Wearable blood oxygen detection sleeve

Abstract

The invention relates to a wearable blood oxygen detection sleeve, which belongs to the technical field of blood oxygen detectors and comprises a wrist strap, a detection unit and a light condensing component. In the vertical direction, the wrist strap is provided with a mounting groove penetrating through the body, the detection unit is located in the mounting groove and connected with the wrist strap, the pressure of the detection unit on the wrist is observed from the mounting groove, and a bonding layer is arranged on the inner side of the wrist strap and used for stably wearing the wrist strap on the wrist; the light condensation assembly covers the detection unit, abuts against the wrist and is used for preventing light emitted by the detection unit from being scattered from the mounting groove, the pasting layer guarantees wearing comfort, stable contact between the detection unit and the skin can be achieved, the problem of pressure injury caused by excessive pressure on the skin is solved, and the application range is wide. The use of the condensation assembly effectively reduces light scattering and improves the collection efficiency of light signals, so that the measurement accuracy of the oxyhemoglobin saturation and the stability of data detection are enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of blood oxygen detectors, and particularly relates to a wearable blood oxygen detection sleeve. Background Art

[0002] In the field of medical monitoring, blood oxygen saturation is one of the important indicators for evaluating a patient's respiratory function and blood circulation status. Traditional blood oxygen detection usually relies on a pulse oximeter finger clip worn on the finger, which indirectly calculates the blood oxygen saturation by measuring the light signal transmitted or reflected by the fingertip. The measurement principle of the pulse oximeter is based on the light absorption characteristics of hemoglobin. In addition, as the device is used for a longer time, its accuracy and reliability may gradually decrease.

[0003] However, with the in-depth clinical practice, some problems have also emerged in the use of traditional pulse oximeter finger clips. Especially for patients with restlessness and unclear consciousness, since they cannot effectively control their behaviors, the traditional finger clip design often makes it difficult to ensure stable wearing, resulting in discontinuous detection data and errors, which brings troubles to the diagnosis and treatment of medical staff. Especially for critically ill patients with poor peripheral circulation and cold fingertips, the finger pulse blood oxygen often cannot be measured, and the change of the patient's blood oxygen saturation cannot be observed in time; while the fingertip blood oxygen probe is inconvenient for the daily activities of conscious patients such as self-feeding and washing.

[0004] In addition, for patients who need to wear restraint gloves, there is another potential risk in the use of traditional pulse oximeter finger clips. Due to the wrapping of the gloves, it is difficult for medical staff to directly observe the state of the finger skin. When the pulse oximeter finger clip presses on the finger for a long time, it may cause pressure injuries such as skin redness, blisters or even necrosis, increasing the pain of the patient.

[0005] Therefore, there is a need for a wearable blood oxygen detection sleeve that can be stably worn and continuously detect blood oxygen indicators. Summary of the Invention

[0006] To solve the above problems existing in the prior art, the present invention provides a wearable blood oxygen detection sleeve to solve the problem that the existing fingertip oximeter is not stably worn and easily falls off, thereby resulting in unstable detection data.

[0007] The object of the present invention can be achieved by the following technical solutions:

[0008] A wearable blood oxygen detection sleeve includes a wristband and a detection unit. The wristband is provided with a through installation groove, and the detection unit is arranged at the notch of the installation groove close to the wrist. The detection unit is used to detect the blood oxygen value, and the fitting degree between the detection unit and the wrist is observed from the other notch of the installation groove;

[0009] The condensing component covers the detection unit. The condensing component is located between the detection unit and the wristband and is used to prevent the detection light of the detection unit from scattering out of the installation groove.

[0010] Preferably, the condensing component includes a barrel-shaped light cover and a light-transmitting layer. The barrel-shaped light cover is sleeved on the detection unit so that the detection light of the detection unit propagates within the contour of the barrel-shaped light cover. The light-transmitting layer is disposed on the bottom surface of the barrel-shaped light cover and is used to paste the barrel-shaped light cover to the skin.

[0011] Preferably, the light-transmitting layer is a transparent hydrogel with a refractive index ranging from 1.39 to 1.40.

[0012] Preferably, the light cover is made of polytetrafluoroethylene.

[0013] Preferably, the inner side of the light cover is provided with a slope that gradually inclines outward from top to bottom, and the slope is used to guide the light to irradiate the skin.

[0014] Preferably, the angle range of the intersection point of the slope and the midline of the detection unit is 0.5° - 1.5°.

[0015] Preferably, a telescopic part is further provided at the top of the light cover, and the telescopic part is fixedly connected to the detection unit.

[0016] Preferably, a connecting line is further included. The connecting line is connected to the detection unit and is used to transmit the data detected by the detection unit to the monitor.

[0017] Preferably, a buckle is further provided at one end of the wristband. The buckle is used to connect the two ends of the wristband. A plurality of pin holes are provided at the end of the wristband opposite to the installation buckle, and the pin holes cooperate with the buckle to adjust the wearing size of the wristband.

[0018] Preferably, an adhesive layer is provided on the inner side of the wristband, and the adhesive layer is used to stably wear the wristband on the wrist. The wristband is made of nylon material.

[0019] The beneficial effects of the present invention are as follows:

[0020] The wrist fixation design and pressure dispersion structure of the present application improve the wearing stability of the blood oxygen detection set. The adhesive layer design not only ensures the wearing comfort but also enables stable contact between the detection unit and the skin, solving the problem of pressure injury caused by excessive compression of the skin. The use of the condensing component effectively reduces light scattering, improves the acquisition efficiency of optical signals, and thus enhances the measurement accuracy of blood oxygen saturation and the stability of data detection. Description of the Drawings

[0021] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 Schematic diagram of the structure of the blood oxygen detection set provided in an embodiment of the present invention;

[0023] Figure 2 For Figure 1 Schematic diagram of the enlarged structure at A in

[0024] Figure 3 Schematic diagram of the installation structure of the light condensing component provided in an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of slope reflection provided in an embodiment of the present invention;

[0026] Legend: 1. Wristband; 11. Installation groove; 12. Adhesive layer; 2. Detection unit; 3. Light condensing component; 31. Light cover; 311. Slope; 32. Translucent layer; 33. Telescopic part; 4. Buckle. Detailed implementation manners

[0027] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, with reference to the accompanying drawings and preferred embodiments, clearly explain the specific implementation manners, structures, features and their effects of the present invention.

[0028] As Figures 1-4 shown, a wearable blood oxygen detection set includes a wristband 1, a detection unit 2 and a light condensing component 3; in the vertical direction, the wristband 1 is provided with an installation groove 11 penetrating the body, the detection unit 2 is located in the installation groove 11 and is connected to the wristband 1, and the pressure of the detection unit 2 on the wrist is observed from the installation groove 11. An adhesive layer 12 is provided on the inner side of the wristband 1, and the adhesive layer 12 is used to stably wear the wristband 1 on the wrist;

[0029] The light condensing component 3 covers the detection unit 2 and abuts against the wrist, and is used to prevent the light emitted by the detection unit 2 from scattering from the installation groove 11;

[0030] Wearing and fixing: The user wraps the wristband 1 around the wrist, and uses the adhesive layer 12 on the inner side of the wristband 1 to achieve a stable fit. The design of the adhesive layer 12 not only ensures the comfort of wearing, but also enables the stable contact between the detection unit 2 and the skin, avoiding pressure injuries caused by excessive compression of the skin, and also ensuring that the blood oxygen detection set will not easily slip off under different activity states, thus solving the problem that the existing fingertip blood oxygen meter is easy to fall due to unstable wearing. Medical staff can also observe the contact state between the detection unit 2 and the skin in the groove, such as color change and indentation depth, to evaluate the wearing pressure in real time and avoid excessive compression;

[0031] Function of Detection Unit 2: Detection Unit 2, which typically includes a light-emitting diode (LED) and a photodetector, is installed in the mounting slot 11 of the wristband 1. The LED emits light of a specific wavelength that penetrates the skin and reaches the capillary network, while the photodetector is responsible for receiving the light reflected after being absorbed by the blood to detect the blood oxygen content;

[0032] Since no pressure is applied to the detection unit 2 to make it close to the skin surface, but the detection component is gently attached to the skin by means of adhesive, the rotation of the wrist makes it easier for the light emitted by the LED to diffuse from all sides during the detection process instead of directly irradiating the skin surface;

[0033] Therefore, the focusing component 3 tightly covers the detection unit 2 and is in direct contact with the wrist. The detection unit 2 is fixed to the wrist rather than the fingers through the wristband 1, using the wrist bone support structure to provide a stable anchor point to avoid excessive loosening of the device due to patient restlessness or wrist flexion. The medical-grade silicone or hydrogel adhesive layer 12 on the inside of the wristband 1 fits tightly with the skin, with an adhesion of ≥1.5N / cm 2 Even if the patient moves vigorously, the displacement of the wristband 1 will not cause the detection unit to deviate from the detection area; the focusing component 3 is used to guide and focus the light emitted by the LED, reduce the scattering of light at the edge of the installation groove 11, and ensure that as much light as possible can penetrate the skin and be effectively captured by the photosensitive detector, which not only improves the utilization rate of the light signal, but also enhances the accuracy and stability of the measurement.

[0034] In summary, the wrist fixing design and pressure dispersion structure of the present application improve the wearing stability of the blood oxygen detection sleeve. The adhesive layer 12 design not only ensures the wearing comfort, but also enables stable contact between the detection unit 2 and the skin, solving the problem of pressure damage caused by excessive pressure on the skin; the use of the focusing component 3 effectively reduces light scattering and improves the efficiency of light signal collection, thereby enhancing the measurement accuracy of blood oxygen saturation and the stability of data detection. Compared with traditional fingertip oximeters, the wearable blood oxygen detection sleeve is more convenient and comfortable, avoiding the inconvenience of frequently changing fingers for measurement.

[0035] In one embodiment, the focusing assembly 3 includes a barrel-shaped light shield 31 and a light-transmitting layer 32. The barrel-shaped light shield 31 is mounted on the detection unit 2, and the light-transmitting layer 32 is arranged at the bottom of the barrel-shaped light shield 31 and connected to the adhesive layer 12. The barrel-shaped light shield 31 is used to reduce the scattering of the detection unit 2 and acts as a barrier to block or limit the scattering of light in non-target directions. When light penetrates the skin tissue and is reflected back, the barrel-shaped light shield 31 can ensure that the reflected light returns to the blood oxygen detection unit 2 in a more concentrated and orderly manner, so that the blood oxygen detection unit 2 can receive a clearer and higher-intensity reflected light signal, thereby improving the accuracy and reliability of blood oxygen detection.

[0036] In one embodiment, the light-transmitting layer 32 has a double-sided adhesive structure for bringing the detection unit 2 into contact with the skin. The light-transmitting layer 32 is a transparent hydrogel with a refractive index ranging from 1.39 to 1.40, which is used to ensure that when the light emitted by the light-emitting diode passes through the light-transmitting layer 32, excessive refraction occurs, causing the light to deviate from the predetermined detection area. The refractive index range of the light-transmitting layer 32 from 1.39 to 1.40 is extremely close to the refractive index of human skin, which ranges from 1.38 to 1.44. This can avoid repeated refraction of light when passing through the light-transmitting layer 32 and human skin, eliminating multiple unnecessary refractions that may occur at the interface between the light-transmitting layer 32 and the skin, ensuring the continuity and linearity of light during penetration, and greatly improving the light utilization rate and the accuracy of signal detection.

[0037] In one embodiment, since the installation groove reserves a space for observing the degree of fit between the detection unit and the skin, when the wrist moves, natural light from the outside or non-detection light emitted by other monitoring instruments nearby is likely to affect the detection accuracy of the detection unit. Therefore, a barrel-shaped light shield is needed to absorb and isolate the detection light and non-detection light, thereby ensuring the accuracy and precision of the detection data. Specifically, the barrel-shaped light shield 31 is made of polytetrafluoroethylene. Specifically, the inner surface of the barrel-shaped light shield is micro-structured to form a specific optical texture. For example, a nano-scale grating structure is used. By adjusting the period and depth of the grating, selective reflection and scattering of light with different wavelengths can be achieved. For the detection light at 660 nm and 940 nm, by optimizing the grating parameters, the reflectivity at these wavelengths can reach more than 90%. For other non-detection wavelengths, such as visible light in the range of 400 - 600 nm and some near-infrared wavelengths of light, through the scattering and absorption effects of the grating, the reflectivity is reduced to less than 10%. The barrel-shaped light shield 31 tightly wraps around the blood oxygen detection unit 2 or a similar optical sensor, forming a closed or semi-closed optical environment. When the light-emitting diode (LED) emits light to penetrate the skin for physiological parameter detection, the barrel-shaped light shield 31 made of polytetrafluoroethylene can efficiently absorb stray non-detection target light from the surrounding environment.

[0038] In one embodiment, since there is only one emission point in the detection unit, when the detection light is emitted from the detection unit and irradiates the skin, the light that can effectively irradiate the skin is limited, and the irradiation path from the emission point to the skin is an expanding path. The vascular area corresponding to the irradiation area of the detection unit is limited. When the wrist moves and causes the detection unit to deviate or form an inclination angle with the wrist, the detection light irradiating the target blood vessel decreases. When the light capacity required for blood oxygen detection cannot be reached, problems such as discontinuous or interrupted detection are likely to occur. Therefore, a slope 311 is arranged on the inner side of the barrel-shaped light cover 31 to gradually incline outward from top to bottom, aiming to optimize the transmission path of light from the light-emitting diode (LED) to the skin. When the detection unit deviates, the detection light emitted by the detection unit will re-reflect the detection light deviating from the target detection area to the target area under the action of the slope. Specifically, when the detection unit generates an offset or an inclination angle, the problem that the detection light as a whole deviates from the blood vessel detection area will occur, which will in turn lead to a decrease in the detection light irradiated to and reflected by the blood vessel. At this time, under the action of the slope, the irradiated light deviating from the blood vessel detection area can be re-reflected to the blood vessel detection area, thereby increasing the capacity of the area irradiated to the blood vessel. The geometric shape of the slope 311 is designed based on the matching principle of the incident angle and the reflection angle of light. When the scattered light contacts the slope 311, according to Snell's Law and the law of reflection, the light is redirected to the skin area, that is, the detection light deviating from the main optical path is reflected back to the skin surface after hitting the slope 311, forming a secondary penetration path and increasing the effective optical path. Therefore, the efficient recovery and directional focusing of the scattered light significantly improve the blood oxygen signal quality and detection accuracy, while reducing power consumption and enhancing environmental adaptability.

[0039] In one embodiment, due to the presence of the adhesive layer, the offset range of the detection unit is 5 - 10°. When the detection unit deviates, the detection light emitted by it will also deviate accordingly. The effective area that the detection light can irradiate and be absorbed in the normal state is 20 - 30 mm 2 , while the vascular area of the wrist is 15 - 25 mm 2 , when the detection light deviates with the detection unit, the detection light will deviate from the blood vessel detection area, resulting in a decrease in the detection light that can be absorbed. Therefore, the angle between the slope 311 and the midpoint of the detection unit 2 is set at 1° - 3.5°. When the LED emits light, these lights first irradiate the slope 311 on the inner side of the barrel-shaped light cover 31, and then are reflected from the slope 311 to the air or the light-transmitting layer 32 at the same incident angle. Under the action of the slope 311, the scattered light emitted by the light-emitting diode can be corrected to the path consistent with the main irradiation light and irradiate the skin surface under the action of the slope 311. Specifically, since the detection unit 2 is pasted on the skin surface by the light-transmitting layer 32;

[0040] In the normal state, the center line of the detection unit is aligned with the center line of the wrist blood vessel detection area, and the detection light can accurately irradiate the blood vessels. At this time, the effective area that the detection light can irradiate and be absorbed in the normal state is 25 mm 2 , and the blood vessel area of the wrist is between 15 - 25 mm 2 , the detection light can be fully absorbed by the blood vessels, and the device can accurately obtain the light absorption signal of the blood vessels, and then calculate accurate physiological parameters; for example, if the detection unit deviates 7° to one side, at this time the detection light will also deviate from the blood vessel detection area accordingly, and the effective light area that could originally irradiate the blood vessels decreases, and only about 15 mm 2 or so, resulting in a weakened detection signal and affecting the accuracy of the detection result;

[0041] When the angle is less than 1°, when the angle between the intersection point of the slope 311 and the detection unit 2 is less than 1°, the inclination degree of the slope is too small, and the incident angle of the light when it enters the slope is relatively small. According to the law of reflection, the reflection angle will also be relatively small, which results in that the direction change of the light after reflection is not obvious enough. The detection light that originally deviates from the target area may still not be able to accurately return to the target area (such as the blood vessel area) after being reflected by the slope, reducing the light recovery efficiency and being unable to effectively increase the light capacity irradiated on the blood vessel area, thus affecting the intensity and quality of the blood oxygen signal;

[0042] When the angle is greater than 3.5°, the incident angle of the light when it enters the slope is large. According to the optical principle, a large incident angle will cause more complex scattering phenomena of the light on the slope. The detection light that originally deviates from the target area, after being reflected by the slope, directly passes through the detection area and during the propagation process, due to the longer scattering path, a lot of scattered light will be generated, and these scattered lights will be dispersed into the surrounding environment, resulting in a reduction in the effective light irradiated on the target area (such as the blood vessel area);

[0043] Therefore, only when the angle of the slope is between 1 - 3.5°, the detection light reflected by the slope can be reflected back to the detection area again, thereby ensuring the full absorption of the detection light by the detection area.

[0044] In an embodiment, a telescopic part 33 is further provided at the top of the barrel-shaped light cover 31. The telescopic part 33 is fixedly connected to the detection unit 2. The telescopic part 33 is used to improve the fit of the barrel-shaped light cover 31 to the wrist. The setting of the telescopic part 33 enables the barrel-shaped light cover 31 to adapt to the movement of the wrist as much as possible when the wrist moves, which helps to reduce light leakage and improve the measurement accuracy of the photoelectric sensor for physiological parameters such as blood oxygen saturation and heart rate.

[0045] In one embodiment, it further includes a connecting wire, which is connected to the detection unit 2. The connecting wire is used to transmit the data detected by the detection unit 2 to the monitor. The detection unit 2 is connected to an external monitor through a connecting wire. The inside of the connecting wire contains conductive materials, which are used to transmit physiological data such as oxygen saturation collected by the detection unit 2. The detection unit 2 is responsible for collecting data in real time and transmitting these data to the monitor through the connecting wire for analysis and display, capable of continuously monitoring the physiological state of the patient.

[0046] In one embodiment, a buckle 4 is further provided at one end of the wristband 1. The buckle 4 is used to connect the two ends of the wristband 1. A number of pin holes are provided at the end of the wristband 1 opposite to the end where the buckle 4 is installed. The pin holes cooperate with the buckle 4 to adjust the wearing size of the wristband 1. According to the size of the user's wrist, a suitable pin hole can be selected to lock with the buckle 4, so as to adjust the tightness and wearing length of the wristband 1, ensuring both the stability of wearing and providing a personalized size adjustment space.

[0047] In one embodiment, an adhesive layer is provided on the inner side of the wristband. The adhesive layer is used to firmly wear the wristband on the wrist. The adhesive layer can resist external forces such as tensile force and shear force generated during wrist movement, so that the wristband is firmly worn on the wrist. At the same time, the material of the adhesive layer usually has a certain elasticity and flexibility, which can adapt to the bending and movement of the wrist and avoid the decrease of adhesion due to skin stretching; the wristband is made of nylon material, and the nylon material has the effects of high strength, wear resistance, light weight and economy. When the blood oxygen detection sleeve is used as a disposable item, it can also reduce costs. At the same time, the nylon material is soft and wear-resistant, which will neither cause harm to the patient nor be easily broken free, and can ensure the stable wearing of the detection unit 2.

[0048] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to be equivalent embodiments within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A wearable blood oxygen detection sleeve, characterized in that, It includes a wristband and a detection unit. The wristband is provided with a through installation groove, and the detection unit is arranged at the notch on the side of the installation groove close to the wrist. The detection unit is used to detect the blood oxygen value, and the fitting degree between the detection unit and the wrist is observed from the other notch of the installation groove; The light condensing component covers the detection unit. The light condensing component is located between the detection unit and the wristband and is used to prevent the detection light of the detection unit from scattering out of the installation groove.

2. The wearable blood oxygen detection set according to claim 1, characterized in that, The light condensing component includes a barrel-shaped light cover and a light-transmitting layer. The barrel-shaped light cover is sleeved on the detection unit, so that the detection light of the detection unit propagates within the contour of the barrel-shaped light cover; the light-transmitting layer is arranged on the bottom surface of the barrel-shaped light cover, and the light-transmitting layer is used to paste the barrel-shaped light cover to the skin.

3. The wearable blood oxygen detection sleeve according to claim 2, characterized in that The light-transmitting layer is a transparent hydrogel with a refractive index range of 1.39 - 1.

40.

4. A wearable blood oxygen detection sleeve according to claim 1, characterized in that, The light cover is made of polytetrafluoroethylene.

5. The wearable blood oxygen detection set according to claim 4, characterized in that, The inner side of the light cover is provided with a slope that gradually inclines outward from top to bottom, and the slope is used to guide the light to irradiate the skin.

6. The wearable blood oxygen detection set according to claim 5, wherein The angle range of the intersection point of the slope and the midline of the detection unit is 0.5° - 1.5°.

7. The wearable blood oxygen detection set according to claim 2, characterized in that, The top of the light cover is further provided with a telescopic part, and the telescopic part is fixedly connected to the detection unit.

8. A wearable blood oxygen detection sleeve according to claim 1, wherein, It further includes a connecting wire, and the connecting wire is connected to the detection unit. The connecting wire is used to transmit the data detected by the detection unit to the monitor.

9. The wearable blood oxygen detection set according to claim 1, characterized in that, One end of the wristband is further provided with a buckle. The buckle is used to connect the two ends of the wristband. The wristband is provided with a plurality of pin holes at the end relative to the installed buckle, and the pin holes cooperate with the buckle to adjust the wearing size of the wristband.

10. A wearable blood oxygen detection sleeve according to claim 1, characterized in that, The inner side of the wristband is provided with an adhesive layer, and the adhesive layer is used to firmly wear the wristband on the wrist; the wristband is made of nylon material.

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