Bending-adjustable thrombus aspiration catheter structure

Abstract

The utility model relates to the technical field of medical instruments, and discloses an adjustable bent thrombus aspiration catheter structure, which comprises a catheter main body, an adjusting unit and an aspiration unit, the aspiration unit is connected with the side surface of a fixing part, and meanwhile, the near end of a second channel is sealed, so that the problem of difficulty in adjusting the extension direction of a pull wire in the related technology is solved; the problems that the extending direction of an adjusting pull wire is inclined, the adjusting pull wire is blocked and the angle adjustment of an adjustable bending guide pipe in the related technology is affected due to the fact that the position of the non-adjustable bending guide pipe is interfered with the position of a hand wheel need to be solved, and therefore the adjusting unit does not need to adjust the extending direction; therefore, the angle adjustment smoothness of the bending part by the adjusting unit is improved, and the technical effect of improving the angle bending reliability of the bending part is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to adjustable bend thrombus suction catheter structure. BACKGROUND

[0002] Suction catheter is used for sucking thrombus, but in the process of clinical operation, the blood vessel exists shape bending or tortuous deformation etc, when the thrombus is located in the inner wall of the blood vessel, because the shape of the suction catheter cannot change, lead to the suction catheter cannot reach the blood vessel, also cannot suck the thrombus in the blood vessel.

[0003] The existing suction catheter adjusts the angle of the distal end relative to the angle of the proximal end, specifically, the suction catheter comprises:

[0004] The shell is provided with a mounting groove on the side surface;

[0005] The non-adjustable bend catheter is arranged inside the shell, and the distal end of the non-adjustable bend catheter is arranged outside the shell, and the first wire slot is arranged inside the non-adjustable bend catheter along the axial direction thereof;

[0006] The adjustable bend catheter is connected to the distal end of the non-adjustable bend catheter, and the second wire slot is arranged inside the adjustable bend catheter along the axial direction thereof, the proximal end of the second wire slot is communicated with the first wire slot, and the distal end of the second wire slot is communicated with the outside;

[0007] The hand wheel is partially arranged inside the shell and rotationally connected with the shell, and the hand wheel is partially arranged outside the shell through the mounting groove, and the hand wheel is driven to rotate relative to the shell by external force;

[0008] The adjusting pull wire is wound on the hand wheel at one end, and the other end of the adjusting pull wire extends to the first wire hole and passes through the first wire slot and the second wire slot, and is connected with the distal end of the adjustable bend catheter, that is, connected with the inner wall of the distal end of the second wire slot;

[0009] The driving structure is communicated with the proximal end of the non-adjustable bend catheter, and is used for providing negative pressure for sucking thrombus in the interior of the adjustable bend catheter through the non-adjustable bend catheter.

[0010] The length of the adjusting pull wire in the first wire slot and the second wire slot is adjusted by driving the hand wheel by external force, and the bending of the adjustable bend catheter relative to the non-adjustable bend catheter is realized, so that the suction catheter can suck the thrombus on the curved or tortuous wall of the blood vessel.

[0011] However, since the non-adjustable bending catheter needs to be communicated with the driving structure, adjusting the extension direction of the adjusting pull wire between the first wire slot and the hand wheel needs to avoid the position interference between the non-adjustable bending catheter and the hand wheel. In order to improve the smoothness of the communication between the non-adjustable bending catheter and the driving structure, the position of the hand wheel needs to be adjusted, and the extension direction of the adjusting pull wire also needs to be adjusted adaptively. At this time, the angle between the adjusting pull wire arranged in the first wire slot and the adjusting pull wire arranged outside the first wire slot is not equal to 180 degrees, causing the adjustment of the length of the adjusting pull wire to be stuck in the actual use process, and the angle of the adjustable bending catheter cannot be adjusted, causing the suction catheter to be unable to use. Content of the utility model

[0012] Therefore, the utility model provides a kind of adjustable bending thrombus suction catheter structure to solve the problem that the adjusting pull wire will appear stuck in the process of using existing suction catheter, and the angle of adjustable bending catheter cannot be adjusted, causing suction catheter to be unable to use.

[0013] The utility model provides a kind of adjustable bending thrombus suction catheter structure, comprising:

[0014] Catheter main body, including bending part and fixed part, the proximal end of the bending part is connected with the distal end of the fixed part, the distal end of the bending part can be bent relative to the fixed part, the inside of the bending part is equipped with first passageway, the inside of the fixed part is equipped with second passageway, the distal end of the first passageway is communicated with outside, the proximal end of the first passageway is communicated with the distal end of the second passageway, and the proximal end of the second passageway is sealed.

[0015] Adjusting unit, with the distal end of the bending part is connected, for controlling the bending direction of the bending part;

[0016] Suction unit, with the side surface of the fixed part is connected, and with the second passageway is communicated.

[0017] Beneficial effects: by connecting the suction unit with the side of the fixed part, while sealing the proximal end of the second channel, not only can the suction unit only communicate with the distal end of the first channel, but also can suck the first channel and the second channel, and avoid the position interference between the position of the non-adjustable bending catheter and the hand wheel, which causes the extension direction of the adjusting pull wire to be inclined, resulting in the jamming of the adjusting pull wire, affecting the angle adjustment of the adjustable bending catheter in the related art. The embodiment limits the communication between the suction unit and the side of the fixed part, so that the adjusting unit does not need to adjust the extension direction, that is, the included angle between the adjusting unit in the second channel and the adjusting unit outside the second channel is 180 degrees, thereby improving the smoothness of the adjusting unit in adjusting the angle of the bending part, and further achieving the technical effect of improving the reliability of the angle bending of the bending part.

[0018] In an optional embodiment, the bending part and the fixed part are integrally arranged;

[0019] And / or, the suction unit comprises:

[0020] The pipeline structure is connected with the fixed part, and the third channel is arranged in the pipeline structure;

[0021] And / or, the driving structure is communicated with the other end of the third channel, and is used for providing driving force to the first channel.

[0022] Beneficial effects: by arranging the pipeline structure, the driving structure can be communicated with the second channel, so that the driving structure can provide negative pressure to the first channel and the second channel to pass the thrombus to the outside of the patient through the first channel and the second channel.

[0023] In an optional embodiment, the pipeline structure is detachably connected with the fixed part;

[0024] And / or, the diameter of the third channel is not less than the diameter of the second channel.

[0025] Beneficial effects: by detachable connection between the pipeline structure and the fixed part, the pipeline structure or the fixed part can be replaced according to the size of the thrombus or other situations that occur during use of the adjustable bending thrombus aspiration catheter structure, thereby achieving the technical effect of improving the convenience of pipeline use;

[0026] By limiting the diameter of the third channel to be not less than the diameter of the second channel, the speed of the thrombus passing through the third channel can be improved, and the situation that the user needs to pull out the adjustable bending thrombus aspiration catheter structure from the patient's body for cleaning due to the blockage of the third channel is avoided, thereby improving the convenience and safety of the use of the adjustable bending thrombus aspiration catheter structure.

[0027] In an alternative embodiment, the adjustable bending thrombus aspiration catheter structure comprises:

[0028] The connecting unit comprises a main pipe and branch pipes, at least two branch pipes are provided, one end of the main pipe is connected with the pipe structure, the other end of the main pipe is communicated with each branch pipe, one branch pipe is communicated with the driving structure for communication between the driving structure and the second channel.

[0029] Beneficial effect: by limiting the branch pipes in the connecting unit to at least two, one branch pipe can be communicated with the driving structure, and the remaining branch pipes can be communicated with other structures, such as a syringe containing thrombolytic drugs. When the thrombus is large, the thrombolytic drugs can be injected into the thrombus position through the syringe, so as to dissolve the thrombus, thereby achieving the technical effect of improving the convenience of thrombus extraction.

[0030] In an alternative embodiment, the connecting unit comprises:

[0031] The valve is provided on the branch pipe, and the valve is used to control the communication between the main pipe and at least one of the two branch pipes.

[0032] Beneficial effect: by setting the valve, the main pipe can be prevented from being communicated with the first branch pipe and the second branch pipe at the same time. When the driving structure generates negative pressure, the negative pressure not only acts on the first branch pipe, but also acts on the second branch pipe, thereby reducing the adsorption force of the driving structure on the first channel and affecting the adsorption effect of the thrombus.

[0033] In an alternative embodiment, the side wall of the catheter body is internally provided with a mounting channel, and the adjusting unit comprises:

[0034] The adjusting structure is provided in the mounting channel, and a distal end of the adjusting structure is connected with a distal end of the bending part.

[0035] The control structure is provided outside the mounting channel, and the control structure is connected with a proximal end of the adjusting structure for driving the control structure to adjust the length of the adjusting structure by external force.

[0036] Beneficial effect: by the control structure, the length of the adjusting structure can be adjusted to adjust the state of the bending part, so that the bending part can present a bending state or a natural straight state.

[0037] In an alternative embodiment, the adjusting structure is provided with at least two along the circumferential direction of the catheter body.

[0038] And / or, the adjusting structure is fixedly connected with the control structure.

[0039] And / or, the adjustable bending thrombus aspiration catheter structure comprises:

[0040] A shell is provided with a containing cavity inside, the distal end of the fixed part is arranged in the containing cavity, and the shell is further provided with a mounting groove in communication with the containing cavity, and the control structure is arranged in the mounting groove.

[0041] Beneficial effect: by providing at least two sub-pipes, one sub-pipe can be connected with the driving structure, and the remaining sub-pipes can be connected with other structures, such as a syringe containing thrombolytic drugs. When the thrombus is large, the thrombolytic drugs can be injected into the thrombus position through the syringe, so as to dissolve the thrombus, thereby achieving the technical effect of improving the convenience of thrombus extraction.

[0042] By limiting the fixed connection between the adjustment structure and the control structure, the stability of the connection between the adjustment structure and the control structure can be improved.

[0043] The shell can protect the fixed part and the control structure, thereby improving the reliability of the use of the adjustable bending thrombus aspiration catheter structure.

[0044] In an optional embodiment, along the direction perpendicular to the axis of the catheter body, the center point of the adjacent adjustment structure and the center point of the section form an angle of 90°.

[0045] And / or, the control structure is rotationally connected in the shell.

[0046] In an optional embodiment, the number of adjustment structures corresponds to the number of control structures one by one, or two adjustment structures with an angle of 180° share one control structure.

[0047] And / or, the control structure comprises a driving part, a connecting part and a limiting part, one end of the connecting part is connected with the driving part, the other end of the connecting part is connected with the limiting part, the driving part and the connecting part are rotationally connected with the shell, the adjustment structure is wound on the connecting part, and the size of the connecting part is smaller than the size of the driving part and the size of the limiting part.

[0048] Beneficial effect: by limiting the direction of the plurality of adjustment structures, the number of directions that the adjustment structure can adjust is increased, so that the adjustable bending thrombus aspiration catheter structure can be accurately bent to the required direction, thereby improving the efficiency of thrombus extraction.

[0049] By limiting two adjustment structures to share one control structure, the number of adjustment structures can be reduced, thereby achieving the technical effect of improving the structural simplicity of the adjustable curved thrombus aspiration catheter structure.

[0050] By limiting the number of adjustment structures to correspond to the number of control structures, the position of the adjustment structure can be adjusted according to the control structure, avoiding damage to the patient's blood vessels caused by incorrect adjustment direction, thereby achieving the technical effect of improving the accuracy of adjustment.

[0051] By providing a driving part and a limiting part at both ends of the connecting part, the adjustment structure is always located between the driving part and the limiting part on the connecting part. Based on this, the technical effect of improving the stability of the position of the adjustment structure can be achieved, and the technical effect of improving the reliability of adjusting the bending angle of the curved part can be further achieved.

[0052] In an optional embodiment, the driving part is provided with a positioning part, and the positioning part is provided with a through hole. The adjustment structure is fixedly connected with the positioning part after passing through the through hole.

[0053] Beneficial effects: By providing a through hole on the positioning part, the adjustment structure can be fixedly connected with the positioning part only after passing through the through hole, which can improve the complexity of fixing the position of the adjustment structure, thereby achieving the technical effect of improving the stability of the fixing between the adjustment structure and the control structure. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0055] Figure 1 Structure diagram of four bending states and natural straightening state of the curved part of the adjustable curved thrombus aspiration catheter structure of the present embodiment Figure 1 ;

[0056] Figure 2 Structure diagram of four bending states and natural straightening state of the curved part of the adjustable curved thrombus aspiration catheter structure of the present embodiment Figure 2 ;

[0057] Figure 3 Connection diagram between the catheter main body and the connecting unit of the adjustable curved thrombus aspiration catheter structure of the present embodiment

[0058] Figure 4 Cross-sectional structure diagram of the catheter main body of the adjustable curved thrombus aspiration catheter structure of the present embodiment

[0059] Figure 5 Structure diagram of the adjusting structure in the adjustable bending thrombus aspiration catheter structure of the present embodiment;

[0060] Figure 6 Structure diagram of the adjusting structure in the adjustable bending thrombus aspiration catheter structure of the present embodiment; Figure 5 Cross-sectional view of A-A in the present embodiment;

[0061] Figure 7 Cross-sectional view of the catheter body in the adjustable bending thrombus aspiration catheter structure of the present embodiment;

[0062] Figure 8 Structure diagram of the adjusting structure in the adjustable bending thrombus aspiration catheter structure of the present embodiment; Figure 7 Enlarged view of B part in the present embodiment;

[0063] Figure 9 Structure diagram of the adjusting structure in the adjustable bending thrombus aspiration catheter structure of the present embodiment; Figure 7 Enlarged view of C part in the present embodiment;

[0064] Figure 10 Structure diagram of the adjusting structure in the adjustable bending thrombus aspiration catheter structure of the present embodiment;

[0065] Figure 11 Structure diagram of the adjusting structure in the adjustable bending thrombus aspiration catheter structure of the present embodiment; Figure 10 Cross-sectional view of D-D in the present embodiment.

[0066] Explanation of reference signs:

[0067] 1, catheter body; 101, bending part; 1011, lubricating layer, 1012, interlayer; 1013, outer layer; 10131, mounting channel; 102, fixed part;

[0068] 2, adjusting unit; 201, adjusting structure;

[0069] 202, control structure; 2021, driving part, 2022, connecting part; 2023, limiting part; 2024, protrusion; 2025, positioning part; 20251, through hole; 2026, positioning column;

[0070] 203, protection structure;

[0071] 3, aspiration unit; 4, developing unit;

[0072] 5, connecting unit; 501, main pipeline; 502, first branch pipeline; 503, second branch pipeline; 504, valve;

[0073] 6, shell; 601, mounting groove;

[0074] 7, stress release unit. DETAILED DESCRIPTION

[0075] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0076] The embodiments of the utility model will be described below in combination with Figures 1 to 11

[0077] According to the embodiments of the utility model, a kind of adjustable bending thrombus suction catheter structure is provided, comprising:

[0078] Catheter main body 1, including bending portion 101 and fixed part 102, the proximal end of bending portion 101 is connected with the distal end of fixed part 102, the distal end of bending portion 101 can be bent relative to fixed part 102, the inside of bending portion 101 is equipped with first passageway, the inside of fixed part 102 is equipped with second passageway, the distal end of first passageway is communicated with outside, the proximal end of first passageway is communicated with the distal end of second passageway, and the proximal end of second passageway is sealed;

[0079] Adjusting unit 2 is connected with the distal end of bending portion 101, for controlling the bending direction of bending portion 101;

[0080] Suction unit 3 is connected with the side surface of fixed part 102 and communicated with second passageway.

[0081] In the adjustable bending thrombus suction catheter structure of the embodiment, by connecting suction unit 3 with the side surface of fixed part 102, while the proximal end of second passageway is sealed, not only can the suction unit 3 be communicated with the distal end of first passageway only to realize the suction force given to first passageway and second passageway, but also solve the problem that in the related art, the extension direction of adjusting pull wire needs to avoid the interference between the position of non-adjustable bending catheter and hand wheel, so that the extension direction of adjusting pull wire is inclined, causing the adjusting pull wire to be jammed, affecting the angle adjustment of adjustable bending catheter in the related art, so that the included angle between adjusting unit 2 in second passageway and adjusting unit 2 outside second passageway in the embodiment is 180 degrees without adjusting the extension direction of adjusting unit 2, thereby improving the smoothness of adjusting unit 2 for angle adjustment of bending portion 101, and further achieving the technical effect of improving the reliability of angle bending of bending portion 101.

[0082] ​In this embodiment, the proximal end refers to the end of the adjustable thrombus aspiration catheter structure that is closer to the user when it is located in the patient's body, and the distal end refers to the end of the adjustable thrombus aspiration catheter structure that is farther away from the user when it is located in the patient's body. The side of the fixing part 102 is provided with a fixing hole that communicates with the second channel. The aspiration unit 3 communicates with the fixing hole, thereby realizing the communication between the aspiration unit 3 and the second channel.

[0083] Furthermore, in this embodiment, the adjustable-bend thrombus aspiration catheter structure is used to aspirate thrombi from the patient's body to the outside of the body. Of course, in other embodiments, the application scenarios of the adjustable-bend thrombus aspiration catheter structure can be adjusted and replaced as needed.

[0084] Furthermore, in this embodiment, the length of the bent portion 101, that is, the length of the bent portion 101 along... Figure 2 The vertical dimension shown is within the range of 30mm-50mm. Furthermore, in other embodiments, the length of the bend 101 is adjusted depending on the design of the adjustable bend thrombus aspiration catheter structure.

[0085] In addition, combined Figure 4 As shown, both the bending part 101 and the fixing part 102 have a four-layer structure from the inside to the outside. Taking the bending part 101 as an example, the bending part 101 consists of a first channel, a lubrication layer 1011, an interlayer 1012 and an outer layer 1013 from the inside to the outside.

[0086] The lubricating layer 1011 is made of a lubricating material, such as a PTFE (Polytetrafluoroethylene) layer or an HDPE (High Density Polyethylene) layer, or other polymers with lubricating function. The fixed part 102 has the same structure as the bent part 101, and will not be described in detail here.

[0087] The interlayer 1012 is made of metal coil braid. A metal coil is wound around the outside of the lubrication layer 1011 to support the first channel and the second channel, ensuring the stability of the first channel and the second channel and preventing the first channel and the second channel from collapsing and affecting the use of the adjustable thrombus aspiration catheter structure. This achieves the technical effect of improving the reliability of the adjustable thrombus aspiration catheter structure.

[0088] At the distal end of the adjustable thrombus aspiration catheter structure, along Figure 7The length of the sandwich layer 1012 can be less than the length of the outer layer 1013 in the vertical direction shown, avoiding the exposure of the sandwich layer 1012 from causing scratches to the blood vessels, thereby achieving the technical effect of improving the protection of the patient's blood vessels. At the same time, the lengths of the lubricating layer 1011, the adjusting structure 201, and the protective structure 203 can also be less than the length of the outer layer 1013, or adjusted as needed.

[0089] Further, a cross section is taken along the length direction of the metal coil, i.e., along the Figure 3 The cross section of the metal coil is a flat structure in the horizontal direction shown, for example, the cross-sectional width is one-third of the cross-sectional length, and the cross-sectional length is within the range of 0.12mm-0.3mm, and the cross-sectional width is within the range of 0.04mm-0.1mm. Based on this, the width dimension of the metal coil can be reduced, thereby reducing the space occupied by the metal coil, and also avoiding the collapse of the first channel and the second channel, thereby achieving the technical effect of improving the reliability of the catheter main body 1.

[0090] Further, the distance between adjacent metal coils wound on the fixed portion 102 is 2 times the cross-sectional length in the direction perpendicular to the winding direction of the metal coil. The distance between adjacent metal coils wound on the curved portion 101 is 2.5-3 times the cross-sectional length in the direction perpendicular to the winding direction of the metal coil, to ensure that the sandwich layer 1012 can bend along with the curved portion 101;

[0091] At the same time, the hardness of the outer layer 1013 gradually decreases from the distal end to the proximal end, based on which the hardness of the catheter main body 1 decreases gradually, ensuring that the catheter main body 1 is stably pushed into the blood vessels. In this embodiment, the materials of the outer layer 1013 from the distal end to the proximal end are TPU (Thermoplastic Polyurethane), PEBAX (Polyether Block Amide), and PA (Polyamide), respectively. The softness of TPU can reduce the damage to the patient's blood vessels. It should be noted that PEBAX is a type of nylon.

[0092] Further, the outer layer 1013 can be divided into 8 segments, from the distal end to the proximal end, TT-1074A (Thermoplastic Polyurethane), ME55 (Nylon), ME40 (Nylon), PEBAX5533 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX5533 (Polyether Block Amide), and PEBAX5533 (Polyether Block Amide) are blended, respectively. TT-1074A, Thermoplastic Polyurethane), ME55 (Nylon), ME40 (Nylon), PEBAX5533 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX5533 (Polyether Block Amide), and PEBAX5533 (Polyether Block Amide) are blended, respectively. Care ME55, Nylon), ME40 (Nylon), PEBAX5533 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX5533 (Polyether Block Amide), and PEBAX5533 (Polyether Block Amide) are blended, respectively. Care ME40, Nylon), PEBAX5533 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX5533 (Polyether Block Amide), and PEBAX5533 (Polyether Block Amide) are blended, respectively. SA01MED, Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX6333 (Polyether Block Amide), PEBAX5533 (Polyether Block Amide), and PEBAX5533 (Polyether Block Amide) are blended, respectively. SA 01MED, polyether block amide) and PEBAX 5533 SA 01MED, polyether block amide) and PEBAX 6333 SA 01MED, polyether block amide) and PEBAX 7433 SA 01MED, polyether block amide) and PEBAX 6333 SA 01MED, polyether block amide) and ME 71 Care ME 71, nylon) and ME 62 Care ME 62, nylon) and ME 71 Care ME 71, nylon); by dividing the outer layer 1013 into 8 different materials, the technical effect of improving the gradualness of the hardness change of the outer layer 1013 is achieved.

[0093] In addition to the TPU material, the hardness difference between adjacent segments is not more than 10A of Shore hardness. Further, among the 8 segments in the outer layer 1013, 20% of barium sulfate is added to each segment, so that other external devices, such as an X-ray machine, detect the position of the adjustable bending thrombus aspiration catheter structure in the patient's body, and 0.5% of anti-UV agent, 0.25% of anti-aging agent, and 1% of lubricant are added to each segment, to improve the service life and physical properties of the outer layer 1013, and reduce the friction between the outer layer 1013 and the patient's blood vessels, thereby achieving the technical effect of reducing the difficulty of the adjustable bending thrombus aspiration catheter structure entering the patient's body. For example, PEBAX 7433 and PEBAX 6333 are blended, assuming that the total mass m of PEBAX 7433, PEBAX 6333, barium sulfate, anti-UV agent, anti-aging agent, and lubricant after blending is 100g, then 20% of barium sulfate means the mass m1 of barium sulfate is 20% x m = 20g, 0.5% of anti-UV agent means the mass m2 of anti-UV agent is 0.5% x m = 0.5g, 0.25% of anti-aging agent means the mass m3 of anti-aging agent is 0.25% x m = 0.25g, and 1% of lubricant means the mass m4 of lubricant is 1% x m = 1g, then the total mass of PEBAX 7433 and PEBAX 6333 is 100g - 20g - 0.5g - 0.25g - 1g = 78.25g.

[0094] At the same time, the types of anti-UV agent, anti-aging agent, and lubricant can be adjusted as needed, which is not limited here.

[0095] Further, in this embodiment, the 8-segment outer layer 1013 is only divided for the sake of convenience of different materials, i.e., the 8-segment outer layer 1013 is integrally provided.

[0096] Further, in the embodiment, the blending ratio is 1:1. For example, PEBAX7433 is blended with PEBAX6333, i.e. the mass m5 of PEBAX7433 = the mass m6 of PEBAX6333 = 78.25g / 2 = 39.125g.

[0097] Preferably, in the embodiment, a super-smooth coating layer can be arranged on the outer surface of the outer layer 1013. Specifically, the super-smooth coating layer is arranged at the distal end of the catheter body 1, and along the axial direction of the adjustable bending thrombus aspiration catheter structure, i.e. along the vertical direction shown in Figure 2 The length of the super-smooth coating layer is in the range of 20%-65% of the length of the adjustable bending thrombus aspiration catheter structure, for example, the super-smooth coating layer is a polyvinylpyrrolidone coating layer or other hydrophilic lubricating coating layer, which further reduces the friction between the catheter body 1 and the blood vessel, thereby achieving the technical effect of improving the protection of the patient's blood vessel.

[0098] Of course, in other embodiments, the number of layers of the bending part 101 and the fixed part 102 can be adjusted as needed, and the material of the lubricating layer 1011, the material and structure of the interlayer 1012, the length relationship between the lubricating layer 1011 and the outer layer 1013, the length relationship between the adjustment structure 201 and the outer layer 1013, the length relationship between the protection structure 203 and the outer layer 1013, the size relationship between the cross-sectional length and the cross-sectional width, the distance between adjacent metal coils, the material of the outer layer 1013, the number of segments of the outer layer 1013, and the connection mode between the segments can also be adjusted.

[0099] In other embodiments, the blending ratio of the mixture can be adjusted according to the design of the adjustable bending thrombus aspiration catheter structure.

[0100] In addition, in the embodiment, the bending part 101 and the fixed part 102 are integrally arranged. Of course, in other embodiments, the bending part 101 and the fixed part 102 can be detachably connected according to the design of the adjustable bending thrombus aspiration catheter structure. The detachable connection is a mature technology and will not be limited here. Compared with other embodiments, in the embodiment, by limiting the bending part 101 and the fixed part 102 to be integrally arranged, the stability of the connection position between the bending part 101 and the fixed part 102 can be improved, thereby achieving the technical effect of improving the reliability of the connection between the bending part 101 and the fixed part 102.

[0101] In addition, in the embodiment, the aspiration unit 3 includes: Figure 3

[0102] The pipe structure is connected with the fixed part 102, and the inside of the pipe structure is provided with a third channel, one end of the third channel is communicated with the second channel through a fixing hole;

[0103] ​The driving structure is communicated with the other end of the third channel, and is used for providing driving force to the first channel.

[0104] The driving structure is communicated with the other end of the third channel, and is used for providing driving force to the first channel.

[0105] The driving structure and the pipeline structure are detachably connected, and the driving structure and the pipeline structure are provided with threads.

[0106] Of course, in other embodiments, the driving structure and the pipeline structure can be integrally arranged according to different designs of the adjustable bending thrombus aspiration catheter structure.

[0107] In other embodiments, the detachable connection mode between the driving structure and the pipeline structure can be adjusted according to different designs of the adjustable bending thrombus aspiration catheter structure, for example, the driving structure is inserted into the inside of the pipeline structure, which is not limited herein.

[0108] Of course, in other embodiments, one or more combinations of the integrally arranged bending part 101 and fixing part 102, the pipeline structure and the driving structure can be limited, which are within the protection scope of the present application.

[0109] In addition, in the present embodiment, the driving structure is a negative pressure vacuum pump, of course, in other embodiments, the type of the driving structure can be adjusted according to different designs of the adjustable bending thrombus aspiration catheter structure, for example, the driving structure can be a 30ml-60ml syringe without a needle, which can also achieve the technical effect of aspirating the thrombus into the inside of the catheter main body 1.

[0110] In addition, in the present embodiment, the pipeline structure and the fixing part 102 are detachably connected, based on which, the pipeline structure or the fixing part 102 can be replaced according to the size of the thrombus or other situations occurred in the use process of the adjustable bending thrombus aspiration catheter structure, thereby achieving the technical effect of improving the convenience of pipeline use.

[0111] The pipeline structure and the fixing part 102 are provided with threads, and the detachable connection between the pipeline structure and the fixing part 102 is realized through the thread connection between the pipeline structure and the fixing part 102.

[0112] Of course, in other embodiments, the detachable connection between the pipe structure and the fixed part 102 can be adjusted according to the design of the adjustable curved thrombus aspiration catheter structure, for example, threaded holes are arranged on the pipe structure and the fixed part 102, and the pipe structure and the fixed part 102 are threadedly connected by bolts to realize the detachable connection between the pipe structure and the fixed part 102.

[0113] In other embodiments, the pipe structure and the fixed part 102 can be integrally arranged.

[0114] Preferably, the diameter of the third channel is larger than the diameter of the second channel, that is, the inner diameter of the pipe structure is larger than the inner diameter of the fixed part 102. Based on this, the speed of the thrombus passing through the third channel can be improved, avoiding the situation that the user needs to pull out the adjustable curved thrombus aspiration catheter structure from the patient's body for cleaning due to the blockage of the third channel, increasing the patient's pain and operation time, thereby improving the convenience and safety of using the adjustable curved thrombus aspiration catheter structure.

[0115] Among them, the diameter of the third channel can be 4mm, and at this time the diameter of the second channel is less than 4mm.

[0116] Of course, in other embodiments, the diameter of the third channel can be equal to the diameter of the second channel.

[0117] In other embodiments, the size of the third channel can be smaller than the size of the second channel according to the design of the adjustable curved thrombus aspiration catheter structure, which is within the protection scope of the present application.

[0118] In other embodiments, according to the design of the adjustable curved thrombus aspiration catheter structure, the pipe structure and the fixed part 102 can be detachably connected, or only the diameter of the third channel is not less than the diameter of the second channel.

[0119] In addition, as shown in FIG. 1, Figure 3 In this embodiment, the adjustable curved thrombus aspiration catheter structure comprises:

[0120] The connection unit 5 comprises a main pipe 501 and a branch pipe, and the branch pipe is provided with at least two, one end of the main pipe 501 is connected with the pipe structure, and the other end of the main pipe 501 is communicated with each branch pipe, and one branch pipe is communicated with the driving structure for the communication between the driving structure and the second channel.

[0121] By arranging at least two branch pipes, one branch pipe can be communicated with the driving structure, and the remaining branch pipes can be communicated with other structures, for example, a syringe containing thrombolytic drugs. When the thrombus is large, the thrombolytic drugs are injected into the thrombus position through the syringe, so that the thrombus can be dissolved, thereby achieving the technical effect of improving the convenience of thrombus extraction.

[0122] In the embodiment, the main pipeline 501 and the branch pipeline are integrally arranged, so as to improve the sealing performance of the connection position between the main pipeline 501 and the branch pipeline. Meanwhile, the main pipeline 501 and the pipeline structure are detachably connected, so as to facilitate the disassembly and replacement of the main pipeline 501 and the pipeline structure.

[0123] Further, in the embodiment, the branch pipeline can be provided with two, i.e., a first branch pipeline 502 and a second branch pipeline 503. The first branch pipeline 502 is in communication with the driving structure, and the second branch pipeline 503 is in communication with the syringe with liquid.

[0124] The liquid can be normal saline, thrombolytic drugs or other fluids required in the operation, which is not limited here.

[0125] Further, the main pipeline 501, the first branch pipeline 502 and the second branch pipeline 503 are each provided with a sealing structure, for example, the sealing structure can be a luer joint. The luer joint can not only improve the connection tightness between the main pipeline 501 and the pipeline structure, between the first branch pipeline 502 and the driving structure and between the second branch pipeline 503 and the syringe with liquid, but also improve the technical effect of facilitating the connection.

[0126] Of course, in other embodiments, the type of sealing structure can be adjusted according to the design of the adjustable bending thrombus aspiration catheter structure, for example, the sealing structure can be a thread, and the number of branch pipelines can also be adjusted.

[0127] In other embodiments, the connection mode between the main pipeline 501 and the branch pipeline can be adjusted according to the design of the adjustable bending thrombus aspiration catheter structure, for example, the main pipeline 501 and the branch pipeline can be detachably connected.

[0128] In other embodiments, the main pipeline 501 and the pipeline structure are integrally arranged according to the design of the adjustable bending thrombus aspiration catheter structure.

[0129] In addition, as shown in FIG. 5, in the embodiment, the connection unit 5 comprises: Figure 3

[0130] The valve 504 is arranged on the branch pipeline, and is used to control the communication between the main pipeline 501 and one of the branch pipelines, i.e., to control the communication between the main pipeline 501 and the first branch pipeline 502 or the communication between the main pipeline 501 and the second branch pipeline 503. Based on this, the main pipeline 501 and the first branch pipeline 502 and the second branch pipeline 503 can be prevented from being simultaneously communicated. When the driving structure generates negative pressure, the negative pressure not only acts in the first branch pipeline 502, but also acts on the second branch pipeline 503, which reduces the adsorption force of the driving structure on the first channel and affects the adsorption effect of the thrombus.​

[0131] In this embodiment, valve 504 is located at the connection point between the main pipe 501 and each branch pipe, and valve 504 can be a plug valve. Of course, in other embodiments, depending on the design of the adjustable bend thrombus aspiration catheter, valve 504 can be located on each branch pipe. For example, valve 504 can be a solenoid valve, which can also achieve connection between the main pipe 501 and one of the branch pipes.

[0132] Of course, in other embodiments, depending on the design of the adjustable thrombus aspiration catheter structure, the adjustable thrombus aspiration catheter structure may not include the connecting unit 5, and the pipeline structure may be directly connected to the drive structure.

[0133] In other embodiments, depending on the design of the adjustable thrombus aspiration catheter structure, the adjustable thrombus aspiration catheter structure may not include valve 504. When it is necessary for the main pipe 501 to be connected to the first branch pipe 502, the second branch pipe 503 is blocked. Similarly, when it is necessary for the main pipe 501 to be connected to the second branch pipe 503, the first branch pipe 502 is blocked. This can also achieve the connection between the main pipe 501 and one of the first branch pipe 502 and the second branch pipe 503.

[0134] In addition, in this embodiment, along Figure 2 A cross-section is shown in the horizontal direction, and the catheter body 1 is annular. Of course, in other embodiments, the shape of the catheter body 1 can be adjusted according to the different designs of the adjustable bend thrombus aspiration catheter structure. Compared with other embodiments, the outer surface of the catheter body 1 in this embodiment is curved, so that there are no sharp points on the surface of the catheter body 1, thereby improving the smoothness of the catheter body 1 entering the blood vessel, and thus achieving the technical effect of improving the protection of the patient's blood vessels.

[0135] In addition, combined Figures 7 to 9 As shown, in this embodiment, the inner sidewall of the catheter body 1 is provided with an installation channel 10131, that is, the inner sidewall of the outer layer 1013 is provided with an installation channel 10131, and the adjustment unit 2 includes:

[0136] An adjustment structure 201 is disposed within the installation channel 10131, and the distal end of the adjustment structure 201 is connected to the distal end of the bending portion 101.

[0137] The control structure 202 is located outside the installation channel 10131. The control structure 202 is connected to the proximal end of the adjustment structure 201 and is used to drive the control structure 202 to adjust the length of the adjustment structure 201 by external force.

[0138] Among them, along Figure 7In the vertical direction of the installation channel 10131, the installation channel 10131 does not penetrate the bottom of the catheter body 1, so that the adjusting structure 201 is fixedly connected to the bottom wall of the installation channel 10131, that is, the adjusting structure 201 and the distal end of the bending portion 101 are connected. The fixed connection is a mature technology and will not be limited here.

[0139] The length of the adjusting structure 201 can be adjusted by the control structure 202 to adjust the state of the bending portion 101, so that the bending portion 101 can present a bending state or a natural straight state.

[0140] At the same time, the adjusting structure 201 placed in the second channel naturally extends to the control structure 202, so that the included angle between the adjusting unit 2 in the second channel and the adjusting unit 2 outside the second channel is 180 degrees, thereby improving the smoothness of the adjusting unit 2 adjusting the angle of the bending portion 101, and further achieving the technical effect of improving the reliability of the angle bending of the bending portion 101.

[0141] Specifically, the adjusting structure 201 is a metal coil, for example, a stainless steel round wire, that is, the metal coil is cylindrical.

[0142] Further, in the embodiment, the outer diameter of the metal coil is in the range of 0.01mm-0.04mm.

[0143] Preferably, the adjusting structure 201 is woven from 6-8 metal coils, based on which the technical effect of the tensile strength of the adjusting structure 201 can be achieved.

[0144] Of course, in other embodiments, according to the design of the adjustable bending thrombus aspiration catheter structure, the material, shape, outer diameter and number of strands of the adjusting structure 201 are adjusted.

[0145] In other embodiments, according to the design of the adjustable bending thrombus aspiration catheter structure, the control structure 202 can not be provided, and the bending and straightening of the bending portion 101 can be achieved by pulling the adjusting structure 201 by external force.

[0146] In addition, in combination with Figure 4 As shown in the figure, in the embodiment, the adjusting structure 201 is provided along the circumferential direction of the catheter body 1, and based on this, the number of adjusting structures 201 can be increased to increase the number of bending directions of the adjustable bending thrombus aspiration catheter structure, improve the number of bending directions of the adjustable bending thrombus aspiration catheter structure, and improve the flexibility of the adjustable bending thrombus aspiration catheter structure. The adjustable bending thrombus aspiration catheter structure can accurately aspirate thrombus to the outside of the patient, saving the operation time, thereby achieving the technical effects of reducing the time of radiation exposure and reducing the pain of the patient.

[0147] Further, in combination with Figure 4As shown, in the four adjusting structures 201, the angle between the center of the cross section and the center line of the adjacent adjusting structure 201 is 90°. The center of the cross section is the center of the first channel, and the center line of one adjusting structure 201 and the center line of another adjusting structure 201 are 90°. Based on this, the number of directions that the adjusting structure 201 can adjust is increased, so that the adjustable bending thrombus aspiration catheter structure can be accurately bent to the required direction, thereby achieving the technical effect of improving the efficiency of thrombus aspiration.

[0148] Preferably, in the present embodiment, the two adjusting structures 201 with an included angle of 180° share one control structure 202.

[0149] Specifically, the adjusting structure 201 is divided into two sections in the horizontal direction. Figure 10 As shown, the two sections are used to wind one of the two adjusting structures 201 with an included angle of 180°, and the other end is used to wind the other adjusting structure 201. At the same time, the winding directions of the two sections of the adjusting structure 201 are opposite, that is, one adjusting structure 201 is wound clockwise, and the other adjusting structure 201 is wound counterclockwise. The clockwise and counterclockwise directions can be defined according to the actual situation, so that the two rotation directions of the control structure 202 can correspond to the length adjustment of one adjusting structure 201 respectively, thereby realizing the rotation control of one control structure 202 to the length adjustment of two adjusting structures 201, for example, in combination with Figure 2 As shown, the control structure 202 located above rotates to the right, the length of one adjusting structure 201 is shortened, and the length of the other adjusting structure 201 is lengthened, so that the bending part 101 bends to the right. The control structure 202 rotates to the left, the length of the other adjusting structure 201 is shortened, and the length of one adjusting structure 201 is lengthened, so that the bending part 101 bends to the left. The number of adjusting structures 201 can be reduced, thereby achieving the technical effect of improving the structural simplicity of the adjustable bending thrombus aspiration catheter structure.

[0150] Of course, in other embodiments, the bending direction of the adjusting structure 201 corresponding to the rotation direction of the control structure 202 is adjusted according to the design of the adjustable bending thrombus aspiration catheter structure.

[0151] In other embodiments, the number and position of the adjusting structure 201 are adjusted according to the design of the adjustable bending thrombus aspiration catheter structure.

[0152] At the same time, in other embodiments, the number of adjusting structures 201 corresponds to the number of control structures 202 according to the design of the adjustable bending thrombus aspiration catheter structure.

[0153] In addition, in combination with Figure 1As shown in the embodiment, the adjustable bending thrombus aspiration catheter structure comprises:

[0154] The shell 6 is provided with a containing cavity in which the proximal end of the fixing part 102 is arranged, and is further provided with a mounting groove 601 which is in communication with the containing cavity and in which the control structure 202 is arranged, that is, one end of the control structure 202 is arranged in the mounting groove 601 and the other end of the control structure 202 is arranged outside the mounting groove 601.

[0155] The shell 6 can protect the fixing part 102 and the control structure 202, thereby achieving the technical effect of improving the reliability of the adjustable bending thrombus aspiration catheter structure.

[0156] Of course, in other embodiments, the shell 6 can not be arranged according to the design of the adjustable bending thrombus aspiration catheter structure.

[0157] In addition, in combination with Figures 1 to 3 As shown, the shell 6 is provided with a stress release unit 7 on the side close to the fixing part 102, and the stress release unit 7 is sleeved on the fixing part 102, which can improve the bending resistance of the connection position between the catheter main body 1 and the shell 6, thereby achieving the technical effect of improving the reliability of the adjustable bending thrombus aspiration catheter structure.

[0158] Preferably, in the embodiment, the stress release unit 7 is made of silicone. As a variable implementation, the stress release unit 7 can be made of Pebax (Polyether block amide).

[0159] Of course, in other embodiments, the material of the stress release unit 7 can be adjusted according to the design of the adjustable bending thrombus aspiration catheter structure, for example, soft polymer materials with a hardness of 35D-55D are all within the protection scope of the present application.

[0160] In addition, in combination with Figure 10 and Figure 11As shown, in the embodiment, the control structure 202 comprises a driving part 2021, a connecting part 2022, and a limiting part 2023, one end of the connecting part 2022 is connected with the driving part 2021, the connecting part 2022 is connected with the limiting part 2023, the adjusting structure 201 is wound on the connecting part 2022, and the size of the connecting part 2022 is smaller than the size of the driving part 2021 and the size of the limiting part 2023. Based on this, the adjusting structure 201 is always located on the connecting part 2022 between the driving part 2021 and the limiting part 2023 through the cooperation between the driving part 2021 and the limiting part 2023. Based on this, the technical effect of improving the stability of the position of the adjusting structure 201 can be achieved, and the technical effect of improving the reliability of the adjustment of the bending angle of the bending part 101 can be further achieved.

[0161] Wherein, the control structure 202 is rotationally connected in the shell 6, that is, the driving part 2021, the connecting part 2022, and the limiting part 2023 are all rotationally connected with the shell 6. Through the rotation of the control structure 202, the adjusting structure 201 is wound on the control structure 202 or the adjusting structure 201 is separated from the control structure 202, that is, the adjustment of the length of the adjusting structure 201 is realized to realize the technical effect of adjusting the angle of the bending part 101.

[0162] Specifically, in combination with Figure 10 As shown, the right end of the connecting part 2022 extends between the driving part 2021 and the limiting part 2023, and the connecting part 2022 can be rotationally connected in the shell 6 to realize the rotational connection of the control structure 202 in the shell 6 without the need to set other rotating structures, thereby achieving the technical effect of improving the convenience of using the adjustable bending thrombus aspiration catheter structure. As a changeable embodiment, an additional rotating structure connected with the limiting part 2023 or the driving part 2021 can also be provided to achieve the rotational connection between the control structure 202 and the shell 6.

[0163] Further, the control structure 202 is in the shape of a hand wheel, which can achieve the technical effect of improving the convenience of rotating the control structure 202.

[0164] Specifically, in the embodiment, the surface of the control structure 202 is provided with a plurality of protrusions 2024, that is, the surface of the driving part 2021 is provided with a plurality of protrusions 2024. Based on this, the friction between the user and the control structure 202 can be improved, thereby achieving the technical effect of improving the stability of the external force driving the control structure 202.

[0165] Of course, in other embodiments, the surface of the control structure 202 can not be provided with a plurality of protrusions 2024. Meanwhile, in other embodiments, the connection mode between the control structure 202 and the shell 6 can be adjusted according to the different designs of the adjustable bending thrombus aspiration catheter structure.

[0166] In other embodiments, according to the design of the adjustable bending thrombus aspiration catheter structure, only the angle between the center line of the adjacent adjustment structure 201 and the cross section perpendicular to the axis of the catheter body 1 is 90°, or only the control structure 202 is rotationally connected in the shell 6.

[0167] In other embodiments, only the relationship between the number of adjustment structures 201 and the number of control structures 202 can be defined, or only the composition of the control structure 202 can be defined.

[0168] In addition, in the present embodiment, the adjustment structure 201 and the control structure 202 are fixedly connected, that is, the adjustment structure 201 and the connecting portion 2022 are fixedly connected, based on which the technical effect of improving the stability of the connection between the adjustment structure 201 and the control structure 202 can be achieved.

[0169] Among them, the driving portion 2021 is provided with a positioning portion 2025, and the positioning portion 2025 is provided with a through hole 20251, and the adjustment structure 201 is fixedly connected with the positioning portion 2025 after passing through the through hole 20251.

[0170] Among them, the adjustment structure 201 is welded on the positioning portion 2025 after passing through the through hole 20251, based on which the technical effect of improving the connection reliability between the adjustment structure 201 and the positioning portion 2025 can be achieved.

[0171] Further, the connecting portion 2022 is provided with a positioning plate and a plurality of positioning columns 2026 in the circumferential direction, the positioning plate is fixedly connected with the driving portion 2021, and the plurality of positioning columns 2026 are arranged on the outer side of the connecting portion 2022. Based on this, the adjustment structure 201 can be wound around the positioning column 2026 and the connecting portion 2022 in the shape of "8", thereby achieving the technical effect of improving the stability of the position of the adjustment structure 201.

[0172] Of course, in other embodiments, the connection mode between the adjustment structure 201 and the control structure 202 can be adjusted according to the design of the adjustable bending thrombus aspiration catheter structure, or only the positioning column 2026 can be provided without the positioning plate, or the positioning column 2026 can not be provided.

[0173] In other embodiments, according to the design of the adjustable bending thrombus aspiration catheter structure, one or more of the driving portion 2021, the limiting portion 2023 and the connecting portion 2022 are provided with the positioning portion 2025. At the same time, in other embodiments, the adjustment structure 201 and the control structure 202 can be detachably connected.

[0174] In other embodiments, the winding path of the adjustment structure 201 is adjusted according to the design of the adjustable bending thrombus aspiration catheter structure.

[0175] In other embodiments, according to the design of the adjustable bending thrombus aspiration catheter structure, only two adjustment structures 201 are defined along the circumferential direction of the catheter body 1, or only the adjustment structure 201 is fixedly connected with the control structure 202, or only the adjustable bending thrombus aspiration catheter structure includes the shell 6.

[0176] In other embodiments, the fixing structure between the control structure 202 and the adjustment structure 201 is adjusted according to the design of the adjustable bending thrombus aspiration catheter structure.

[0177] In addition, in the present embodiment, the positioning portion 2025 is made of a weldable metal, and the remaining control structure 202 and the shell 6 are made of a combination of polycarbonate, polyformaldehyde, nylon, etc.

[0178] In other embodiments, the material of the control structure 202 and the shell 6 is adjusted according to the design of the adjustable bending thrombus aspiration catheter structure.

[0179] In addition, in combination with the embodiments shown in Figures 1 to 3 and Figure 9 In the present embodiment, the adjustable bending thrombus aspiration catheter structure includes:

[0180] The imaging unit 4 is arranged on the inner side of the catheter body 1, so that the position of the adjustable bending thrombus aspiration catheter structure in the patient's body is detected by other external equipment, for example, the external equipment is an X-ray machine, which can achieve the technical effect of improving the accuracy of detecting the position of the adjustable bending thrombus aspiration catheter structure. In order to better reflect the position of the imaging unit 4, Figures 1 to 3 The imaging unit 4 is marked on the surface of the catheter body 1.

[0181] The imaging unit 4 can be made of platinum-iridium alloy, and the imaging unit 4 is annular, which can increase the connection area between the imaging unit 4 and the catheter body 1, and further achieve the technical effect of improving the connection stability between the imaging unit 4 and the catheter body 1.

[0182] Preferably, the length of the imaging unit 4 is within the range of 0.8mm-1.5mm along the axial direction of the catheter body 1, i.e. along the vertical direction shown in Figure 2 Of course, in other embodiments, the length of the imaging unit 4 is adjusted according to the design of the adjustable bending thrombus aspiration catheter structure.

[0183] Further, the developing unit 4 is fixedly connected to the inner side of the distal end of the adjusting structure 201. Specifically, the developing unit 4 is arranged inside the mounting channel 10131 between the adjusting structure 201 and the interlayer 1012. The distal end of the adjusting structure 201 can be flattened by a metal forging press. The flattened length can be equal to the length of the developing unit 4. Based on this, the connection area between the adjusting structure 201 and the developing unit 4 can be improved, thereby achieving the technical effect of improving the stability of the connection between the adjusting structure 201 and the developing unit 4.

[0184] The adjusting structure 201 can be fixed on the developing unit 4 by a laser welding machine, for example, a fiber laser welding machine. Based on this, the technical effect of improving the stability of the connection between the adjusting structure 201 and the developing unit 4 can be achieved.

[0185] Of course, in other embodiments, the flattened length of the adjusting structure 201 can be adjusted according to the design of the adjustable bending thrombus aspiration catheter structure.

[0186] In other embodiments, the type of the developing unit 4 can be adjusted. For example, the developing unit 4 is made of high-density materials such as metal tantalum or metal gold, or is a mixture of one or more of platinum-iridium alloy, metal tantalum, and metal gold. Alternatively, the position of the developing unit 4 can be adjusted, for example, arranged on the surface of the catheter main body 1.

[0187] In addition, in combination with Figure 8 As shown in FIG. 1, the adjusting unit 2 further includes:

[0188] The protection structure 203 is a ring structure. The thickness of the inner wall and the outer wall of the ring structure is in the range of 0.015mm-0.04mm. The protection structure 203 is arranged inside the mounting channel 10131. The adjusting structure 201 is arranged inside the ring structure of the protection structure 203, so that the adjusting structure 201 can slide along the protection structure 203, thereby achieving the technical effect of protecting the adjusting structure 201.

[0189] Preferably, the gap between the adjusting structure 201 and the protection structure 203 is in the range of 0.03mm-0.05mm, thereby improving the smoothness of the adjusting structure 201 sliding in the protection structure 203.

[0190] In this embodiment, the protection structure 203 is made of PI (Polyimide, Polyimide) material.

[0191] Of course, in other embodiments, the protection structure 203 can not be arranged according to the design of the adjustable bending thrombus aspiration catheter structure.

[0192] In other embodiments, according to the design of the adjustable bending thrombus aspiration catheter structure, the material of the protection structure 203, the gap size between the adjustment structure 201 and the protection structure 203 is adjusted. For example, the material of the protection structure 203 can be made of polytetrafluoroethylene material or polyether ether ketone material.

[0193] The process of thrombus aspiration using the adjustable bending thrombus aspiration catheter structure of the present embodiment is as follows:

[0194] 1) Take out and activate the super-smooth coating, connect and fix the pipeline structure and the fixed part 102, and connect the syringe with liquid and the second sub-pipeline 503;

[0195] 2) Place the adjustable bending thrombus aspiration catheter structure into the patient's body and at the site of thrombus formation, i.e. the target blood vessel, and when the distal end of the fixed part 102 approaches the thrombus, connect the driving structure and the first passage.

[0196] 3) During the approach to the lesion, if the target blood vessel is relatively tortuous, control the bending direction of the suction unit 3 through the control structure 202, so that the angle of the distal end of the catheter body 1 is consistent with the shape of the target blood vessel, and the adjustable bending thrombus aspiration catheter structure can be gently pushed into the target blood vessel without the guidance of a guide wire, saving the cost of the operation;

[0197] 4) After reaching the thrombus position, control the distance between the distal end of the catheter body 1 and the thrombus to be within the range of 1mm-2mm, open the driving structure, and aspirate the thrombus out of the body, and close the control structure 202. When there is residual thrombus or multiple thrombi in the blood vessel, the bending direction of the bending part 101 can be adjusted in time, so that the distance between the distal end of the catheter body 1 and the thrombus is within the range of 1mm-2mm, the driving structure is opened, the thrombus is aspirated out of the body, the control structure 202 is closed, and the thrombus is completely aspirated out of the patient's body.

[0198] 5) After the treatment is completed, when the adjustable bending thrombus aspiration catheter structure is withdrawn out of the patient's body, the driving structure is opened to avoid the residual thrombus in the adjustable bending thrombus aspiration catheter structure from entering the blood vessel, causing artificial embolism, thereby achieving the technical effect of improving the thoroughness of thrombus removal.

[0199] Although the embodiments of the present application have been described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. An adjustable bend thrombectomy catheter structure, comprising: The application relates to a bendable thrombus suction catheter structure. The bendable thrombus suction catheter structure comprises: A catheter body (1) comprising a bending part (101) and a fixing part (102), the proximal end of the bending part (101) being connected with the distal end of the fixing part (102), the distal end of the bending part (101) being capable of being bent relative to the fixing part (102), the inside of the bending part (101) being provided with a first channel, the inside of the fixing part (102) being provided with a second channel, the distal end of the first channel being communicated with the outside, the proximal end of the first channel being communicated with the distal end of the second channel, and the proximal end of the second channel being sealed; An adjusting unit (2) connected with the distal end of the bending part (101) and used for controlling the bending direction of the bending part (101); 2. The adjustable bend thrombus aspiration catheter structure of claim 1, wherein, A suction unit (3) connected with the side of the fixing part (102) and communicated with the second channel. The bending part (101) and the fixing part (102) are integrally arranged; And / or the suction unit (3) comprises: A pipeline structure connected with the fixing part (102), the inside of the pipeline structure being provided with a third channel, one end of the third channel being communicated with the second channel; 3. The adjustable bend thrombus aspiration catheter structure of claim 2, wherein, And / or a driving structure communicated with the other end of the third channel and used for providing driving force to the first channel. The pipeline structure is detachably connected with the fixing part (102); 4. The adjustable bend thrombus aspiration catheter structure of claim 3, wherein, And / or the diameter of the third channel is not less than the diameter of the second channel. The bendable thrombus suction catheter structure comprises:

5. The adjustable bend thrombus aspiration catheter structure of claim 4, wherein, A connecting unit (5) comprising a main pipeline (501) and branch pipelines, the main pipeline (501) being connected with the pipeline structure at one end, the main pipeline (501) being communicated with each branch pipeline at the other end, and one branch pipeline being communicated with the driving structure so as to communicate the driving structure with the second channel. The connecting unit (5) comprises:

6. The adjustable bend thrombectomy catheter structure of any of claims 1-5, wherein, A valve (504) arranged on the branch pipeline, the valve (504) being used for controlling the communication between the main pipeline (501) and at least one of the branch pipelines. The inside of the side wall of the catheter body (1) is provided with a mounting channel (10131), the adjusting unit (2) comprises: An adjusting structure (201) arranged in the mounting channel (10131), the distal end of the adjusting structure (201) being connected with the distal end of the bending part (101); 7. The adjustable bend thrombus aspiration catheter structure of claim 6, wherein, A control structure (202) arranged outside the mounting channel (10131), the control structure (202) being connected with the proximal end of the adjusting structure (201) and used for driving the control structure (202) to adjust the length of the adjusting structure (201) under external force. The adjusting structure (201) is arranged along the circumferential direction of the catheter body (1) at least in two positions; And / or the adjusting structure (201) is fixedly connected with the control structure (202); And / or the bendable thrombus suction catheter structure comprises: The shell (6) is internally provided with a containing cavity, the proximal end of the fixing part (102) is arranged in the containing cavity, the shell (6) is further provided with a mounting groove (601), the mounting groove (601) is communicated with the containing cavity, and the control structure (202) is arranged in the mounting groove (601).

8. The adjustable bend thrombus aspiration catheter structure of claim 7, wherein, The angle formed by the center point of the section and the control structure (202) is 90°. The control structure (202) is rotatably connected in the shell (6).

9. The adjustable bend thrombus aspiration catheter structure of claim 8, wherein, The number of the control structure (202) corresponds to the number of the adjusting structure (201), or two adjusting structures (201) with an angle of 180° share one control structure (202). The control structure (202) comprises a driving part (2021), a connecting part (2022) and a limiting part (2023), one end of the connecting part (2022) is connected with the driving part (2021), the other end of the connecting part (2022) is connected with the limiting part (2023), the driving part (2021) and the connecting part (2022) are rotatably connected with the shell (6), the adjusting structure (201) is wound on the connecting part (2022), the size of the connecting part (2022) is smaller than the size of the driving part (2021) and the limiting part (2023).

10. The adjustable bend thrombus aspiration catheter structure of claim 9, wherein, The driving part (2021) and / or the limiting part (2023) and / or the connecting part (2022) are provided with a positioning part (2025), the positioning part (2025) is provided with a through hole (20251), and the adjusting structure (201) is fixedly connected with the positioning part (2025) after passing through the through hole (20251).

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