Percutaneous oxygen or carbon dioxide probe for surface monitoring

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a percutaneous oxygen or carbon dioxide probe for face monitoring, which comprises a percutaneous probe for collecting oxygen or carbon dioxide released by human skin; the gas sensor comprises an O2 sensor or a CO2 sensor and is used for detecting oxygen or carbon dioxide released by human skin; the pump is used for enabling oxygen or carbon dioxide released by the skin of the human body to circulate in the gas path pipe connected with all the parts, so that the oxygen is detected by the O2 sensor or the carbon dioxide is detected by the CO2 sensor; the electromagnetic valve is used for switching gas path modes; the standard gas cylinder is used for calibrating the O2 sensor or the CO2 sensor; wherein the percutaneous probe is a face monitoring type percutaneous probe; through the arrangement of components such as the surface monitoring type percutaneous probe, the technical defect that an existing probe can achieve point monitoring but cannot achieve surface monitoring is overcome, and the surface monitoring type percutaneous probe has the advantages of being simple in structure, simple and convenient to operate, low in cost of probe consumables and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a transcutaneous oxygen or carbon dioxide probe for surface monitoring. Background Art

[0002] The transcutaneous oxygen / carbon dioxide partial pressure probe measures the oxygen / carbon dioxide molecules overflowing from the tissue by placing heated electrodes directly on the surface of the skin, thereby monitoring the oxygen / carbon dioxide combination of local tissue cells and blood and the oxygen / carbon dioxide perfusion of the blood. The transcutaneous oxygen / carbon dioxide partial pressure has a good correlation with the oxygen / carbon dioxide partial pressure in blood gas analysis. Therefore, the transcutaneous oxygen / carbon dioxide partial pressure probe can be an alternative tool for invasive arterial blood gas analysis, providing a strong basis for the early identification of microcirculatory disorders and shock. As a non-invasive, continuous monitoring and simple-to-operate monitoring method, it has replaced invasive blood gas operations to a certain extent in clinical practice. Transcutaneous oxygen / carbon dioxide partial pressure monitoring plays an important role in the diagnosis and treatment of diabetic foot, and has the potential to further explore clinical value. However, after months of field visits to many hospitals in Guangdong Province, this application found that the electrochemical monitoring method (point detection) used in its transcutaneous oxygen / carbon dioxide partial pressure probe has defects such as complex probe structure, cumbersome operation process and high cost of probe consumables. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a surface monitoring transcutaneous oxygen or carbon dioxide probe, aiming to achieve surface monitoring of the transcutaneous oxygen / carbon dioxide partial pressure probe, so as to simplify the probe structure and operation process, thereby reducing the cost of probe consumables.

[0004] In order to achieve the above technical objectives, the utility model provides a transcutaneous oxygen or carbon dioxide probe for surface monitoring, comprising:

[0005] A transcutaneous probe (6) for collecting oxygen or carbon dioxide released from human skin;

[0006] A gas sensor, including an O2 sensor (1) or a CO2 sensor (2), for detecting oxygen or carbon dioxide released from human skin;

[0007] A pump (3) for causing oxygen or carbon dioxide released from human skin to circulate in the air circuit tube connecting the various components, so that oxygen is detected by the O2 sensor (1) or carbon dioxide is detected by the CO2 sensor (2);

[0008] A solenoid valve (4), used for switching the gas circuit mode;

[0009] A standard gas cylinder (5), used for calibrating the O2 sensor (1) or the CO2 sensor (2);

[0010] Wherein, the percutaneous probe (6) is a surface monitoring type percutaneous probe.

[0011] The utility model is further configured as follows: the percutaneous probe (6) comprises a collection air chamber, a thermistor and a heating wire.

[0012] The utility model is further configured as follows: the air collection chamber is a foot cover made of polyethylene material.

[0013] The utility model is further configured as follows: a gas circuit switch joint is provided on the gas collection chamber.

[0014] The utility model is further configured to include a pressure sensor (7), a hand valve (8) and a flow controller (9).

[0015] The utility model is further configured as follows: the standard gas cylinder (5) is a 400ppm oxygen standard gas cylinder.

[0016] The utility model is further configured as follows: the solenoid valve (4) is a three-way solenoid valve, and the number of the solenoid valve is two.

[0017] The utility model is further configured to include a pressure gauge (10), wherein the pressure gauge (10) is arranged between the percutaneous probe (6) and the pump (3).

[0018] The utility model is further configured as follows: the pressure sensor (7) is arranged between the standard gas cylinder (5) and the hand valve (8), and the flow controller (9) is arranged between the hand valve (8) and the solenoid valve (4).

[0019] The utility model is further configured as follows: the CO2 sensor (2) is arranged on a side of the pump (3) away from the pressure gauge (10), the O2 sensor (1) is arranged on a side of the CO2 sensor (2) away from the pump (3), and the O2 sensor (1) is connected to the solenoid valve (4) via an air pipe.

[0020] To sum up, compared with the prior art, the utility model provides a surface monitoring transcutaneous oxygen or carbon dioxide probe, which overcomes the technical defect that the existing probe can realize point monitoring but not surface monitoring through the arrangement of components such as the surface monitoring transcutaneous probe, and has the beneficial effects of offline monitoring, simple probe structure, simple operation process and low cost of probe consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a transcutaneous oxygen or carbon dioxide probe for surface monitoring provided in this embodiment;

[0023] Figure 2 A schematic diagram of the working principle of a transcutaneous oxygen or carbon dioxide probe for surface monitoring provided in this embodiment;

[0024] Figure 3 A schematic diagram of a practical example of a transcutaneous oxygen or carbon dioxide probe for surface monitoring provided in this embodiment.

[0025] Reference numerals: 1, O 22 Sensor; 2. CO 22 Sensor; 3. Pump; 4. Solenoid valve;

[0026] 5. Standard gas cylinder; 6. Percutaneous probe; 7. Pressure sensor; 8. Hand valve; 9. Flow controller;

[0027] 10. Pressure gauge; 11. Atmosphere. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] In the description of the present invention, it should be noted that the terms "front", "rear", "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described above can be combined with each other as long as they do not conflict with each other.

[0032] In a first aspect of this embodiment, a transcutaneous oxygen or carbon dioxide probe for surface monitoring is provided, such as Figure 1 As shown, including:

[0033] A transcutaneous probe (6) for collecting oxygen or carbon dioxide released from human skin;

[0034] In this embodiment, the percutaneous probe (6) includes a collection air chamber, a thermistor (not shown) and a heating wire (not shown). The collection air chamber is a foot cover made of polyethylene (PE) material, and an air circuit switch connector (not shown) is provided on the collection air chamber.

[0035] It should be noted that, in the specific implementation process, the thermistor and the heating wire are used to heat the human skin at the monitoring site to increase its temperature; according to the characteristics of the capillary response to heat, the blood flow in it increases, and the capillary bed at the heated site increases. At this time, gas exchange occurs between the arterial blood and the subepidermal capillaries, and oxygen or carbon dioxide diffuses out of the capillaries. The gas circuit switch connector is used to export the oxygen or carbon dioxide in the collection chamber.

[0036] It should be further explained that, in some embodiments, the material and shape of the collection chamber can be selectively set according to actual conditions and are not specifically limited here.

[0037] Gas sensors, including O 22 Sensor (1) or CO 22 A sensor (2) for detecting oxygen or carbon dioxide released from human skin;

[0038] It should be noted that, in the specific implementation process, the gas sensor may include O 22 Sensor (1) or CO 22 One of the sensors (2) may also be a combination of the above two sensors, which is not specifically limited here.

[0039] The pump (3) is used to circulate the oxygen or carbon dioxide released by the human skin in the gas line connecting the various components, so that the oxygen is converted into O 22 The sensor (1) detects or causes carbon dioxide to be converted into CO 22 The sensor (2) detects;

[0040] It should be noted that, in the specific implementation process, when the mechanical power provided by the pump (3) circulates the oxygen or carbon dioxide in the gas line to achieve a gas concentration balance in the entire gas line, the oxygen and carbon dioxide can be respectively O 22 Sensor (1) or CO 22 The sensor (2) detects.

[0041] A solenoid valve (4), used for switching the gas circuit mode;

[0042] Standard gas cylinder (5) for O 22 Sensor (1) or CO 22 The sensor (2) is calibrated;

[0043] In this embodiment, the solenoid valve (4) is a three-way solenoid valve, and the number of the solenoid valves is two; the standard gas cylinder (5) may be a 400 ppm oxygen standard gas cylinder.

[0044] It should be noted that, in the specific implementation process, the three-way solenoid valve can set the gas circuit in the gas circuit pipe to a disconnection mode, a flushing mode and a measurement mode. The flushing mode is to flush out the high concentration of oxygen in the gas circuit pipe through a standard gas cylinder (5) with an oxygen concentration of 400ppm; the measurement mode is to allow the gas to circulate in the closed gas circuit pipe so that the oxygen and carbon dioxide released by the human skin can reach a dynamic balance in the entire gas circuit pipe.

[0045] It should be noted that, in the specific implementation process, the O 22 Sensor (1) or CO 22 The sensor (2) is calibrated so that the entire process can be fully automated, which is of great significance for simplifying the operation process.

[0046] It should be further explained that, in some embodiments, the models and quantities of the solenoid valve (4) and the standard gas cylinder (5) can be selectively set according to actual needs, and are not specifically limited here.

[0047] Wherein, the percutaneous probe (6) is a surface monitoring type percutaneous probe.

[0048] It should be noted that, in the specific implementation process, compared with the electrochemical method in the prior art, this embodiment adopts a surface monitoring method to perform transcutaneous oxygen / carbon dioxide partial pressure, which greatly simplifies the structure of the probe.

[0049] Furthermore, this embodiment also includes a pressure sensor (7), a hand valve (8) and a flow controller (9).

[0050] Furthermore, this embodiment also includes a pressure gauge (10), which is arranged between the percutaneous probe (6) and the pump (3).

[0051] In this embodiment, the pressure sensor (7) is arranged between the standard gas cylinder (5) and the hand valve (8), and the flow controller (9) is arranged between the hand valve (8) and the solenoid valve (4).

[0052] In this embodiment, CO 22 The sensor (2) is located on the side of the pump (3) away from the pressure gauge (10). 22 The sensor (1) is located at the CO 22 The side of the sensor (2) facing away from the pump (3), O 22 The sensor (1) is connected to the solenoid valve (4) via an air line pipe.

[0053] It should be noted that, in some embodiments, the positional relationship between the components can be selectively arranged according to actual conditions, with the purpose of facilitating operation and reducing costs, and no specific limitation is made here.

[0054] In a second aspect of this embodiment, an example of the working principle of a transcutaneous oxygen or carbon dioxide probe for surface monitoring is provided.

[0055] like Figure 2 As shown, the pressure gauge (10), pump (3), CO 22 Sensor (2), O 22 The sensor (1), the solenoid valve (4) and the pressure sensor (7) can all be electrically connected to the control board via a cable harness, and the control board can be electrically connected to the industrial control touch screen via a UART serial interface.

[0056] The third aspect of this embodiment provides a practical example of a transcutaneous oxygen or carbon dioxide probe for surface monitoring.

[0057] like Figure 3 As shown, after the foot is covered with a PE foot cover, waterproof tape and glycerin can be applied to achieve sealing. When in use, first, close the gas circuit switch joint and cover the foot with a PE foot cover, apply glycerin on the sealing part, and then seal it with a rubber band or waterproof tape; secondly, connect the percutaneous oxygen circuit tube to the PE foot cover gas circuit joint, and replace the gas in the foot cover with low-concentration oxygen / carbon dioxide; finally, when the gas is balanced, the percutaneous oxygen / carbon dioxide partial pressure can be continuously monitored.

[0058] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A transcutaneous oxygen or carbon dioxide probe for surface monitoring, characterized in that: include: A transcutaneous probe (6) for collecting oxygen or carbon dioxide released from human skin; A gas sensor, comprising an O2 sensor (1) or a CO2 sensor (2), for detecting oxygen or carbon dioxide released from human skin; A pump (3) for circulating oxygen or carbon dioxide released from human skin in the air circuit tube connecting the various components, so that oxygen is detected by the O2 sensor (1) or carbon dioxide is detected by the CO2 sensor (2); A solenoid valve (4), used for switching the gas circuit mode; A standard gas cylinder (5), used for calibrating the O2 sensor (1) or the CO2 sensor (2); Wherein, the percutaneous probe (6) is a surface monitoring type percutaneous probe.

2. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to claim 1, characterized in that: The percutaneous probe (6) comprises a collection air chamber, a thermistor and a heating wire.

3. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to claim 2, characterized in that: The air collection chamber is a foot cover made of polyethylene material.

4. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to claim 2 or 3, characterized in that: The gas collection chamber is provided with a gas circuit switch joint.

5. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to any one of claims 1 to 3, characterized in that: It also includes a pressure sensor (7), a hand valve (8) and a flow controller (9).

6. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to any one of claims 1 to 3, characterized in that: The standard gas cylinder (5) is a 400ppm oxygen standard gas cylinder.

7. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to any one of claims 1 to 3, characterized in that: The solenoid valves (4) are three-way solenoid valves, and there are two of them.

8. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to claim 1, characterized in that: It also comprises a pressure gauge (10), wherein the pressure gauge (10) is arranged between the percutaneous probe (6) and the pump (3).

9. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to claim 5, characterized in that: The pressure sensor (7) is arranged between the standard gas cylinder (5) and the hand valve (8), and the flow controller (9) is arranged between the hand valve (8) and the solenoid valve (4).

10. The transcutaneous oxygen or carbon dioxide probe for surface monitoring according to claim 8, characterized in that: The CO2 sensor (2) is arranged on a side of the pump (3) away from the pressure gauge (10), the O2 sensor (1) is arranged on a side of the CO2 sensor (2) away from the pump (3), and the O2 sensor (1) is connected to the solenoid valve (4) via an air pipe.

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