CN215018481U - Thrombolysis system - Google Patents

Abstract

The utility model relates to a dissolve bolt system. The injection mechanism comprises an injection tube with a liquid outlet end connected with the thrombolytic catheter and a push rod which is connected with the interior of the injection tube in a sliding way and is internally provided with a liquid medicine channel; a liquid storage device communicated with the liquid medicine channel through a pipeline; a valve assembly including a first check valve disposed in the syringe, a second check valve disposed on the pushrod; the driving mechanism is used for driving the push rod to slide in the injection tube; and an adjustment mechanism capable of controlling the maximum distance that the push rod slides relative to the syringe. When the push rod slides towards the direction close to the liquid outlet end, the injection tube is communicated with the thrombolytic catheter; when the driving mechanism drives the push rod to slide towards the direction far away from the liquid outlet end, the injection tube, the liquid medicine channel and the liquid storage device are communicated, so that the connection operation of the thrombolysis catheter and the medicine injection device can be simplified, the single-hand injection can be realized, and the continuous injection can be realized.

Description

Thrombolysis system

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a thrombolysis system.

Background

A Catheter-Directed Thrombolysis (CDT) is a conventional method for treating thrombus and embolism in blood vessels, and is characterized in that a Thrombolysis Catheter is percutaneously punctured to a thrombus part under the guidance of Doppler ultrasound and X-ray fluoroscopy, and thrombolytic drugs (rtPA, urokinase and the like) are quantitatively injected to directly act on the thrombus to realize accurate Thrombolysis. Compared with the traditional systemic thrombolysis, the direct catheter thrombolysis has the following advantages: (1) high-concentration medicine distribution of the diseased blood vessels improves thrombolysis efficiency; (2) the medicine is prevented from circulating the whole body to cause bleeding, and bleeding complications are reduced; (3) reducing the dosage of the thrombolytic agent, the treatment time, the intensive care utilization rate and the hospitalization time.

Currently marketed assemblies for catheter-directed thrombolysis include thrombolysis catheters and drug injectors. The extracorporeal drug injector connected with the thrombolytic catheter is generally of a right-angled double-injector structure, and a Y valve is required to be connected when the extracorporeal drug injector is connected with the thrombolytic catheter, so that the connection among a plurality of components is involved, the operation is complicated, and the waste of consumables is also caused; when injecting the medicine, the doctor needs to operate with both hands, which is extremely inconvenient; and the injector needs to be replaced for a plurality of times according to the amount of the injected medicine to add the thrombolytic medicine, so the operation process is complicated.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art not enough, provide one kind and can simplify the thrombolytic catheter and the drug injection device be connected the operation, realize the one-hand injection and can inject thrombolytic system in succession.

For solving the technical problem, the utility model discloses take following technical scheme:

the utility model provides a thrombolysis system, including thrombolysis pipe and medicine injection device, medicine injection device is including injecting the mechanism, injection mechanism includes:

an injection tube, the liquid outlet end of the injection tube is detachably connected with the near end of the thrombolytic catheter,

a push rod which is connected with the inside of the injection tube in a sliding way, a liquid medicine channel is arranged inside the push rod,

a check valve assembly including a first check valve disposed in the syringe, a second check valve disposed on the pushrod;

the drug injection device further comprises:

the liquid storage device is communicated with the liquid medicine channel through a pipeline;

the driving mechanism is used for driving the push rod to slide in the injection tube, if the driving mechanism drives the push rod to slide towards the direction close to the liquid outlet end, the first check valve is opened, the second check valve is closed, and the injection tube is communicated with the thrombolytic catheter; if the driving mechanism drives the push rod to slide towards the direction far away from the liquid outlet end, the first check valve is closed, the second check valve is opened, and the injection tube, the liquid medicine channel and the liquid storage device are communicated;

and the adjusting mechanism can control the maximum sliding distance of the push rod relative to the injection tube.

Preferably, the thrombolytic system further comprises a blocking guide wire which is arranged in the thrombolytic catheter in a penetrating manner and used for closing the distal end of the thrombolytic catheter, the drug injection device further comprises a tee pipe fitting used for connecting the thrombolytic catheter and the liquid outlet end, a first port of the tee pipe fitting is fixedly communicated with the liquid outlet end, a second port of the tee pipe fitting is detachably communicated with the thrombolytic catheter, and the proximal end of the blocking guide wire enters from the second port of the tee pipe fitting, passes through the tee pipe fitting and is detachably and hermetically connected with a third port of the tee pipe fitting.

When the thrombolytic catheter is used, a guide wire is firstly inserted into a diseased blood vessel part, then the thrombolytic catheter is conveyed to the diseased part along the guide wire, then the guide wire is withdrawn, the plugging guide wire is replaced, the distal end of the sealing guide wire reaches the diseased part and then is plugged, and finally the proximal ends of the plugging guide wire and the thrombolytic catheter are connected with a drug injection device. When the proximal end of the thrombolytic catheter is connected with the second port and the proximal end of the plugging guide wire is connected with the third port, the distal end of the thrombolytic catheter keeps a sealed state, thrombolytic drugs are injected at high pressure through the side hole of the catheter body, the connection mode is simple and convenient, and the operation is easy, so that the workload of doctors is greatly reduced.

The utility model discloses in, the distal end with the near-end with operating personnel's angle definition, the distal end is the one end of keeping away from operating personnel, the near-end is the one end of being close to operating personnel.

Further preferably, the three-way pipe fitting comprises a main pipe and a branch pipe, one end of the main pipe is communicated with the side wall of the branch pipe, the other end of the main pipe is the first port, one end of the branch pipe is the second port, the second port is communicated with the thrombolytic catheter through a luer head, the other end of the branch pipe is the third port, a sealing device is arranged at the third port, and the plugging guide wire penetrates through the sealing device and is fixedly connected with the sealing device.

Preferably, the sealing device is a hemostatic valve, and the proximal end of the occlusion guide wire can penetrate out of the hemostatic valve and be locked.

Preferably, a partition board fixedly connected with the injection tube is arranged in the injection tube, the partition board divides the injection tube into a first chamber and a second chamber, the middle part of the partition board extends into the first chamber to form a channel capable of communicating the first chamber and the second chamber,

the first check valve comprises a first elastic part sleeved on the channel and a first baffle fixedly connected with the first elastic part, and the first baffle is connected with the outlet of the channel through the first elastic part and closes the outlet of the channel in an initial no-load state;

if the driving mechanism drives the push rod to slide towards the direction close to the liquid outlet end, the first baffle leaves the outlet of the channel, and the thrombolytic catheter, the first chamber and the second chamber are communicated;

if the driving mechanism drives the push rod to slide towards the direction far away from the liquid outlet end, the first baffle plate approaches to the outlet of the channel and closes the outlet of the channel.

According to some specific and preferred embodiments, the first elastic member is a first spring, one end of the first spring is fixedly connected to the first baffle, and the other end of the first spring is fixedly connected to the partition and/or the inner wall of the first chamber.

Preferably, the second check valve comprises a second baffle plate and a second elastic element fixedly connected with the second baffle plate and the push rod, and in an initial idle state, the second baffle plate is connected with the push rod through the second elastic element and closes the outlet of the liquid medicine channel;

if the driving mechanism drives the push rod to slide towards the direction close to the liquid outlet end, the second baffle is connected with the push rod, and the outlet of the liquid medicine channel is closed;

if the driving mechanism drives the push rod to slide towards the direction far away from the liquid outlet end, the second baffle leaves the push rod, and the injection tube, the liquid medicine channel and the liquid storage device are communicated.

According to some specific and preferred embodiments,

the second elastic piece is a second spring;

an installation pipeline used for installing the second spring is arranged in the push rod, one end of the installation pipeline is communicated with the injection tube, the other end of the installation pipeline is communicated with the liquid medicine channel, one end of the second spring is fixedly connected with the second baffle, and the other end of the second spring is fixedly connected with the inner wall of the installation pipeline.

Preferably, the adjustment mechanism comprises an adjustment assembly provided on the drive mechanism.

According to some embodiments, the drive mechanism comprises:

the sliding block is arranged on the push rod;

the trigger handle is provided with a sliding chute which can be matched with the sliding block, and the trigger handle and the push rod are rotated and connected in a sliding manner through the matching of the sliding block and the sliding chute;

a fixed handle, the fixed handle is fixedly connected with the injection tube, the firing handle is rotationally connected with the fixed handle,

the adjusting assembly comprises a blocking piece movably arranged on the sliding groove and a fixing piece capable of being matched with the blocking piece, and the sliding distance of the sliding block is controlled through the matching of the blocking piece and the fixing piece.

According to another particular and preferred embodiment,

the adjusting component comprises a cam component which is arranged between the firing handle and the fixed handle and can drive the firing handle to rotate,

the cam assembly includes:

one end of the cam is rotationally connected with the fixed handle through a pin shaft, the other end of the cam is abutted against the firing handle,

a rotary knob which is fixedly connected with the pin shaft,

the distance for the firing handle to push the push rod to slide is controlled by the rotating knob and the cam.

When manual extrusion percussion handle and fixed handle, the push rod that the percussion handle is connected injects into the thrombolysis pipe with the medicine ration in the injection syringe, and during the handle return, the medicine among the stock solution device enters into the injection syringe, so repeatedly press and hold the handle and carry out medicine continuous injection, but and one-hand operation, the degree of convenience is higher.

The distance of the firing handle for pushing the push rod to slide in the injection tube is controlled by adjusting the pressing and holding angle stroke of the control handle of the component, so that the aim of controlling the volume of the medicine injected at a time is fulfilled.

Particularly, the hand operation is more in line with the human engineering through the design of the firing handle, the fixing handle and the whole structure.

Preferably, the reservoir is a syringe or a solution bag.

More preferably a syringe, which allows for better control of the total volume of the liquid drug to be injected.

Preferably, the liquid storage device is detachably connected with the push rod through a pipeline.

More preferably, the liquid storage device is communicated with the liquid medicine channel of the push rod through an extension pipe matched with a standard luer head.

The rear end has an extension tube with a standard luer tip for connection to a syringe or solution bag. Two check valves are arranged in the injector to realize unidirectional input of the medicine.

Due to the implementation of the above technical scheme, compared with the prior art, the utility model have the following advantage:

the utility model discloses a thrombolysis system, through the overall structure's of medicine injection device design, can simplify the connection operation of thrombolysis pipe and medicine injection device, can realize the one-hand injection and realize continuous injection, guarantees the one-way input of medicine through check valve assembly, through the volume of adjustment mechanism control single injection medicine, realizes accurate ration injection, reaches the purpose of simplifying doctor's operation, improving injection efficiency, increase the degree of convenience.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic perspective view of the thrombolytic system of example 1;

FIG. 2 is a front sectional view of FIG. 1;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a rear sectional view of FIG. 1;

FIG. 5 is an enlarged view of FIG. 4 at B;

FIG. 6 is a schematic view showing the construction of a fixed handle of a drug injection device of the thrombolytic system of the embodiment 1;

fig. 7 is a schematic structural view of a cam of the drug injection device of the thrombolytic system of the embodiment 1;

FIG. 8 is a schematic structural view of a drug injection device of the thrombolytic system of the embodiment 1 in a cocked state;

fig. 9 is a schematic structural view of the drug injection device of the thrombolytic system of the embodiment 1 in a reset state;

FIG. 10 is a schematic view showing the construction of a drug injection device of the thrombolytic system of the embodiment 2;

FIG. 11 is an enlarged view at C of FIG. 10;

wherein: 1. an injection mechanism; 11. an injection tube; 111. a first chamber; 112. a second chamber; 113. a channel; 12. a push rod; 121. a liquid medicine passage; 31. a first baffle plate; 32. a first spring; 33. a second baffle; 34. a second spring; 4. A drive mechanism; 41. fixing a handle; 411. a first portion to which the handle is fixed; 4111. a pawl structure; 412. a second portion to which the handle is fixed; 42. a firing handle; 421. a chute; 422. a slider; 4221. a protrusion; 5. an adjustment mechanism 51, a cam; 52. a pin shaft; 53. rotating the knob; 54. a third spring; 55. a dam; 56. a fixing member; 6. A liquid storage device; 7. a tee pipe fitting; 8. a luer fitting; 9. an occlusion device.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the present description, it is to be understood that the distal end and the proximal end are defined at the angle of the operator, the distal end being the end away from the operator and the proximal end being the end closer to the operator.

The terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Example 1

As shown in fig. 1 to 9, this embodiment is a preferred embodiment of the thrombolysis system provided by the present invention, which includes a thrombolysis catheter and a drug injection device. The medicine injection device comprises an injection mechanism 1, a liquid storage device 6 communicated with the injection mechanism 1, a check valve assembly arranged on the injection mechanism 1, a driving mechanism 4 used for driving the injection mechanism 1 to work, and an adjusting mechanism 5 used for controlling the injection amount of single medicine liquid.

Specifically, the thrombolytic catheter of the present embodiment is a conventional thrombolytic catheter with an open distal end, and when in use, the guiding wire is first introduced into a diseased vascular site, then the thrombolytic catheter is delivered to the diseased vascular site along the guiding wire, then the guiding wire is withdrawn, the blocking wire is replaced, the distal end of the blocking wire is blocked after reaching the diseased vascular site, and finally the proximal ends of the blocking wire and the thrombolytic catheter are connected to the drug injection device. When the proximal end of the thrombolytic catheter is connected with the second port and the proximal end of the plugging guide wire is connected with the third port, the distal end of the thrombolytic catheter keeps a sealed state, and thrombolytic drugs are injected at high pressure through the side hole of the catheter body.

Specifically, the injection mechanism 1 includes a syringe 11 and a push rod 12 slidably connected to the inside of the syringe 11. The far end of the injection tube 11 is a liquid outlet end which is detachably connected with the near end of the thrombolytic catheter. The far end of the push rod 12 is always positioned in the injection tube 11, the near end of the push rod 12 is provided with a sealing plug which can be matched with the inner wall of the injection tube 11, a liquid medicine channel 121 which extends from the far end to the near end is arranged inside the push rod 12, and the liquid medicine channel 121 is detachably communicated with the liquid storage device 6 through a pipeline.

In this embodiment, the liquid storage device 6 is a syringe, and a liquid outlet of the syringe is communicated with the liquid medicine channel of the push rod 12 through a pipeline equipped with a standard luer connector, so that the connection operation is very convenient. Of course, in other embodiments, other types of reservoirs 6 may be used, including fluid bags, which do not contain gas inside and do not allow gas to enter.

Specifically, the medicine injection device further comprises a three-way pipe fitting 7 used for connecting the thrombolysis catheter and the liquid outlet end, a first port of the three-way pipe fitting 7 is fixedly communicated with the liquid outlet end, a second port of the three-way pipe fitting 7 is detachably communicated with the thrombolysis catheter, and the near end of the plugging guide wire enters from the second port of the three-way pipe fitting 7, penetrates through the three-way pipe fitting 7 and is detachably and hermetically connected with a third port of the three-way pipe fitting 7.

In this embodiment, the three-way pipe fitting 7 includes a main pipe and a branch pipe, one end of the main pipe is communicated with a side wall of the branch pipe, the other end of the main pipe is a first port, one end of the branch pipe is a second port, the second port is detachably communicated with the thrombolysis catheter through a luer 8, the other end of the branch pipe is a third port, the third port is provided with a sealing device 9, and a plugging guide wire in the thrombolysis catheter passes through the branch pipe and is detachably and fixedly connected with the sealing device 9. In this embodiment, the sealing means 9 is a haemostatic valve.

Specifically, a partition plate fixedly connected with the injection tube 11 is arranged in the injection tube 11, the partition plate divides the interior of the injection tube 11 into a first chamber 111 and a second chamber 112, and the middle part of the partition plate extends into the first chamber 111 to form a channel 113 capable of communicating the first chamber 111 with the second chamber 112. In this embodiment, the partition, the passage 113, and the injection tube 11 are integrally formed. In this embodiment, the central axes of the first chamber 111, the second chamber 112 and the channel 113 are coincident. In this embodiment, the second chamber 112 is larger in diameter and length than the first chamber 111.

In the utility model, the injection tube 11 is preferably made of transparent material and has scales thereon.

Specifically, the check valve assembly includes a first check valve disposed in the first chamber 111 and a second check valve disposed at a distal end of the pushrod 12. The first check valve comprises a first elastic member sleeved on the channel 113 and a first baffle 31 fixedly connected with the first elastic member, the first baffle 31 is connected with the outlet of the channel 113 through the first elastic member and closes the outlet of the channel 113 in an initial no-load state, and when the outlet of the channel 113 is closed, the second chamber 112 is not communicated with the thrombolytic catheter. When the driving mechanism 4 drives the push rod 12 to slide towards the direction close to the liquid outlet end, air or liquid in the second chamber 112 is compressed to generate pressure on the rear surface of the first baffle 31, the first baffle 31 is pushed forwards, the first elastic piece extends, the first baffle 31 leaves the outlet of the channel 113, and the thrombolytic catheter, the first chamber 111 and the second chamber 112 are communicated; when the driving mechanism 4 drives the push rod 12 to slide towards the direction far away from the liquid outlet end, the force applied to the rear surface of the first baffle 31 is reduced, the first elastic element resets to drive the first baffle 31 to approach the outlet of the channel 113 and close the channel, and the second chamber 112 is not communicated with the thrombolytic catheter.

In this embodiment, the first elastic member is a first spring 32 sleeved on the channel 113, a front end of the first spring 32 is fixedly connected with the first baffle 31, and a rear end of the first spring 32 is fixedly connected with the partition plate.

Specifically, the second check valve includes a second blocking plate 33 and a second elastic member fixedly connected to the second blocking plate 33 and the push rod 12, the second blocking plate 33 is connected to the push rod 12 through the second elastic member and closes the outlet of the medical fluid passage 121 in an initial no-load state, and the second chamber 112 is not communicated with the medical fluid passage 121 when the outlet of the medical fluid passage 121 is closed. When the driving mechanism 4 drives the push rod 12 to slide towards the direction close to the liquid outlet end, air or liquid in the second chamber 112 is compressed to generate pressure on the front surface of the second baffle 33, the second baffle 33 is kept connected with the push rod 12, and the outlet of the liquid medicine channel 121 is kept closed; when the driving mechanism 4 drives the push rod 12 to slide towards the direction far away from the liquid outlet end, the pressure on the front surface of the second baffle 33 is reduced, the stress on the rear surface of the second baffle 33 is increased, the second elastic piece extends, the second baffle 33 leaves the push rod 12, the injection tube 11, the liquid medicine channel 121 and the liquid storage device 6 are communicated, when the driving mechanism 4 drives the push rod 12 to slide towards the direction near the liquid outlet end again, the pressure on the front surface of the second baffle 33 is increased, the elastic force of the second elastic piece enables the second elastic piece to reset, the second baffle 33 resets and is connected with the push rod 12, and the outlet of the liquid medicine channel 121 is closed.

In this embodiment, the second elastic member is a second spring 34; an installation pipeline for installing the second spring 34 is arranged in the push rod 12, the front end of the installation pipeline is communicated with the injection tube 11, the rear end of the installation pipeline is communicated with the liquid medicine channel, the front end of the second spring 34 is fixedly connected with the second baffle 33, and the rear end of the second spring 34 is fixedly connected with the inner wall of the installation pipeline. In this embodiment, the mounting tube is disposed in the piston.

Specifically, the driving mechanism 4 is used for driving the push rod 12 to slide in the injection tube 11, when the driving mechanism 4 drives the push rod 12 to slide towards the direction close to the liquid outlet end, the first check valve is opened, the second check valve is closed, and the injection tube 11 is communicated with the thrombolytic catheter; when the driving mechanism 4 drives the push rod 12 to slide towards the direction far away from the liquid outlet end, the first check valve is closed, the second check valve is opened, and the injection tube 11, the liquid medicine channel 121 and the liquid storage device 6 are communicated.

More specifically, the driving mechanism 4 comprises a fixed handle 41 fixedly connected with the syringe 11, and a firing handle 42 crosswise and rotatably connected with the fixed handle 41, wherein the firing handle 42 is rotatably and slidably connected with the push rod 12.

In this embodiment, the fixed handle 41 comprises a first portion 411 of the fixed handle and a second portion 412 of the fixed handle fixedly connected with the first portion 411 of the fixed handle, the firing handle 42 is rotatably connected with the first portion 411 of the fixed handle and the second portion 412 of the fixed handle through a rotating pivot, the firing handle 42 is located between the first portion 411 of the fixed handle and the second portion 412 of the fixed handle, and the upper end portions of the first portion 411 of the fixed handle and the second portion 412 of the fixed handle are fixedly connected with the two sides of the injection tube 11 respectively, so as to ensure stability. The lower ends of the first portion 411 of the stationary handle and the second portion 412 of the stationary handle cooperate to form a gripping portion. The upper end of the firing handle 42 forms a symmetrical sliding chute 421, the proximal end of the push rod 12 is provided with a slide block 422, the middle of the slide block 422 is provided with a through hole, the push rod 12 is positioned in the through hole and fixedly connected with the through hole, two ends of the slide block 422 are respectively provided with a protruding boss 4221, the protruding boss 4221 is slidably connected with the sliding chute 421, and the lower end of the firing handle 42 forms an annular holding part. The handle setting of this embodiment can guarantee the handle and the stable connection of push rod 12, and the structural design who holds the portion accords with ergonomic, and the material is comfortable, reinforcing operating personnel's use comfort and convenience.

In particular, the adjustment mechanism 5 is able to control the angular travel of the grip to control the maximum distance that the pusher 12 slides relative to said syringe 11.

In this embodiment, the adjusting assembly includes a cam assembly disposed between the firing handle 42 and the fixed handle 41 and capable of driving the firing handle 42 to rotate, the cam assembly includes a cam 51 rotatably connected to the fixed handle 41 via a pin 52 at an upper end thereof, and a cam 51 abutted to the firing handle 42 at a lower end thereof.

Specifically, the pin 52 penetrates through the first portion 411 of the fixed handle and the second portion 412 of the fixed handle, two ends of the pin 52 are respectively located at the outer side of the first portion 411 of the fixed handle and the outer side of the second portion 412 of the fixed handle, two ends of the pin 52 are respectively provided with the rotating knobs 53, and the pin 52 is further provided with a limiting component, so that the cam 51 is kept fixed in the longitudinal direction of the pin 52, and the lower end of the cam 51 is always tangent to the firing handle 42. In this embodiment, the detent structure 4111 is disposed on the first portion 411 of the fixed handle, so that the rotating knob 53 can only control the cam 51 to rotate counterclockwise, the pressing angle stroke of the handle can be adjusted from maximum to minimum, and when the injection amount needs to be adjusted, the rotating knob 53 is pressed to reset the firing handle 42.

Before the medicine injection device is connected with the thrombolytic catheter, the interior of the medicine injection device is filled with liquid medicine, as shown in fig. 8, when the medicine injection device is fired, the firing handle 42 pushes the push rod 12 to slide forwards, the first check valve is opened, the second check valve is closed, the first chamber 111 and the second chamber 112 are communicated with the thrombolytic catheter, the liquid medicine in the injection tube 11 enters the thrombolytic catheter, as shown in fig. 9, when the medicine injection device is reset, the firing handle 42 drives the push rod 12 to slide backwards, the first check valve is closed, the second check valve is opened, the second chamber 112, the liquid medicine channel 121 and the medicine storage device are communicated, and the liquid medicine enters the second chamber 112. The processes of percussion and resetting are repeated to realize continuous medicine injection. The amount of the drug to be injected is adjusted by rotating the turning knob 53.

The operation method comprises the following steps:

(1) introducing a guide wire into a diseased blood vessel part;

(2) delivering the thrombolytic catheter to the lesion part along the guide wire;

(3) withdrawing the guide wire, replacing the guide wire with a plugging guide wire, enabling the plugging guide wire to reach the designated position along the thrombolytic catheter, and sealing the distal end of the thrombolytic catheter;

(4) and connecting the injection device with the thrombolytic drug assembled with the thrombolytic drug to the thrombolytic catheter, repeatedly pressing the drug injector, and injecting the thrombolytic drug into the thrombolytic tube and then ejecting the thrombolytic drug through the side hole.

(5) And (5) completing thrombolysis and withdrawing all instruments.

Example 2

The present embodiment is a preferred embodiment of the thrombolytic system provided by the present invention, the structural configuration of which is substantially the same as that of embodiment 1, except that the adjustment mechanism is different, and the adjustment assembly thereof comprises a barrier member 55 movably disposed on the sliding groove 421, and a fixing member 56 capable of cooperating with the barrier member 55, and the sliding distance of the sliding block 422 is controlled by the cooperation of the barrier member 55 and the fixing member 56.

Specifically, the blocking member 55 is sleeved on the chute 421 and can slide along the chute 421, the fixing member 56 is a knob disposed on the blocking member 55, the knob is screwed to tighten the blocking member 55 and prevent the blocking member from sliding on the chute 421, when the injection amount of the medicine needs to be adjusted, the trigger handle 42 is pushed to make the medicine in the second chamber 112 reach a required amount, the slider 422 is moved to a position tangent to the protrusion 4221 of the slider 422, and then the knob is screwed to tighten and fix the blocking member 55, so as to adjust the injection amount of the medicine.

The present invention has been described in detail, but the present invention is not limited to the above-described embodiments. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. A thrombolysis system comprising a thrombolysis catheter and a drug injection device, characterized in that the drug injection device comprises an injection mechanism (1), the injection mechanism (1) comprising:

an injection tube (11), wherein the liquid outlet end of the injection tube (11) is detachably connected with the proximal end of the thrombolytic catheter,

a push rod (12), the push rod (12) is connected with the inside of the injection tube (11) in a sliding way, a liquid medicine channel (121) is arranged inside the push rod (12),

a check valve assembly including a first check valve disposed in the syringe (11), a second check valve disposed on the pushrod (12);

the drug injection device further comprises:

a liquid storage device (6), wherein the liquid storage device (6) is communicated with the liquid medicine channel (121) through a pipeline,

the driving mechanism (4) is used for driving the push rod (12) to slide in the injection tube (11), if the driving mechanism (4) drives the push rod (12) to slide towards the direction close to the liquid outlet end, the first check valve is opened, the second check valve is closed, and the injection tube (11) is communicated with the thrombolytic catheter; if the driving mechanism (4) drives the push rod (12) to slide towards the direction far away from the liquid outlet end, the first check valve is closed, the second check valve is opened, and the injection tube (11), the liquid medicine channel (121) and the liquid storage device (6) are communicated;

an adjustment mechanism (5) capable of controlling the maximum distance that the push rod (12) slides relative to the syringe (11).

2. The thrombolysis system according to claim 1, further comprising a blocking guidewire disposed through the thrombolysis catheter for closing a distal end of the thrombolysis catheter, the drug injection device further comprising a tee (7) for connecting the thrombolysis catheter and the fluid outlet end, a first port of the tee (7) being in fixed communication with the fluid outlet end, a second port of the tee (7) being in detachable communication with the thrombolysis catheter, and a proximal end of the blocking guidewire passing from the second port of the tee (7) into and through the tee (7) and being in detachable sealing connection with a third port of the tee (7).

3. The thrombolysis system according to claim 2, wherein the tee fitting (7) comprises a main tube and a branch tube, one end of the main tube is communicated with the side wall of the branch tube, the other end of the main tube is the first port, one end of the branch tube is the second port, the second port is communicated with the thrombolysis catheter through a luer (8), the other end of the branch tube is the third port, the third port is provided with a sealing device, and the plugging guide wire passes through the sealing device (9) and is fixedly connected with the sealing device.

4. The thrombolytic system of claim 1,

a partition plate fixedly connected with the injection tube (11) is arranged in the injection tube (11), the partition plate divides the interior of the injection tube (11) into a first chamber (111) and a second chamber (112), the middle part of the partition plate extends into the first chamber (111) to form a channel (113) capable of communicating the first chamber (111) with the second chamber (112),

the first check valve comprises a first elastic piece sleeved on the channel (113) and a first baffle plate (31) fixedly connected with the first elastic piece, and under the initial no-load state, the first baffle plate (31) is connected with the outlet of the channel (113) through the first elastic piece and closes the outlet of the channel (113);

if the driving mechanism (4) drives the push rod (12) to slide towards the direction close to the liquid outlet end, the first baffle (31) leaves the outlet of the channel (113), and the thrombolytic catheter, the first chamber (111) and the second chamber (112) are communicated;

if the driving mechanism (4) drives the push rod (12) to slide towards the direction far away from the liquid outlet end, the first baffle (31) approaches to the outlet of the channel (113) and closes the outlet of the channel (113).

5. A thrombolytic system according to claim 4, wherein the first resilient member is a first spring (32), one end of the first spring (32) is fixedly connected to the first barrier (31), and the other end of the first spring (32) is fixedly connected to the inner wall of the first chamber (111) and/or the partition.

6. A thrombolytic system according to claim 1, wherein the second non-return valve comprises a second stop plate (33) and a second resilient member fixedly connected to the second stop plate (33) and the push rod (12), the second stop plate (33) being connected to the push rod (12) via the second resilient member and closing the outlet of the drug passage (121) in an initial unloaded state;

if the driving mechanism (4) drives the push rod (12) to slide towards the direction close to the liquid outlet end, the second baffle (33) is connected with the push rod (12), and the outlet of the liquid medicine channel (121) is closed;

if the driving mechanism (4) drives the push rod (12) to slide towards the direction far away from the liquid outlet end, the second baffle (33) leaves the push rod (12), and the injection tube (11), the liquid medicine channel (121) and the liquid storage device (6) are communicated.

7. The thrombolytic system of claim 6,

the second elastic piece is a second spring (34);

an installation pipeline used for installing the second spring (34) is arranged in the push rod (12), one end of the installation pipeline is communicated with the injection tube (11), the other end of the installation pipeline is communicated with the liquid medicine channel, one end of the second spring (34) is fixedly connected with the second baffle (33), and the other end of the second spring (34) is fixedly connected with the inner wall of the installation pipeline.

8. The thrombolysis system according to claim 1, wherein the adjustment mechanism (5) comprises an adjustment assembly provided on the drive mechanism (4).

9. The thrombolytic system of claim 8,

the drive mechanism (4) comprises:

the sliding block (422) is fixedly arranged on the push rod (12);

the firing handle (42) is provided with a sliding chute (421) matched with the sliding block (422), and the firing handle (42) and the push rod (12) are rotated and connected in a sliding manner through the matching of the sliding block (422) and the sliding chute (421);

a fixed handle (41), the fixed handle (41) is fixedly connected with the injection tube (11), the firing handle (42) is rotatably connected with the fixed handle (41),

the adjusting assembly comprises a blocking piece (55) movably arranged on the sliding groove (421), and a fixing piece (56) capable of being matched with the blocking piece (55), the sliding distance of the sliding block (422) is controlled through the matching of the blocking piece (55) and the fixing piece (56),

and/or the presence of a gas in the gas,

the adjusting component comprises a cam component which is arranged between the firing handle (42) and the fixed handle (41) and can drive the firing handle (42) to rotate,

the cam assembly includes:

one end of the cam (51) is rotationally connected with the fixed handle (41) through a pin shaft (52), the other end of the cam (51) is abutted against the firing handle (42),

a rotating knob (53), the rotating knob (53) is fixedly connected with the pin shaft (52),

the distance for pushing the push rod (12) to slide by the firing handle (42) is controlled by the rotating knob (53) and the cam (51).

10. The thrombolytic system of claim 1, wherein the reservoir (6) is a syringe; the liquid storage device (6) is detachably connected with the push rod (12) through a pipeline.

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