Oxygen saturation sensor

Abstract

According to the invention, an oxygen saturation sensor is provided. The oxygen saturation sensor comprises a textile base structure extending in the direction of the longitudinal axis, the base structure having a resettable cross-sectional shape, so that the oxygen saturation sensor can be fixed to the measurement site. The oxygen saturation sensor also includes a light emitting diode and a radiation detector. The light-emitting diode and the radiation detector are received in or on the base structure and are arranged in a cross-sectional plane of the base structure in such a way.

Description

Technical Field

[0001] The invention relates to an oxygen saturation sensor, in particular to a pulse oximeter type oxygen saturation sensor. Background Art

[0002] Oxygen saturation sensors are used to determine the saturation of blood with respect to oxygen (oxygen saturation). A special design of an oxygen saturation sensor is a pulse oximeter oxygen saturation sensor.

[0003] Oxygen saturation sensors are used, for example, in intensive care and anesthesia, wherein it is common for the oxygen saturation to be measured continuously over a longer period of time.

[0004] The oxygen saturation sensor has at least one light emitting diode (LED), for example a red LED and / or an infrared LED, and at least one radiation detector, for example a photodiode. To determine the oxygen saturation, the absorption or transmission properties of a measuring site (for example a user's finger) can be measured and evaluated with respect to the light emitted by the at least one LED.

[0005] Depending on the desired application, oxygen saturation sensors can be designed to be reusable or for single use.

[0006] The reusable sensor known from DE 3703458 A1 has a carrier made of silicone, rubber or polyurethane that can be deformed by material expansion, which can be placed on the patient's finger, arm or leg and attached there by clamping force. The sensor known from DE 3703458 A1 is complex to clean and sterilize due to the complex design of the carrier.

[0007] The sensor known from DE69117861T2 has a reusable sensor component, which includes a photodiode and can be positioned on a patient's finger. The sensor also has a disposable flexible element consisting of a nonwoven fabric, which can be fixed to the finger via an adhesive layer and includes a phototransmitter.

[0008] The blood oxygen saturation sensor known from US Pat. No. 6,073,038 A comprises a foam material covering element with a fixing element, a rear membrane fixing element, an LED assembly and a photodiode connected to a cable.

[0009] The oxygen saturation measuring device known from CN209122243U comprises a pressure sleeve. A bearing opening is configured at a first end of the pressure sleeve, and an oxygen saturation sensor is arranged at an inner wall of the pressure sleeve and near a second end of the pressure sleeve. The pressure sleeve is configured to be arranged on a finger of a person to be detected. The pressure sleeve is made of elastic fabric.

[0010] A wearable device for monitoring one or more vital signs of a human body is known from US2020 / 0015746A1. The device comprises a carrier adapted to be worn around the abdomen of the body and comprises an electrode assembly comprising a plurality of conductive electrodes, wherein the electrodes are arranged on the carrier such that the electrodes are in contact with the skin of the body during use, and wherein the electrodes are arranged such that the electrodes receive physiological electrical signals from the body in order to enable monitoring of the membrane potential of one or more muscles in the body.

[0011] A sleeve that can be worn on a user's limb is known from US 2020 / 0297279 A1. The sleeve can be used to detect the shape, position and movement of the limb and the user's biometrics.

[0012] A disadvantage of the sensors known from DE 37 03 458 A1 and DE 69 1 17 861 T2 is that the orientation of the photodiode and the phototransmitter relative to one another is dependent on the size of the finger received in the sensor. This results in a disadvantageous signal-to-noise ratio. Furthermore, in order to avoid long-term effects, such as pinching points on the user's finger, the position of the sensor must be changed regularly, which in the case of the sensor according to DE 69 1 17 861 T2 requires the flexible element to be loosened and completely replaced. As a result, the operating costs of such sensors are disadvantageously increased. Summary of the invention

[0013] The object of the present invention is to provide an oxygen saturation sensor which at least partially does not have these disadvantages and, in particular, an oxygen saturation sensor whose measuring properties and user comfort are improved.

[0014] These and other objects are achieved by the oxygen saturation sensor according to the invention.

[0015] The further embodiments, the description and the drawings provide advantageous designs and further details of the invention.

[0016] According to the present invention, an oxygen saturation sensor is provided. The oxygen saturation sensor comprises a textile base structure extending in the direction of a longitudinal axis, wherein the base structure has a cross-sectional shape that can be reset and changed, so that the oxygen saturation sensor can be fixed on a measurement site. The oxygen saturation sensor also comprises a light emitting diode and a radiation detector. The light emitting diode and the radiation detector are received in or at the base structure and are arranged in a cross-sectional plane of the base structure.

[0017] In the context of the present invention, an oxygen saturation sensor is understood to be a sensor for determining the saturation of blood with respect to oxygen (oxygen saturation). The oxygen saturation sensor is preferably designed as a pulse oximeter oxygen saturation sensor.

[0018] A basic structure is understood to be a structure which is suitable for receiving a light-emitting diode and a radiation detector and which can be fixed to a measuring site. A measuring site is understood to be a part of the human body suitable for measuring the oxygen saturation, for example a finger, an arm or a leg.

[0019] According to the invention, the basic structure is designed as a textile basic structure, which is understood to mean that the basic structure is designed as a planar or spatial textile fabric, that is, it comprises one or more planar or spatial textile fabrics or consists of such planar or spatial textile fabrics. The basic structure can in principle have any shape, but preferably the basic structure is designed rotationally symmetrically with respect to the longitudinal axis.

[0020] A reversibly variable cross-sectional shape is understood to mean that the basic structure has a cross-sectional shape suitable for receiving the measuring part, wherein the basic structure or its cross-sectional shape can be changed from its original shape by the action of a force, in particular can be enlarged, and wherein the basic structure exerts a restoring force in the deformed state in order to change the cross-sectional shape from the deformed state to the original shape, in particular to reduce it towards the original shape. In other words, the textile basic structure is elastically deformable. As a result, if the measuring part has a larger cross-sectional size than in its original shape, the basic structure produces a clamping effect on or at the measuring part that has a fixing effect. As a result, due to the reversibly variable cross-sectional shape, the oxygen saturation sensor can be reversibly fixed to the measuring part.

[0021] In case the base structure has a cross-sectional shape of non-uniform design along the longitudinal axis, the cross-sectional shape refers to the cross-sectional shape existing in the cross-sectional plane in which the LEDs and the radiation detectors are arranged.

[0022] The basic structure can define a hollow body extending along the longitudinal axis, which has a reversibly variable cross-sectional shape at least in the cross-sectional plane. For example, the hollow body can be designed as a cylinder, a truncated cone or a hyperboloid, that is, it is limited by a cylinder, a truncated cone or a hyperboloid as a limiting surface.

[0023] The oxygen saturation sensor may have one or more light emitting diodes (hereinafter also referred to as an LED or as a plurality of LEDs). The oxygen saturation sensor preferably has a red LED and / or an infrared LED. A red LED is understood to be an LED that is set to emit light with a wavelength in the range of 610 nanometers to 760 nanometers, preferably with a wavelength of 660 nanometers. An infrared LED is understood to be an LED that is set to emit light with a wavelength exceeding 760 nanometers, preferably in the range of 800 nanometers to 1000 nanometers, particularly preferably with a wavelength of 950 nanometers.

[0024] If the oxygen saturation sensor has a plurality of LEDs, these LEDs may be designed as part of a common component or as structurally separate components.

[0025] A radiation detector is understood to be a structural element that is designed to measure electromagnetic radiation (i.e. light). Such radiation detectors are also called photodetectors. For example, the radiation detector can be designed as a photoresistor, a photodiode, a phototransistor, a CCD sensor and / or a CMOS sensor. The radiation detector is preferably designed as a photodiode.

[0026] The LED and / or the radiation detector may have one or more elements for influencing the beam path in the direction towards or from the LED and / or in the direction towards or from the radiation detector, for example one or more lenses and / or one or more reflectors.

[0027] Preferably, the longitudinal axis, the LED (or each of the LEDs) and the radiation detector (or each of the radiation detectors) enclose an angle (or respectively enclose an angle) between 90 and 270 degrees, particularly preferably between 90 and 180 degrees.

[0028] Preferably, the oxygen saturation sensor according to the invention is designed as a disposable oxygen saturation sensor. Alternatively, it is preferred that the oxygen saturation sensor is designed as a reusable oxygen saturation sensor, wherein the reusable oxygen saturation sensor can be easily conditioned, i.e. cleaned and sterilized, due to the textile base structure. For example, cleaning in a washing machine is possible.

[0029] Preferably, the cross-sectional shape is re-variable, in particular re-enlarged, by compression of the base structure in the direction of the longitudinal axis. In this way, the handling of the oxygen saturation sensor can be improved, because the oxygen saturation sensor can be increased in diameter by compression in order to be placed on the measuring site, and the oxygen saturation sensor can thus be placed on the measuring site without tensile or compressive stresses at the measuring site. By subsequently relieving the load on the base structure, the cross-sectional shape is reduced again due to the resetting effect and thus produces a clamping effect at the measuring site that has a fixing effect.

[0030] In a particularly preferred design, the cross-sectional shape is resettably changed by compression of the base structure in the direction of the longitudinal axis, so that the cross-sectional shape (at least in the region of the LED and the radiation detector, i.e. at least in the cross-sectional plane) is essentially circular both in the compressed state and in the uncompressed state.

[0031] Alternatively, the cross section is preferably changed in a resetting manner by a deformation of the base structure transversely to the longitudinal axis, in particular in the cross-sectional plane. In this way, the handling of the oxygen saturation sensor can be improved, because the oxygen saturation sensor can be pushed onto the measuring site, for example onto a finger, and this displacement causes a deformation of the base structure transversely to the longitudinal axis, which leads to a resetting of the cross-sectional shape and thus to a clamping effect that has a fixing effect. Thus, an additional manual deformation of the base structure for placement on the measuring site can be advantageously omitted.

[0032] According to the invention, the base structure comprises a plurality of flexurally elastic yarns, wherein at least a portion of the yarns are selected from the group consisting of plastic yarns, glass yarns and carbon yarns.

[0033] A yarn is understood to be a linear textile structure comprising one or more fibers. A flexurally elastic yarn is preferably designed as a monofilament yarn. Thus, a plastic yarn is understood to be a yarn comprising one or more plastic fibers or consisting of one or more plastic fibers. A glass yarn is understood to be a yarn comprising one or more glass fibers or consisting of one or more glass fibers. A carbon yarn is understood to be a yarn comprising one or more carbon fibers or consisting of one or more carbon fibers.

[0034] In this way, the elastic deformability of the base structure is advantageously increased and the fixation of the oxygen saturation sensor to the measuring site can thus be improved.

[0035] Particularly preferably, the basic structure consists of a plurality of flexurally elastic yarns. In this way, the elastic deformability of the basic structure can be further increased.

[0036] Particularly preferably, the base structure comprises a plurality of flexurally elastic yarns and a plurality of compliant yarns.

[0037] By combining flexibly elastic yarns and compliant yarns, a base structure with high elastic deformability can be provided, which at the same time has improved wearing comfort, since compliant yarns, i.e. soft yarns, generally lie more comfortably on the patient's skin. In addition, the properties of the base structure can thus be better adapted to the conditions of use of the oxygen saturation sensor.

[0038] Preferably, the material of the plastic yarn is selected from the group consisting of polypropylene, polyurethane and polyethylene.

[0039] Plastics from these groups have advantageous mechanical properties and are at the same time low in cost.

[0040] According to the invention, the base structure is configured as a braided tube, a wound tube, a woven tube or a knitted tube.

[0041] The control solution is a basic structure which is elongated along a longitudinal axis and which provides the above-described hollow body for receiving the measuring site in the interior and which has essentially the shape of a cylinder, a (possibly double) truncated cone or a hyperbola.

[0042] A braided tube, a wound tube, a woven tube and / or a knitted tube is understood to mean a base structure obtained by means of a braiding method, a winding method, a braiding method or a knitting method. In this case, the tube can be obtained not only by providing one or more planar textile structures and then joining them to form a tube, but also by providing a spatial textile structure (possibly formed by joining sub-elements). The above-mentioned production methods can also be used in combination to obtain the tube. For example, a knitted tube can be provided with embedded yarns in such a way that the embedded yarns produce a braided structure. In addition, for example, the braided structure can have entrained yarns.

[0043] Braided, wound, braided and / or knitted tubes offer the advantage that they are easy to produce and have a high deformability along the longitudinal axis and / or transversely to the longitudinal axis.

[0044] Preferably, a basic structure can be provided in such a way that its cross-sectional shape is circular both in the compressed state and in the uncompressed state. In particular, when the basic structure changes shape due to compression, the cross-sectional shape undergoes a central extension. In other words, the angular relationship between the LED and the radiation detector is not affected by the operation of the basic structure (for example, compression). As a result, even if the shape of the basic structure changes differently (for example, due to the reception of a finger or a large finger), the orientation between the light-emitting diode and the radiation detector is advantageously kept constant. As a result, it can be ensured in this way that the measurement characteristics of the oxygen saturation sensor are essentially constant for each measurement site and are therefore improved. An example of such a tube is also known as an extension sleeve or as a finger clamp (Chinese finger cuff).

[0045] Particularly preferably, the basic structure is designed as a knitted tube in such a way that the cross section can be changed in a resetting manner by a deformation of the basic structure transversely to the longitudinal axis.

[0046] The tube is preferably single-walled or multi-walled, for example double-walled.

[0047] A single-walled design offers the advantage of simple manufacturability. A multi-walled design offers the advantage of increased restoring forces.

[0048] The multi-walled structure can be realized, for example, by rolling up the pipe itself several times.Optionally, the butt edges formed by rolling up can be joined, for example, joined by welding.

[0049] Preferably, the basic structure is designed to be open on one side or open on both sides.

[0050] In the case of a base structure that is open on one side, the shielding of the interior of the oxygen saturation sensor against stray light can advantageously be improved compared to a base structure that is open on two sides.

[0051] In the case where the base structure is open on both sides, the cleanability of the oxygen saturation sensor can be improved compared to a base structure that is open on one side, as long as the oxygen saturation sensor is not designed as a disposable oxygen saturation sensor.

[0052] Preferably, the oxygen saturation sensor may further include a light-proof structure surrounding at least a portion of the base structure and / or at least a portion of the plurality of elastic yarns to reduce light incidence from the environment of the oxygen sensor toward the radiation detector.

[0053] By light-impermeable structure is meant a structure designed to reduce the transmission of light through the base structure.

[0054] In this way, the signal-to-noise characteristics of the oxygen saturation sensor and thus its measurement characteristics can be improved.

[0055] In a preferred configuration, the light-impermeable structure may be configured as a second layer, which at least partially, preferably completely, surrounds the base structure on the outer side of the base structure.

[0056] For example, such a structure can be formed integrally with the base structure, for example in the form of a coating of the base structure, or can be designed as a separate layer, for example as a covering of the base structure, in particular as a knitted textile covering.

[0057] Another possible solution for providing a light-proof structure is that the basic structure is partially made of elastic yarns and partially made of light-reducing yarns. Thus, at least a portion of the plurality of elastic yarns is surrounded by light-reducing yarns on at least one side as a light-proof structure. For example, a certain number of elastic yarns can be embedded in a structure knitted from light-reducing yarns, or the basic structure can be woven from elastic yarns and light-reducing yarns, for example, in such a way that a portion or all of the weft or warp threads are formed from light-reducing yarns.

[0058] Particularly preferably, the basic structure is designed as a two-part knitted tube with a first inner tube and a second outer tube. The first inner tube can include a plurality of yarns that ensure good wearing comfort, and the second outer tube can include a plurality of yarns that provide a light-tight structure.

[0059] Preferably, the LEDs and / or the radiation detectors are accommodated in or on the base structure by welding, in particular spot welding, gluing, embedding or sewing.

[0060] In this way, LEDs and / or radiation detectors may be connected to the base structure without adversely affecting the deformability of the base structure.

[0061] Preferably, the LEDs and / or the radiation detectors are accommodated as part of one or more flexible printed circuit boards in or on the base structure.

[0062] In this way, LEDs and / or radiation detectors may be connected to the base structure without adversely affecting the deformability of the base structure.

[0063] Particularly preferably, LED and / or radiation detector are received in or at the basic structure as a part of one or more flexible circuit boards by welding, especially spot welding, bonding or stitching. In another variant, the circuit board is braided into or woven into the basic structure as a part of the basic structure.

[0064] Preferably, the oxygen saturation sensor further comprises a fixing means which is provided for fixing the oxygen saturation sensor on or at the measuring site.

[0065] In this way, the fixing force of the oxygen saturation sensor on the measuring site can be further increased.

[0066] For example, the fastening means can be designed as a strap with Velcro or as a rubber ring.

[0067] The oxygen saturation sensor may also have other elements, such as elements for data processing and communication. For example, the oxygen saturation sensor may have a control unit, such as a circuit or microprocessor for controlling an LED and a radiation detector. For example, the control unit may be designed to receive and process the measurement signal of the radiation detector and / or store it in a storage unit. In addition, for example, the oxygen saturation sensor may have a circuit for controlling and / or reading the LED and / or the radiation detector. For example, these circuits may have one or more amplifiers, resistors, capacitors, filters, A / D converters, etc. The circuit may be designed as part of the control unit or as a separate structural element. In addition, for example, the oxygen saturation sensor may have a data technology interface, such as a wired or wireless interface, for sending and / or receiving data. For example, the measurement signal of the radiation detector and / or the measurement data stored in the storage unit may be transmitted to an external receiver by means of the interface. In addition, for example, the oxygen saturation sensor may have an energy source, such as a battery or a battery, for providing electrical energy for the operation of the oxygen saturation sensor. In addition or alternatively, the oxygen saturation sensor may have an energy technology (wired or wireless) interface for receiving electrical energy for the operation of the oxygen saturation sensor. All of the above-mentioned elements can be designed as part of a common circuit board, for example, as part of the above-mentioned flexible circuit board or multiple circuit boards.

[0068] Preferably, the oxygen saturation sensor has a color marking indicating the purpose of use with respect to its use purpose. For example, a reusable oxygen saturation sensor can be designed with a first color, while a non-reusable oxygen saturation sensor can be designed with a second color different from the first color. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] These and other features and advantages are also apparent from the following description of the drawings, in which:

[0070] Figure 1a An embodiment of an oxygen saturation sensor according to the present invention is shown in longitudinal section;

[0071] Figure 1b An embodiment of an oxygen saturation sensor according to the invention is shown in a cross-sectional view through a cross-sectional plane;

[0072] Figure 2a An embodiment of an oxygen saturation sensor according to the present invention is shown in a front view before deformation;

[0073] Figure 2b An embodiment of an oxygen saturation sensor according to the present invention is shown in a front view after deformation;

[0074] Figure 3a Another embodiment of the oxygen saturation sensor according to the present invention is shown in a front view before deformation;

[0075] Figure 3b Another embodiment of the oxygen saturation sensor according to the present invention is shown in a front view after deformation;

[0076] Figure 4 An embodiment of a braided tube according to the invention is shown in a detailed view in a top view;

[0077] FIG5 shows an embodiment of a braided tube according to the invention in a detail view in longitudinal section;

[0078] Figure 5b An embodiment of a braided tube according to the invention is shown in a detail view in longitudinal section, which has a light-tight structure;

[0079] Figure 5c Another embodiment of a braided tube according to the invention is shown in a detail view in longitudinal section, which has a light-tight structure;

[0080] Figure 6 Another embodiment of the oxygen saturation sensor according to the present invention is shown in a front view, which has a fixing device;

[0081] Figure 7 Another embodiment of an oxygen saturation sensor according to the invention is shown in a front view in longitudinal section. DETAILED DESCRIPTION

[0082] exist Figures 1a to 3b and Figure 6 to Figure 7 An example of an oxygen saturation sensor 100 according to the present invention is shown in FIG.

[0083] Each oxygen saturation sensor 100 according to the invention comprises a textile base structure 10 extending in the direction of the longitudinal axis L. For example, the base structure 10 according to the invention can be designed in a cylindrical shape, as in the case of the Figure 1a , Figure 1b , Figure 3a , Figure 3b , Figure 6 and Figure 7 In another embodiment, the base structure 10 is designed as a hyperboloid, as shown in Figure 2a , Figure 2b Other shapes of the base structure 10 are also possible.

[0084] The base structure 10 of each embodiment has a cross-sectional shape that can be reset and changed, so that the oxygen saturation sensor 100 can be fixed on the measurement site M. The measurement site M is Figure 1a As schematically shown in FIG. 1 , the measuring part may be, for example, a finger of a user.

[0085] Preferably, the cross-sectional shape of the base structure 10 is reversibly changed by compression of the base structure 10 in the direction of the longitudinal axis L. Figure 2a and Figure 3a In the two embodiments shown in FIG. 1 , each shows an oxygen saturation sensor 100 in a basic state, ie before deformation. If the base structure 10 is compressed, ie deformed, along the longitudinal axis L (as indicated by the arrow pair P1-P1, respectively), the cross-sectional shape changes, in particular the cross-sectional shape increases (see FIG. 1 ). Figure 2b or Figure 3b In this state, the oxygen saturation sensor 100 can be placed particularly carefully on the measuring site M. By reducing the load on the repositionable basic structure 10 , the basic structure is fixed on the measuring site M by the clamping force.

[0086] Alternatively, in each embodiment, it is preferred that the cross-sectional shape is reversibly changed by deformation of the base structure 10 transversely to the longitudinal axis L. This is an alternative in accordance with Figure 2a and Figure 3a If the base structure 10 is deformed transversely to the longitudinal axis L, as indicated by the arrow pair P2-P2, the cross-sectional shape changes, in particular the cross-sectional shape becomes larger (see Figure 2b or Figure 3b ). By means of the restoring force acting due to the deformation, the base structure 10 is fixed on the measuring point M by the clamping force.

[0087] Each oxygen saturation sensor 100 according to the present invention further includes a light emitting diode 20 (LED) and a radiation detector 30, as shown in FIG. Figure 1a and Figure 1b Each oxygen saturation sensor 100 according to the present invention may have more than one LED 20 and / or more than one radiation detector 30 .

[0088] The LED 20 and the radiation detector 30 are received in or on the base structure 10 and are arranged in a cross-sectional plane E of the base structure 10, as shown in FIG. Figure 1a and Figure 1b Can be seen in.

[0089] LED 20 and radiation detector 30 can (as in the case of Figure 1a , Figure 1b) is arranged with its outer surface flush with the boundary surface of the hollow body provided by the base body 10, or in a design not shown, extends beyond the boundary surface of the hollow body (partially or completely) into the hollow body, that is, not flush with the boundary surface.

[0090] The receiving mode and method of the LED 20 and the radiation detector 30 in or at the base body 10 can be designed basically arbitrarily. However, in all embodiments, it is preferred that the LED 20 and / or the radiation detector 30 are received in or at the base structure 10 (indirectly or directly) by welding, bonding or sewing. In another variant, it is preferred that the LED 20 and / or the radiation detector 30 is embedded in a pocket portion of the base structure 10 designed for this purpose.

[0091] Furthermore, in all exemplary embodiments, the LED 20 and / or the radiation detector 30 are preferably accommodated in or on the base structure 10 as part of one or more flexible printed circuit boards 40, such as in Figure 1a , Figure 1b In the example shown, the circuit board 40 is embedded in the base structure 10, but it is also feasible to arrange the circuit board 40 flush with the boundary surface of the hollow body or to arrange the circuit board 40 on the outer side of the base body 10. The circuit board 40 can be received in or at the base structure 10 by welding, bonding, embedding or sewing, so that the LED 20 and / or the radiation detector 30 are indirectly received in or at the base structure 10 by welding, bonding, embedding or sewing.

[0092] According to the present invention, the base structure 10 can be constructed as a braided tube, a wound tube, a woven tube and / or a knitted tube. An example of a braided tube is Figure 4 1 is shown as a cut-out detail view in a top view toward the base structure 10. The braided tube is formed from a plurality of yarns G, which can be constructed in the same or different ways.

[0093] Although according to Figure 4 The fabric is presented with warp and weft threads running at right angles to one another, but angle relationships different from this are possible between the warp and weft threads or between the threads that form the tube in each case. In this regard, it has been recognized within the scope of the invention that the more the angle between the two thread directions deviates from 90°, the higher the deformability of the basic structure 10. In particular, in the case of a braided tube, angles that deviate significantly from 90° can be achieved.

[0094] according to Figure 4 The braided tube Figure 5a The figure is shown in a longitudinal section as a cut-out detail view.

[0095] According to the present invention, the base structure 10 comprises a plurality of bending elastic yarns G, wherein at least a portion of the yarns G are selected from the group consisting of plastic yarns, glass yarns and carbon yarns. The material of the plastic yarn is preferably selected from the group consisting of polypropylene, polyurethane and polyethylene.

[0096] As this Figures 1a to 3b As shown in FIG, the tube formed by the basic structure 10 can be constructed as a single wall. Figure 6 It is shown in FIG. 1 that the tube formed by the basic structure 10 can be designed with multiple walls.

[0097] Furthermore, in all embodiments possible and in Figures 1a to 3a It is shown that the basic structure 10 can be designed to be open on both sides. Not shown but possible in all embodiments is that the basic structure 10 is designed to be open on one side. In this case, one of the end sides of the basic structure 10 can be closed by a separate element or by a corresponding closed configuration of the textile basic structure 10 during the production method.

[0098] In all embodiments, it is preferred that the oxygen saturation sensor 100 has a light-proof structure Sa, Sb, which surrounds at least a portion of the basic structure 10 and / or at least a portion of the plurality of flexurally elastic yarns G in order to reduce the incidence of light from the environment of the oxygen sensor 100 in the direction of the radiation detector 30 .

[0099] exist Figure 5b An embodiment of such a light-proof structure Sa is shown in . Here, the light-proof structure Sa is designed as a second layer Sa, which at least partially, preferably completely surrounds the base structure 10. For example, such a layer Sa can be provided as an integral component of the base structure 10, such as as a coating, or as a separate layer, such as as a covering.

[0100] exist Figure 5c Another embodiment of the light-proof structure Sb is shown in FIG. Here, the basic structure 10 includes not only the bending elastic yarn G but also the light-reducing yarn Sb. In the example shown, the tube is a fabric that includes not only the light-reducing yarn Sb but also the bending elastic yarn G.

[0101] In some embodiments, it is preferred that the oxygen saturation sensor 100 additionally has a fixing device 50, which is provided for fixing the oxygen saturation sensor 100 on or at the measuring site M. Figure 6An example of such an oxygen saturation sensor 100 is shown in FIG. The fixing device 50 may be integrally connected to the oxygen saturation sensor 100, for example, sutured to the oxygen saturation sensor. Alternatively, the fixing device 50 may be provided separately from the oxygen saturation sensor 100 and connected to the oxygen saturation sensor to fix the oxygen saturation sensor 100 on the measurement site M. For example, the fixing device 50 may be a rubber ring or a band provided with Velcro, which may be wrapped around the oxygen saturation sensor 100.

[0102] Preferred and Figure 6 It is shown in FIG. 1 that the tube formed by the basic structure 10 can be constructed with multiple walls, for example by rolling the tube 10 on itself. This results in a basic structure 10 having multiple walls 10a, 10b. Figure 6 As shown in FIG. , such a multi-walled base structure 10 may be configured to receive a circuit board 40 therebetween.

[0103] List of reference numerals:

[0104] 10 Infrastructure

[0105] 10a First wall

[0106] 10b Second wall

[0107] 20 LEDs

[0108] 30 Radiation Detectors

[0109] 40 Circuit Boards

[0110] 50Fixed Devices

[0111] 100 oxygen saturation sensor

[0112] E cross-sectional plane

[0113] G,Gs yarn

[0114] L Longitudinal axis

[0115] M Measurement location

[0116] P1,P1 arrow

[0117] Sa, Sb opaque structure

Claims

1. An oxygen saturation sensor (100), comprising: - a textile base structure (10) extending in the direction of the longitudinal axis (L); wherein the base structure (10) has a cross-sectional shape that can be reset and changed, so that the oxygen saturation sensor (100) can be fixed on the measuring part (M); - a light emitting diode (20); and - a radiation detector (30); wherein the light-emitting diode (20) and the radiation detector (30) are received in or on the base structure (10) and are arranged in a cross-sectional plane (E) of the base structure (10); Wherein, the base structure (10) is configured as a braided tube, a wound tube, a woven tube and / or a knitted tube; Therein, the base structure (10) comprises a plurality of flexurally elastic yarns (G), wherein at least a portion of the yarns (G) are selected from the group consisting of plastic yarns, glass yarns and carbon yarns.

2. The oxygen saturation sensor (100) according to claim 1, in, The cross-sectional shape is resettably changed by compression of the base structure (10) in the direction of the longitudinal axis (L); or The cross-sectional shape is changeable in a resettable manner by deformation of the base structure (10) transversely to the longitudinal axis (L).

3. The oxygen saturation sensor (100) according to claim 1 or 2, in, The material of the plastic yarn is selected from the group consisting of polypropylene, polyurethane and polyethylene.

4. The oxygen saturation sensor (100) according to claim 1 or 2, in, The tube can be single-walled or multi-walled.

5. The oxygen saturation sensor (100) according to claim 1 or 2, in, The basic structure (10) is designed to be open on one side or open on both sides.

6. The oxygen saturation sensor (100) according to claim 1 or 2, It also has a light-proof structure (Sa, Sb) which surrounds at least a portion of the base structure (10) and / or at least a portion of the plurality of flexurally elastic yarns (G) so as to reduce the incidence of light from the environment of the oxygen sensor (100) in the direction of the radiation detector (30).

7. The oxygen saturation sensor (100) according to claim 1 or 2, in, The light emitting diode (20) and / or the radiation detector (30) are received in or at the base structure (10) by welding, bonding, embedding or sewing.

8. The oxygen saturation sensor (100) according to claim 1 or 2, in, The light-emitting diode (20) and / or the radiation detector (30) is accommodated in or on the basic structure (10) as part of one or more flexible printed circuit boards (40).

9. The oxygen saturation sensor (100) according to claim 1 or 2, A fixing device (50) is also provided, which is configured to fix the oxygen saturation sensor (100) on or at the measuring site (M).

Images