitive device 1222 are fixed relative to the housing 11, while a portion of the extension portion is movably disposed relative to the housing 11. Therefore, when the tissue oximetry sensor 01 is attached to the patient's measured part, the flexible housing 11 deforms to adapt to the shape of the measured part, thereby causing the FPC disposed in the housing 11 to also deform. Therefore, although the light-emitting device 1221 and the photosensitive device 1222 are fixed relative to the housing 11, the presence of the extension portion in the plate 121 that is at least partially movable relative to the housing 11 allows the extension portion to deform more flexibly relative to the main body 1213, and can also deform in a bending / twisting manner different from that of the main body 1213. This greatly reduces stress on the extension portion, especially the stress at the connection between the extension portion and the light-emitting device 1221 and the photosensitive device 1222, making the connection less likely to tear, break, or detach, thereby extending the service life of the tissue oximetry sensor 01.

[0141] In some embodiments, the extension portion and the main body portion 1213 are located on the same plane or curved surface.

[0142] The present application also provides embodiments related to medical devices, and the medical devices described in these embodiments include the tissue blood oxygen sensor 01 described in the above embodiments.

[0143] 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: A flexible housing, adapted to adhere to a measured portion of a patient in an adaptive shape when measuring tissue blood oxygenation in the patient; as well as A flexible circuit board is provided in the housing, the flexible circuit board comprising: A board body, comprising a flexible substrate and a conductive circuit; A device connected to the plate and fixedly arranged relative to the housing, electrically connected to the conductive circuit, 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; The plate body comprises a main body and an extension portion extending from an edge of the main body, at least a portion of the extension portion is movably arranged relative to the housing, and the light emitting device and / or the photosensor device is connected to the extension portion; The distance between any light-emitting device and any photosensitive device is a detection distance, and there are at least two different detection distances on the flexible circuit board; The main body is formed with a hollow portion, and the main body extends the extension portion from the edge of the hollow portion into the hollow portion.

2. The tissue blood oxygen sensor according to claim 1, characterized in that The extending portion includes a first extending portion and a second extending portion. The light emitting device is disposed on the first extending portion, and the photosensor is disposed on the second extending portion.

3. The tissue blood oxygen sensor according to claim 2, characterized in that The hollow portion includes a first hollow portion and a second hollow portion, the main body extends the first extension portion from the edge of the first hollow portion into the first hollow portion, and the main body extends the second extension portion from the edge of the second hollow portion into the second hollow portion, the light emitting device is arranged in the first hollow portion, and the photosensitive device is arranged in the second hollow portion.

4. The tissue blood oxygen sensor according to claim 1, wherein: The light emitting device and / or the photosensor device is connected to the first end portion of the extension portion, and the second end portion of the extension portion is connected to the main body portion.

5. The tissue blood oxygen sensor according to claim 4, characterized in that: The extension portion has two or more bending portions.

6. The tissue blood oxygen sensor according to claim 5, characterized in that The extension portion has three bending portions, including a first bending portion and a C-shaped bending structure connected to the first bending portion; Or the extension portion has five bending portions, including a first bending portion and a G-shaped bending structure connected to the first bending portion.

7. The tissue blood oxygen sensor according to claim 1, characterized in that The plane where the flexible circuit board is located has a first direction and a second direction that are orthogonal to each other. The light-emitting device and the photosensitive device are arranged along the first direction. The dimension of the flexible circuit board in the first direction is larger than that in the second direction.

8. The tissue blood oxygen sensor according to claim 7, characterized in that The extension portion includes a first extension portion and a second extension portion, the light emitting device is connected to an end portion of the first extension portion, the photosensor is connected to an end portion of the second extension portion, and the end portion of the first extension portion and / or the end portion of the second extension portion extends along the first direction.

9. The tissue blood oxygen sensor according to claim 8, characterized in that An edge of the hollow portion connected to the first extension portion and an edge of the hollow portion connected to the second extension portion are both edges of the hollow portion along the first direction.

10. The tissue blood oxygen sensor according to claim 8, characterized in that A first side of at least one of the light-emitting devices is connected to two of the first extensions, or a first side and a second side opposite to each other of at least one of the light-emitting devices are connected to two of the first extensions, and ends of the first extensions extend along the first direction; and / or The first side of at least one of the photosensors is connected to two of the second extensions, or the opposite first and second sides of at least one of the photosensors are respectively connected to two of the second extensions, and ends of the second extensions extend along the first direction.

11. The tissue blood oxygen sensor according to claim 7, characterized in that: The flexible circuit board is in the shape of an elongated strip, the first direction is the length direction of the elongated strip, and the second direction is the width direction of the elongated strip; A cable connection portion is provided on the plate, and the light-emitting device and the photosensitive device are respectively connected to the cable connection portion through the conductive circuit. The cable connection portion is arranged at one end of the long strip, and the first circuit connected to the light-emitting device and the second circuit connected to the photosensitive device in the conductive circuit respectively extend from both sides of the width direction along the length direction to the cable connection portion.

12. The tissue blood oxygen sensor according to claim 11, characterized in that The extension portion includes a first extension portion and a second extension portion, the light-emitting device is connected to the end of the first extension portion, the photosensor is connected to the end of the second extension portion, the edge of the hollow portion connected to the first extension portion, and the edge of the hollow portion connected to the second extension portion are respectively located on both sides of the width direction.

13. The tissue blood oxygen sensor according to claim 11, characterized in that The flexible circuit board is provided with an intra-board gap near the cable connection portion, and the intra-board gap separates the board body on both sides thereof into a first board body area and a second board body area. The first circuit extends to the cable connection portion through the first board body area, and the second circuit extends to the cable connection portion through the second board body area. One end of the intra-board gap extends to the hollow portion.

14. The tissue blood oxygen sensor according to claim 1, characterized in that A cable connecting portion is provided on the plate body, and the light emitting device and the photosensitive device are respectively connected to the cable connecting portion through the conductive lines.

15. The tissue blood oxygen sensor according to claim 14, 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. A shielding structure is provided between the first cable connection portion and the second cable connection portion.

16. The tissue blood oxygen sensor according to claim 1, characterized in that The width of the end portion of the extension portion is smaller than the width of the light emitting device or the photosensor device connected thereto.

17. The tissue blood oxygen sensor according to claim 1, characterized in that At least a portion of the main body is fixedly arranged relative to the shell.

18. The tissue blood oxygen sensor according to any one of claims 1 to 17, characterized in that: The flexible circuit board is a single-layer board.

19. The tissue blood oxygen sensor according to any one of claims 1 to 17, characterized in that: The tissue oximetry sensor can be reused on multiple patients.

20. A tissue blood oxygen sensor, characterized in that: include: A flexible housing, wherein the housing is adapted to be attached to the patient in a shape adapted to the measured part when measuring tissue blood oxygen; as well as A flexible circuit board is provided in the housing, the flexible circuit board comprising: A board body, comprising a flexible substrate and a conductive layer; Devices, the devices are arranged on the plate and fixed relative to the housing, and are electrically connected to the conductive layer, the devices include light-emitting devices and photosensitive devices, the number of the light-emitting devices is at least one and the number of the photosensitive devices is at least two; The plate body comprises a main body and a plurality of extensions extending from edges of the main body, at least a portion of the extensions being movably arranged relative to the housing, and the light emitting device and the photosensor being connected to the extensions; The distance between any light-emitting device and any photosensitive device is a detection distance, and there are at least two different detection distances on the flexible circuit board; Each of the light-emitting devices and each of the photosensor devices is connected to one of the plurality of extension portions respectively.

21. A tissue blood oxygen sensor, characterized in that: include: A flexible housing, wherein the housing is adapted to be attached to the patient in a shape adapted to the measured part when measuring tissue blood oxygen; as well as A flexible circuit board is provided in the housing, the flexible circuit board comprising: A board body, comprising a flexible substrate and a conductive layer; Devices, the devices are arranged on the plate and fixed relative to the housing, and are electrically connected to the conductive layer, the devices include light-emitting devices and photosensitive devices, the number of the light-emitting devices is at least 2 or the number of the photosensitive devices is at least 2; The plate body comprises a main body and an extension portion extending from an edge of the main body, at least a portion of the extension portion is movably arranged relative to the housing, and the light emitting device and / or the photosensor device is connected to the extension portion; The distance between any light-emitting device and any photosensitive device is a detection distance. On the flexible circuit board, there are at least two different detection distances.

22. A medical device, characterized in that The medical device comprises the tissue blood oxygen sensor according to any one of claims 1 to 21.

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