Pressure sensing device and arteriovenous cannulation device

Abstract

This application relates to a pressure sensing device and an arteriovenous cannulation device, comprising: a flow guide tube and a sensor module. Along the fluid flow direction, the flow guide tube includes a flow channel with a fluid inlet and a fluid outlet, configured to connect to the fluid flow path. The sensor module is connected to the flow guide tube and configured to communicate with the flow channel, enabling the sensor module to sense the pressure parameters of the fluid flowing through the flow channel; the sensor module is also configured to wirelessly transmit the pressure parameters to an external source. Using the solution of this application, the pressure parameters of the fluid flowing through the flow guide tube can be sensed and monitored in real time, further facilitating monitoring and installation.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a pressure sensing device and an arteriovenous catheterization device. Background Technology

[0002] Currently, the pressure gauges used in clinical practice are directly read by connecting the pressure gauge to the outside of the inflation tube. This method has a large reading error and cannot record data. Another type of pressure sensor is integrated into the vascular cannula, which uses a wired method to transmit data. This poses a risk that pulling the wire harness during clinical operation could dislodge the vascular cannula from the patient's injection site, thus affecting the doctor's treatment and, in severe cases, even endangering the patient's life.

[0003] Therefore, developing a pressure gauge suitable for arterial and venous applications that can avoid treatment risks is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] In view of the above problems, this application provides a pressure sensing device and an arteriovenous cannulation device, which are designed to continuously and dynamically monitor the fluid pressure of arteriovenous cannulas and meet the clinical need for wireless data transmission.

[0005] In a first aspect, this application provides a pressure sensing device, comprising: a flow guide tube and a sensor module, wherein, along the flow direction of the fluid, the flow guide tube includes a flow channel, the flow channel including a fluid inlet and a fluid outlet, the fluid inlet and the fluid outlet being configured to be connected to the passage through which the fluid flows. Furthermore, the sensor module is connected to the flow guide tube, the sensor module being configured to communicate with the flow channel, so that the sensor module senses the pressure parameter of the fluid flowing through the flow channel; the sensor module is configured to wirelessly transmit the pressure parameter to an external source.

[0006] In the technical solution of this application embodiment, the sensor module is disposed on the guide tube, and directly disposed on the guide tube, which can directly sense the pressure parameters of the fluid flowing through the flow channel of the guide tube. Furthermore, the fluid inlet and fluid outlet are configured to be connectable to the fluid flow path, so that the pressure sensing device of this application can be detachably installed in various medical environments, further improving the convenience of application of the pressure sensing device. During the fluid flow through the flow channel, the sensor module, which is directly connected to the flow channel, can sense and monitor the pressure parameters of the fluid in real time, facilitating installation and application.

[0007] In some embodiments, the sensor module includes: a chip, on which a wireless transmitting module and a battery for providing power are disposed; the chip also includes a sensing unit, at least a portion of which is directly connected to the flow channel; the wireless transmitting module is used to acquire the pressure parameters obtained by the sensing unit and wirelessly transmit the pressure parameters to a receiving unit. With the sensing unit configured, directly connecting a portion or all of the sensing unit's structure to the flow channel enables the acquisition of the fluid's pressure parameters.

[0008] In some embodiments, a first mounting groove is formed on the side wall of the guide pipe along its radial direction, and the sensor module is disposed in the first mounting groove. By adopting this solution, combined with the direct communication between the sensor module and the flow channel, the sensor module can be stably installed in the first mounting groove of the guide pipe, thereby enabling the sensor module to monitor the pressure parameters of the fluid flowing through the flow channel in real time.

[0009] In some embodiments, the first mounting groove includes a first bottom surface, and at least a portion of the structure on the first bottom surface is in communication with the flow channel. By employing the pressure sensing device of this solution, at least a portion of the structure on the first bottom surface is connected to the flow channel. As can be seen from the foregoing, the fluid in the flow channel can be directly connected to the sensor module via the connection point, thereby enabling the sensor module to acquire the pressure parameters of the fluid in real time, achieving a real-time monitoring effect.

[0010] In some embodiments, a through hole communicating with the flow channel is formed on the first bottom surface along the radial direction of the guide tube, and at least a portion of the structure of the sensing unit intersects with the through hole. By employing the pressure sensing device of this application, at least a portion of the structure of the sensing unit is configured to intersect with the through hole formed on the first bottom surface, so that the pressure sensing device can directly obtain the pressure parameters of the fluid flowing through the flow channel through the sensing unit, thereby ensuring the sensing efficiency of the pressure sensing device.

[0011] In some embodiments, the pressure sensing device further includes a first connector communicating with the fluid inlet, the first connector being configured to be detachably mounted on the fluid inlet. By providing the first connector to the pressure sensing device, it can be connected to the fluid inlet, thereby further enabling the pressure sensing device of this application to be installed in any desired passageway.

[0012] In some embodiments, the first connector is threadedly connected to the fluid inlet. Configuring the first connector and the fluid inlet as a threaded connection adapts to the operating environment of the medical device, facilitates disassembly and installation, and further ensures a secure connection at the connection points.

[0013] In some embodiments, the fluid inlet is configured as a Luer male connector, and the first connector has an internal thread adapted to the Luer male connector. A Luer male connector can be understood as a structure with external threads. The pressure sensing device of this application employs a Luer male connector connection structure to be universally applicable to various medical devices, thereby increasing the applicable environment of the pressure sensing device.

[0014] In some embodiments, the Luer male connector is integrally formed with the fluid inlet. Integrating the threaded structure of the Luer male connector with the fluid inlet gives the fluid inlet itself threaded connection properties, further improving the ease of use of the pressure sensing device of this application.

[0015] In some embodiments, the first connector is configured to be pluggably installed on the fluid inlet. For example, the first connector of this application may plug the fluid inlet to protect it; alternatively, the first connector of this application may not plug the fluid inlet to allow the fluid inlet to be used as needed.

[0016] In some embodiments, the pressure sensing device further includes a second connector communicating with the fluid outlet, the second connector being configured to be detachably mounted on the fluid outlet. By providing the second connector to the pressure sensing device, it is possible to connect it to the fluid outlet, thereby further enabling the pressure sensing device of this application to be installed in any desired application.

[0017] In some embodiments, the second connector is threadedly connected to the fluid outlet. Configuring the second connector and the fluid outlet as a threaded connection adapts to the operating environment of the medical device, facilitates disassembly and installation, and further ensures a secure connection at the connection points.

[0018] In some embodiments, the fluid outlet is configured as a Luer female connector, and the second connector is provided with an internal thread adapted to the Luer female connector. A Luer female connector can be understood as a structure provided with an internal thread. The pressure sensing device of this application employs a Luer female connector connection structure to be universally applicable to various medical devices, thereby increasing the applicable environment of the pressure sensing device.

[0019] In some embodiments, the Luer connector and the fluid outlet are integrally formed. Integrating the internally threaded structure of the Luer connector with the fluid outlet gives the fluid outlet itself a threaded connection capability, further improving the ease of use of the pressure sensing device of this application.

[0020] In some embodiments, the pressure sensing device further includes a sealing cap for sealing the sensor module to the flow guide tube. The sealing cap prevents fluid from flowing out of the flow guide tube, ensuring that the pressure sensing device does not experience fluid leakage during application.

[0021] Secondly, this application provides an arteriovenous cannulation device, which includes the pressure sensing device described in the above embodiments; and a vascular catheter, wherein the vascular catheter and the fluid outlet are connected via a second connector. The arteriovenous cannulation device of this application can achieve all the effects of the pressure sensing device described above, which will not be elaborated upon here.

[0022] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 This is a schematic front view of a pressure sensing device according to an embodiment of this application;

[0025] Figure 2 A pressure sensing device according to one embodiment of this application Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0026] Figure 3 This is a schematic front view of the arteriovenous cannulation device in one embodiment of this application;

[0027] Figure 4 An arteriovenous cannulation device according to one embodiment of this application Figure 3 Schematic diagram of the cross-sectional structure at point BB.

[0028] The reference numerals in the detailed embodiments are as follows:

[0029] 1000. Arterial and venous catheterization devices;

[0030] 100. Pressure sensing device; 200. Vascular catheterization;

[0031] 101. Flow guide tube; 102. Sensor module; 103. First connector; 104. Second connector;

[0032] 1011. Flow channel; 1012. Fluid inlet; 1013. Fluid outlet;

[0033] 1021. Chip; 1022. Wireless transmission module; 1023. Battery; 1024. Sealing cover. Detailed Implementation

[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0040] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] The applicant notes that existing arterial and venous catheterization devices have various problems, two of which are: inconvenient reading and the risk of dislodging the vascular cannula from the patient's injection site.

[0043] Based on the above considerations, in order to ensure safe and convenient operation during medical examinations or treatments, the applicant has conducted in-depth research and designed a pressure sensing device and an arteriovenous cannulation device with a pressure sensing device. By adding a pressure sensing device that is easy to install and read to the original arteriovenous cannulation device, safety hazards can be avoided, and medical diagnosis and treatment efficiency can be improved.

[0044] refer to Figures 1-4 The pressure sensing device 100 provided in this application embodiment can be used for examination, infusion, blood drawing, or surgical procedures involving arterial and venous catheterization. A pressure sensing system for the arterial and venous catheterization device 1000 can be constructed using the pressure sensing device 100 disclosed in this application.

[0045] This application provides an arteriovenous cannulation device 1000 using a pressure sensor. The arteriovenous cannulation device 1000 can have, but is not limited to, the structure of the solution in this application. The pressure sensing device 100 in this application can be applied to any environment where medical procedures require monitoring of pressure parameters.

[0046] Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 A pressure sensing device 100, provided in some embodiments of this application, includes a flow guide pipe 101 and a sensor module 102. Along the fluid flow direction, the flow guide pipe 101 includes a flow channel 1011; the flow channel 1011 includes a fluid inlet 1012 and a fluid outlet 1013, configured to be connected to the passage through which the fluid flows. The sensor module 102 is connected to the flow guide pipe 101 and configured to communicate with the flow channel 1011, so that the sensor module 102 senses the pressure parameters of the fluid flowing through the flow channel 1011. The sensor module 102 is configured to wirelessly transmit the pressure parameters to the outside.

[0047] In the technical solution of this application embodiment, the sensor module 102 is disposed on the guide pipe 101, and the sensor module 102 is directly disposed on the guide pipe 101, which can directly sense the pressure parameters of the fluid flowing through the flow channel 1011 of the guide pipe 101. Furthermore, the fluid inlet 1012 and the fluid outlet 1013 are configured to be connectable to the fluid flow path, so that the pressure sensing device 100 of this application can be detachably installed in various medical environments, further improving the convenience of application of the pressure sensing device 100. During the fluid flow through the flow channel 1011, the sensor module 102, which is directly connected to the flow channel 1011, can sense and monitor the pressure parameters of the fluid in real time, facilitating installation and application.

[0048] Specifically, the sensor module 102 of this application may include: a chip 1021, on which a wireless transmission module 1022 and a battery 1023 for providing power are disposed. Furthermore, a sensing unit is disposed on the chip 1021, at least a portion of which is directly connected to the flow channel 1011. The wireless transmission module 1022 is used to acquire the pressure parameters obtained by the sensing unit and wirelessly transmit the pressure parameters to the receiving unit. Using the above-described sensor module 102, with the sensing unit configured to directly connect part or all of its structure to the flow channel 1011, the pressure parameters of the fluid can be acquired. Through the combined action of the wireless transmission module 1022 and the sensing unit, the pressure sensing device 100 of this application can transmit the sensed fluid pressure parameters wirelessly, thus avoiding various risks associated with wired transmission.

[0049] For example, a first mounting groove is formed on the side wall of the guide pipe 101 along the radial direction, and the sensor module 102 is disposed in the first mounting groove. By adopting this solution, combined with the direct communication between the sensor module 102 and the flow channel 1011, the sensor module 102 can be stably installed in the first mounting groove of the guide pipe 101, thereby enabling the sensor module 102 to monitor the pressure parameters of the fluid flowing through the flow channel 1011 in real time. This application does not limit the structure, shape, or size of the first mounting groove, as long as it can be used to install the sensor module 102. Furthermore, this application does not limit the position of the sensor module 102 installed in the first mounting groove, as long as it ensures that the sensor module 102 can sense the pressure parameters of the fluid. For example, the first mounting groove can be a square groove or a circular groove, or it can be a groove of any regular shape or an irregular shape.

[0050] For example, the first mounting groove includes a first bottom surface, and at least a portion of the structure on the first bottom surface is connected to the flow channel 1011. Using the pressure sensing device 100 of this solution, at least a portion of the structure on the first bottom surface is connected to the flow channel 1011. As can be seen from the foregoing, the fluid in the flow channel 1011 can be directly connected to the sensor module 102 via the connection point, thereby enabling the sensor module 102 to acquire the pressure parameters of the fluid in real time, achieving a real-time monitoring effect. This application does not limit the structure of other surfaces of the first mounting groove, as long as it has a first bottom surface, and the first bottom surface can be used to mount the sensor module 102, and allows the sensor module 102 to be connected to the flow channel 1011.

[0051] Specifically, along the radial direction of the guide tube 101, a through hole communicating with the flow channel 1011 is formed on the first bottom surface, and at least a portion of the structure of the sensing unit intersects with the through hole. For example, the sensing unit of the sensor module 102 of this application may have only a portion of its structure intersecting with the through hole, or the sensing unit of the sensor module 102 of this application may be entirely contained within the projection range of the through hole relative to the flow channel 1011. This application does not limit the structure, shape, or size of the through hole, as long as all the aforementioned effects can be achieved. Using the pressure sensing device 100 of this application, at least a portion of the structure of the sensing unit is set to intersect with the through hole formed on the first bottom surface, so that the pressure sensing device 100 can directly obtain the pressure parameters of the fluid flowing through the flow channel 1011 through the sensing unit, thereby ensuring the sensing efficiency of the pressure sensing device 100.

[0052] For example, refer to Figures 1-4The pressure sensing device 100 further includes a first connector 103, which communicates with the fluid inlet 1012 and is configured to be detachably installed on the fluid inlet 1012. By providing the first connector 103 to the pressure sensing device 100, a corresponding structure in the medical device can be connected to the fluid inlet 1012 via the first connector 103, thereby further enabling the pressure sensing device 100 of this application to be installed in any desired access path. This application does not limit the material of the first connector 103, as long as it meets the standard requirements for medical devices. This application does not limit the model, structure, or size of the first connector 103; the specific design will depend on the actual application requirements.

[0053] For example, the first connector 103 of this application can be threadedly connected to the fluid inlet 1012. Configuring the first connector 103 and the fluid inlet 1012 as a threaded connection adapts to the operating environment of the medical device, facilitates disassembly and installation, and further ensures a secure connection between the connected parts.

[0054] For example, refer to Figure 2 The fluid inlet 1012 can be configured as a Luer male connector, which is a common connection structure in medical devices with external threads. Based on the external thread structure of the Luer male connector, the first connector 103 can be provided with an internal thread adapted to the Luer male connector. The pressure sensing device 100 of this application adopts a Luer male connector connection structure to be universally applicable to various medical devices, thereby increasing the applicable environment of the pressure sensing device 100. This application does not limit the model, size, etc. of the Luer male connector, and can set it according to the actual application environment requirements.

[0055] For example, refer to Figure 2 The Luer male connector and fluid inlet 1012 can be integrally molded. That is, Figure 2 The fluid inlet 1012 has an external thread on its raised outer periphery to accommodate other medical device structures. The Luer male connector of this application is integrally formed with the fluid inlet 1012, resulting in a simple structure and convenient use. This allows the fluid inlet 1012 to possess threaded connection properties, further improving the ease of application of the pressure sensing device 100 of this application.

[0056] Additionally, by way of example, the first connector 103 is configured to be pluggably mounted on the fluid inlet 1012. (See reference...) Figure 2 and Figure 4The first connector 103 includes a sealing structure that, when installed on the fluid inlet 1012, seals the fluid inlet 1012. This application does not limit the sealing structure of the first connector 103, as long as it allows for a sealable installation on the fluid inlet 1012. For example, the first connector 103 may seal the fluid inlet 1012 to protect it; alternatively, the first connector 103 may not seal the fluid inlet 1012, allowing the fluid inlet 1012 to be used as needed.

[0057] For example, refer to Figures 1-4 The pressure sensing device 100 further includes a second connector 104, which communicates with the fluid outlet 1013 and is configured to be detachably mounted on the fluid outlet 1013. This application does not limit the model, structure, or size of the second connector 104; the specific design depends on the actual application requirements. By providing the second connector 104 to the pressure sensing device 100, it can be connected to the fluid outlet 1013, further enabling the pressure sensing device 100 of this application to be installed in any desired application.

[0058] For example, refer to Figure 2 and Figure 4 The second connector 104 can be threadedly connected to the fluid outlet 1013. The threaded connection between the second connector 104 and the fluid outlet 1013 is configured to adapt to the operating environment of the medical device, facilitate disassembly and installation, and further achieve a tight connection between the connected parts.

[0059] For example, the fluid outlet 1013 can be configured as a Luer connector, where the Luer connector is a commonly used connection structure in medical devices with internal threads. Based on the internal thread structure of the Luer connector, the corresponding structural component connected to it can be provided with an external thread adapted to the Luer connector. The pressure sensing device 100 of this application adopts a Luer connector connection structure to be universally applicable to various medical devices, thereby increasing the applicable environment of the pressure sensing device 100. This application does not limit the model, size, etc. of the Luer connector, and can set it according to the actual application environment requirements. Reference Figure 4This is one possible implementation of the pressure sensing device 100 of this application, wherein the fluid outlet 1013 can be provided with a connecting section, which has an outer contour structure with a gradually decreasing outer diameter in the direction of fluid flow. In practical applications, the vascular catheter 200 can be inserted into the outer contour of the connecting section, and the outer wall of the vascular catheter 200 can be provided with external threads. In this case, the internal thread of the second connector 104 can be threadedly connected with the external thread of the outer wall of the vascular catheter 200. At the same time, since the outer wall of the connecting section has a gradually changing size structure, under the combined action of the second connector 104, the vascular catheter 200, and the connecting section, the pressure sensing device 100 of this application can be detachably installed in various medical environments.

[0060] For example, the Luer female head and the fluid outlet 1013 can be integrally formed. By integrally forming the internally threaded structure of the Luer female head with the fluid outlet 1013, the fluid outlet 1013 itself has the property of threaded connection, further improving the ease of application of the pressure sensing device 100 of this application.

[0061] For example, the pressure sensing device 100 also includes a sealing cap 1024, which is used to seal the sensor module 102 to the guide tube 101. The sealing cap 1024 prevents fluid from flowing out of the guide tube 101, ensuring that the pressure sensing device 100 will not experience fluid leakage during application. This application does not limit the structure, shape, or size of the sealing cap 1024, as long as it can achieve the above-mentioned functions.

[0062] For example, the first connector 103 may include a first opening that communicates with the flow channel 1011. With the first opening, fluid is ensured to preferentially flow into and out of the first connector 103 via the first opening, and then flow to the fluid inlet 1012. This makes the pressure sensing device 100 of this application universally applicable to various medical devices.

[0063] For example, the second connector 104 may include a second opening that is configured to communicate with the flow channel 1011. The second opening ensures that fluid flowing through the guide tube 101 can flow into and out of the second connector 104.

[0064] This application can also provide an arteriovenous cannulation device 1000 having the pressure sensing device 100 described above. The arteriovenous cannulation device 1000 includes the pressure sensing device 100 described in the above embodiment; and a vascular catheter 200, which is connected to the fluid outlet 1013 via a second connector 104. The arteriovenous cannulation device 1000 of this application can achieve all the effects of the pressure sensing device 100 described above, which will not be elaborated here.

[0065] Based on the above structures of the pressure sensing device 100 and the arteriovenous catheterization device 1000, the arteriovenous catheterization device 1000 of this application, by using the pressure sensing device 100 as a single functional plug-in, separates it from the arteriovenous catheterization device 1000, making clinical applications more flexible and allowing doctors to choose according to actual conditions. In terms of use, since the structure of the Luer head at the tail end of the pressure sensing device 100 is consistent with the structure of the Luer head used for medical infusion, the change in the pressure sensing device 100 is equivalent to a slight extension of the vascular catheter 200, requiring no additional learning cost for the operator. Moreover, a wireless transmission module 1022 is added to the sensor module 102, which can transmit the pressure signal to the signal receiving unit. The signal receiving unit can display the signal on the monitor, realizing wireless connection to the pressure sensor and monitoring of blood pressure, reducing the investment of cables, and without changing the center of gravity of the vascular catheter 200, reducing the risk of the vascular catheter 200 possibly dislodging. Using the pressure sensing device 100 and arteriovenous cannulation device 1000 of this application makes it more convenient and safer to use, and can effectively prevent problems such as dislodgement of the vascular catheter 200 or damage to the patient's blood vessels caused by improper pressure or improper operation.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An arteriovenous cannulation device, characterized in that, include: Pressure sensing device, including: A flow guide tube, along the flow direction of the fluid, includes a flow channel, the flow channel including a fluid inlet and a fluid outlet, the fluid inlet and the fluid outlet being configured to connect to the passage through which the fluid flows; the fluid inlet is configured as a Luer male connector, the Luer male connector being integrally formed with the fluid inlet, the Luer male connector being provided with external threads; along the radial direction of the flow guide tube, a first mounting groove is formed on the side wall of the flow guide tube; A sensor module is disposed in the first mounting slot, and the sensor module is configured to communicate with the flow channel so that the sensor module can sense the pressure parameter of the fluid flowing through the flow channel; the sensor module is configured to wirelessly transmit the pressure parameter to the outside. A first connector is configured to be threaded to the Luer male connector and communicates with the fluid inlet; or, the first connector is configured to be pluggably installed at the fluid inlet. The second connector is threadedly connected to the fluid outlet and communicates with the fluid outlet; the fluid outlet is configured as a Luer female head, which is integrally formed with the fluid outlet and has an internal thread; the fluid outlet has a connecting section, which is threadedly connected to and communicates with the Luer female head; the connecting section has an outer profile structure with a gradually decreasing outer diameter in the direction of fluid flow; the second connector is located on the outer periphery of the connecting section and has an internal thread; an annular cavity for pipe passage is formed between the second connector and the connecting section. The vascular catheter has one end inserted into the patient's artery or vein, and the other end placed in the annular cavity formed between the second connector and the connecting section. The other end of the vascular catheter is inserted into and sealed with the connecting section, and is threadedly connected to the second connector to communicate with the fluid outlet through the second connector.

2. The arteriovenous cannulation device of claim 1, wherein, An annular protrusion is provided on the outer periphery of the fluid inlet, and the external thread is provided on the protrusion.

3. The arteriovenous cannulation device of claim 1, wherein, When the first connector is configured to be pluggably installed at the fluid inlet, the first connector includes a plugging structure that at least partially extends through the fluid inlet and plugs the fluid inlet.

4. The arteriovenous cannulation device of claim 1, wherein, The sensor module includes: a chip, on which a wireless transmission module and a battery for providing power are disposed; The chip is also provided with a sensing unit, and at least a part of the structure of the sensing unit is directly connected to the flow channel; The wireless transmission module is used to acquire the pressure parameters obtained by the sensing unit and wirelessly transmit the pressure parameters to the receiving unit.

5. The arteriovenous cannulation device of claim 4, wherein, The first mounting groove includes a first bottom surface, and at least a portion of the structure on the first bottom surface is in communication with the flow channel.

6. The arteriovenous catheterization device according to claim 5, characterized in that, Along the radial direction of the guide tube, a through hole communicating with the flow channel is provided on the first bottom surface, and at least a part of the structure of the sensing unit intersects with the through hole.

7. The arteriovenous cannulation device according to claim 2, wherein, The pressure sensing device also includes a sealing cover for sealing the sensor module with the flow guide tube.

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