A tissue oxygen saturation micro-monitoring probe

Abstract

The utility model provides a kind of tissue oxygen saturation micro monitoring probe, the utility model relates to severed finger replantation blood supply monitoring technical field, tissue oxygen saturation micro monitoring probe, comprising: probe body, two groups of optical fiber components are built-in in probe body, optical fiber component is used for light out and light in, and two pieces of astigmatism lens one and two pieces of condenser lens one are sealedly installed on the surface of probe body by opening, and astigmatism lens one and condenser lens one are respectively corresponding with the light outlet end, light inlet end of optical fiber component;Connecting wire, chip is built-in in connecting wire;The utility model has the beneficial effect that: it solves the existing probe due to wrapping sheet larger and influence postoperative observation;Emitting part and photoelectric detection device are burned after energization due to continuous light emission and heat and cause skin burn;And as well as the problem of high cost of probe use.

Description

Technical Field

[0001] This utility model relates to the field of blood supply monitoring technology for finger replantation, and specifically to a miniature probe for monitoring tissue oxygen saturation. Background Technology

[0002] A tissue oxygen saturation micro-monitoring probe is a miniaturized medical device or sensor used to monitor the oxygen content in human tissue blood. It uses 700nm red light and 900nm near-infrared light as incident light sources to shine on the human tissue bed (such as the abdomen, thigh, etc.). Two different photodetectors are placed at the other end or side of the tissue. The two different photodetectors receive light signals of the two wavelengths respectively. The photodetectors can detect the intensity of the light, thereby obtaining the light intensity information after passing through the tissue at the two different wavelengths, to calculate the hemoglobin concentration and blood oxygen saturation, enabling continuous monitoring of tissue oxygen saturation after surgery.

[0003] like Figure 1 As shown, the existing tissue oxygen saturation micro-monitoring probe includes a wrapping sheet 1, a wire 2, and a connector 3. The wrapping sheet 1 has a built-in chip, on which are integrated a red LED 11, an infrared LED 12, a photodetector 13, and a photodetector 2 14 that are electrically connected. The red LED 11 and the photodetector 13 are electrically connected via wires, and the infrared LED 12 and the photodetector 2 14 are electrically connected via wires.

[0004] This type of probe has the following problems: First, the large size of the wrapping sheet 1 will affect postoperative observation; Second, the device is fixed to the surface of the tissue being tested during use. The red LED-11, infrared LED-12, photodetector-13, and photodetector-214 will all emit light and heat continuously after being powered on. Prolonged wear will generate a certain amount of heat, which may cause skin burns and increase the local temperature, resulting in monitoring errors; Third, the probe is a disposable probe. In order to ensure that the probe is sterile before use, it usually needs to be discarded after use. The red LED-11, infrared LED-12, photodetector-13, and photodetector-214 in the probe must also be discarded, so the probe has a high cost of use.

[0005] Therefore, there is an urgent need for a miniature probe for monitoring tissue oxygen saturation to solve the aforementioned problems. Utility Model Content

[0006] To address the aforementioned technical problems in existing technologies, a miniature tissue oxygen saturation monitoring probe is provided, which solves the problems of existing probes affecting postoperative observation due to the large size of the wrapping sheet; skin burns caused by continuous light emission and heat generation of the light-emitting and photodetector components after being powered on; and high probe usage costs.

[0007] The purpose and effects of this utility model are achieved by the following specific technical means:

[0008] A miniature probe for monitoring tissue oxygen saturation includes:

[0009] The probe body has two sets of optical fiber assemblies built in. The optical fiber assemblies are used for light output and light input. Two astigmatic lenses and two condensing lenses are installed on the surface of the probe body through an opening. The astigmatic lenses and condensing lenses correspond to the light output end and light input end of the optical fiber assemblies, respectively.

[0010] The connecting line has a built-in chip, on which two light-emitting elements and two photodetectors are electrically connected. Each light-emitting element is equipped with a second condensing lens, and each photodetector is equipped with a second astigmatic lens. An optical fiber is fixed to one side of each of the second condensing lens and the second astigmatic lens.

[0011] The connector is fixed to the connecting line, with one side of the connector fixedly connected to the optical fiber and the other side detachably connected to the optical fiber assembly.

[0012] A further preferred embodiment: the optical fiber assembly includes optical fiber one, optical fiber two, and two optical fiber couplers, with the two optical fiber couplers respectively installed at the output end of optical fiber one and the input end of optical fiber two.

[0013] A further preferred embodiment: the two light-emitting elements include a red LED and an infrared LED, and the photodetector includes a photodetector and a photodetector. The red LED, infrared LED, photodetector, and photodetector are all integrated on a chip, and the red LED, infrared LED, photodetector, and photodetector correspond to the four optical fibers.

[0014] A further preferred embodiment: four connectors 2 are fixed on the connector head, and the four connectors 2 are respectively connected to four optical fibers 3. Connector 1 is fixed at the end of each optical fiber 1 and optical fiber 2 near the connector head, and connector 1 is inserted into the connector 2 that is compatible with it.

[0015] A further preferred embodiment is characterized in that the probe body is approximately 1 cm wide and 3-6 mm thick.

[0016] A further preferred embodiment: the probe body is made of shape memory polymer.

[0017] A further preferred embodiment: a high-temperature resistant sleeve is fixed to one end of the probe body near the connecting wire, and a sealing sleeve is sealed between the high-temperature resistant sleeve and the outside of the connecting wire.

[0018] A further preferred embodiment: the high-temperature resistant sleeve and the outer wall of the connecting wire are both integrally formed with a limiting ring, and the inner wall of the sealing sleeve has two limiting grooves that match the limiting rings, and the limiting rings are embedded in the corresponding limiting grooves.

[0019] A further preferred embodiment: a second connector is fixed to the end of the connecting line away from the probe body, and the second connector is electrically connected to the chip.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This miniature tissue oxygen saturation monitoring probe achieves miniaturization, making it suitable for small tissues, confined spaces, and various areas of large tissues, facilitating doctors' postoperative observation of tissue blood supply.

[0022] 2. By using fiber optic components for light source transmission and feedback, the loss of the integrated circuit analyzer is reduced. The probe body is an optical element and does not generate heat, making it more comfortable for patients to wear. In addition, the fiber optic components are highly waterproof and can be washed, wiped, and plasma disinfected, which is conducive to cleaning and disinfection.

[0023] 3. The probe body is shaped and fixed by a temperature-regulating molding material (shape memory polymer), which fits the irregular surface and is physically fixed, increasing the stability of the probe fit and avoiding the peeling off of the adhesive and the skin irritation and difficulty in cleaning wounds caused by prolonged adhesive use.

[0024] 4. The probe body and connecting cable are easy to disassemble. The probe body in this application is made only by optical elements such as optical fiber assembly, astigmatic lens one and condensing lens one. The replacement cost of the probe body is low. The red light LED two, infrared light LED two, photodetector three and photodetector four in the connecting cable do not come into contact with the patient's skin and do not need to be replaced after each use.

[0025] 5. By using multiple probes, multiple fingers or multiple regions can be monitored at the same time. It is also suitable for monitoring free flaps and can be used for regional monitoring of large flaps. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of the tissue oxygen saturation monitoring probe in the background art of this utility model;

[0027] Figure 2 This is a schematic diagram of the front cross-sectional structure of the micro-monitoring probe for tissue oxygen saturation in an embodiment of this utility model;

[0028] Figure 3 This utility model Figure 2 A schematic diagram of the partial structure at point A;

[0029] Figure 4This utility model Figure 2 A schematic diagram of the local structure at point B;

[0030] Figure 5 This is a schematic diagram of the main structure of the micro-monitoring probe for tissue oxygen saturation in an embodiment of this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the micro-probe for monitoring tissue oxygen saturation worn on the amputated finger of a patient in an embodiment of this utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the micro-probe for monitoring tissue oxygen saturation worn on the patient's severed wrist in an embodiment of this utility model.

[0033] The diagram shows the following components: 1. Wrapper; 11. Red LED; 12. Infrared LED; 13. Photodetector; 14. Photodetector 1; 2. Wire; 3. Connector; 4. Probe body; 41. Fiber optic cable; 42. Fiber optic coupler; 43. Connector; 44. Astigmatism lens; 45. High-temperature resistant sleeve; 46. Concentrating lens; 47. Connecting wire; 5. Chip; 51. Red LED; 52. Infrared LED; 53. Photodetector 3; 54. Photodetector 4; 55. Fiber optic cable; 56. Concentrating lens; 57. Astigmatism lens; 58. Connector; 6. Sealing sleeve; 7. Limiting ring; 8. Connector; 9. Connector; 91. Detailed Implementation

[0034] Please see Figure 2-7 The embodiments of this utility model will be further described below;

[0035] like Figure 2-5As shown, a miniature tissue oxygen saturation monitoring probe is used for monitoring blood supply in finger replantation. It includes a probe body 4, a connecting wire 5, and a connector 9. The probe body 4 is approximately 1 cm wide and 3-6 mm thick, with its length adjusted according to the size of the human tissue. The probe body 4 is a flat strip, small in size, facilitating postoperative observation of blood supply in the patient's hand. Furthermore, to facilitate hand fixation of the probe body 4, it is made of a shape memory polymer, preferably polylactic acid (PLA). PLA is commonly used in the medical field. At around 50°C, PLA transitions from a glassy state to a highly elastic state, with molecular chains moving and the material gradually softening and deforming to some extent. This allows the deformed probe body 4 to be easily wrapped around the patient's hand according to its size, resulting in better fixation compared to existing probes. The probe body 4 has two sets of optical fiber assemblies built in. The optical fiber assemblies are used to conduct light sources. The optical fiber assemblies include optical fiber 1 41, optical fiber 2 42 and two optical fiber couplers 43. The two optical fiber couplers 43 are respectively installed at the light output end of optical fiber 1 41 and the light input end of optical fiber 2 42. The outer layer of optical fiber 1 41 and optical fiber 2 42 is coated with a hydrophobic material such as polytetrafluoroethylene to meet the IP67 waterproof requirement. The optical fiber couplers 43 at the light output end of optical fiber 1 41 and optical fiber 2 42 are used to export the light signal in optical fiber 1 41 and optical fiber 2 42. The optical fiber couplers 43 at the light output end of optical fiber 1 41 and optical fiber 2 42 are used to import external light sources. In addition, two astigmatic lenses 1 45 and two condensing lenses 1 47 are sealed and installed on the surface of the probe body 4 through an opening. The astigmatic lenses 1 45 and condensing lenses 1 47 correspond to the light output end and the light input end of the optical fiber assembly, respectively. The astigmatic lenses 1 45 are used to disperse the light source, which is beneficial for the light source at the probe emission point to illuminate a large area of ​​the patient's hand.

[0036] The connecting line 5 contains a built-in chip 51, on which two light-emitting elements and two photodetectors are electrically connected. Each light-emitting element is equipped with a condenser lens 57, and each photodetector is equipped with a diffuser lens 58. An optical fiber 56 is fixed to one side of each of the condenser lens 57 and diffuser lens 58. The two light-emitting elements include a red LED 52 and an infrared LED 53, which generate red light with a wavelength of 700nm and near-infrared light with a wavelength of 900nm, respectively. The photodetectors include a photodetector 54 and a photodetector 55, which are used to receive the aforementioned two wavelengths. The light signal, red LED 2 52, infrared LED 2 53, photodetector 3 54, and photodetector 4 55 are all integrated on the chip 51. The red LED 2 52, infrared LED 2 53, photodetector 3 54, and photodetector 4 55 correspond to four optical fibers 3 56 respectively. The photodetector can detect the light intensity, thereby obtaining the light intensity information after passing through the tissue at two different wavelengths. The chip 51 calculates the received red light intensity and infrared light intensity through photodetector 3 54 and photodetector 4 55, so that the tissue oxygen saturation monitor can calculate the hemoglobin concentration and blood oxygen saturation in the later stage, which can realize continuous monitoring of tissue oxygen saturation after surgery.

[0037] Connector 9 is fixed to connector 5, and one side of connector 9 is fixedly connected to fiber optic cable 3 56, while the other side is detachably connected to fiber optic assembly. Connector 9 has four connectors 2 91 fixed on it, and the four connectors 2 91 are respectively connected to four fiber optic cables 3 56. Connector 1 44 is fixed at the end of fiber optic cable 1 41 and fiber optic cable 2 42 near connector 9. Connector 1 44 is inserted into connector 2 91 that is compatible with it. The function of connector 9 is to realize the transmission of light between light and facilitate the disassembly of probe body 4 and connector 5, thereby facilitating the replacement of probe body 4 or connector 5.

[0038] like Figure 2 , 4 As shown in Figure 5, a high-temperature resistant sleeve 46 is fixed at one end of the probe body 4 near the connecting line 5. A sealing sleeve 7 is sealed between the high-temperature resistant sleeve 46 and the outside of the connecting line 5. The sealing sleeve 7 can prevent water or moisture from entering the connector 9. The outer walls of the high-temperature resistant sleeve 46 and the connecting line 5 are integrally formed with limit rings 8. The inner wall of the sealing sleeve 7 has two limit grooves that match the limit rings 8. The limit rings 8 are embedded in the corresponding limit grooves, which helps the sealing sleeve 7 to fit more stably on the high-temperature resistant sleeve 46 and the connecting line 5.

[0039] The end of the connecting wire 5 away from the probe body 4 is fixed with a connector 6. The connector 6 is electrically connected to the chip 51. The connector 6 is used to connect to the tissue oxygen saturation monitor to calculate and display the tissue oxygen saturation value and change curve.

[0040] The working principle is as follows:

[0041] like Figure 2-6 As shown, the probe body 4 is sterile in its initial state. Then it is heated to about 50°C, and the probe body 4 undergoes elastic deformation. The probe body 4 is then bent and wrapped around the patient's severed finger. When wrapping, medical staff can place a cold water bag on the outside of the probe body 4 to cool it down quickly. This helps the deformed probe body 4 to set quickly and also prevents the patient's skin from being burned by prolonged high temperature.

[0042] Next, plug connector 2.6 into the powered-on device. After being powered on, red LED 2.52 and infrared LED 2.53 will generate red light with a wavelength of 700nm and near-infrared light with a wavelength of 900nm, respectively. The optical signal transmission sequence is as follows: red LED 2.52 (the generated red light is focused by condenser lens 2.57) - fiber optic 3.56 (the red light focused by condenser lens 2.57 is taken into fiber optic 3.56) - connector 2.91 and connector 1.44 (used to connect the two optical fibers) - fiber optic 1.41 - fiber optic coupler at the output end of fiber optic 1.41 43 (Red light is emitted onto astigmatic lens 45, and the dispersed beam shines onto the patient's skin) - Fiber optic coupler 43 at the light inlet of fiber optic fiber 2 42 (Light penetrating the skin is focused by condenser lens 47 and enters fiber optic coupler 43) - Fiber optic fiber 2 42 (Light penetrating the skin is transmitted to the corresponding fiber optic fiber 2 42) - Connector 1 44 and Connector 2 91 (used to connect two optical fibers) - Fiber optic fiber 3 56 - Photodetector 3 54 (Red light in fiber optic fiber 3 56 is emitted onto astigmatic lens 2 58, and the dispersed beam shines onto the patient's skin) (Illuminated on photoelectric detector 3 54) - Chip 51 - Connector 2 6 - Tissue oxygen saturation monitor; Similarly, infrared LED 2 53 (the generated infrared light is focused by condenser lens 2 57) - Fiber optic 3 56 (the red light after being focused by condenser lens 2 57 is taken into fiber optic 3 56) - Connector 2 91 and Connector 1 44 (used to connect the two optical fibers) - Fiber optic 1 41 - Fiber optic coupler 43 at the light output end of fiber optic 1 41 (emits infrared light to astigmatism lens 1 45, and the astigmatized beam illuminates the patient's skin) - Fiber optic coupler 43 at the light inlet of fiber optic cable 2 42 (light penetrating the skin is focused by condenser lens 1 47 and enters fiber optic coupler 43) - Fiber optic cable 2 42 (light penetrating the skin is transmitted to the corresponding fiber optic cable 2 42) - Connector 1 44 and Connector 2 91 (used to connect the two fibers) - Fiber optic cable 3 56 - Photodetector 4 55 (red light in fiber optic cable 3 56 is emitted onto astigmatism lens 2 58, and the dispersed beam illuminates photodetector 4 55) - Chip 51 - Connector 2 6 - Tissue oxygen saturation monitor. The photodetector detects the light intensity, thereby obtaining the light intensity information after passing through the tissue at two different wavelengths. Chip 51 calculates the received red light intensity and infrared light intensity information through photodetector 3 54 and photodetector 4 55. Of course, this probe is also suitable for amputations (such as wrist amputations). Figure 7 As shown), the use of free flap monitoring, for example, involves wrapping multiple probes around multiple severed fingers, or between severed fingers and severed arms, to monitor large flaps in different areas. Multiple probes can be connected to a multi-channel expander via connector 26. The multi-channel expander is then connected to a tissue oxygen saturation monitor via wires, which can then calculate hemoglobin concentration and blood oxygen saturation, enabling continuous monitoring of postoperative tissue oxygen saturation.

[0043] Compared with existing technologies, the advantages of this application are:

[0044] 1. Miniaturization of the probe makes it suitable for small tissues, confined spaces, and various areas of large tissues, facilitating postoperative observation of tissue blood supply by doctors.

[0045] 2. By using fiber optic components for light source transmission and feedback, the loss of the integrated circuit analyzer is reduced. The probe body 4 is an optical element that does not generate heat, making it more comfortable for patients to wear. In addition, the fiber optic components are highly waterproof and can be washed, wiped, and disinfected by plasma, which is conducive to cleaning and disinfection.

[0046] 3. The probe body 4 is shaped and fixed by a temperature-regulating material (shape memory polymer), which fits the irregular surface and is physically fixed, increasing the stability of the probe fit and avoiding the peeling off of the adhesive and the skin irritation and difficulty in cleaning the wound due to long-term adhesive.

[0047] 4. The probe body 4 and the connecting cable 5 are easy to disassemble. The probe body 4 in this application is made only by optical elements such as optical fiber assembly, astigmatic lens 45 and condensing lens 47. The replacement cost of the probe body 4 is low. The red light LED 52, infrared light LED 53, photodetector 54 and photodetector 55 in the connecting cable 5 do not come into contact with the patient's skin and do not need to be replaced after each use.

[0048] 5. By using multiple probes, multi-finger or multi-region monitoring can be performed simultaneously. It is also suitable for monitoring free flaps and can be used for regional monitoring of large flaps.

Claims

1. A miniature probe for monitoring tissue oxygen saturation, characterized in that, include: The probe body (4) has two sets of optical fiber assemblies built in it. The optical fiber assemblies are used to conduct light sources. Two astigmatic lenses (45) and two condensing lenses (47) are installed on the surface of the probe body (4) through an opening. The astigmatic lenses (45) and condensing lenses (47) correspond to the light-emitting end and the light-incoming end of the optical fiber assembly, respectively. The connecting line (5) has a built-in chip (51). The chip (51) is equipped with two light-emitting elements and two photodetectors that are electrically connected to it. Each light-emitting element is equipped with a second condensing lens (57), and each photodetector is equipped with a second astigmatic lens (58). Each of the second condensing lens (57) and the second astigmatic lens (58) is fixed with an optical fiber (56) on one side. Connector (9), the connector (9) is fixed on the connecting line (5), and one side of the connector (9) is fixedly connected to the optical fiber three (56), and the other side is detachably connected to the optical fiber assembly.

2. The miniature probe for monitoring tissue oxygen saturation according to claim 1, characterized in that: The optical fiber assembly includes optical fiber one (41), optical fiber two (42) and two optical fiber couplers (43), with the two optical fiber couplers (43) respectively installed at the output end of optical fiber one (41) and the input end of optical fiber two (42).

3. The miniature probe for monitoring tissue oxygen saturation according to claim 1, characterized in that: The two light-emitting components include a red LED (52) and an infrared LED (53). The photodetector includes a photodetector (54) and a photodetector (55). The red LED (52), infrared LED (53), photodetector (54), and photodetector (55) are all integrated on a chip (51), and the red LED (52), infrared LED (53), photodetector (54), and photodetector (55) correspond to the four optical fibers (56) respectively.

4. The miniature probe for monitoring tissue oxygen saturation according to claim 2, characterized in that: Four connectors 2 (91) are fixed on the connector (9). The four connectors 2 (91) are respectively connected to four optical fibers 3 (56). One end of each optical fiber 1 (41) and optical fiber 2 (42) near the connector (9) is fixed with a connector 1 (44). The connector 1 (44) is inserted into the connector 2 (91) that is compatible with it.

5. A miniature probe for monitoring tissue oxygen saturation according to any one of claims 1-4, characterized in that: The probe body (4) is about 1 cm wide and 3-6 mm thick.

6. A miniature probe for monitoring tissue oxygen saturation according to claim 5, characterized in that: The probe body (4) is made of shape memory polymer.

7. The miniature tissue oxygen saturation monitoring probe according to claim 1, characterized in that: The probe body (4) is fixed with a high-temperature resistant sleeve (46) at one end near the connecting line (5), and a sealing sleeve (7) is sealed between the high-temperature resistant sleeve (46) and the outside of the connecting line (5).

8. A miniature probe for monitoring tissue oxygen saturation according to claim 7, characterized in that: The outer walls of the high-temperature resistant sleeve (46) and the connecting line (5) are integrally formed with a limiting ring (8). The inner wall of the sealing sleeve (7) has two limiting grooves that match the limiting ring (8). The limiting ring (8) is embedded in the corresponding limiting groove.

9. A miniature probe for monitoring tissue oxygen saturation according to claim 1, characterized in that: The end of the connecting line (5) away from the probe body (4) is fixed with a connector two (6), and the connector two (6) is electrically connected to the chip (51).

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