Blood vessel negative pressure thrombectomy device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a blood vessel negative pressure thrombectomy device. The blood vessel negative pressure thrombectomy device comprises a negative pressure connecting pipe, a negative pressure suction device and a collecting pipeline, one end of the negative pressure connecting pipe is provided with a pipeline rotating connector, the other end of the negative pressure connecting pipe is connected with an inlet of the negative pressure suction device, one end of the collecting pipeline is connected with an outlet of the negative pressure suction device, and the other end of the collecting pipeline is connected with a pipeline rotating connector. And the negative pressure suction device is used for extracting the medium through the negative pressure connecting pipe and sending out the medium through the collecting pipeline. The thrombus aspirator has the advantages that the thrombus aspirator is simple and reasonable in structural design, thrombus can be effectively and rapidly extracted, operation is flexible, the negative pressure aspirator can freely rotate relative to a catheter entering a blood vessel for thrombus extraction due to the arrangement of the pipeline rotating connector, and a doctor can conveniently adjust the optimal operation direction in vitro.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a vascular negative pressure thrombectomy device. Background Technology

[0002] Clinically, the main treatment for thrombosis is thrombolytic therapy. The patient first undergoes local anesthesia, followed by vascular puncture and insertion of a catheter and guidewire to the lesion site. After intravascular angiography, the blocked segment is identified, and thrombolytic drugs are then injected for superselective thrombolysis. This method of thrombolysis requires blocking distal small blood vessels, necessitating the use of various types of equipment, making the procedure quite complex. Furthermore, the surgeon's optimal operating position must be considered during the procedure.

[0003] Therefore, there is a need to develop a device that can assist in the rapid removal of thrombi and is easy for doctors to operate flexibly. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a vascular negative pressure thrombectomy device, which effectively overcomes the defects of the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A vascular negative pressure thrombectomy device includes a negative pressure connecting tube, a negative pressure suction device, and a collection line. One end of the negative pressure connecting tube is provided with a pipeline rotary joint, and the other end is connected to the inlet of the negative pressure suction device. One end of the collection line is connected to the outlet of the negative pressure suction device. The negative pressure suction device is used to extract the medium through the negative pressure connecting tube and send the medium out through the collection line.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, a first check valve is provided on the aforementioned negative pressure connecting pipe.

[0009] Furthermore, the aforementioned negative pressure suction device includes a negative pressure gun and a negative pressure cylinder. The negative pressure gun includes a gun body, a fixed handle connected to the lower end of the gun body, and a movable handle. The negative pressure cylinder is horizontally arranged, with one end fixedly connected to the gun body. The other end of the negative pressure cylinder is provided with a connecting nozzle, which is connected and communicates with the other end of the negative pressure connecting pipe. The fixed handle is vertically connected to the lower end of the gun body. The upper end of the movable handle is hinged to the upper end of the fixed handle. The upper end of the movable handle is provided with a connecting part. A piston is sealed inside the negative pressure cylinder. A flow channel is provided horizontally through the middle of the piston. A second one-way valve is provided in the flow channel. The piston is connected to a connecting rod that extends out of one end of the negative pressure cylinder. The connecting part is hinged to the end of the connecting rod away from the piston. The end of the flow channel away from the connecting nozzle is provided with an interface, which is connected to one end of the collection pipeline.

[0010] Furthermore, a negative pressure holding component is connected between the fixed handle and the movable handle to keep them in a close-to-each position.

[0011] Furthermore, the aforementioned negative pressure maintaining assembly includes a limiting rod. One end of the limiting rod is movably connected to the side of the movable handle near the fixed handle. The fixed handle has a through hole for the other end of the limiting rod to pass through. The limiting rod has symmetrically arranged helical toothed racks on opposite sides along its length. The fixed handle has elastic clips on both sides of the hole opposite to the movable handle, which match the helical toothed racks. The teeth of the helical toothed rack are inclined towards the movable handle and engage with the elastic clips in one direction. The limiting rod can move towards the fixed handle away from the movable handle, allowing the teeth of the helical toothed rack to slide along the elastic clips. After stopping the movement, the end of the elastic clip is embedded in the corresponding tooth groove of the helical toothed rack. The elastic clip can deform and disengage from the tooth groove under external force, or return to its original position after the external force is removed.

[0012] Furthermore, the upper end of the aforementioned movable handle is provided with a plate-shaped hinge portion, and the aforementioned fixed handle is provided with a cavity. The aforementioned hinge portion extends into the aforementioned cavity from a first opening adapted to one side of the aforementioned fixed handle, and is hinged to the aforementioned fixed handle through a pivot penetrating its middle. One side of the aforementioned hinge portion is provided with a plurality of continuously distributed arc-shaped engagement tooth grooves. A ratchet tooth is coaxially hinged in the cavity of the aforementioned fixed handle, and one of the ratchet teeth engages unidirectionally with the aforementioned engagement tooth groove. The end of the ratchet tooth away from the engagement tooth groove protrudes from a second opening adapted to the other side of the aforementioned fixed handle. A torsion spring connected to the aforementioned fixed handle is mounted on the aforementioned pivot. The ratchet tooth and the engagement tooth groove together constitute the aforementioned negative pressure holding assembly.

[0013] Furthermore, the gun body is provided with a cavity that extends horizontally through both ends, and one end of the negative pressure cylinder is fitted into the cavity and connected and fixed to it.

[0014] Furthermore, one end of the aforementioned negative pressure cylinder is open.

[0015] Furthermore, the upper end of the aforementioned movable handle overlaps with the upper end of the aforementioned fixed handle, and is hinged together by a pin passing through both.

[0016] Furthermore, the negative pressure cylinder is equipped with a negative pressure monitor connected to its inner cavity.

[0017] The advantages of this utility model are: reasonable structural design, effectively solving the problem of high fuel consumption in high-horsepower tractors, and easier disassembly, assembly and maintenance compared to existing tractor structures. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one embodiment of the vascular negative pressure thrombectomy device of this utility model;

[0019] Figure 2 This is a schematic diagram of another embodiment of the vascular negative pressure thrombectomy device of this utility model;

[0020] Figure 3 This is a partial cross-sectional view of an embodiment of the vascular negative pressure thrombectomy device of this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Negative pressure connecting pipe; 2. Negative pressure suction device; 3. Collection pipeline; 4. Negative pressure holding assembly; 11. Pipeline rotary joint; 12. First one-way valve; 21. Negative pressure gun; 22. Negative pressure cylinder; 41. Limiting rod; 42. Helical rack; 43. Elastic clip; 45. Ratchet; 211. Gun body; 212. Fixed handle; 213. Movable handle; 214. Connecting part; 221. Piston; 222. Connecting rod; 225. Flow channel; 226. Second one-way valve; 2131. Engaging tooth groove. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0024] Example: Figure 1 , 2 As shown in Figure 3, the vascular negative pressure thrombectomy device of this embodiment includes a negative pressure connecting tube 1, a negative pressure suction device 2, and a collection line 3. One end of the negative pressure connecting tube 1 is provided with a pipeline rotary joint 11, and the other end is connected to the inlet of the negative pressure suction device 2. One end of the collection line 3 is connected to the outlet of the negative pressure suction device 2. The negative pressure suction device 2 is used to extract the medium through the negative pressure connecting tube 1 and send the medium out through the collection line 3.

[0025] The following is the usage process:

[0026] After vascular puncture, when thrombectomy is required, the negative pressure connecting tube 1 is connected to the thrombectomy catheter introduced into the patient's blood vessel (during the thrombectomy process, one end of the thrombectomy catheter needs to pass through the thrombus and be twisted as needed). Then, the negative pressure aspiration device 2 is activated to generate negative pressure. The thrombus is drawn into the negative pressure aspiration device 2 through the thrombectomy catheter and negative pressure connecting tube 1, and then discharged through the collection line 3 (which can be pre-connected to a container for discharge). During the operation, because the thrombectomy catheter is in the blood vessel, if the doctor needs to adjust the angle of the negative pressure aspiration device 2 or twist the angle of the thrombectomy catheter, the design of the tubing rotary joint 11 allows relative rotation between the thrombectomy catheter and the negative pressure connecting tube 1, thus fulfilling the above operational requirements. The structural design is simple and reasonable, enabling effective and rapid thrombus removal. The operation is relatively flexible, and the tubing rotary joint allows the negative pressure aspiration device to rotate freely relative to the thrombectomy catheter entering the blood vessel, facilitating external adjustment of the optimal operating position by the doctor.

[0027] In this embodiment, a first one-way valve 12 is provided on the aforementioned negative pressure connecting pipe 1. The first one-way valve 12 only allows the medium to enter the negative pressure suction device 2 through the negative pressure connecting pipe 1, and does not allow reverse flow, thus avoiding the problem of thrombus backflow during the suction process.

[0028] As a preferred implementation method, such as Figure 3 As shown, the aforementioned negative pressure suction device 2 includes a negative pressure gun 21 and a negative pressure cylinder 22. The negative pressure gun 21 includes a gun body 211, a fixed handle 212 connected to the lower end of the gun body 211, and a movable handle 213. The negative pressure cylinder 22 is horizontally arranged, with one end fixedly connected to the gun body 211. The other end of the negative pressure cylinder 22 is provided with a connecting nozzle, which is connected and communicates with the other end of the negative pressure connecting pipe 1. The fixed handle 212 is vertically connected to the lower end of the gun body 211, and the upper end of the movable handle 213 is connected to the fixed handle 212. The upper end is hinged, and the upper end of the movable handle 213 is provided with a connecting part 214. The piston 221 is sealed inside the negative pressure cylinder 22. The piston 221 is provided with a horizontal flow channel 225 in the middle. The flow channel 225 is provided with a second one-way valve 226. The piston 221 is connected to a connecting rod 222 that extends out of one end of the negative pressure cylinder 22. The connecting part 214 is hinged to the end of the connecting rod 222 away from the piston 221. The end of the flow channel 225 away from the connecting nozzle is provided with an interface, which is connected to one end of the collection pipeline 3.

[0029] In the above implementation scheme, during thrombus aspiration, pressing the movable handle 213 causes it to move closer to the fixed handle 212 around the hinge point. The movable handle 213 drives the connecting rod 222 and piston 221 to move towards one end of the negative pressure cylinder 22, generating negative pressure inside the negative pressure cylinder 22. The thrombus then enters the negative pressure cylinder 22 through the thrombectomy catheter and negative pressure connecting tube 1. Afterward, rotating the movable handle 213 away from the fixed handle 212 causes the movable handle 213 to move towards the other end of the negative pressure cylinder 22, discharging the thrombus fluid in the negative pressure cylinder 22 through the flow channel 225 in the piston 221 and the collection line 3. The entire structure is ingeniously designed; thrombus aspiration and compression can be achieved very quickly simply by operating the movable handle 213 relative to the fixed handle 212.

[0030] In this embodiment, the connecting rod 222 adopts a hollow sleeve component, and the connecting part 214 uses two plate-shaped components symmetrically distributed on both sides of the connecting rod 222, which are rotatably connected to both sides of the connecting rod 222 by short pins respectively.

[0031] In a preferred embodiment, a negative pressure holding component 4 is connected between the fixed handle 212 and the movable handle 213 to keep them in a close-to-each-other state.

[0032] In the above implementation scheme, when aspirating thrombi, after pressing the movable handle 213 to bring it close to the fixed handle 212, the negative pressure holding component 4 fixes the position of the two, so that the negative pressure in the negative pressure cylinder 22 can be maintained without continuous pressing. In this process, the doctor does not need to continuously press, which reduces the doctor's fatigue to a certain extent and frees up the hands to do other surgical-related tasks while maintaining negative pressure.

[0033] In this embodiment, the negative pressure maintaining component 4 includes at least the following two structural forms:

[0034] 1) such as Figure 1As shown, the negative pressure maintaining assembly 4 includes a limiting rod 41. One end of the limiting rod 41 is movably connected to the side of the movable handle 213 near the fixed handle 212. The fixed handle 212 has a through hole for the other end of the limiting rod 41 to pass through. The limiting rod 41 has symmetrically arranged helical toothed racks 42 on both sides along its length. The fixed handle 212 has elastic clips 43 on both sides of the through hole opposite to the movable handle 213, which respectively match the helical toothed racks 42. The teeth of the rack 42 are inclined toward the location of the movable handle 213 and engage with the elastic card 43 in one direction. The limiting rod 41 can move toward the end of the fixed handle 212 away from the movable handle 213, so that the teeth of the rack 42 slide along the elastic card 43. After stopping the movement, the end of the elastic card 43 is embedded in the tooth groove of the rack 42 at the corresponding position. The elastic card 43 can deform and disengage from the tooth groove it engages with under the action of external force, or return to its position after the external force is removed.

[0035] In the above scheme 1), the engagement of the helical rack 42 and the elastic card 43 is similar to that of a ratchet and ratchet teeth. The two engage in a one-way manner. When the movable handle 213 is pressed close to the fixed handle 212, the two will not engage. The teeth of the helical rack 42 will slide along the elastic card 43. When the movable handle 213 tends to open relative to the fixed handle 212, the helical rack 42 and the elastic card 43 will engage. This structure maintains the closed state between the movable handle 213 and the fixed handle 212, thereby maintaining the negative pressure in the negative pressure cylinder 22. The operation is relatively simple. No additional operation is required during the pressing and subsequent holding process, achieving "self-locking". When it is necessary to release the holding state, the elastic card 43 needs to be manually deformed to disengage from the tooth groove of the helical rack 42 to unlock.

[0036] 2) such as Figure 2 As shown, the upper end of the movable handle 213 is provided with a plate-shaped hinge (J in the figure). The fixed handle 212 has a cavity. The hinge extends into the cavity from a first opening adapted to one side of the fixed handle 212 and is hinged to the fixed handle 212 through a rotating shaft passing through its middle. One side of the hinge is provided with a plurality of continuously distributed arc-shaped engaging tooth grooves 2131 (distributed on the same arc line, which is coaxial with the rotating shaft). In the cavity of the fixed handle 212, a coaxial pin (e in the figure) is hinged to a ratchet 45 that engages unidirectionally with the engaging tooth groove 2131. The end of the ratchet 45 away from the engaging tooth groove 2131 protrudes from a second opening adapted to the other side of the fixed handle 212. A torsion spring connected to the fixed handle 212 is mounted on the pin. The ratchet 45 and the engaging tooth groove 2131 together constitute the negative pressure holding assembly 4.

[0037] In the above scheme 2), when the movable handle 213 closes close to the fixed handle 212, the ratchet 45 will elastically slide along the engagement groove 2131 (the engagement groove 2131 is an oblique groove). When it stops closing, the tip of the ratchet 45 (that is, one end) engages in the corresponding engagement groove 2131 at the current position and engages with each other, suppressing the rotation of the hinge. When the hinge needs to rotate, that is, when the movable handle 213 needs to move away from the fixed handle 212, the other end of the ratchet 45 is pressed from the other side of the fixed handle 212, causing one end (the tip of the tooth) to lift up and disengage from the engagement groove 2131, so that the movable handle 213 can open and close freely. This design can achieve automatic locking during the process of pressing the movable handle 213 close to the fixed handle 212, which is very ingenious.

[0038] In this embodiment, the gun body 211 is provided with a cavity that extends horizontally through both ends, and one end of the negative pressure cylinder 22 is fitted into the cavity and connected and fixed to each other.

[0039] In this embodiment, one end of the negative pressure cylinder 22 is open. During maintenance or replacement, the piston 221 can be easily removed from one end of the negative pressure cylinder 22 after the connecting part 214 is separated from the connecting rod 222.

[0040] In this embodiment, the upper end of the movable handle 213 overlaps with the upper end of the fixed handle 212 and is hinged by a pin that passes through both.

[0041] In a preferred embodiment, the negative pressure cylinder 22 is provided with a negative pressure monitor connected to its inner cavity.

[0042] In the above implementation scheme, the negative pressure monitor can monitor the negative pressure value in the negative pressure cylinder 22 in real time, so as to provide medical staff with a negative pressure value prompt, making the aspiration operation more accurate. Generally, a conventional negative pressure gauge can be used as the negative pressure monitor.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vascular negative pressure thrombectomy device, characterized in that: It includes a negative pressure connecting pipe (1), a negative pressure suction device (2), and a collection line (3). One end of the negative pressure connecting pipe (1) is provided with a pipe rotary joint (11), and the other end is connected to the inlet of the negative pressure suction device (2). One end of the collection line (3) is connected to the outlet of the negative pressure suction device (2). The negative pressure suction device (2) is used to extract the medium through the negative pressure connecting pipe (1) and send the medium out through the collection line (3).

2. The vascular negative pressure thrombectomy device according to claim 1, characterized in that: The negative pressure connecting pipe (1) is equipped with a first one-way valve (12).

3. A vascular negative pressure thrombectomy device according to claim 1 or 2, characterized in that: The negative pressure suction device (2) includes a negative pressure gun (21) and a negative pressure cylinder (22). The negative pressure gun (21) includes a gun body (211), a fixed handle (212) connected to the lower end of the gun body (211), and a movable handle (213). The negative pressure cylinder (22) is horizontally arranged, with one end connected and fixed to the gun body (211). The other end of the negative pressure cylinder (22) is provided with a connecting nozzle, which is connected and communicates with the other end of the negative pressure connecting pipe (1). The fixed handle (212) is vertically connected to the lower end of the gun body (211), and the upper end of the movable handle (213) is connected to the upper end of the fixed handle (212). The upper end of the movable handle (213) is provided with a connecting part (214). A piston (221) is sealed inside the negative pressure cylinder (22). A horizontal flow channel (225) is provided in the middle of the piston (221). A second one-way valve (226) is provided in the flow channel (225). A connecting rod (222) is connected to the piston (221) and extends out of one end of the negative pressure cylinder (22). The connecting part (214) is hinged to the end of the connecting rod (222) away from the piston (221). An interface is provided at the end of the flow channel (225) away from the connecting nozzle. This interface is connected to one end of the collection pipeline (3).

4. The vascular negative pressure thrombectomy device according to claim 3, characterized in that: A negative pressure holding assembly (4) is connected between the fixed handle (212) and the movable handle (213) to keep them in a close-to-each-other state.

5. The vascular negative pressure thrombectomy device according to claim 4, characterized in that: The negative pressure maintaining assembly (4) includes a limiting rod (41). One end of the limiting rod (41) is movably connected to the side of the movable handle (213) near the fixed handle (212). The fixed handle (212) has a through hole for the other end of the limiting rod (41) to pass through. The limiting rod (41) has symmetrical helical toothed racks (42) on both sides along its length. The fixed handle (212) has elastic clips (43) that match the helical toothed racks (42) on both sides of the hole at the end opposite to the movable handle (213). The teeth of the rack (42) are inclined toward the location of the movable handle (213) and engage with the elastic card (43) in one direction. The limiting rod (41) can move toward the end of the fixed handle (212) away from the movable handle (213) and make the teeth of the helical rack (42) slide along the elastic card (43). After stopping the movement, the end of the elastic card (43) is embedded in the tooth groove of the helical rack (42) at the corresponding position. The elastic card (43) can deform and disengage from the tooth groove it engages with under the action of external force, or return to its position after the external force is removed.

6. The vascular negative pressure thrombectomy device according to claim 4, characterized in that: The upper end of the movable handle (213) is provided with a plate-shaped hinge part. The fixed handle (212) is provided with a cavity. The hinge part extends into the cavity from a first opening adapted to one side of the fixed handle (212) and is hinged to the fixed handle (212) through a pivot penetrating its middle. One side of the hinge part is provided with a plurality of continuously distributed arc-shaped engagement grooves (2131). The cavity of the fixed handle (212) is coaxially pivoted with a ratchet (45) that engages unidirectionally with one of the engagement grooves (2131). The end of the ratchet (45) away from the engagement groove (2131) protrudes from a second opening adapted to the other side of the fixed handle (212). A torsion spring connected to the fixed handle (212) is mounted on the pivot. The ratchet (45) and the engagement groove (2131) together constitute the negative pressure holding assembly (4).

7. The vascular negative pressure thrombectomy device according to claim 3, characterized in that: The gun body (211) has a cavity that runs horizontally through both ends of it, and one end of the negative pressure cylinder (22) is fitted into the cavity and connected and fixed to each other.

8. The vascular negative pressure thrombectomy device according to claim 3, characterized in that: One end of the negative pressure cylinder (22) is open.

9. A vascular negative pressure thrombectomy device according to claim 3, characterized in that: The upper end of the movable handle (213) overlaps with the upper end of the fixed handle (212) and is hinged by a pin that passes through them.

10. A vascular negative pressure thrombectomy device according to claim 3, characterized in that: The negative pressure cylinder (22) is equipped with a negative pressure monitor connected to its inner cavity.

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