Multi-functional catheter

Abstract

The application relates to the technical field of medical devices, in particular to a multifunctional catheter, which comprises a first tube body and a second tube body, a thrombolytic area is arranged at the distal end section of the first tube body, the thrombolytic area is provided with a first through hole in communication with the inside of the first tube body; the second tube body comprises an inner core and a barrier arranged at the distal end section of the inner core, the inner core can be inserted into the first tube body, pressure measuring areas are formed between two spaced barriers, and the pressure measuring areas are provided with second through holes in communication with the inner core and the first tube body, the multifunctional catheter can measure blood pressure while thrombolysis, reduces the problem of blood vessel rupture and bleeding caused by high pressure during thrombolysis, and improves the safety of operation.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a multifunctional catheter. Background Art

[0002] Angiography catheters are commonly used in medicine, particularly in interventional radiology and endovascular surgery. They are primarily used to deliver contrast agents or other medical materials into blood vessels or organs during interventional procedures such as angiography, aneurysm treatment, and angioplasty, enabling doctors to clearly visualize the internal structure of blood vessels or organs using imaging techniques such as X-rays.

[0003] Catheter-directed thrombolysis (abbreviated as catheter-directed thrombolysis) is a method for treating intravascular thrombosis. Its mechanism is to directly infuse high-concentration thrombolytic drugs around the thrombus through a thrombolytic catheter to dissolve the thrombus and achieve the treatment goal. Compared with traditional catheter-directed thrombectomy and other methods, catheter-directed thrombolysis does not require general anesthesia and has less surgical trauma, making it an ideal treatment for thrombosis. During the thrombolysis process, blood pressure is not effectively controlled, and the elasticity of arterial blood vessels is relatively poor. The complications after intravenous thrombolysis are mainly because thrombolytic drugs can cause bleeding in important organs, such as cerebral hemorrhage, fundus hemorrhage, or coronary artery bleeding of the heart; especially in patients with hypertension and atherosclerosis, the effects of hypertension can lead to rupture and bleeding of arteries, resulting in a relatively high incidence of bleeding in important organs of the human body.

[0004] At present, the thrombolytic catheters and blood pressure monitoring catheters on the market are designed independently and cannot measure pressure during thrombolysis. They are prone to cause vascular bleeding due to high blood pressure, affecting the safety of the operation. Summary of the Invention

[0005] The purpose of the present application is to provide a multifunctional catheter that can measure blood pressure while performing thrombolysis, thereby reducing the problem of blood vessel rupture and bleeding caused by high pressure of thrombolysis and improving the safety of the operation.

[0006] To this end, an embodiment of the present application provides a multifunctional catheter, comprising: a first tube body, a distal section of the first tube body being provided with a thrombolysis area, the thrombolysis area being provided with a first through hole connected to the interior of the first tube body; and a second tube body, the second tube body comprising an inner core and a barrier member arranged at the distal section of the inner core, the inner core being insertable into the first tube body, a pressure measuring area being formed between two spaced-apart barrier members, the pressure measuring area being provided with a second through hole connecting the inner core and the first tube body.

[0007] In a possible implementation manner, the barrier member is in sealing contact with the inner wall of the first tube.

[0008] In a possible implementation, multiple groups of first through holes are provided along the extension direction of the first tube body, and the number of first through holes communicating with the pressure measuring area is one group.

[0009] In a possible implementation, the group of first through holes includes a plurality of first through holes, and the plurality of first through holes are evenly distributed along the circumference of the first tube body.

[0010] In a possible implementation, the number of the second through holes is 4-20.

[0011] In a possible implementation, the distal end section of the first tube is provided with a curled portion, and the curled portion is used to abut against the inner wall of the blood vessel.

[0012] In a possible implementation, the inner core is slidably arranged along the axial direction of the first tube body.

[0013] In a possible implementation, a developing mark is provided on the outer circumference of the barrier.

[0014] In a possible implementation, the proximal end section of the second tube body is provided with a pressure measuring hole communicated with the inner core, and the pressure measuring hole is used to connect to a pressure measuring instrument.

[0015] In one possible implementation, the first tube body and the second tube body are connected through a three-way valve, the first opening of the three-way valve is connected to the first tube body, the second opening of the three-way valve is used to insert the second tube body into the first tube body, and the third opening of the three-way valve is used to introduce liquid medicine into the first tube body.

[0016] According to the multifunctional catheter provided in the embodiment of the present application, the multifunctional catheter dissolves the thrombus in the blood vessel by injecting liquid medicine into the first tube body, and the liquid medicine in the first tube body is discharged through the first through hole of the thrombolysis area. At the same time, the proximal section of the second tube body can be connected to a pressure measuring instrument, and the liquid in the blood vessel enters the pressure measuring area through the first through hole and enters the inner core through the second through hole. The pressure measuring instrument can measure the blood pressure in the pressure measuring area by measuring the pressure of the liquid entering the inner core. The blood pressure can be measured at the same time as the thrombolysis, thereby reducing the problem of blood vessel rupture and bleeding caused by the high pressure of thrombolysis and improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] One or more embodiments are illustrated by way of example in the figures that form a part of this disclosure and which do not limit the scope of embodiments, in which like references indicate similar elements. Figures in the drawings are in simplified form and are not to precise scale as is common when human visualization is involved. Unless otherwise noted, elements in the figures are not necessarily to scale, emphasis provided by line thickness is for illustrative purpose only, and the illustration of a particular element in a drawing does not imply that the particular element is to scale in any drawing in which the particular element can be shown.

[0020] Figure 1 Fig. 1 shows a structural schematic diagram of a multifunctional catheter provided by an embodiment of the present application;

[0021] Figure 2 Fig. 2 shows a structural schematic diagram of a first tube provided by an embodiment of the present application;

[0022] Figure 3 Fig. 3 shows a structural schematic diagram of another first tube provided by an embodiment of the present application;

[0023] Figure 4 Fig. 4 shows a partial enlarged structural schematic diagram of a first through hole provided by an embodiment of the present application;

[0024] Figure 5 Fig. 5 shows a partial enlarged structural schematic diagram of another first through hole provided by an embodiment of the present application;

[0025] Figure 6 Fig. 6 shows a structural schematic diagram of a second tube provided by an embodiment of the present application;

[0026] Figure 7 Fig. 7 shows a partial enlarged structural schematic diagram of a barrier and a developing mark provided by an embodiment of the present application;

[0027] Figure 8 Fig. 8 shows a structural schematic diagram of a multifunctional catheter for thrombolysis and pressure measurement provided by an embodiment of the present application;

[0028] Figure 9 Fig. 9 shows a partial enlarged structural schematic diagram of a distal segment of a multifunctional catheter provided by an embodiment of the present application;

[0029] Figure 10 Fig. 10 shows a partial enlarged structural schematic diagram of a thrombolysis area and a pressure measurement area provided by an embodiment of the present application; Figure 9

[0030] Fig. 11 shows a structural schematic diagram of a multifunctional catheter for pressure measurement provided by an embodiment of the present application; Figure 11

[0031] Fig. 12 shows a partial enlarged structural schematic diagram of a pressure measurement area provided by an embodiment of the present application. Figure 12 Figure 11

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] ​​1. first tube body; 11. thrombolytic region; 12. first through hole; 13. crimping portion;

[0034] 2. second tube body; 21. inner core; 22. barrier; 23. pressure measuring region; 24. second through hole; 25. developing mark; 26. pressure measuring hole;

[0035] 3. three-way valve; 31. sealing member. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the reference numerals and / or letters can be repeatedly referred to in different examples in the embodiments of the present application. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed.

[0038] In order to facilitate the description, spatial relative terms can be used in the text to describe the relative position relationship or movement of one element or feature with respect to another element or feature as shown in the figure, such as “internal”, “external”, “inboard”, “outboard”, “under”, “below”, “above”, “above”, “front”, “back” and the like. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped or changed in posture or changed in movement state, the directional indications will also change accordingly, for example: the element described as “under” or “below” another element or feature will be oriented as “above” or “above” another element or feature. Therefore, the example term “below” can include both the up and down orientations. The device can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0039] In order to solve the problems in the prior art, the present application provides a multifunctional catheter that can measure blood pressure while performing thrombolysis, reduce the problem of blood vessel rupture and bleeding caused by high pressure of thrombolysis, and improve the safety of surgery.

[0040] like Figures 1-12 As shown, an embodiment of the present application provides a multifunctional catheter, including a first tube body 1 and a second tube body 2.

[0041] A thrombolysis area 11 is provided at the distal end of the first tube body 1 . The thrombolysis area 11 is provided with a first through hole 12 communicating with the interior of the first tube body 1 .

[0042] The second tube body 2 includes an inner core 21 and a barrier 22 arranged at the distal end of the inner core 21. The inner core 21 can be inserted into the first tube body 1. A pressure measuring area 23 is formed between the two spaced-apart barrier members 22. The pressure measuring area 23 is provided with a second through hole 24 connecting the inner core 21 and the first tube body 1.

[0043] In the present application, by injecting liquid medicine into the first tube body 1, the liquid medicine in the first tube body 1 is discharged through the first through hole 12 of the thrombolysis area 11 to dissolve the thrombus in the blood vessel. At the same time, the proximal section of the second tube body 2 can be connected to a pressure measuring instrument. The liquid in the blood vessel enters the pressure measuring area 23 through the first through hole 12 and enters the inner core 21 through the second through hole 24. The pressure measuring instrument can measure the blood pressure in the pressure measuring area 23 by measuring the pressure of the liquid entering the inner core 21. The blood pressure can be measured while the thrombolysis is taking place, thereby reducing the problem of blood vessel rupture and bleeding caused by the high pressure of the thrombolysis and improving the safety of the operation.

[0044] Among them, catheter-directed thrombolysis (abbreviated as catheter-directed thrombolysis) is a method for treating intravascular thrombosis. Its mechanism is to directly infuse high-concentration thrombolytic drugs around the thrombus through a thrombolytic catheter to dissolve the thrombus and achieve the treatment purpose. Compared with traditional catheter-directed thrombectomy and other methods, catheter-directed thrombolysis does not require general anesthesia, the surgical trauma is also small, and it can also avoid repeated dragging of the catheter in the blood vessel, reducing damage to the blood vessel.

[0045] In the related art, invasive arterial pressure measurement is a method of directly monitoring blood pressure in the artery. It is achieved by inserting a catheter into the artery and connecting it to an external pressure sensor. This measurement method can provide continuous and dynamic blood pressure monitoring, which is particularly important for the monitoring of critically ill patients. Arterial blood pressure is an important clinical indicator reflecting the state of the cardiovascular system and is of great significance for evaluating cardiac function, blood volume status, vascular resistance, etc. In the diagnosis of embolic lesions, it is usually necessary to determine the patency of the lesion by measuring the pressure at different lesion locations. However, existing technologies rely on invasive examination methods such as CT or angiography to achieve this. The current thrombolytic catheter and blood pressure monitoring catheter are designed independently of each other. Blood pressure is measured while thrombolysis is being performed, which can easily lead to vascular bleeding due to high blood pressure in the blood vessels. If its function needs to be expanded, it is usually necessary to replace the catheter, which not only increases the risk of trauma to the patient, but also increases the economic burden on the patient.

[0046] In the embodiment of the present application, the distal section of the first tube body 1 is inserted into the blood vessel and reaches the location of the thrombus, and then the thrombus is dissolved by injecting the drug solution into the thrombus through the first tube body 1 and the first through hole 12. At the same time, the liquid in the blood vessel enters the pressure measuring area 23 through the first through hole 12 and enters the inner core 21 through the second through hole 24. The pressure measuring instrument measures the liquid pressure in the inner core 21 to complete the measurement of the blood pressure in the area corresponding to the pressure measuring area 23 in the blood vessel, thereby realizing real-time measurement of blood pressure during the thrombolysis process, avoiding rupture and bleeding of blood vessels due to high pressure of thrombolysis, and there is no need to replace the catheter midway, reducing the risk of trauma and economic burden on patients.

[0047] During the specific operation, the first tube body 1 and the second tube body 2 can be connected through the three-way valve 3. Under local anesthesia, the first tube body 1 needs to be inserted through the puncture point. The distal end of the first tube body 1 needs to be inserted to the location of the thrombus. Then the guide wire is withdrawn, and the inner core 21 of the second tube body 2 is inserted into the first tube body 1. The liquid medicine is injected into the first tube body 1 through the opening on the three-way valve 3. The liquid medicine in the first tube body 1 is discharged through the first through hole 12 of the thrombolysis area 11 to dissolve the thrombus. The proximal end of the second tube body 2 can be connected to a pressure measuring instrument to measure the blood pressure in the pressure measuring area 23. The blood pressure can be measured at the same time as the thrombolysis, reducing the problem of blood vessel rupture and bleeding caused by the high pressure of thrombolysis, and improving the safety of the operation. For acute thrombosis, antegrade thrombolysis can be performed through popliteal vein puncture; for acute thrombosis of the deep veins of the entire lower limb, retrograde thrombolysis or antegrade thrombolysis through an arterial catheter can be performed.

[0048] In some embodiments, the barrier 22 is in sealing contact with the inner wall of the first tube 1 .

[0049] In the present application, two barrier members 22 are provided, and the two barrier members 22 are spaced apart. The two barrier members 22 are sealed against the inner wall of the first tube body 1, and can block the distal end of the inner cavity of the first tube body 1, so that the medical liquid in the first tube body 1 will not enter the pressure measuring area 23, but can only enter the blood vessel through part of the first through hole 12 of the thrombolysis area 11 to dissolve the thrombus; at the same time, a pressure measuring area 23 is formed between the two barrier members 22, which is located in the first tube body 1 but isolated from the inner cavity of the first tube body 1. The liquid in the blood vessel enters the pressure measuring area 23 through part of the first through hole 12, and then the liquid in the pressure measuring area 23 enters the inner core 21 through the second through hole 24, that is, the liquid pressure in the inner core 21, the pressure measuring area 23 and the blood vessel are kept consistent. The blood pressure can be measured by measuring the liquid pressure in the inner core 21, thereby ensuring the accuracy of the pressure measurement in the blood vessel.

[0050] Specifically, a sealing component is provided on the outer peripheral side of the barrier 22 . The sealing component may be a silicone ring or other soft material. The sealing component abuts against the inner wall of the first tube body 1 to improve the sealing performance.

[0051] Specifically, a plurality of first through holes 12 are provided. Among the plurality of first through holes 12, the one located between the barrier 22 and the proximal end section of the first tube body 1 is used for the discharge of the drug solution, and the first through hole 12 located between the two barrier members 22 is used for the liquid in the blood vessel to enter the pressure measuring area 23. The two do not interfere with each other, ensuring the simultaneous implementation of thrombolysis and pressure measurement.

[0052] like Figures 4-5 As shown, in some embodiments, multiple groups of first through holes 12 are provided along the extension direction of the first tube body 1 , and the number of first through holes 12 communicating with the pressure measuring area 23 is one group.

[0053] In the present application, multiple groups of first through holes 12 are provided along the extension direction of the first tube body 1, and the first through holes 12 connected to the pressure measuring area 23 are grouped together, so that the pressure measuring area 23 is only connected to the liquid at the same position in the blood vessel, thereby accurately determining the pressure measuring position in the blood vessel and improving the accuracy of blood pressure measurement.

[0054] Furthermore, the group of first through holes 12 includes a plurality of first through holes 12 , and the plurality of first through holes 12 are evenly distributed along the circumference of the first tube body 1 .

[0055] In some embodiments, a group of first through holes 12 includes a plurality of first through holes 12 , and the plurality of first through holes 12 are evenly distributed along the circumference of the first tube body 1 .

[0056] like Figures 4-5 As shown, in the present application, the number of a group of first through holes 12 is 2-3. By arranging multiple first through holes 12 at the same position, the flow rate of the thrombolytic solution can be maintained, thereby ensuring the dissolving effect on the thrombus.

[0057] In some embodiments, the number of the second through holes 24 is 4-20.

[0058] In the present application, the liquid in the pressure measuring area 23 enters the inner core 21 through the plurality of second through holes 24, thereby ensuring the effectiveness of the pressure measurement.

[0059] Specifically, the length of the pressure measuring area 23 is 1 cm-5 cm, and this area is connected to a group of first through holes 12, thereby ensuring the accuracy of the pressure measurement.

[0060] like Figure 3 As shown, in some embodiments, the distal end section of the first tube body 1 is provided with a curled portion 13, and the curled portion 13 is used to abut against the inner wall of the blood vessel.

[0061] In the present application, by setting the distal section of the first tube body 1 into a curled portion 13, the curled portion 13 can abut the inner wall of the blood vessel, thereby stabilizing the first tube body 1 in the blood vessel, ensuring the stability of the first tube body 1, and further ensuring the smooth progress of subsequent thrombolysis and pressure measurement.

[0062] Optionally, the distal end of the first tube 1 may also be configured as a straight structure.

[0063] In some embodiments, the inner core 21 is slidably disposed along the axial direction of the first tube body 1 .

[0064] In the present application, by sliding the inner core 21 axially in the first tube body 1, the position of the barrier 22 in the thrombolytic area 11 can be changed, and the number of first through holes 12 blocked by the barrier 22 can be changed, thereby achieving adjustment of the thrombolytic liquid outlet position. The liquid outlet position can be adjusted according to the length and position of the thrombus, thereby simplifying the operation process, shortening the operation time, and improving efficiency.

[0065] Moreover, the inner core 21 slides axially along the first tube body 1, and the pressure measuring area 23 can be connected to different first through holes 12, thereby measuring the pressure at different positions in the blood vessel, thereby improving the flexibility and accuracy of surgery and pressure measurement.

[0066] like Figure 7 、 10 As shown in FIG. 12 , in some embodiments, a developing mark 25 is provided on the outer peripheral side of the barrier 22 .

[0067] In the present application, a developing mark 25 is provided on the periphery of the barrier 22 . The developing mark 25 is a marking material that can be developed under X-rays, which facilitates the doctor to accurately position the pressure when measuring.

[0068] Specifically, the imaging mark 25 is a platinum-iridium ring, which can accurately locate the pressure measurement area 23 and the thrombolysis area 11 .

[0069] Specifically, the outer circumferences of the two blocking members 22 are respectively provided with development marks 25 , that is, the area between the two development positions is the pressure measuring area 23 , and the pressure measuring area 23 can be further determined, and the position proximal to the two development positions is the thrombolysis area 11 .

[0070] In some embodiments, the proximal end section of the second tube body 2 is provided with a pressure measuring hole 26 communicating with the inner core 21 , and the pressure measuring hole 26 is used to connect a pressure measuring instrument.

[0071] like Figure 6 As shown, in this application, the second tube body 2 is located outside the first tube body 1. Through this portion, the second tube body 2 can be pulled and pushed, thereby driving the inner core 21 to slide within the first tube body 1, facilitating operation. The pressure measuring hole 26 is connected to a pressure measuring instrument to measure the blood pressure in the pressure measuring area 23.

[0072] Optionally, the pressure measuring hole 26 can also be used to connect other equipment or introduce and extract liquid, which is not limited here.

[0073] In some embodiments, the first tube body 1 and the second tube body 2 are connected through a three-way valve 3, the first opening of the three-way valve 3 is connected to the first tube body 1, the second opening of the three-way valve 3 is used to insert the second tube body 2 into the first tube body 1, and the third opening of the three-way valve 3 is used to introduce liquid medicine into the first tube body 1.

[0074] In the present application, the structure of the first tube 1 comprises 1-3 layers of a developer polymer, a woven mesh, or a spring, welded together. For example, the structure can be composed of a single layer of a polymer (e.g., Pebax, PA, PE); a double layer of polymer, with an inner PTFE lining and an outer polymer (e.g., Pebax, PA, PE); or a triple layer of polymer, with an inner PTFE lining, a middle layer of a stainless steel woven mesh or stainless steel spring reinforcement, and an outer polymer (e.g., Pebax, PA, PE).

[0075] The three-way valve 3 adopts a Y-shaped valve, and the first opening and the second opening of the three-way valve 3 are arranged opposite to each other. After the first opening is connected to the three-way valve 3, it is convenient to insert the inner core 21 of the second tube body 2 into the first tube body 1. The three-way valve 3 and the first tube body 1 are detachably connected. During the specific operation, the distal end of the first tube body 1 is first extended into the blood vessel with the help of a guide wire, so that the distal end of the first tube body 1 is inserted to the location of the thrombus. Then, the guide wire is withdrawn, the three-way valve 3 is connected to the proximal end of the first tube body 1, and the inner core 21 of the second tube body 2 is inserted into the first tube body 1.

[0076] Specifically, the curling portion 13 is provided at the tail end of the first tube 1 .

[0077] In some embodiments, a sealing member 31 is provided at the second opening of the three-way valve 3 , and the sealing member 31 is in sealing contact with the outer wall of the second tube body 2 .

[0078] In the present application, the sealing member 31 is in sealed contact with the outer wall of the second tube body 2, so that the sealing between the first tube body 1 and the second tube body 2 can be ensured when the second tube body 2 is pulled out, thereby preventing the drug solution from overflowing from the connection between the first tube body 1 and the second tube body 2 and causing waste of the drug solution.

[0079] Specifically, the sealing member 31 is provided on the three-way valve 3. After the three-way valve 3 is connected to the first tube body 1, the inner core 21 of the second tube body 2 is inserted into the first tube body 1 through the second opening. The second tube body 2 is sealed and fitted with the sealing member 31 to achieve sealing without affecting the pulling and drawing action of the second tube body 2.

[0080] Specifically, the sealing member 31 is a sealing cap on the three-way valve 3 , and a rubber ring is provided on the inner ring of the sealing cap. The rubber ring abuts against the outer wall of the second tube body 2 to achieve sealing.

[0081] The multifunctional catheter injects liquid medicine into the first tube body 1, and the liquid medicine in the first tube body 1 is discharged through the first through hole 12 of the thrombolysis area 11 to dissolve the thrombus in the blood vessel. At the same time, the proximal section of the second tube body 2 can be connected to a pressure measuring instrument. The liquid in the blood vessel enters the pressure measuring area 23 through the first through hole 12 and enters the inner core 21 through the second through hole 24. The pressure measuring instrument can measure the blood pressure in the pressure measuring area 23 by measuring the pressure of the liquid entering the inner core 21. The blood pressure can be measured at the same time as the thrombolysis, thereby reducing the problem of blood vessel rupture and bleeding caused by the high pressure of thrombolysis and improving the safety of the operation.

[0082] Example 1

[0083] like Figures 8-10As shown, when performing thrombolysis, an appropriate puncture point is selected according to the location of the thrombus. Common puncture points include the popliteal vein, femoral vein, or healthy femoral vein on the affected side. Under local anesthesia, the first tube body 1 is inserted through the puncture point, the ordinary guide wire is withdrawn, the three-way valve 3 is installed, and the inner core 21 of the second tube body 2 is inserted through the three-way valve 3. After the catheter is in place, angiography is performed to determine the location and range of the thrombus. According to the length and location of the thrombus, the length of the thrombolysis can be adjusted by pulling the inner core 21 to ensure accurate thrombolysis. Commonly used thrombolytic drugs include urokinase, alteplase, etc. The thrombolytic drug is injected into the catheter to act directly on the thrombus. The common dose of urokinase is 200,000 to 1 million units / day, and the catheter is usually retained for no more than 7 days. During the thrombolysis process, a pressure sensor is connected to the pressure measuring hole 26 of the second tube body 2 to monitor the patient's blood pressure throughout the process and adjust the drug dosage to avoid or reduce bleeding complications. However, when it is found that the thrombus is reduced and only local thrombus is present, the length of the thrombolytic solution can be adjusted by pulling out the inner core 21 so that the thrombolysis is only performed locally, thereby preventing the waste of the drug solution.

[0084] Example 2

[0085] like Figures 11-12 As shown, when performing pressure measurement, according to the position of the embolism, an appropriate puncture point is selected. Under local anesthesia, the first tube body 1 is inserted through the puncture point, the ordinary guide wire is withdrawn, the three-way valve 3 is installed, and the catheter needs to be inserted to the position of the embolism. After the catheter is in place, angiography is performed to determine the position and range of the embolism. According to the length and position of the embolism, the position of the pressure measurement can be adjusted by pulling out the inner core 21. The pressure sensor is connected to the pressure measuring hole 26 of the second tube body 2. When the blood vessel is embolic, the blood flow velocity at the distal end of the embolism is accelerated due to the reduction of the blood vessel diameter, and the pressure will be reduced. By pulling out the inner core 21, the pressure change of the proximal and distal ends of the embolism is detected, the position of the embolism is determined, and then the thrombolytic drug is injected so that it only performs thrombolysis locally to prevent waste of liquid medicine. The specific situation of the embolic site is determined by pressure measurement, and then the amount of thrombolytic drug is determined according to the specific situation of the embolism.

[0086] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an", and "" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain", and "have" are inclusive and therefore specify the presence of the stated features, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0087] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0088] The above are merely specific embodiments of the present application to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather is intended to conform to the widest scope consistent with the principles and novel features of the present application.

Claims

1. A multifunctional catheter, characterized in that: include: A first tube body (1), wherein a distal end section of the first tube body (1) is provided with a thrombolysis region (11), and the thrombolysis region (11) is provided with a first through hole (12) communicating with the interior of the first tube body (1); and a second tube body (2), the second tube body (2) comprising an inner core (21) and a barrier (22) arranged at a distal end of the inner core (21); the inner core (21) can be inserted into the first tube body (1); a pressure measuring area (23) is formed between two spaced-apart barrier members (22); the pressure measuring area (23) is provided with a second through hole (24) communicating with the inner core (21) and the first tube body (1); The barrier (22) is in sealing contact with the inner wall of the first tube (1); A plurality of groups of the first through holes (12) are provided along the extension direction of the first tube body (1), and the number of the first through holes (12) communicating with the pressure measuring area (23) is one group.

2. The multifunctional catheter according to claim 1, characterized in that A group of the first through holes (12) comprises a plurality of the first through holes (12), and the plurality of the first through holes (12) are evenly distributed along the circumference of the first tube body (1).

3. The multifunctional catheter according to claim 1, characterized in that The number of the second through holes (24) is 4-20.

4. The multifunctional catheter according to claim 1, characterized in that The distal end section of the first tube (1) is provided with a curled portion (13), and the curled portion (13) is used to abut against the inner wall of a blood vessel.

5. The multifunctional catheter according to claim 1, characterized in that The inner core (21) is slidably arranged along the axial direction of the first tube body (1).

6. The multifunctional catheter according to claim 5, characterized in that A developing mark (25) is provided on the outer peripheral side of the barrier (22).

7. The multifunctional catheter according to claim 5, characterized in that The proximal end section of the second tube body (2) is provided with a pressure measuring hole (26) communicating with the inner core (21), and the pressure measuring hole (26) is used to connect a pressure measuring instrument.

8. The multifunctional catheter according to claim 1, characterized in that The first tube body (1) and the second tube body (2) are connected via a three-way valve (3); a first opening of the three-way valve (3) is connected to the first tube body (1); a second opening of the three-way valve (3) is used for inserting the second tube body (2) into the first tube body (1); and a third opening of the three-way valve (3) is used for introducing liquid medicine into the first tube body (1).

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