Catheter and method for blood flow detection

Abstract

The application discloses a catheter and a blood flow detection method. The catheter comprises a pipe body, a first detection member, a second detection member and a connecting member. The first detection member and the second detection member are connected with the pipe body. One end of the connecting member is adapted to be connected with a power supply and a processor, and the other end is electrically connected with the first detection member and the second detection member. In the first detection member and the second detection member, one of the two is used for emitting an ultrasonic signal, and the other of the two is used for receiving the ultrasonic signal. The pipe body has the first detection member and the second detection member exposed in a blood vessel. The first detection member and the second detection member are mutually opposite or the first detection member and the second detection member are opposite to the blood vessel to detect the blood flow velocity. The catheter with the above structure can directly enter the blood vessel to detect the blood flow velocity. The detected data has high accuracy, and the real-time performance of the blood flow velocity detection is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a catheter and blood flow detection method. Background Technology

[0002] In physiological state monitoring, especially during cardiovascular surgery, the direct display of a series of physiological states such as patient status, bleeding status, blood perfusion status, and determination of the degree of vascular stenosis, as well as real-time blood flow monitoring, are of great significance in these types of surgeries.

[0003] In existing technologies, blood flow monitoring is mainly conducted using external ultrasound probes. The basic principle of an ultrasound machine is to emit a series of ultrasound waves into the human body through an ultrasound probe, scanning in a specific direction. By monitoring the echo delay time and the intensity patterns of the echoes, the distance and nature of various organs can be determined. Combining pathology and clinical medicine, through observation, analysis, and summarization of various reflection patterns, a diagnosis can be made regarding the location, nature, and degree of functional impairment of the lesion.

[0004] However, the complexity of using ultrasound machines and their large size cannot meet the requirements for blood flow monitoring. Furthermore, the ultrasound waves emitted by the ultrasound probe can only monitor blood flow outside the human body, resulting in low accuracy and inadequate real-time performance of the data. Therefore, the data can only be used as a qualitative indicator and is not convenient for monitoring blood flow in patients during surgery. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of B-ultrasound machines, which use ultrasound probes to emit ultrasound waves that can only monitor blood flow outside the human body, resulting in low accuracy of the data monitored by the B-ultrasound machine and failure to meet the requirements of real-time performance.

[0006] Therefore, the present invention provides a catheter, comprising:

[0007] tube body;

[0008] The first detection element and the second detection element are both connected to the tube body;

[0009] A connector, one end of which is adapted to be connected to a power source and a processor, and the other end is electrically connected to the first and second detection elements, wherein one of the first and second detection elements is used to emit an ultrasonic signal, and the other is used to receive the ultrasonic signal.

[0010] The tube body has the first detection element and the second detection element exposed inside the blood vessel. The first detection element and the second detection element reflect each other or reflect the blood vessel to detect the blood flow velocity in the blood vessel.

[0011] Optionally, in the above-mentioned catheter, the tube body is provided with a first mounting portion and a second mounting portion, and the first detection element and the second detection element are respectively disposed in the first mounting portion and the second mounting portion. The first detection element is set at an angle to the axial direction of the inner wall of the blood vessel, or the second detection element is set at an angle to the axial direction of the inner wall of the blood vessel.

[0012] Optionally, in the above-described conduit, both the first mounting portion and the second mounting portion are grooves spaced upward along the axial direction of the tube body.

[0013] Optionally, the aforementioned conduit further includes a first driving member, which is configured as an elastic structure with a first arc. One end of the first driving member is connected to the first detection member. Under the drive of an external force, the first driving member drives the first detection member to extend out of the tube body along the direction of the first arc until the first detection member and the second detection member are positioned opposite each other, so that the first detection member and the second detection member form a counter-beam when the tube body is in the detection state.

[0014] Optionally, the aforementioned conduit further includes a guide member, which is mounted on the tube body. The first driving member is slidably disposed on the guide member. The tube body has a first retracted state in which both the first detection member and the second detection member are within the tube body. In the first retracted state, the first driving member is retracted into the tube body by overcoming its own elasticity under the action of the guide member.

[0015] Optionally, in the above-mentioned catheter, an installation groove is provided on the side wall of the tube body. In the first retracted state, the first detection element is disposed in the installation groove; the second detection element is disposed in the installation groove, and the second detection element is disposed at an angle to the axial direction of the inner wall of the blood vessel.

[0016] Optionally, the above-mentioned conduit further includes a second driving member, which is configured as an elastic structure with a second arc. One end of the second driving member is connected to the first detection member and the second detection member. Under the drive of an external force, the second driving member drives the first detection member and the second detection member to extend out of the tube body along the direction of the second arc until the first detection member and the second detection member are positioned opposite each other, so that the first detection member and the second detection member form a counter-beam when the tube body is in the detection state.

[0017] Optionally, in the above-mentioned conduit, one end of the tube body is provided with an opening, and the tube body has a second retracted state in which both the first detection element and the second detection element are in the tube body. In the second retracted state, the second driving element is elastically retracted into the tube body by the action of the inner side wall of the tube body.

[0018] A blood flow detection method includes the following steps:

[0019] Installation: Insert the catheter into the corresponding position in the blood vessel, or insert the catheter into the corresponding position in the blood vessel and extend the first detection element out of the catheter until the first detection element and the second detection element are positioned opposite each other to form a counter-beam; or insert the catheter into the corresponding position in the blood vessel and extend both the first detection element and the second detection element out of the catheter until the first detection element and the second detection element are positioned opposite each other to form a counter-beam;

[0020] Transmitting and receiving ultrasonic signals: In the first detection element and the second detection element, one of them transmits ultrasonic signals, and the other of them receives ultrasonic signals;

[0021] Calculation: The blood flow velocity is calculated based on the time from the first detection element emitting the ultrasonic signal to the second detection element receiving the ultrasonic signal, or based on the time from the second detection element emitting the ultrasonic signal to the second detection element receiving the ultrasonic signal; the blood flow velocity is calculated using the time-of-flight method or the Doppler frequency shift method.

[0022] Optionally, in the above-described blood flow detection method, the catheter is the catheter according to any one of claims 1-8.

[0023] The technical solution provided by this invention has the following advantages:

[0024] 1. The catheter provided by the present invention includes a tube body, a first detection element, a second detection element, and a connector. The first and second detection elements are both connected to the tube body. One end of the connector is adapted to be connected to a power source and a processor, and the other end is electrically connected to the first and second detection elements. In the first and second detection elements, one of them is used to emit an ultrasonic signal, and the other is used to receive an ultrasonic signal. The tube body has the first and second detection elements exposed inside the blood vessel, and the first and second detection elements reflect each other or reflect off the blood vessel to detect the blood flow velocity inside the blood vessel.

[0025] This conduit structure includes a first and second detection element mounted on the conduit body, and a connector disposed within the conduit body. Both the first and second detection elements are connected to the conduit body and can emit or receive ultrasonic signals. When the first detection element emits an ultrasonic signal, the second detection element receives it; conversely, when the second detection element emits an ultrasonic signal, the first detection element receives it. The two elements can switch between each other. One end of the connector is connected to an external power supply and processor, while the other end is electrically connected to the first and second detection elements, thereby supplying power to them and enabling the first detection element to emit an ultrasonic signal. The first and second detection elements can normally emit or receive ultrasonic signals. Both the first and second detection elements can extend from inside the catheter into the blood vessel, and they face each other to form a beam of light. Alternatively, the first and second detection elements can remain on the catheter, allowing the ultrasonic signal emitted by the first detection element to be reflected by the inner wall of the blood vessel and transmitted towards the second detection element, enabling the second detection element to receive the ultrasonic signal and detect the blood flow velocity within the blood vessel. This catheter directly enters the blood vessel to detect the blood flow velocity, resulting in high accuracy and improved real-time performance of the blood flow velocity detection.

[0026] 2. The catheter provided by the present invention has a first mounting portion and a second mounting portion on the tube body. A first detection element and a second detection element are respectively disposed in the first mounting portion and the second mounting portion. The first detection element is set at an angle to the axial direction of the inner wall of the blood vessel, or the second detection element is set at an angle to the axial direction of the inner wall of the blood vessel. Both the first mounting portion and the second mounting portion are grooves spaced apart along the axial direction of the tube body.

[0027] This catheter structure features a first mounting portion and a second mounting portion formed on the catheter body. A first detection element and a second detection element are respectively disposed within the first and second mounting portions, with at least one of the detection elements inclined within either the first or second mounting portion, forming an angle with the axial direction of the blood vessel wall. This allows the blood vessel wall to reflect the ultrasonic signal emitted by either detection element, thus detecting the blood flow velocity within the blood vessel. By designing both the first and second mounting portions as grooves with a certain depth, the first or second detection element can be inclinedly disposed within the grooves, further enabling the blood vessel wall to reflect the ultrasonic signal. The first and second mounting portions are spaced apart on the catheter body, allowing for a certain transmission time for the ultrasonic signal, facilitating the calculation of blood flow velocity.

[0028] 3. The catheter provided by the present invention further includes a first driving member, which is configured as an elastic structure with a first arc. One end of the first driving member is connected to a first detection member. Under the drive of an external force, the first driving member drives the first detection member to extend out of the tube body along the direction of the first arc until the first detection member and the second detection member are positioned opposite each other, so that the first detection member and the second detection member form a counter-beam when the tube body is in the detection state. It also includes a guide member, which is mounted on the tube body. The first driving member is slidably mounted on the guide member. The tube body has a first retracted state in which both the first detection member and the second detection member are within the tube body. In the first retracted state, the first driving member, under the action of the guide member, overcomes its own elasticity and retracts into the tube body. A mounting groove is formed on the side wall of the tube body. In the first retracted state, the first detection member is positioned in the mounting groove; the second detection member is positioned in the mounting groove, and the second detection member is angled to the axial direction of the inner wall of the blood vessel.

[0029] This catheter structure features a first driving component connected at one end to a first detection element. This first driving component is constructed as an elastic structure with a first arc, allowing it to maintain this arc under its own elastic force. When the first driving component, under external force, extends the first detection element along the first arc direction outside the catheter body, the first and second detection elements face each other, forming a counter-projection to facilitate the detection of blood flow velocity within the blood vessel. A guide element mounted on the catheter body allows the first driving component to slide along it. Under external force, the first driving component overcomes its own elastic force and retracts into the catheter body. Simultaneously, the first driving component retracts the first detection element into the catheter body, facilitating catheter removal from the blood vessel. In the first retracted state, the first detection element retracts into the installation groove through the mounting groove on the tube body. At the same time, the second detection element is directly set in the installation groove, and the second detection element is set at an angle to the axial direction of the inner wall of the blood vessel. This facilitates the first detection element and the second detection element to face each other under the action of the first driving element, so as to form a beam, thereby facilitating the detection of blood flow velocity in the blood vessel.

[0030] 4. The catheter provided by the present invention further includes a second driving member, which is configured as an elastic structure with a second arc. One end of the second driving member is connected to the first and second detection members. Under the drive of an external force, the second driving member drives the first and second detection members to extend out of the tube body along the direction of the second arc until the first and second detection members are positioned opposite each other, so that the first and second detection members form a counter-projection when the tube body is in the detection state. One end of the tube body is provided with an opening, and the tube body has a second retracted state in which both the first and second detection members are inside the tube body. In the second retracted state, the second driving member is elastically retracted into the tube body under the action of the inner side wall of the tube body.

[0031] This catheter structure features a second driving member connected at one end to a first and a second detection element. This second driving member is constructed as an elastic structure with a second arc, allowing its two ends to spring open under its own elastic force, forming the second arc. When the second driving member, under external force, extends the first and second detection elements along the second arc direction outside the catheter body, its two ends spring open, causing them to face each other and form a beam-to-beam configuration for detecting blood flow velocity within the blood vessel. Through an opening at one end of the catheter body, the second driving member can retract from the opening into the catheter body under external force, simultaneously causing the first and second detection elements to retract from the opening into the catheter body, facilitating catheter removal from the blood vessel.

[0032] 5. The blood flow detection method provided by the present invention includes the following steps: installation, transmission and reception of ultrasonic signals, and calculation. The installation step involves inserting a catheter into a corresponding position within a blood vessel, or inserting a catheter into a corresponding position within a blood vessel and extending a first detection element outside the catheter until the first and second detection elements are positioned opposite each other to form a beam reflex; or inserting the catheter into a corresponding position within a blood vessel and extending both the first and second detection elements outside the catheter until the first and second detection elements are positioned opposite each other to form a beam reflex. The transmission and reception of ultrasonic signals step involves one of the first and second detection elements transmitting an ultrasonic signal, and the other receiving the ultrasonic signal. The calculation step involves calculating the blood flow velocity based on the time from the first detection element transmitting the ultrasonic signal to the second detection element receiving the ultrasonic signal, or calculating the blood flow velocity based on the time from the second detection element transmitting the ultrasonic signal to the second detection element receiving the ultrasonic signal. The blood flow velocity is calculated using the time-of-flight method or the Doppler frequency shift method. The catheter is the aforementioned type.

[0033] This blood flow detection method involves inserting the aforementioned catheter into a blood vessel. Both the first and second detection elements are connected to the catheter body. Both the first and second detection elements can emit or receive ultrasonic signals. When the first detection element emits an ultrasonic signal, the second detection element receives it; conversely, when the second detection element emits an ultrasonic signal, the first detection element receives it. The two elements can be switched between each other. One end of the connector is connected to an external power supply and processor, while the other end is electrically connected to the first and second detection elements, thereby supplying power to both elements and enabling their operation. It can normally emit or receive ultrasonic signals. The first and second detection elements can both extend from inside the catheter into the blood vessel, and the first and second detection elements face each other to form a beam of light. Alternatively, the first and second detection elements can still be set on the catheter, so that the ultrasonic signal emitted by the first detection element can be reflected by the inner wall of the blood vessel and transmitted towards the second detection element, so that the second detection element can receive the ultrasonic signal to detect the blood flow velocity in the blood vessel. This catheter directly enters the blood vessel to detect the blood flow velocity, and the detected data has high accuracy and also improves the real-time performance of blood flow velocity detection. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a first structure of the catheter in an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of a second structure of the catheter in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of a second structure of the catheter in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of a third structure of the catheter in an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of a third structure of the catheter in an embodiment of the present invention;

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Tube body;

[0042] 2-Blood vessels;

[0043] 3-First inspection piece;

[0044] 4-Second inspection piece;

[0045] 5-Connectors;

[0046] 6-First driving component;

[0047] 7-Guide components;

[0048] 8-Second driving component. Detailed Implementation

[0049] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not 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 invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] Example 1

[0054] This embodiment provides a catheter, such as Figures 1 to 5As shown, the device includes a tube body 1, a first detection element 3, a second detection element 4, and a connector 5. Both the first detection element 3 and the second detection element 4 are connected to the tube body 1. One end of the connector 5 is adapted to be connected to a power supply and a processor, and the other end is electrically connected to the first detection element 3 and the second detection element 4. In the first detection element 3 and the second detection element 4, one of them is used to emit an ultrasonic signal, and the other of them is used to receive an ultrasonic signal. The tube body 1 has the first detection element 3 and the second detection element 4 exposed inside the blood vessel 2. The first detection element 3 and the second detection element 4 reflect each other or reflect off the blood vessel 2 to detect the blood flow velocity inside the blood vessel 2. The conduit with the above-described structure, via a first detection element 3 and a second detection element 4 disposed on the tube body 1 and a connector 5 disposed within the tube body 1, in this embodiment, both the first detection element 3 and the second detection element 4 are ultrasonic sensors, both connected to the tube body 1. Both the first detection element 3 and the second detection element 4 can emit or receive ultrasonic signals. When the first detection element 3 emits an ultrasonic signal, the second detection element 4 receives the ultrasonic signal; conversely, when the second detection element 4 emits an ultrasonic signal, the first detection element 3 receives the ultrasonic signal. They can switch between each other. In this embodiment, the connector 5 is a cable, one end of which is connected to an external power supply and processor, and the other end is electrically connected to the first detection element 3 and the second detection element 4. This provides power to the first detection element 3 and the second detection element 4, enabling them to normally emit or receive ultrasonic signals. Both the first detection element 3 and the second detection element 4 extend from inside the catheter into the blood vessel 2, facing each other to form a beam-to-beam transmission. Alternatively, the first detection element 3 and the second detection element 4 can remain mounted on the catheter, allowing the ultrasonic signal emitted by the first detection element 3 to be reflected by the inner wall of the blood vessel 2 and transmitted towards the second detection element 4, enabling the second detection element 4 to receive the ultrasonic signal and detect the blood flow velocity within the blood vessel 2. This catheter directly enters the blood vessel 2 to detect the blood flow velocity, resulting in high accuracy and improved real-time performance of the blood flow velocity detection.

[0055] The catheter provided in this embodiment, such as Figure 1As shown, the tube body 1 has a first mounting portion and a second mounting portion. A first detection element 3 and a second detection element 4 are respectively disposed within the first mounting portion and the second mounting portion. The first detection element 3 is angled to the axial direction of the inner wall of the blood vessel 2, or the second detection element 4 is angled to the axial direction of the inner wall of the blood vessel 2. In this catheter structure, the first detection element 3 and the second detection element 4 are respectively disposed within the first mounting portion and the second mounting portion on the tube body 1. At least one of the first detection element 3 and the second detection element 4 is inclined within the first mounting portion or the second mounting portion, so that the first detection element 3 or the second detection element 4 is angled to the axial direction of the inner wall of the blood vessel 2. This allows the inner wall of the blood vessel 2 to reflect the ultrasonic signal emitted by either detection element, thereby detecting the blood flow velocity within the blood vessel 2.

[0056] The catheter provided in this embodiment, such as Figure 1 As shown, both the first mounting portion and the second mounting portion are grooves spaced upwards along the axial direction of the tube body 1. In the catheter with the above structure, by setting both the first and second mounting portions to be grooves with a certain depth, the first detection element 3 or the second detection element 4 can be inclinedly positioned within the groove, thereby allowing the blood vessel wall 2 to reflect ultrasonic signals. Furthermore, the spaced arrangement of the first and second mounting portions on the tube body 1 allows for a certain transmission time of the ultrasonic signal, facilitating the calculation of blood flow velocity.

[0057] The catheter provided in this embodiment, such as Figure 2 and Figure 3 As shown, it also includes a first driving member 6, which is constructed as an elastic structure with a first arc. One end of the first driving member 6 is connected to the first detection member 3. Under the drive of an external force, the first driving member 6 drives the first detection member 3 to extend out of the tube body 1 along the direction of the first arc until the first detection member 3 and the second detection member 4 are positioned opposite each other, so that the first detection member 3 and the second detection member 4 form a counter-beam when the tube body 1 is in the detection state. In the above-described catheter structure, the first driving member 6, which is connected to the first detection member 3 at one end, is a control guidewire in this embodiment. The first driving member 6 is constructed as an elastic structure with a first arc, which can present a first arc under the action of its own elastic force. When the first driving member 6 drives the first detection member 3 to extend out of the tube body 1 along the direction of the first arc under the action of an external force, the first detection member 3 and the second detection member 4 face each other, thereby forming a counter-beam, so as to facilitate the detection of blood flow velocity in the blood vessel 2.

[0058] The catheter provided in this embodiment, such as Figure 2 and Figure 3As shown, the catheter also includes a guide 7, which is mounted on the tube body 1. A first driving member 6 is slidably disposed on the guide 7. The tube body 1 has a first retracted state in which both the first detection member 3 and the second detection member 4 are inside the tube body 1. In the first retracted state, the first driving member 6, under the action of the guide 7, overcomes its own elasticity and retracts into the tube body 1. In the above-described catheter structure, through the guide 7 mounted on the tube body 1, in this embodiment, the guide 7 is a fixed shaft, and the first driving member 6 can slide on the guide 7. Under the action of external force, the first driving member 6 can overcome its own elastic force and retract into the tube body 1 under the action of the guide 7. At the same time, the first driving member 6 drives the first detection member 3 to retract into the tube body 1, which is beneficial for removing the catheter from the blood vessel 2.

[0059] The catheter provided in this embodiment, such as Figure 2 and Figure 3 As shown, a mounting groove is provided on the side wall of the tube body 1. In the first retracted state, the first detection element 3 is disposed in the mounting groove; the second detection element 4 is disposed in the mounting groove, and the second detection element 4 is set at an angle to the axial direction of the inner wall of the blood vessel 2. In the first retracted state, the first detection element 3 is retracted into the mounting groove by the first driving element 6 through the mounting groove on the tube body 1. At the same time, the second detection element 4 is directly disposed in the mounting groove, and the second detection element 4 is inclined in the mounting groove so as to be set at an angle to the axial direction of the inner wall of the blood vessel 2. This facilitates the detection of blood flow velocity in the blood vessel 2 by the first driving element 6 facing each other.

[0060] The catheter provided in this embodiment, such as Figure 4 and Figure 5 As shown, it also includes a second driving member 8, which is constructed as an elastic structure with a second arc. One end of the second driving member 8 is connected to the first detection member 3 and the second detection member 4. Under the drive of an external force, the second driving member 8 causes the first detection member 3 and the second detection member 4 to extend out of the tube body 1 along the direction of the second arc until the first detection member 3 and the second detection member 4 are positioned opposite each other, so that the first detection member 3 and the second detection member 4 form a counter-shoot when the tube body 1 is in the detection state. In the above-described catheter structure, the second driving member 8, which is connected to the first detection member 3 and the second detection member 4 at one end, is a control guidewire in this embodiment. The second driving member 8 is constructed as an elastic structure with a second arc. Under the action of its own elastic force, the two ends of the second driving member 8 can spring apart to form a second arc. When the second driving member 8 causes the first detection member 3 and the second detection member 4 to extend out of the tube body 1 along the direction of the second arc under the action of an external force, the two ends of the second driving member 8 spring apart, so that the first detection member 3 and the second detection member 4 face each other, thereby forming a counter-shoot, so as to detect the blood flow velocity in the blood vessel 2.

[0061] The catheter provided in this embodiment, such as Figure 4 and Figure 5 As shown, one end of the tube body 1 has an opening. The tube body 1 has a second retracted state in which both the first detection element 3 and the second detection element 4 are inside the tube body 1. In the second retracted state, the second driving element 8 is pushed back into the tube body 1 by the action of the inner sidewall of the tube body 1, overcoming its own elasticity. With the above-described catheter structure, through the opening at one end of the tube body 1, the second driving element 8 can be retracted from the opening into the tube body 1 under the action of external force. At the same time, the second driving element 8 drives the first detection element 3 and the second detection element 4 to retract from the opening into the tube body 1, which is beneficial for removing the catheter from the blood vessel 2.

[0062] Example 2

[0063] This embodiment provides a blood flow detection method, such as Figures 1 to 5As shown, the procedure includes the following steps: installation, transmission and reception of ultrasonic signals, and calculation. The installation step involves inserting the catheter into the corresponding position within the blood vessel 2, or inserting the catheter into the corresponding position within the blood vessel 2 and extending the first detection element 3 outside the catheter until the first detection element 3 and the second detection element 4 are positioned opposite each other to form a beam reflex, or inserting the catheter into the corresponding position within the blood vessel 2 and extending both the first detection element 3 and the second detection element 4 outside the catheter until they are positioned opposite each other to form a beam reflex. The transmission and reception of ultrasonic signals involves one of the first detection element 3 and the second detection element 4 transmitting an ultrasonic signal, and the other receiving the ultrasonic signal. The calculation step involves calculating the blood flow velocity based on the time from the first detection element 3 transmitting the ultrasonic signal to the second detection element 4 receiving the ultrasonic signal, or calculating the blood flow velocity based on the time from the second detection element 4 transmitting the ultrasonic signal to the second detection element 4 receiving the ultrasonic signal. The blood flow velocity is calculated using the time-of-flight method or the Doppler frequency shift method. The catheter is the aforementioned type. The blood flow detection method described above involves inserting the aforementioned catheter into the blood vessel 2. Both the first detection element 3 and the second detection element 4 are connected to the tube body 1. Both the first detection element 3 and the second detection element 4 can emit or receive ultrasonic signals. When the first detection element 3 emits an ultrasonic signal, the second detection element 4 receives it; conversely, when the second detection element 4 emits an ultrasonic signal, the first detection element 3 receives it. These two functions can be switched between each other. One end of the connector 5 is connected to an external power supply and processor, and the other end is electrically connected to the first detection element 3 and the second detection element 4, thereby supplying power to the first detection element 3 and the second detection element 4, enabling them to function. Component 4 can normally emit or receive ultrasonic signals. The first detection component 3 and the second detection component 4 can both extend from inside the catheter to outside the catheter, i.e., into the blood vessel 2. The first detection component 3 and the second detection component 4 face each other, thus forming a beam of light. Alternatively, the first detection component 3 and the second detection component 4 can still be set on the catheter, so that the ultrasonic signal emitted by the first detection component 3 can be reflected by the inner wall of the blood vessel 2 and transmitted towards the second detection component 4, so that the second detection component 4 can receive the ultrasonic signal to detect the blood flow velocity in the blood vessel 2. This catheter directly enters the blood vessel 2 to detect the blood flow velocity, and the detected data has high accuracy and also improves the real-time performance of the blood flow velocity detection.

[0064] The catheter provided by this invention has the following first working process:

[0065] First, a catheter is inserted into the corresponding position inside blood vessel 2; then, the first detection element 3 emits an ultrasonic signal, which is reflected on the inner wall of blood vessel 2 and transmitted towards the second detection element 4, which receives the ultrasonic signal; finally, the blood flow velocity is calculated based on the time from the emission of the ultrasonic signal by the first detection element 3 to the reception of the ultrasonic signal by the second detection element 4, using the time-of-flight method or the Doppler frequency shift method.

[0066] The catheter provided by this invention has the following second working process:

[0067] First, a catheter is inserted into the corresponding position inside blood vessel 2. Next, an external force is used to push the first driving member 6, which drives the first detection member 3 to extend out of the catheter along the first arc direction, and the first detection member 3 and the second detection member 4 form a counter-projection. Then, the first detection member 3 emits an ultrasonic signal, which is reflected on the inner wall of blood vessel 2 and transmitted towards the second detection member 4, which receives the ultrasonic signal. Finally, the blood flow velocity is calculated based on the time from the emission of the ultrasonic signal by the first detection member 3 to the reception of the ultrasonic signal by the second detection member 4, using the time-of-flight method or the Doppler frequency shift method.

[0068] The catheter provided by this invention has the following third working process:

[0069] First, a catheter is inserted into the corresponding position inside blood vessel 2. Next, an external force is used to push the second driving member 8, which drives the first detection member 3 and the second detection member 4 to extend out of the catheter along the second arc direction, with the first detection member 3 and the second detection member 4 forming a counter-beam. Then, the first detection member 3 emits an ultrasonic signal, which is reflected on the inner wall of blood vessel 2 and transmitted towards the second detection member 4, which receives the ultrasonic signal. Finally, the blood flow velocity is calculated based on the time from the first detection member 3 emitting the ultrasonic signal to the second detection member 4 receiving the ultrasonic signal, using the time-of-flight method or the Doppler frequency shift method.

[0070] The catheter provided by this invention, when inserted into a blood vessel 2, has a first detection element 3 and a second detection element 4 both connected to the catheter body 1. Both the first detection element 3 and the second detection element 4 can emit or receive ultrasonic signals. When the first detection element 3 emits an ultrasonic signal, the second detection element 4 receives it; conversely, when the second detection element 4 emits an ultrasonic signal, the first detection element 3 receives it. These two functions can be switched between each other. One end of the connector 5 is connected to an external power supply and processor, and the other end is electrically connected to the first detection element 3 and the second detection element 4, thereby supplying power to the first detection element 3 and the second detection element 4, enabling them to operate normally. 4. It can normally emit or receive ultrasonic signals. The first detection element 3 and the second detection element 4 can both extend from inside the catheter to outside the catheter, i.e., into the blood vessel 2. The first detection element 3 and the second detection element 4 face each other, so that they can form a beam of light. Alternatively, the first detection element 3 and the second detection element 4 can still be set on the catheter, so that the ultrasonic signal emitted by the first detection element 3 can be reflected by the inner wall of the blood vessel 2 and transmitted towards the second detection element 4, so that the second detection element 4 can receive the ultrasonic signal to detect the blood flow velocity in the blood vessel 2. This catheter directly enters the blood vessel 2 to detect the blood flow velocity. The detected data has high accuracy and also improves the real-time performance of the blood flow velocity detection.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A catheter suitable for insertion into a blood vessel (2), characterized in that, include: tube body(1); The first detection element (3) and the second detection element (4) are both connected to the tube body (1); A connector (5) is provided, one end of which is adapted to be connected to a power supply and a processor, and the other end is electrically connected to the first detection element (3) and the second detection element (4). In the first detection element (3) and the second detection element (4), one of them is used to emit an ultrasonic signal, and the other of them is used to receive the ultrasonic signal. The tube body (1) has the first detection element (3) and the second detection element (4) exposed inside the blood vessel (2), and the first detection element (3) and the second detection element (4) are facing each other; It also includes a first driving member (6), which is a control guide wire. The first driving member (6) is constructed as an elastic structure with a first arc. One end of the first driving member (6) is connected to the first detection member (3). Under the drive of an external force, the first driving member (6) drives the first detection member (3) to extend out of the tube body (1) along the direction of the first arc until the first detection member (3) and the second detection member (4) are arranged opposite to each other, so that the first detection member (3) and the second detection member (4) form a counter-beam when the tube body (1) is in the detection state. It also includes a guide (7) which is mounted on the tube body (1). The first drive (6) is slidably disposed on the guide (7). The tube body (1) has a first retracted state in which the first detection (3) and the second detection (4) are both inside the tube body (1). In the first retracted state, the first drive (6) is elastically retracted into the tube body (1) under the action of the guide (7).

2. The catheter according to claim 1, characterized in that, The tube body (1) is provided with a first mounting part and a second mounting part. The first detection element (3) and the second detection element (4) are respectively disposed in the first mounting part and the second mounting part. The first detection element (3) is set at an angle to the axial direction of the inner wall of the blood vessel (2) or the second detection element (4) is set at an angle to the axial direction of the inner wall of the blood vessel (2).

3. The catheter according to claim 2, characterized in that, Both the first mounting part and the second mounting part are grooves spaced upward along the axial direction of the tube body (1).

4. The catheter according to claim 3, characterized in that, The tube body (1) has an installation groove on its side wall. In the first retracted state, the first detection element (3) is installed in the installation groove; the second detection element (4) is installed in the installation groove and is set at an angle to the axial direction of the inner wall of the blood vessel (2).

5. A catheter, characterized in that, include: tube body(1); The first detection element (3) and the second detection element (4) are both connected to the tube body (1); A connector (5) is provided, one end of which is adapted to be connected to a power supply and a processor, and the other end is electrically connected to the first detection element (3) and the second detection element (4). In the first detection element (3) and the second detection element (4), one of them is used to emit an ultrasonic signal, and the other of them is used to receive the ultrasonic signal. The tube body (1) has the first detection element (3) and the second detection element (4) exposed inside the blood vessel (2), and the first detection element (3) and the second detection element (4) are mutually opposed. It also includes a second driving member (8), which is a control guide wire. The second driving member (8) is constructed as an elastic structure with a second arc. One end of the second driving member (8) is connected to the first detection member (3) and the second detection member (4). Under the drive of an external force, the second driving member (8) drives the first detection member (3) and the second detection member (4) to extend out of the tube body (1) along the direction of the second arc until the first detection member (3) and the second detection member (4) are arranged opposite to each other, so that the first detection member (3) and the second detection member (4) form a counter-beam when the tube body (1) is in the detection state.

6. The catheter according to claim 5, characterized in that, One end of the tube body (1) is provided with an opening. The tube body (1) has a second retracted state in which the first detection element (3) and the second detection element (4) are both inside the tube body (1). In the second retracted state, the second driving element (8) is overcoming its own elasticity and retracting into the tube body (1) under the action of the inner sidewall of the tube body (1).

7. A blood flow detection method, applicable to the catheter according to any one of claims 1-6, characterized in that, Includes the following steps: The first detection element (3) and the second detection element (4) are positioned opposite each other to form a photoelectric relationship; Transmitting and receiving ultrasonic signals: In the first detection element (3) and the second detection element (4), one of them transmits ultrasonic signals and the other of them receives ultrasonic signals; Calculation: The blood flow velocity is calculated based on the time from the first detection element (3) transmitting the ultrasonic signal to the second detection element (4) receiving the ultrasonic signal, or based on the time from the second detection element (4) transmitting the ultrasonic signal to the first detection element (3) receiving the ultrasonic signal; the blood flow velocity is calculated by the time-of-flight method or the Doppler frequency shift method.

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