Multifunctional catheter

Abstract

The invention relates to the technical field of medical instruments, in particular to a multifunctional catheter which comprises a first catheter body and a second catheter body, the far end section of the first catheter body is provided with a thrombolysis area, and the thrombolysis area is provided with a first through hole communicated with the interior of the first catheter body; the second catheter body comprises an inner core and blocking pieces arranged at the far end section of the inner core, the inner core can be inserted into the first catheter body, a pressure measuring area is formed between the two blocking pieces arranged in a spaced mode, and a second through hole communicated with the inner core and the first catheter body is formed in the pressure measuring area. The problem of blood vessel rupture and bleeding caused by thrombolysis high pressure is reduced, and the safety of an operation is improved.

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 catheter is a medical device commonly used in the medical field, especially in interventional radiology and endovascular surgery. It is mainly used to deliver contrast agents or other medical materials into blood vessels or organs during interventional procedures such as angiography, aneurysm treatment, and angioplasty, so that doctors can clearly observe the internal structure of blood vessels or organs through 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 purpose of treatment. Compared with traditional catheter-directed thrombectomy and other methods, catheter-directed thrombolysis does not require general anesthesia and has less surgical trauma, so it is an ideal treatment for thrombus treatment. 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 arteries may rupture and bleed under the action of hypertension, 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 can easily 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 thrombolytic area, the thrombolytic 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 can be inserted into the first tube body, a pressure measuring area is 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 element is in sealing contact with the inner wall of the first tube body.

[0008] In a possible implementation, a plurality of 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 manner, a 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 manner, 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 manner, the inner core is slidably disposed along the axial direction of the first tube body.

[0013] In a possible implementation manner, a developing mark is provided on the outer peripheral side 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 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 pass the 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 while thrombolysis is being performed, thereby reducing the problem of blood vessel rupture and bleeding caused by 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 A schematic structural diagram of a multifunctional catheter provided in an embodiment of the present application is shown;

[0021] Figure 2 A schematic structural diagram of a first tube body provided in an embodiment of the present application is shown;

[0022] Figure 3 A schematic diagram showing the structure of another first tube body provided in an embodiment of the present application is shown;

[0023] Figure 4 A partially enlarged structural schematic diagram of a first through hole provided in an embodiment of the present application is shown;

[0024] Figure 5 A partially enlarged structural schematic diagram of another first through hole provided in an embodiment of the present application is shown;

[0025] Figure 6 A schematic structural diagram of a second tube body provided in an embodiment of the present application is shown;

[0026] Figure 7 A partially enlarged structural schematic diagram of a barrier member and a development mark provided in an embodiment of the present application is shown;

[0027] Figure 8 A schematic diagram showing the structure of a multifunctional catheter provided in an embodiment of the present application for thrombolysis and pressure measurement;

[0028] Fig. 9 A partially enlarged structural schematic diagram of a distal end section of a multifunctional catheter provided in an embodiment of the present application is shown;

[0029] Fig.10 Show Fig. 9 Schematic diagram of the partial enlarged structure of the thrombolysis area and the pressure measurement area;

[0030] Fig.11 A schematic diagram of the structure of a multifunctional catheter provided in an embodiment of the present application when measuring pressure is shown;

[0031] Fig.12 Show Fig.11 Schematic diagram of the local enlarged structure of the middle pressure measurement area.

[0032] Description of reference numerals:

[0033] 1. The first tube body; 11. The thrombolysis area; 12. The first through hole; 13. The curled portion;

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

[0035] 3. Three-way valve; 31. Seal. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] The disclosure below provides many different embodiments or examples to realize the different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the embodiments of the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0038] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. 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 undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein 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, thereby reducing the problem of blood vessel rupture and bleeding caused by high pressure during thrombolysis and improving the safety of the operation.

[0040] like Figure 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] The distal end section of the first tube body 1 is provided with a thrombolytic region 11 , and the thrombolytic region 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 thrombolysis is being performed, thereby reducing the problem of blood vessel rupture and bleeding caused by thrombolysis high pressure 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, which 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 judge the patency of the lesion by measuring the pressure at different lesion locations, and then the existing technology needs to rely on invasive examination methods such as CT or angiography to achieve it. The current thrombolytic catheter and blood pressure monitoring catheter are designed independently of each other. The blood pressure is measured while thrombolysis is performed, which is easy to cause 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, thereby 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. The first tube body 1 needs to be inserted through the puncture point under local anesthesia. The distal end of the first tube body 1 needs to be inserted to the location of the thrombus, and 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 while thrombolysis is being performed, reducing the problem of vascular rupture and bleeding caused by 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 arterial catheterization 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 from each other. The two barrier members 22 are sealed and abutted against the inner wall of the first tube body 1, and the distal end of the inner cavity of the first tube body 1 can be blocked, so that the drug liquid in the first tube body 1 will not enter the pressure measuring area 23, but can only enter the blood vessel through the part of the first through hole 12 of the thrombolytic 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, and the liquid in the blood vessel enters the pressure measuring area 23 through the 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, and the blood pressure can be measured by measuring the liquid pressure in the inner core 21, thereby ensuring the accuracy of the measurement of the intravascular pressure.

[0050] Specifically, a sealing component is disposed on the outer peripheral side of the barrier 22 . The sealing component may be a silicone ring or other soft materials. 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 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, thereby ensuring the simultaneous implementation of thrombolysis and pressure measurement.

[0052] like Figure 4-5 As shown, in some embodiments, a plurality of 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 arranged 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, 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 .

[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 Figure 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, so as to ensure 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 as 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 the inner core 21 sliding 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 the adjustment of the thrombolytic solution outlet position. The solution 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, so that the pressure measuring area 23 can be connected with 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, so as to facilitate the doctor to accurately position the pressure when measuring.

[0068] Specifically, the development 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 the present application, part of the second tube body 2 is located outside the first tube body 1, through which the second tube body 2 can be pulled and pushed, thereby driving the inner core 21 to slide in the first tube body 1, which is convenient for operation. The pressure measuring hole 26 is connected to a pressure measuring instrument, thereby realizing the measurement of 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 body 1 includes 1-3 layers of developing high molecular polymer or woven mesh or spring combination welded together. For example, its structure can be composed of 1 layer of high molecular polymer (Pebax, PA, PE, etc.); it can also be composed of 2 layers of polymer, the inner layer is PTFE lining film, and the outer layer is high molecular polymer (Pebax, PA, PE, etc.); it can also be composed of 3 layers of polymer, the inner layer is PTFE lining film, the middle layer is a reinforcement layer such as stainless steel woven mesh or stainless steel spring, and the outer layer is high molecular polymer (Pebax, PA, PE, etc.).

[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 for the inner core 21 of the second tube body 2 to be inserted into the first tube body 1. The three-way valve 3 is detachably connected to the first tube body 1. During the specific operation, the distal end section of the first tube body 1 is first extended into the blood vessel with the assistance of a guide wire, so that the distal end section of the first tube body 1 is inserted to the location of the thrombus, and then the guide wire is withdrawn, the three-way valve 3 is connected to the proximal end section of the first tube body 1, and then 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 disposed at the rear end of the first tube body 1 .

[0077] In some embodiments, a sealing member 31 is disposed 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 seal 31 is in sealing 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 avoiding the waste of the medicine due to the overflow of the medicine from the connection between the first tube body 1 and the second tube body 2.

[0079] Specifically, the sealing member 31 is disposed 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 pulling 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, and the rubber ring abuts against the outer wall of the second tube body 2 to achieve sealing.

[0081] The multifunctional catheter dissolves the thrombus in the blood vessel by injecting 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. 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 thrombolysis is being performed, thereby reducing the problem of blood vessel rupture and bleeding caused by high pressure of thrombolysis and improving the safety of the operation.

[0082] Example 1

[0083] like Figure 8-10As shown, when performing thrombolysis, an appropriate puncture point is selected according to the location of the thrombus. Common puncture points include the affected popliteal vein, femoral vein or healthy femoral vein. 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 position 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. Thrombolytic drugs are 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 dosage of the drug 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 agent 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 Figure 11-12 As shown, when measuring pressure, according to the position of embolism, select appropriate puncture point. Under local anesthesia, insert the first tube body 1 through the puncture point, withdraw the common guide wire, install the three-way valve 3, 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 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 embolized, the blood flow velocity at the far end of the embolism is accelerated due to the reduction of the blood vessel diameter, and the pressure will be reduced. The pressure change at the proximal and distal ends of the embolism is detected by pulling the inner core 21 to determine the position of the embolism, and then the thrombolytic drug is injected to make it only locally thrombolytic to prevent the waste of liquid medicine. The specific situation of the embolism site is determined by pressure measurement, and then the thrombolytic drug dosage is determined according to the specific situation of the embolism.

[0086] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments 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 "include", "comprise", "contain", and "have" are inclusive and therefore specify the presence of 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 interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order 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, 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 is only a specific implementation of the present application, so that those skilled in the art can 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 can 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 will conform to the widest range consistent with the principles and novel features applied for herein.

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 thrombolytic region (11), and the thrombolytic 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) being insertable into the first tube body (1), a pressure measuring area (23) being formed between two barrier members (22) arranged at intervals, the pressure measuring area (23) being provided with a second through hole (24) connecting the inner core (21) and the first tube body (1).

2. The multifunctional catheter according to claim 1, characterized in that: The barrier (22) is in sealing contact with the inner wall of the first tube (1).

3. The multifunctional catheter according to claim 1, characterized in that: A plurality of groups of the first through holes (12) are arranged along the extension direction of the first tube body (1), and the number of the first through holes (12) connected to the pressure measuring area (23) is one group.

4. The multifunctional catheter according to claim 3, 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).

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

6. The multifunctional catheter according to claim 1, characterized in that: 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 a blood vessel.

7. 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).

8. The multifunctional catheter according to claim 7, characterized in that: A developing mark (25) is provided on the outer peripheral side of the barrier (22).

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

10. 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 a medical solution into the first tube body (1).

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